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As filed with the Securities and Exchange Commission on May 11, 2012

1933 Act File No. 333-179887

1940 Act File No. 811-22673

UNITED STATES

SECURITIES AND EXCHANGE COMMISSION

WASHINGTON, D.C. 20549

FORM N-2

(Check appropriate box or boxes)

and

PIMCO Dynamic Income Fund

(Exact Name of Registrant as Specified in Charter)

1633 Broadway

New York, New York 10019

(Address of Principal Executive Offices)

(Number, Street, City, State, Zip Code)

(212) 739-3222

(Registrant’s Telephone Number, including Area Code)

Thomas J. Fuccillo, Esq.

c/o Allianz Global Investors Fund Management LLC

1633 Broadway

New York, New York 10019

(Name and Address (Number, Street, City, State, Zip Code) of Agent for Service)

Approximate Date of Proposed Public Offering:

As soon as practicable after the effective date of this Registration Statement.

If any securities being registered on this form will be offered on a delayed or continuous basis in reliance on Rule 415 under the Securities Act of 1933, other than securities offered in connection with a dividend reinvestment plan, check the following box ¨ .

It is proposed that this filing will become effective (check appropriate box):

The registrant hereby amends this Registration Statement on such date or dates as may be necessary to delay its effective date until the registrant shall file a further amendment that specifically states that this Registration Statement shall thereafter become effective in accordance with Section 8(a) of the Securities Act of 1933 or until this Registration Statement shall become effective on such date as the Commission, acting pursuant to said Section 8(a), may determine.

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The information in this preliminary prospectus is not complete and may be changed. We may not sell these securities until the registration statement filed with the Securities and Exchange Commission is effective. This preliminary prospectus is not an offer to sell these securities and it is not soliciting an offer to buy these securities in any state where the offer or sale is not permitted.

Preliminary Prospectus (Subject to Completion) dated May 11, 2012

PROSPECTUS

            Shares

PIMCO Dynamic Income Fund

Common Shares

$25.00 per Share

PIMCO Dynamic Income Fund (the “Fund”) is offering             common shares of beneficial interest (“common shares”). This is the initial public offering of the Fund’s common shares and no public market exists for its common shares.

Investment Objectives.   The Fund is a newly organized, non-diversified, closed-end management investment company. The Fund seeks current income as a primary objective and capital appreciation as a secondary objective. No assurance can be given that the Fund’s investment objectives will be achieved, and you could lose all of your investment in the Fund.

Investment Strategy.   The Fund will invest in fixed-income securities and related instruments of any type and credit quality worldwide and will seek to achieve its investment objectives to produce total return for shareholders by utilizing a dynamic asset allocation strategy among multiple fixed-income sectors, including below investment-grade, mortgage-related and any other asset-backed securities, government and sovereign debt, corporate debt (including fixed- and floating-rate bonds, bank loans and convertible securities), taxable municipal bonds and other income-producing securities of U.S. and foreign issuers, including emerging market issuers. The Fund will be managed according to strategies that focus on credit quality, duration management and other risk management techniques. On behalf of the Fund, Pacific Investment Management Company LLC, the Fund’s sub-adviser (“PIMCO” or the “Sub-Adviser”), employs an active approach to allocation among multiple fixed-income sectors based on, among other things, market conditions, valuation assessments and economic outlook, credit market trends and other economic factors.

(continued on following page)

No Prior History.   Because the Fund is newly organized, its common shares have no history of public trading. Shares of closed-end funds frequently trade at a significant discount from their net asset value, which creates a risk of loss for investors purchasing shares in the initial public offering. This risk is greater for investors who expect to sell their shares in a relatively short period after completion of the initial public offering.

The Fund anticipates that its common shares will be listed on the New York Stock Exchange, subject to notice of issuance, under the trading or “ticker” symbol “PDI.”

Investment in the Fund’s common shares involves substantial risks arising from, among other strategies, the Fund’s ability to invest in debt instruments that are, at the time of purchase, rated below investment grade (below Baa3 by Moody’s Investors Service, Inc. (“Moody’s”) or below BBB by either Standard & Poor’s Ratings Services, a division of The McGraw-Hill Company, Inc. (“S&P”) or Fitch, Inc. (“Fitch”)) or unrated but determined by PIMCO to be of comparable quality, the Fund’s exposure to foreign and emerging markets securities and currencies and to mortgage-related and other asset-backed securities, and the Fund’s anticipated use of leverage. Debt securities of below investment grade quality are regarded as having predominantly speculative characteristics with respect to capacity to pay interest and to repay principal, and are commonly referred to as “high yield” securities or “junk bonds.” The Fund’s exposure to foreign securities and currencies, and particularly to emerging markets securities and currencies, involves special risks, including foreign currency risk and the risk that the securities may decline in response to unfavorable political and legal developments, unreliable or untimely information or economic and financial instability. Mortgage-related and other asset-backed securities are subject to extension and prepayment risk and often have complicated structures that make them difficult to value. Because of the risks associated with investing in high yield securities, foreign and emerging market securities (and related exposure to foreign currencies) and mortgage-related and other asset-backed securities, and using leverage, an investment in the Fund should be considered speculative. Before buying any of the Fund’s common shares, you should read the discussion of the principal risks of investing in the Fund in “Principal Risks of the Fund” beginning on page 70 of this prospectus.

The Securities and Exchange Commission and state securities regulators have not approved or disapproved of these securities or determined if this prospectus is truthful or complete. Any representation to the contrary is a criminal offense.

The underwriters expect to deliver the common shares to purchasers on or about             , 2012.

The date of this prospectus is             , 2012

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It is expected that the Fund normally will have a short to intermediate average portfolio duration ( i.e. , within a zero- to eight-year (0 to 8) range), as calculated by the Sub-Adviser, although it may be shorter or longer at any time or from time to time depending on market conditions and other factors. PIMCO believes that maintaining duration within this range offers flexibility and the opportunity for above-average returns while potentially limiting exposure to interest rate volatility and related risks.

Portfolio Contents.   The Fund normally invests worldwide in a portfolio of debt obligations and other income-producing securities of any type and credit quality, with varying maturities and related derivative instruments.

The Fund may invest without limit in securities of U.S. issuers and without limit in securities of foreign (non-U.S.) issuers, securities traded principally outside of the United States, and securities denominated in currencies other than the U.S. dollar. The Fund may normally invest up to 40% of its total assets in securities of issuers economically tied to “emerging market” countries. The Fund may also invest directly in foreign currencies, including local emerging market currencies.

The Fund’s portfolio of income-producing securities may include, without limitation, bonds, debentures, notes, and other debt securities of U.S. and foreign corporate and other issuers, including commercial paper; mortgage-related and any other type of asset-backed securities issued on a public or private basis; U.S. Government securities; obligations of foreign governments or their sub-divisions, agencies and government sponsored enterprises and obligations of international agencies and supranational entities; municipal securities and other debt securities issued by states or local governments and their agencies, authorities and other government-sponsored enterprises, including taxable municipal securities (such as Build America Bonds); payment-in-kind securities; zero-coupon bonds; inflation-indexed bonds issued by both governments and corporations; structured notes, including hybrid or indexed securities; catastrophe bonds and other event-linked bonds; credit-linked notes; structured credit products; and bank certificates of deposit, fixed time deposits and bankers’ acceptances. The rate of interest on an income-producing security may be fixed, floating or variable. The Fund may normally invest up to 40% of its total assets in bank loans (including, among others, senior loans, delayed funding loans, revolving credit facilities and loan participations and assignments). The Fund will not normally invest more than 10% of its total assets in convertible debt securities, including synthetic convertible debt securities. Substantially all of the Fund’s portfolio may consist of below investment grade securities and/or mortgage-related or other types of asset-backed securities. However, the Fund will not normally invest more than 20% of its total assets in debt instruments, other than mortgage-related or asset-backed securities, that are, at the time of purchase, rated CCC+ or lower by S&P and Fitch and Caa1 or lower by Moody’s, or that are unrated but determined by PIMCO to be of comparable quality to securities so rated. The Fund may invest without limitation in mortgage-related and other asset-backed securities regardless of rating— i.e ., of any credit quality. The Fund may also invest in preferred securities.

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As a matter of fundamental policy, the Fund will normally invest at least 25% of its total assets in privately-issued (commonly known as “non-agency”) mortgage-related securities.

The Fund may utilize various derivative strategies (both long and short positions) involving the purchase or sale of futures and forward contracts (including foreign currency exchange contracts), call and put options, credit default swaps, total return swaps, basis swaps and other swap agreements and other derivative instruments for investment purposes, leveraging purposes or in an attempt to hedge against market, credit, interest rate, currency and other risks in the portfolio. The Fund may purchase and sell securities on a when-issued, delayed delivery or forward commitment basis and may engage in short sales.

The Fund will not normally invest directly in common stocks of operating companies. However, the Fund may own and hold common stocks in its portfolio from time to time in connection with a corporate action or the restructuring of a debt instrument or through the conversion of a convertible security held by the Fund. The Fund may invest in securities that have not been registered for public sale in the U.S. or relevant foreign jurisdiction, including without limitation securities eligible for purchase and sale pursuant to Rule 144A under the Securities Act of 1933, as amended (the “Securities Act”), or relevant provisions of applicable non-U.S. law, and other securities issued in private placements. The Fund may also invest in securities of other investment companies, including, without limitation, exchange-traded funds (“ETFs”), and may invest in foreign ETFs. The Fund may invest in real estate investment trusts (“REITs”). The Fund may invest in securities of companies with small and medium market capitalizations.

The Fund may invest without limit in illiquid securities ( i.e. , securities that cannot be disposed of within seven days in the ordinary course of business at approximately the value at which the Fund has valued the securities).

Leverage.    As soon as reasonably practicable following the completion of the initial public offering of the Fund’s common shares, the Fund intends, subject to then favorable market conditions, to add leverage to its portfolio by utilizing reverse repurchase agreements, such that the leverage initially obtained utilizing reverse repurchase agreements represents approximately 29% of the Fund’s total assets (including the amounts of leverage obtained through the use of such instruments). The Fund may also obtain leverage through dollar rolls or borrowings, such as through bank loans or commercial paper or other credit facilities. The Fund may also enter into transactions other than those noted above that may give rise to a form of leverage including, among others, futures and forward contracts (including foreign currency exchange contracts), credit default swaps, total return swaps and other derivative transactions, loans of portfolio securities, short sales and when-issued, delayed delivery and forward commitment transactions. Although it has no current intention to do so, the Fund may also determine to issue preferred shares or other types of senior securities to add leverage to its portfolio. The Fund intends to utilize reverse repurchase agreements, borrowings and other forms of leverage opportunistically and may choose to increase or decrease, or eliminate entirely, its use of leverage over time and from time to time ( i.e. , higher or lower than the anticipated approximate 29% initial reverse repurchase agreement level noted above) based on PIMCO’s assessment of the yield curve environment, interest rate trends, market conditions and other factors. Under normal market conditions, the Fund will limit its use of leverage from any combination of reverse repurchase agreements or dollar roll transactions (whether or not these instruments are covered), borrowings ( i.e. , loans or lines of credit from banks or other credit facilities), any future issuance of preferred shares and, to the extent described in this prospectus under the section entitled “Leverage,” credit default swaps, other swap agreements and futures contracts such that the assets attributable to the use of such leverage will not exceed 50% of the Fund’s total assets (including, for purposes of the 50% limit, the amounts of leverage obtained through the use of such instruments). The Investment Company Act of 1940, as amended, and the rules and regulations promulgated thereunder, also generally limits the extent to which the Fund may utilize uncovered reverse repurchase agreements and borrowings, together with any other senior securities representing indebtedness, to 33  ¹ / 3 % of the Fund’s total assets at the time utilized. See “Leverage.” By using leverage, the Fund will seek to obtain a higher return for holders of common shares than if the Fund did not use leverage. Leveraging is a speculative technique and there are special risks and costs involved. There can be no assurance that a leveraging strategy will be used or that it will be successful during any period in which it is employed. See “Leverage” and “Principal Risks of the Fund—Leverage Risk.”

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Certain numbers and percentages have been rounded for ease of presentation, which may result in amounts not totaling precisely.

Please read this prospectus carefully before deciding whether to invest and retain it for future reference. It sets forth concisely the information about the Fund that a prospective investor ought to know before investing in the Fund. The Fund has filed with the Securities and Exchange Commission a Statement of Additional Information dated             , 2012, containing additional information about the Fund. The Statement of Additional Information is incorporated by reference into this prospectus, which means it is part of this prospectus for legal purposes. The Fund will also produce both annual and semi-annual reports that will contain important information about the Fund. Copies of the Statement of Additional Information and the Fund’s annual and semi-annual reports, when available, may be obtained upon request, without charge, by calling toll-free (800) 254-5197 or by writing to the Fund at 1633 Broadway, New York, New York 10019. You may also call this toll-free telephone number to request other information about the Fund or to make shareholder inquiries. The Statement of Additional Information is (for a period of 60 days after completion of the initial public offering of the Fund’s common shares), and the annual report and the semi-annual report will be, made available free of charge on the Fund’s website at www.allianzinvestors.com. Information on, or accessible through, the Fund’s website is not a part of, and is not incorporated into, this prospectus. The Securities and Exchange Commission maintains an internet website (www.sec.gov) that contains other information regarding the Fund. The table of contents for the Statement of Additional Information appears on page 111 of this prospectus.

The Fund’s common shares do not represent a deposit or obligation of, and are not guaranteed or endorsed by, any bank or other insured depository institution, and are not federally insured by the Federal Deposit Insurance Corporation, the Federal Reserve Board or any other government agency.

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You should rely only on the information contained or incorporated by reference in this prospectus. The Fund has not, and the underwriters have not, authorized anyone to provide you with inconsistent information. If anyone provides you with inconsistent information, you should not assume that the Fund or the underwriters have authorized or verified it. The Fund is not, and the underwriters are not, making an offer of these securities in any state where the offer is not permitted. You should not assume that the information contained in this prospectus is accurate as of any date other than the date on the front of this prospectus. The Fund’s business, financial condition, results of operations and prospects may have changed since that date.

Until             , 2012 (25 days after the commencement of this offering), all dealers that buy, sell or trade the Fund’s common shares, whether or not participating in this offering, may be required to deliver a prospectus. This delivery requirement is in addition to the dealers’ obligation to deliver a prospectus when acting as underwriters and with respect to their unsold allotments or subscriptions.

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SUMMARY OF FUND EXPENSES

The following table and the expenses shown assume the use by the Fund of leverage in the form of reverse repurchase agreements in an amount equal to 29% of the Fund’s total assets (including the amounts of leverage obtained through the use of such instruments), and show Fund expenses as a percentage of net assets attributable to Common Shares. Footnote 4 to the table also shows Fund expenses as a percentage of net assets attributable to Common Shares, but assumes that the Fund does not utilize reverse repurchase agreements, borrowings or other leverage.

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The purpose of the table above is to help you understand all fees and expenses that you, as a Common Shareholder, would bear directly or indirectly. The Other Expenses shown in the table and related footnotes are based on estimated amounts for the Fund’s first year of operations and assume that the Fund issues approximately 12,000,000 Common Shares. If the Fund issues fewer Common Shares, all other things being equal, these expenses would increase. See “Management of the Fund” and “Dividend Reinvestment Plan.”

Example

As required by relevant SEC regulations, the following example illustrates the expenses (including the sales load of $45 and estimated offering expenses of this offering of approximately $2) that you would pay on a $1,000 investment in Common Shares, assuming (a) the sales load and the offering expenses listed in the parenthetical above, (b) total annual expenses of 2.21% of net assets attributable to Common Shares in years 1 through 10 (assuming reverse repurchase agreements are utilized in an amount equal to 29% of the Fund’s total assets) and (c) a 5% annual return ⁽¹⁾ :

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THE FUND

The Fund is a newly organized, non-diversified, closed-end management investment company registered under the 1940 Act. The Fund was organized as a Massachusetts business trust on January 19, 2011, pursuant to the Declaration, which is governed by the laws of The Commonwealth of Massachusetts. As a newly organized entity, the Fund has no operating history. The Fund’s principal office is located at 1633 Broadway, New York, New York 10019, and its telephone number is (800)  254-5197.

USE OF PROCEEDS

The net proceeds of the offering of Common Shares will be approximately $            (or $            if the underwriters exercise the over-allotment option in full) after payment or reimbursement of the estimated offering costs. The Sub-Adviser has agreed to pay the amount by which the Fund’s offering costs (other than the sales load) exceed $0.05 per Common Share. The Sub-Adviser has agreed to pay all of the Fund’s organizational expenses. The Fund will invest the net proceeds of the offering in accordance with the Fund’s investment objectives and policies as stated below. It is presently anticipated that the Fund will be able to invest substantially all of the net proceeds in investments that meet its investment objectives and policies within three months after the completion of the offering. Pending such investment, it is anticipated that the proceeds will be invested in high grade, short-term instruments, credit default swaps, total return swaps and/or index futures contracts or similar derivative instruments designed to give the Fund exposure to the securities and markets in which it intends to invest while PIMCO selects specific investments.

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THE FUND’S INVESTMENT OBJECTIVES AND STRATEGIES

Investment Objectives

The Fund seeks current income as a primary objective and capital appreciation as a secondary objective. The Fund will seek to achieve its investment objectives to produce total return for shareholders by utilizing a dynamic asset allocation strategy among multiple fixed-income sectors to invest in a portfolio of fixed-income securities and related instruments of any type and any quality worldwide. The types of securities and instruments in which the Fund may invest are summarized under “—Portfolio Contents” below. The Fund cannot assure you that it will achieve its investment objectives, and you could lose all of your investment in the Fund.

The Fund cannot change its investment objectives without the approval of the holders of a “majority of the outstanding” shares of the Fund. A “majority of the outstanding” shares (whether voting together as a single class or voting as a separate class) means (i) 67% or more of such shares present at a meeting, if the holders of more than 50% of those shares are present or represented by proxy, or (ii) more than 50% of such shares, whichever is less.

Allianz Global Investors Fund Management LLC serves as the investment manager of the Fund and retains its affiliate, PIMCO, to serve as sub-adviser and to manage the Fund’s portfolio. See “Management of the Fund” below. The portfolio management strategies and techniques to be utilized by PIMCO are described below.

Portfolio Management Strategies

Dynamic Allocation Strategy.     On behalf of the Fund, PIMCO employs an active approach to allocation among multiple fixed-income sectors based on, among other things, market conditions, valuation assessments and economic outlook, credit market trends and other economic factors. With PIMCO’s macroeconomic analysis as the basis for top-down investment decisions, including geographic and credit sector emphasis, the Fund has the flexibility to allocate its assets among a broad spectrum of asset classes and issuers of any credit quality, including mortgage-related and any other asset-backed securities, government and sovereign debt, corporate debt (including fixed- and floating-rate bonds, bank loans and convertible securities), taxable municipal bonds and other income-producing securities of U.S. and foreign issuers, including emerging market issuers. PIMCO may choose to focus on particular countries/regions ( e.g. , U.S. vs. foreign), asset classes, industries and sectors to the exclusion of others at any time and from time to time based on market conditions and other factors. The relative value assessment within fixed-income sectors draws on PIMCO’s regional and sector specialist expertise. As a matter of fundamental policy, the Fund will, however, normally invest at least 25% of its total assets in privately-issued (commonly known as “non-agency”) mortgage-related securities. The Fund will observe other guidelines with respect to certain asset classes as summarized below.

Investment Selection Strategies.     Once the Fund’s top-down, portfolio positioning decisions have been made as described above, PIMCO selects particular investments for the Fund by employing a bottom-up, disciplined credit approach which is driven by fundamental, independent research within each asset class/sector represented in the Fund, with a focus on identifying securities and other instruments with solid and/or improving fundamentals. PIMCO utilizes strategies that focus on credit quality analysis, duration management and other risk management techniques. PIMCO attempts to identify, through fundamental research, driven by independent credit analysis and proprietary analytical tools, debt obligations and other income-producing securities that provide current income and/or opportunities for capital appreciation based on its analysis of the issuer’s credit characteristics and the position of the security in the issuer’s capital structure.

PIMCO also attempts to identify investments that may appreciate in value based on PIMCO’s assessment of the issuer’s credit characteristics, forecast for interest rates and outlook for particular countries/regions, currencies, industries, sectors and the global economy and bond markets generally.

Credit Quality.     The Fund may invest in debt instruments that are, at the time of purchase, rated below investment grade, or unrated but determined by PIMCO to be of comparable quality. However, the Fund will not normally invest more than 20% of its total assets in debt instruments, other than mortgage-related and other asset-backed securities, that are, at the time of purchase, rated CCC+ or lower by S&P and Fitch and Caa1 or lower by Moody’s or that are unrated but determined by PIMCO to be of comparable quality to securities so rated. The Fund may invest without limitation in mortgage-related and other asset-backed securities regardless of rating— i.e. , of any

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credit quality. Debt instruments of below investment grade quality are regarded as having predominantly speculative characteristics with respect to capacity to pay interest and to repay principal, and are commonly referred to as “high yield” securities or “junk bonds.” Debt instruments in the lowest investment grade category also may be considered to possess some speculative characteristics. The Fund may, for hedging, investment or leveraging purposes, make use of credit default swaps, which are contracts whereby one party makes periodic payments to a counterparty in exchange for the right to receive from the counterparty a payment equal to the par (or other agreed-upon) value of a referenced debt obligation in the event of a default or other credit event by the issuer of the debt obligation.

Independent Credit Analysis.     PIMCO relies primarily on its own analysis of the credit quality and risks associated with individual debt instruments considered for the Fund, rather than relying exclusively on rating agencies or third-party research. The Fund’s portfolio managers utilize this information in an attempt to minimize credit risk and to identify issuers, industries or sectors that are undervalued or that offer attractive yields relative to PIMCO’s assessment of their credit characteristics. This aspect of PIMCO’s capabilities will be particularly important to the extent that the Fund invests in high yield securities and in securities of emerging market issuers.

Duration Management.     It is expected that the Fund normally will have a short to intermediate average portfolio duration ( i.e. , within a zero- to eight-year (0 to 8) range), as calculated by the Sub-Adviser, although it may be shorter or longer at any time or from time to time depending on market conditions and other factors. PIMCO believes that maintaining duration within this range offers flexibility and the opportunity for above-average returns while potentially limiting exposure to interest rate volatility and related risk. Duration is a measure used to determine the sensitivity of a security’s price to changes in interest rates. The Fund’s duration strategy may entail maintaining a negative average portfolio duration from time to time, which would potentially benefit the portfolio in an environment of rising market interest rates, but would generally adversely impact the portfolio in an environment of falling market interest rates. PIMCO may also utilize certain strategies, including without limitation investments in structured notes or interest rate futures contracts or swap, cap, floor or collar transactions, for the purpose of reducing the interest rate sensitivity of the Fund’s portfolio, although there is no assurance that it will do so or that such strategies will be successful.

Diversification.     The Fund is a “non-diversified” investment company in that it may invest a greater percentage of its assets in the securities of a single issuer than investment companies that are “diversified.” See “Principal Risks of the Fund—Issuer Non-Diversification Risk.”

Portfolio Contents and Other Information

The Fund normally invests worldwide in a portfolio of debt obligations and other income-producing securities of any type and credit quality, with varying maturities and related derivative instruments.

The Fund may invest without limit in securities of U.S. issuers and without limit in securities of foreign (non-U.S.) issuers, securities traded principally outside of the United States, and securities denominated in currencies other than the U.S. dollar. The Fund may normally invest up to 40% of its total assets in securities of issuers economically tied to “emerging market” countries. The Fund may also invest directly in foreign currencies, including local emerging market currencies.

The Fund’s portfolio of income-producing securities may include, without limitation, bonds, debentures, notes, and other debt securities of U.S. and foreign corporate and other issuers, including commercial paper; mortgage-related and any other type of asset-backed securities issued on a public or private basis; U.S. Government securities; obligations of foreign governments or their sub-divisions, agencies and government sponsored enterprises and obligations of international agencies and supranational entities; municipal securities and other debt securities issued by states or local governments and their agencies, authorities and other government-sponsored enterprises, including taxable municipal securities (such as Build America Bonds); payment-in-kind securities; zero-coupon bonds; inflation-indexed bonds issued by both governments and corporations; structured notes, including hybrid or indexed securities; catastrophe bonds and other event-linked bonds; credit-linked notes; structured credit products; and bank certificates of deposit, fixed time deposits and bankers’ acceptances. The rate of interest on an income-producing security may be fixed, floating or variable. The Fund may normally invest up to 40% of its total assets in bank loans (including, among others, senior loans,

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delayed funding loans, revolving credit facilities and loan participations and assignments). The Fund will not normally invest more than 10% of its total assets in convertible debt securities ( i.e. , debt securities that may be converted at either a stated price or stated rate into underlying shares of common stock), including synthetic convertible debt securities ( i.e. , instruments created through a combination of separate securities that possess the two principal characteristics of a traditional convertible security, i.e. , an income-producing security and the right to acquire an equity security). Substantially all of the Fund’s portfolio may consist of below investment grade securities and/or mortgage-related or other types of asset-backed securities. However, the Fund will not normally invest more than 20% of its total assets in debt instruments, other than mortgage-related and other asset-backed securities, that are, at the time of purchase, rated CCC+ or lower by S&P and Fitch and Caa1 or lower by Moody’s, or that are unrated but determined by PIMCO to be of comparable quality to securities so rated. The Fund may invest without limitation in mortgage-related and other asset backed securities regardless of rating— i.e. , of any credit quality. The Fund may also invest in preferred securities.

As a matter of fundamental policy, the Fund will normally invest at least 25% of its total assets in privately-issued (commonly known as “non-agency”) mortgage-related securities.

The Fund may utilize various derivative strategies (both long and short positions) involving the purchase or sale of futures and forward contracts (including foreign currency exchange contracts), call and put options, credit default swaps, total return swaps, basis swaps and other swap agreements and other derivative instruments for investment purposes, leveraging purposes or in an attempt to hedge against market, credit, interest rate, currency and other risks in the portfolio. The Fund may purchase and sell securities on a when-issued, delayed delivery or forward commitment basis and may engage in short sales.

The Fund will not normally invest directly in common stocks of operating companies. However, the Fund may own and hold common stocks in its portfolio from time to time in connection with a corporate action or the restructuring of a debt instrument or through the conversion of a convertible security held by the Fund. The Fund may invest in securities that have not been registered for public sale in the U.S. or relevant non-U.S. jurisdiction, including without limitation securities eligible for purchase and sale pursuant to Rule 144A under the Securities Act, or relevant provisions of applicable non-U.S. law, and other securities issued in private placements. The Fund may also invest in securities of other investment companies, including without limitation ETFs, and may invest in foreign ETFs. The Fund may invest in REITs. The Fund may invest in securities of companies with small and medium market capitalizations.

The Fund may invest without limit in illiquid securities ( i.e. , securities that cannot be disposed of within seven days in the ordinary course of business at approximately the value at which the Fund has valued the securities).

Upon the Investment Manager’s or PIMCO’s recommendation, for temporary defensive purposes and in order to keep its cash fully invested, including during the period in which the net proceeds of this offering are being invested, the Fund may deviate from its investment strategy by investing some or all of its total assets in investments such as high grade debt securities, including high quality, short-term debt securities, and cash and cash equivalents. The Fund may not achieve its investment objectives when it does so.

The following provides additional information regarding the types of securities and other instruments in which the Fund will ordinarily invest. A more detailed discussion of these and other instruments and investment techniques that may be used by the Fund is provided under “Investment Objectives and Policies” in the Statement of Additional Information.

High Yield Securities (“Junk Bonds”)

The Fund may invest in debt instruments that are rated below investment grade (below Baa3 by Moody’s or below BBB by either S&P or Fitch) or unrated but determined by PIMCO to be of comparable quality. However, the Fund will not normally invest more than 20% of its total assets in debt instruments, other than mortgage-related and other asset-backed securities, that are, at the time of purchase, rated CCC+ or lower by S&P and Fitch and Caa1 or lower by Moody’s or that are unrated but determined by PIMCO to be of comparable quality to securities so rated. The Fund may invest without limitation in mortgage-related and other asset-backed securities

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regardless of rating— i.e., of any credit quality. Below investment grade securities are commonly referred to as “high yield” securities or “junk bonds.” High yield securities involve a greater degree of risk (in particular, a greater risk of default) than, and special risks in addition to the risks associated with, investment grade debt obligations. While offering a greater potential opportunity for capital appreciation and higher yields, high yield securities typically entail greater potential price volatility and may be less liquid than higher-rated securities. High yield securities may be regarded as predominantly speculative with respect to the issuer’s continuing ability to make timely principal and interest payments. They also may be more susceptible to real or perceived adverse economic and competitive industry conditions than higher-rated securities. Debt securities in the lowest investment grade category also may be considered to possess some speculative characteristics by certain ratings agencies.

The market values of high yield securities tend to reflect individual developments of the issuer to a greater extent than do higher-quality securities, which tend to react mainly to fluctuations in the general level of interest rates. In addition, lower-quality debt securities tend to be more sensitive to general economic conditions. Certain emerging market governments that issue high yield securities in which the Fund may invest are among the largest debtors to commercial banks, foreign governments and supranational organizations, such as the World Bank, and may not be able or willing to make principal and/or interest payments as they come due.

Credit Ratings and Unrated Securities.     Rating agencies are private services that provide ratings of the credit quality of debt obligations. Appendix A to this prospectus describes the various ratings assigned to debt obligations by Moody’s, S&P and Fitch. As noted in Appendix A, Moody’s, S&P and Fitch may modify their ratings of securities to show relative standing within a rating category, with the addition of numerical modifiers (1, 2 or 3) in the case of Moody’s, and with the addition of a plus (+) or minus (-) sign in the case of S&P and Fitch. Ratings assigned by a rating agency are not absolute standards of credit quality and do not evaluate market risks. Rating agencies may fail to make timely changes in credit ratings and an issuer’s current financial condition may be better or worse than a rating indicates. The Fund will not necessarily sell a security when its rating is reduced below its rating at the time of purchase. PIMCO does not rely solely on credit ratings, and develops and relies primarily on its own analysis of issuer credit quality. The ratings of a debt security may change over time. Moody’s, S&P and Fitch monitor and evaluate the ratings assigned to securities on an ongoing basis. As a result, debt instruments held by the Fund could receive a higher rating (which would tend to increase their value) or a lower rating (which would tend to decrease their value) during the period in which they are held by the Fund.

The Fund may purchase unrated securities (which are not rated by a rating agency) if PIMCO determines that the securities are of comparable quality to rated securities that the Fund may purchase. Unrated securities may be less liquid than comparable rated securities and involve the risk that PIMCO may not accurately evaluate the security’s comparative credit rating. Analysis of the creditworthiness of issuers of high yield securities may be more complex than for issuers of higher-quality debt obligations. The Fund’s success in achieving its investment objectives may depend more heavily on PIMCO’s credit analysis to the extent that the Fund invests in below investment grade quality and unrated securities.

Foreign (Non-U.S.) Investments

The Fund may invest without limit in instruments of corporate and other foreign (non-U.S.) issuers, and in instruments traded principally outside of the United States. The Fund may invest in sovereign and other debt securities issued by foreign governments and their respective sub-divisions, agencies or instrumentalities, government sponsored enterprises and supranational government entities. Supranational entities include international organizations that are organized or supported by one or more government entities to promote economic reconstruction or development and by international banking institutions and related governmental agencies. As a holder of such debt securities, the Fund may be requested to participate in the rescheduling of such debt and to extend further loans to governmental entities. In addition, there are generally no bankruptcy proceedings similar to those in the United States by which defaulted foreign debt securities may be collected. Investing in foreign securities involves special risks and considerations not typically associated with investing in U.S. securities. See “Principal Risks of the Fund—Foreign (Non-U.S.) Investment Risk.”

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The Fund may invest in Brady Bonds, which are securities created through the exchange of existing commercial bank loans to sovereign entities for new obligations in connection with a debt restructuring. Investments in Brady Bonds may be viewed as speculative. Brady Bonds acquired by the Fund may be subject to restructuring arrangements or to requests for new credit, which may cause the Fund to realize a loss of interest or principal on any of its portfolio holdings.

The foreign securities in which the Fund may invest include without limitation Eurodollar obligations and “Yankee Dollar” obligations. Eurodollar obligations are U.S. dollar-denominated certificates of deposit and time deposits issued outside the U.S. capital markets by foreign branches of U.S. banks and by foreign banks. Yankee Dollar obligations are U.S. dollar-denominated obligations issued in the U.S. capital markets by foreign banks. Eurodollar and Yankee Dollar obligations are generally subject to the same risks that apply to domestic debt issues, notably credit risk, interest rate risk, market risk and liquidity risk. Additionally, Eurodollar (and to a limited extent, Yankee Dollar) obligations are subject to certain sovereign risks. One such risk is the possibility that a sovereign country might prevent capital, in the form of U.S. dollars, from flowing across its borders. Other risks include adverse political and economic developments; the extent and quality of government regulation of financial markets and institutions; the imposition of foreign withholding taxes; and the expropriation or nationalization of foreign issuers.

Emerging Markets Investments

The Fund may normally invest up to 40% of its total assets in securities of issuers economically tied to “emerging market” countries. PIMCO generally considers an instrument to be economically tied to an emerging market country if the security’s “country of exposure” is an emerging market country, as determined by the criteria set forth below. Alternatively, such as when a “country of exposure” is not available or when PIMCO believes the following tests more accurately reflect which country the security is economically tied to, PIMCO may consider an instrument to be economically tied to an emerging market country if the issuer or guarantor is a government of an emerging market country (or any political subdivision, agency, authority or instrumentality of such government), if the issuer or guarantor is organized under the laws of an emerging market country, or if the currency of settlement of the security is a currency of an emerging market country. With respect to derivative instruments, PIMCO generally considers such instruments to be economically tied to emerging market countries if the underlying assets are currencies of emerging market countries (or baskets or indexes of such currencies), or instruments or securities that are issued or guaranteed by governments of emerging market countries or by entities organized under the laws of emerging market countries. An instrument’s “country of exposure” is determined by PIMCO using certain factors provided by a third-party analytical service provider. The factors are applied in order such that the first factor to result in the assignment of a country determines the “country of exposure.” The factors, listed in the order in which they are applied, are: (i) if an asset-backed or other collateralized security, the country in which the collateral backing the security is located, (ii) if the security is guaranteed by the government of a country (or any political subdivision, agency, authority or instrumentality of such government), the country of the government or instrumentality providing the guarantee, (iii) the “country of risk” of the issuer, (iv) the “country of risk” of the issuer’s ultimate parent, or (v) the country where the issuer is organized or incorporated under the laws thereof. “Country of risk” is a separate four-part test determined by the following factors, listed in order of importance: (i) management location, (ii) country of primary listing, (iii) sales or revenue attributable to the country, and (iv) reporting currency of the issuer. PIMCO has broad discretion to identify countries that it considers to qualify as emerging markets. Emerging market countries are generally located in Asia, Africa, the Middle East, Latin America and Eastern Europe but may be in other regions as well. PIMCO will consider emerging market country and currency composition based on its evaluation of relative interest rates, inflation rates, exchange rates, monetary and fiscal policies, trade and current account balances, legal and political developments and any other specific factors it believes to be relevant.

The securities and currency markets of emerging market countries are generally smaller, less developed, less liquid, and more volatile than the securities and currency markets of the United States and other developed markets and disclosure and regulatory standards in many respects are less stringent. There also may be a lower level of monitoring and regulation of securities markets in emerging market countries and the activities of investors in such markets and enforcement of existing regulations may be extremely limited. Government

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enforcement of existing securities regulations is limited, and any enforcement may be arbitrary and the results may be difficult to predict. In addition, reporting requirements of emerging market countries with respect to the ownership of securities are more likely to be subject to interpretation or changes without prior notice to investors than more developed countries.

Many emerging market countries have experienced substantial, and in some periods extremely high, rates of inflation for many years. Inflation and rapid fluctuations in inflation rates have had and may continue to have negative effects on such countries’ economies and securities markets.

Economies of emerging market countries generally are heavily dependent upon international trade and, accordingly, have been and may continue to be affected adversely by trade barriers, exchange controls, managed adjustments in relative currency values, and other protectionist measures imposed or negotiated by the countries with which they trade. The economies of emerging market countries also have been and may continue to be adversely affected by economic conditions in the countries with which they trade. The economies of emerging market countries may also be predominantly based on only a few industries or dependent on revenues from particular commodities. In addition, custodial services and other investment-related costs may be more expensive in emerging markets than in many developed markets, which could reduce the Fund’s income from securities or debt instruments of emerging market country issuers.

Governments of many emerging market countries have exercised and continue to exercise substantial influence over many aspects of the private sector. In some cases, the government owns or controls many companies, including some of the largest in the country. Accordingly, government actions could have a significant effect on economic conditions in an emerging country and on market conditions, prices and yields of securities in the Fund’s portfolio.

Emerging market countries are more likely than developed market countries to experience political uncertainty and instability, including the risk of war, terrorism, nationalization, limitations on the removal of funds or other assets, or diplomatic developments that affect investments in these countries. No assurance can be given that adverse political changes will not cause the Fund to suffer a loss of any or all of its investments in emerging market countries or interest/dividend income thereon.

Foreign investment in certain emerging market country securities is restricted or controlled to varying degrees. These restrictions or controls may at times limit or preclude foreign investment in certain emerging market country securities and increase the costs and expenses of the Fund. Certain emerging market countries require governmental approval prior to investments by foreign persons, limit the amount of investment by foreign persons in a particular issuer, limit the investment by foreign persons only to a specific class of securities of an issuer that may have less advantageous rights than the classes available for purchase by domiciliaries of the countries and/or impose additional taxes on foreign investors. Certain emerging market countries may also restrict investment opportunities in issuers in industries deemed important to national interests. Emerging market countries may require governmental approval for the repatriation of investment income, capital or the proceeds of sales of securities by foreign investors.

Also, because publicly traded debt instruments of emerging market issuers represent a relatively recent innovation in the world debt markets, there is little historical data or related market experience concerning the attributes of such instruments under all economic, market and political conditions.

As reflected in the above discussion, investments in emerging market securities involve a greater degree of risk than, and special risks in addition to the risks associated with, investments in domestic securities or in securities of foreign developed countries. See “Principal Risks of the Fund—Emerging Markets Risk.”

Foreign Currencies and Related Transactions

The Fund’s Common Shares are priced in U.S. dollars and the distributions paid by the Fund to Common Shareholders are paid in U.S. dollars. However, a significant portion of the Fund’s assets may be denominated in foreign (non-U.S.) currencies and the income received by the Fund from many foreign debt obligations will be paid in foreign currencies. The Fund also may invest in or gain exposure to foreign currencies themselves for

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investment or hedging purposes. The Fund’s investments in securities that trade in, or receive revenues in, foreign currencies will be subject to currency risk, which is the risk that fluctuations in the exchange rates between the U.S. dollar and foreign currencies may negatively affect an investment. See “Principal Risks of the Fund—Foreign Currency Risk.” The Fund may (but is not required to) hedge some or all of its exposure to foreign currencies through the use of derivative strategies. For instance, the Fund may enter into forward foreign currency exchange contracts, and may buy and sell foreign currency futures contracts and options on foreign currencies and foreign currency futures. A forward foreign currency exchange contract, which involves an obligation to purchase or sell a specific currency at a future date at a price set at the time of the contract, may reduce the Fund’s exposure to changes in the value of the currency it will deliver and increase its exposure to changes in the value of the currency it will receive for the duration of the contract. The effect on the value of the Fund is similar to selling securities denominated in one currency and purchasing securities denominated in another currency. Contracts to sell foreign currency would limit any potential gain that might be realized by the Fund if the value of the hedged currency increases. The Fund may enter into these contracts to hedge against foreign exchange risk arising from the Fund’s investment or anticipated investment in securities denominated in foreign currencies. Suitable hedging transactions may not be available in all circumstances and there can be no assurance that the Fund will engage in such transactions at any given time or from time to time when they would be beneficial. Although PIMCO has the flexibility to engage in such transactions for the Fund, it may determine not to do so or to do so only in unusual circumstances or market conditions. Also, these transactions may not be successful and may eliminate any chance for the Fund to benefit from favorable fluctuations in relevant foreign currencies.

The Fund may also use derivatives contracts for purposes of increasing exposure to a foreign currency or to shift exposure to foreign currency fluctuations from one currency to another. To the extent that it does so, the Fund will be subject to the additional risk that the relative value of currencies will be different than anticipated by PIMCO.

Please see “Investment Objectives and Policies—Non-U.S. Securities,” “Investment Objectives and Policies—Foreign Currency Transactions” and “Investment Objectives and Policies—Foreign Currency Exchange-Related Securities” in the Statement of Additional Information for a more detailed description of the types of foreign investments and foreign currency transactions in which the Fund may invest or engage and their related risks.

Mortgage-Related and Other Asset-Backed Securities

The Fund may invest in a variety of mortgage-related and other asset-backed securities issued by government agencies or other governmental entities or by private originators or issuers.

As a matter of fundamental policy, the Fund will normally invest at least 25% of its total assets in privately-issued (commonly known as “non-agency”) mortgage-related securities.

Mortgage-related securities include mortgage pass-through securities, collateralized mortgage obligations (“CMOs”), commercial mortgage-backed securities (“CMBSs”), mortgage dollar rolls, CMO residuals, adjustable rate mortgage-backed securities (“ARMs”), stripped mortgage-backed securities (“SMBSs”) and other securities that directly or indirectly represent a participation in, or are secured by and payable from, mortgage loans on real property.

Mortgage Pass-Through Securities.     Interests in pools of mortgage-related securities differ from other forms of debt securities, which normally provide for periodic payment of interest in fixed amounts with principal payments at maturity or specified call dates. Instead, these securities provide a monthly payment which consists of both interest and principal payments. In effect, these payments are a “pass through” of the monthly payments made by the individual borrowers on their residential or commercial mortgage loans, net of any fees paid to the issuer or guarantor of such securities. Additional payments are caused by repayments of principal resulting from the sale of the underlying property, refinancing or foreclosure, net of fees or costs that may be incurred. Some mortgage-related securities (such as securities issued by the Government National Mortgage Association (“GNMA”)) are described as “modified pass-through.” These securities entitle the holder to receive all interest

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and principal payments owed on the mortgage pool, net of certain fees, at the scheduled payment dates regardless of whether or not the mortgagor actually makes the payment.

The rate of pre-payments on underlying mortgages will affect the price and volatility of a mortgage-related security, and may have the effect of shortening or extending the effective duration of the security relative to what was anticipated at the time of purchase. To the extent that unanticipated rates of prepayment on underlying mortgages increase the effective duration of a mortgage-related security, the volatility of such security can be expected to increase. The mortgage market in the United States has experienced heightened difficulties over the past several years that may adversely affect the performance and market value of mortgage-related investments. Delinquencies and losses on residential and commercial mortgage loans (especially subprime and second-lien residential mortgage loans) generally have increased recently and may continue to increase, and a decline in or flattening of property values (as has recently been experienced and may continue to be experienced in many markets) may exacerbate such delinquencies and losses. Borrowers with adjustable-rate mortgage loans are more sensitive to changes in interest rates, which affect their monthly mortgage payments, and may be unable to secure replacement mortgages at comparably low interest rates. Also, a number of residential mortgage loan originators have recently experienced serious financial difficulties or bankruptcy. Owing largely to the foregoing, reduced investor demand for mortgage loans and mortgage-related securities and increased investor yield requirements have caused limited liquidity in the secondary market for mortgage-related securities, which can adversely affect the market value of mortgage-related securities. It is possible that such limited liquidity in such secondary markets could continue or worsen.

The principal U.S. governmental guarantor of mortgage-related securities is GNMA. GNMA is a wholly owned U.S. Government corporation within the Department of Housing and Urban Development. GNMA is authorized to guarantee, with the full faith and credit of the U.S. Government, the timely payment of principal and interest on securities issued by institutions approved by GNMA (such as savings and loan institutions, commercial banks and mortgage bankers) and backed by pools of mortgages insured by the Federal Housing Administration (the “FHA”), or guaranteed by the Department of Veterans Affairs (the “VA”). Government-related guarantors ( i.e. , not backed by the full faith and credit of the U.S. Government) include the Federal National Mortgage Association (“FNMA”) and the Federal Home Loan Mortgage Corporation (“FHLMC”). FNMA is a government-sponsored corporation the common stock of which is owned entirely by private stockholders. FNMA purchases conventional ( i.e. , not insured or guaranteed by any government agency) residential mortgages from a list of approved seller/servicers which include state and federally chartered savings and loan associations, mutual savings banks, commercial banks and credit unions and mortgage bankers. Pass-through securities issued by FNMA are guaranteed as to timely payment of principal and interest by FNMA, but are not backed by the full faith and credit of the U.S. Government. FHLMC was created by Congress in 1970 for the purpose of increasing the availability of mortgage credit for residential housing. It is a government-sponsored corporation that issues Participation Certificates (“PCs”), which are pass-through securities, each representing an undivided interest in a pool of residential mortgages. FHLMC guarantees the timely payment of interest and ultimate collection of principal, but PCs are not backed by the full faith and credit of the U.S. Government.

On September 6, 2008, the Federal Housing Finance Agency (“FHFA”) placed FNMA and FHLMC into conservatorship. As the conservator, FHFA succeeded to all rights, titles, powers and privileges of FNMA and FHLMC and of any stockholder, officer or director of FNMA and FHLMC with respect to FNMA and FHLMC and the assets of FNMA and FHLMC. FHFA selected a new chief executive officer and chairman of the board of directors for each of FNMA and FHLMC. In connection with the conservatorship, the U.S. Treasury entered into a Senior Preferred Stock Purchase Agreement with each of FNMA and FHLMC pursuant to which the U.S. Treasury will purchase up to an aggregate of $100 billion of each of FNMA and FHLMC to maintain a positive net worth in each enterprise. This agreement contains various covenants that severely limit each enterprise’s operations. In exchange for entering into these agreements, the U.S. Treasury received $1 billion of each enterprise’s senior preferred stock and warrants to purchase 79.9% of each enterprise’s common stock. On February 18, 2009, the U.S. Treasury announced that it was doubling the size of its commitment to each enterprise under the Senior Preferred Stock Program to $200 billion. The U.S. Treasury’s obligations under the Senior Preferred Stock Program are for an indefinite period of time for a maximum amount of $200 billion per

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enterprise. On December 24, 2009, the U.S. Treasury announced further amendments to the Senior Preferred Stock Purchase Agreements which included additional financial support to certain governmentally supported entities, including the Federal Home Loan Banks (“FHLBs”), FNMA and FHLMC, there is no assurance that the obligations of such entities will be satisfied in full, or that such obligations will not decrease in value or default. It is difficult, if not impossible, to predict the future political, regulatory or economic changes that could impact the FNMA, FHLMC and the FHLBs, and the values of their related securities or obligations.

FNMA and FHLMC are continuing to operate as going concerns while in conservatorship and each remain liable for all of its obligations, including its guaranty obligations, associated with its mortgage-backed securities.

Under the Federal Housing Finance Regulatory Reform Act of 2008 (the “Reform Act”), which was included as part of the Housing and Economic Recovery Act of 2008, FHFA, as conservator or receiver, has the power to repudiate any contract entered into by FNMA or FHLMC prior to FHFA’s appointment as conservator or receiver, as applicable, if FHFA determines, in its sole discretion, that performance of the contract is burdensome and that repudiation of the contract promotes the orderly administration of FNMA’s or FHLMC’s affairs. The Reform Act requires FHFA to exercise its right to repudiate any contract within a reasonable period of time after its appointment as conservator or receiver. FHFA, in its capacity as conservator, has indicated that it has no intention to repudiate the guaranty obligations of FNMA or FHLMC because FHFA views repudiation as incompatible with the goals of the conservatorship. However, in the event that FHFA, as conservator or if it is later appointed as receiver for FNMA or FHLMC, were to repudiate any such guaranty obligation, the conservatorship or receivership estate, as applicable, would be liable for actual direct compensatory damages in accordance with the provisions of the Reform Act. Any such liability could be satisfied only to the extent of FNMA’s or FHLMC’s assets available therefor. In the event of repudiation, the payments of interest to holders of FNMA or FHLMC mortgage-backed securities would be reduced if payments on the mortgage loans represented in the mortgage loan groups related to such mortgage-backed securities are not made by the borrowers or advanced by the servicer. Any actual direct compensatory damages for repudiating these guaranty obligations may not be sufficient to offset any shortfalls experienced by such mortgage-backed security holders. Further, in its capacity as conservator or receiver, FHFA has the right to transfer or sell any asset or liability of FNMA or FHLMC without any approval, assignment or consent. Although FHFA has stated that it has no present intention to do so, if FHFA, as conservator or receiver, were to transfer any such guaranty obligation to another party, holders of FNMA or FHLMC mortgage-backed securities would have to rely on that party for satisfaction of the guaranty obligation and would be exposed to the credit risk of that party. In addition, certain rights provided to holders of mortgage-backed securities issued by FNMA and FHLMC under the operative documents related to such securities may not be enforced against FHFA, or enforcement of such rights may be delayed, during the conservatorship or any future receivership. The operative documents for FNMA and FHLMC mortgage-backed securities may provide (or with respect to securities issued prior to the date of the appointment of the conservator may have provided) that upon the occurrence of an event of default on the part of FNMA or FHLMC, in its capacity as guarantor, which includes the appointment of a conservator or receiver, holders of such mortgage-backed securities have the right to replace FNMA or FHLMC as trustee if the requisite percentage of mortgage-backed securities holders consent. The Reform Act prevents mortgage-backed security holders from enforcing such rights if the event of default arises solely because a conservator or receiver has been appointed. The Reform Act also provides that no person may exercise any right or power to terminate, accelerate or declare an event of default under certain contracts to which FNMA or FHLMC is a party, or obtain possession of or exercise control over any property of FNMA or FHLMC, or affect any contractual rights of FNMA or FHLMC, without the approval of FHFA, as conservator or receiver, for a period of 45 or 90 days following the appointment of FHFA as conservator or receiver, respectively.

In addition, in a February 2011 report to Congress from the Treasury Department and the Department of Housing and Urban Development, the Obama administration provided a plan to reform America’s housing finance market. The plan would reduce the role of and eventually eliminate FNMA and FHLMC. Notably, the plan does not propose similar significant changes to GNMA, which guarantees payments on mortgage-related securities backed by federally insured or guaranteed loans such as those issued by the Federal Housing Association or guaranteed by the Department of Veterans Affairs. The report also identified three proposals for

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Congress and the administration to consider for the long-term structure of the housing finance markets after the elimination of FNMA and FHLMC, including implementing: (i) a privatized system of housing finance that limits government insurance to very limited groups of creditworthy low- and moderate-income borrowers; (ii) a privatized system with a government backstop mechanism that would allow the government to insure a larger share of the housing finance market during a future housing crisis; and (iii) a privatized system where the government would offer reinsurance to holders of certain highly-rated mortgage-related securities insured by private insurers and would pay out under the reinsurance arrangements only if the private mortgage insurers were insolvent.

Commercial banks, savings and loan institutions, private mortgage insurance companies, mortgage bankers and other secondary market issuers also create pass-through pools of conventional residential mortgage loans. Such issuers may be the originators and/or servicers of the underlying mortgage loans as well as the guarantors of the mortgage-related securities. Pools created by such non-governmental issuers generally offer a higher rate of interest than government and government-related pools because there are no direct or indirect government or agency guarantees of payments in the former pools. However, timely payment of interest and principal of these pools may be supported by various forms of insurance or guarantees, including individual loan, title, pool and hazard insurance and letters of credit, which may be issued by governmental entities or private insurers. Such insurance and guarantees and the creditworthiness of the issuers thereof will be considered in determining whether a mortgage-related security should be purchased for the Fund. There can be no assurance that the private insurers or guarantors can meet their obligations under the insurance policies or guarantee arrangements. The Fund may, however, invest in mortgage-related securities without insurance or guarantees if PIMCO believes that the securities will help to achieve the Fund’s investment objectives. Securities issued by certain private organizations may not be readily marketable.

Collateralized Mortgage Obligations.     A CMO is a debt obligation of a legal entity that is collateralized by mortgages and divided into classes. Similar to a bond, interest and prepaid principal is paid, in most cases, on a monthly basis. CMOs may be collateralized by whole mortgage loans or private mortgage bonds, but are generally collateralized by portfolios of mortgage pass-through securities guaranteed by GNMA, FHLMC or FNMA and their income streams. CMOs are structured into multiple classes, often referred to as “tranches,” with each class bearing a different stated maturity and entitled to a different schedule for payments of principal and interest, including prepayments. Actual maturity and average life will depend upon the pre-payment experience of the collateral. In the case of certain CMOs (known as “sequential pay” CMOs), payments of principal received from the pool of underlying mortgages, including prepayments, are applied to the classes of CMOs in the order of their respective final distribution dates. Thus, no payment of principal will be made to any class of sequential pay CMOs until all other classes having an earlier final distribution date have been paid in full. CMOs may be less liquid and may exhibit greater price volatility than other types of mortgage- or asset-backed securities.

Commercial Mortgage-Backed Securities.     CMBSs include securities that reflect an interest in, and are secured by, mortgage loans on commercial real property. Many of the risks of investing in commercial mortgage-backed securities reflect the risks of investing in the real estate securing the underlying mortgage loans. These risks reflect the effects of local and other economic conditions on real estate markets, the ability of tenants to make loan payments and the ability of a property to attract and retain tenants. Commercial mortgage-backed securities may be less liquid and exhibit greater price volatility than other types of mortgage- or asset-backed securities.

CMO Residuals.     CMO residuals are mortgage securities issued by agencies or instrumentalities of the U.S. Government or by private originators of, or investors in, mortgage loans, including savings and loan associations, homebuilders, mortgage banks, commercial banks, investment banks and special purpose entities of the foregoing. The cash flow generated by the mortgage assets underlying a series of a CMO is applied first to make required payments of principal and interest on the CMO and second to pay the related administrative expenses and any management fee of the issuer. The residual in a CMO structure generally represents the interest in any excess cash flow remaining after making the foregoing payments. Each payment of such excess cash flow to a holder of the related CMO residual represents income and/or a return of capital. The amount of residual cash

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flow resulting from a CMO will depend on, among other things, the characteristics of the mortgage assets, the coupon rate of each class of CMO, prevailing interest rates, the amount of administrative expenses and the prepayment experience on the mortgage assets. In particular, the yield to maturity on CMO residuals is extremely sensitive to prepayments on the related underlying mortgage assets, in the same manner as an interest-only (“IO”) class of stripped mortgage-backed securities (described below). In addition, if a series of a CMO includes a class that bears interest at an adjustable rate, the yield to maturity on the related CMO residual will also be extremely sensitive to changes in the level of the index upon which interest rate adjustments are based. As described below with respect to stripped mortgage-backed securities, in certain circumstances the Fund may fail to recoup fully its initial investment in a CMO residual. CMO residuals are generally purchased and sold by institutional investors through several investment banking firms acting as brokers or dealers. CMO residuals may, or pursuant to an exemption therefrom, may not, have been registered under the Securities Act. CMO residuals, whether or not registered under the Securities Act, may be subject to certain restrictions on transferability.

Adjustable Rate Mortgage-Backed Securities.     ARMs have interest rates that reset at periodic intervals. Acquiring ARMs permits the Fund to participate in increases in prevailing current interest rates through periodic adjustments in the coupons of mortgages underlying the pool on which ARMs are based. Such ARMs generally have higher current yield and lower price fluctuations than is the case with more traditional fixed income debt securities of comparable rating and maturity. In addition, when prepayments of principal are made on the underlying mortgages during periods of rising interest rates, the Fund can reinvest the proceeds of such prepayments at rates higher than those at which they were previously invested. Mortgages underlying most ARMs, however, have limits on the allowable annual or lifetime increases that can be made in the interest rate that the mortgagor pays. Therefore, if current interest rates rise above such limits over the period of the limitation, the Fund, when holding an ARM, does not benefit from further increases in interest rates. Moreover, when interest rates are in excess of coupon rates ( i.e. , the rates being paid by mortgagors) of the mortgages, ARMs behave more like fixed income securities and less like adjustable-rate securities and are subject to the risks associated with fixed income securities. In addition, during periods of rising interest rates, increases in the coupon rate of adjustable-rate mortgages generally lag current market interest rates slightly, thereby creating the potential for capital depreciation on such securities.

Stripped Mortgage-Backed Securities.     SMBSs are derivative multi-class mortgage securities. SMBSs may be issued by agencies or instrumentalities of the U.S. Government, or by private originators of, or investors in, mortgage loans, including savings and loan associations, mortgage banks, commercial banks, investment banks and special purpose entities of the foregoing. SMBSs are usually structured with two classes that receive different proportions of the interest and principal distributions on a pool of mortgage assets. A common type of SMBS will have one class receiving some of the interest and most of the principal from the mortgage assets, while the other class will receive most of the interest and the remainder of the principal. In the most extreme case, one class will receive all of the interest (the “IO” class), while the other class will receive all of the principal (the principal-only or “PO” class). The yield to maturity on an IO class is extremely sensitive to the rate of principal payments (including prepayments) on the related underlying mortgage assets, and a rapid rate of principal payments may have a material adverse effect on the Fund’s yield to maturity from these securities. If the underlying mortgage assets experience greater than anticipated prepayments of principal, the Fund may fail to recoup some or all of its initial investment in these securities even if the security is in one of the highest rating categories.

Collateralized Debt Obligations.     The Fund may invest in collateralized debt obligations (“CDOs”), which include collateralized bond obligations (“CBOs”), collateralized loan obligations (“CLOs”) and other similarly structured securities. CBOs and CLOs are types of asset-backed securities. A CBO is a trust which is often backed by a diversified pool of high risk, below investment grade fixed income securities. The collateral can be from many different types of fixed-income securities such as high-yield debt, residential privately-issued mortgage-related securities, commercial privately-issued mortgage-related securities, trust preferred securities and emerging market debt. A CLO is a trust typically collateralized by a pool of loans, which may include, among others, domestic and foreign senior secured loans, senior unsecured loans and subordinate corporate

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loans, including loans that may be rated below investment grade or equivalent unrated loans. CDOs may charge management fees and administrative expenses. For both CBOs and CLOs, the cash flows from the trust are split into two or more portions, called tranches, varying in risk and yield. The riskiest portion is the “equity” tranche which bears the bulk of defaults from the bonds or loans in the trust and serves to protect the other, more senior tranches from default in all but the most severe circumstances. Since it is partially protected from defaults, a senior tranche from a CBO trust or CLO trust typically has higher ratings and lower yields than the underlying securities, and can be rated investment grade. Despite the protection from the equity tranche, CBO or CLO tranches can experience substantial losses due to actual defaults, increased sensitivity to defaults due to collateral default and disappearance of protecting tranches, market anticipation of defaults and aversion to CBO or CLO securities as a class. The risks of an investment in a CDO depend largely on the type of the collateral securities and the class of the CDO in which the Fund invests. Normally, CBOs, CLOs and other CDOs are privately offered and sold, and thus are not registered under the securities laws. As a result, investments in CDOs may be characterized by the Fund as illiquid securities; however, an active dealer market may exist for CDOs allowing a CDO to qualify under Rule 144A under the Securities Act. In addition to the normal risks associated with debt instruments discussed elsewhere in this prospectus and in the Statement of Additional Information ( e.g. , interest rate risk and default risk), CDOs carry additional risks including, but not limited to: (i) the possibility that distributions from collateral securities will not be adequate to make interest or other payments; (ii) the quality of the collateral may decline in value or default; (iii) the Fund may invest in CDOs that are subordinate to other classes; and (iv) the complex structure of the security may not be fully understood at the time of investment and may produce disputes with the issuer or unexpected investment results.

Asset-Backed Securities.     Asset-backed securities (“ABS”) are bonds backed by pools of loans or other receivables. ABS are created from many types of assets, including auto loans, credit card receivables, home equity loans and student loans. ABS are typically issued through special purpose vehicles that are bankruptcy remote from the issuer of the collateral. The credit quality of an ABS transaction depends on the performance of the underlying assets. To protect ABS investors from the possibility that some borrowers could miss payments or even default on their loans, ABS include various forms of credit enhancement. Some ABS, particularly home equity loan ABS, are subject to interest rate risk and prepayment risk. A change in interest can affect the pace of payments on the underlying loans, which in turn affects total return on the securities. ABS also carry credit or default risk. If many borrowers on the underlying loans default, losses could exceed the credit enhancement level and result in losses to investors in an ABS. In addition, ABS have structural risk due to a unique characteristic known as early amortization, or early payout, risk. Built into the structure of most ABS are triggers for early payout, designed to protect investors from losses. These triggers are unique to each transaction and can include: a big rise in defaults on the underlying loans, a sharp drop in the credit enhancement level or even the bankruptcy of the originator. Once early amortization begins, all incoming loan payments (after expenses are paid) are used to pay investors as quickly as possible based upon a predetermined priority of payment.

Please see “Investment Objectives and Policies—Mortgage-Related and Other Asset-Backed Securities” in the Statement of Additional Information and “Principal Risks of the Fund—Mortgage-Related and Asset-Backed Securities Risk” in this prospectus for a more detailed description of the types of mortgage-related and other asset-backed securities in which the Fund may invest and their related risks.

Municipal Bonds

Municipal bonds share the attributes of debt/fixed income securities in general, but are generally issued by states, municipalities and other political subdivisions, agencies, authorities and instrumentalities of states and multi-state agencies or authorities, and may be either taxable or tax-exempt instruments. The municipal bonds that the Fund may purchase include without limitation general obligation bonds and limited obligation bonds (or revenue bonds), including industrial development bonds issued pursuant to former federal tax law. General obligation bonds are obligations involving the credit of an issuer possessing taxing power and are payable from such issuer’s general revenues and not from any particular source. Limited obligation bonds are payable only from the revenues derived from a particular facility or class of facilities or, in some cases, from the proceeds of a special excise or other specific revenue source. Tax exempt private activity bonds and industrial development

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bonds generally are also limited obligation bonds and thus are not payable from the issuer’s general revenues. The credit and quality of private activity bonds and industrial development bonds are usually related to the credit of the corporate user of the facilities. Payment of interest on and repayment of principal of such bonds is the responsibility of the corporate user (and/or any guarantor).

The Fund may invest in Build America Bonds, which are tax credit bonds created by the American Recovery and Reinvestment Act of 2009, which authorizes state and local governments to issue Build America Bonds as taxable bonds in 2009 and 2010, without volume limitations, to finance any capital expenditures for which such issuers could otherwise issue traditional tax-exempt bonds. State and local governments may receive a direct federal subsidy payment for a portion of their borrowing costs on Build America Bonds equal to 35% of the total coupon interest paid to investors. The state or local government issuer can elect to either take the federal subsidy or pass the 35% tax credit along to bondholders. The Fund’s investments in Build America Bonds will result in taxable income and the Fund may elect to pass through to shareholders the corresponding tax credits. The tax credits can generally be used to offset federal income taxes and the alternative minimum tax, but such credits are generally not refundable. Build America Bonds involve similar risks as municipal bonds, including credit and market risk. They are intended to assist state and local governments in financing capital projects at lower borrowing costs and are likely to attract a broader group of investors than tax-exempt municipal bonds. For example, taxable funds, such as the Fund, may choose to invest in Build America Bonds. Although Build America Bonds were only authorized for issuance during 2009 and 2010, the program may have resulted in reduced issuance of tax-exempt municipal bonds during the same period. The Build America Bond program expired on December 31, 2010, at which point no further issuance of new Build America Bonds was permitted. As of the date of this prospectus, there is no indication that Congress will renew the program to permit issuance of new Build America Bonds.

The Fund may invest in pre-refunded municipal bonds. Pre-refunded municipal bonds are tax-exempt bonds that have been refunded to a call date prior to the final maturity of principal, or, in the case of pre-refunded municipal bonds commonly referred to as “escrowed-to-maturity bonds,” to the final maturity of principal, and remain outstanding in the municipal market. The payment of principal and interest of the pre-refunded municipal bonds held by the Fund is funded from securities in a designated escrow account that holds U.S. Treasury securities or other obligations of the U.S. Government (including its agencies and instrumentalities (“Agency Securities”)). While still tax-exempt, pre-refunded municipal bonds usually will bear an AAA/Aaa rating (if a re-rating has been requested and paid for) because they are backed by U.S. Treasury securities or Agency Securities. Because the payment of principal and interest is generated from securities held in an escrow account established by the municipality and an independent escrow agent, the pledge of the municipality has been fulfilled and the original pledge of revenue by the municipality is no longer in place. The escrow account securities pledged to pay the principal and interest of the pre-refunded municipal bond do not guarantee the price movement of the bond before maturity. Issuers of municipal bonds refund in advance of maturity the outstanding higher cost debt and issue new, lower cost debt, placing the proceeds of the lower cost issuance into an escrow account to pre-refund the older, higher cost debt. Investment in pre-refunded municipal bonds held by the Fund may subject the Fund to interest rate risk and market risk. In addition, while a secondary market exists for pre-refunded municipal bonds, if the Fund sells pre-refunded municipal bonds prior to maturity, the price received may be more or less than the original cost, depending on market conditions at the time of sale.

The Fund may invest in municipal lease obligations. A lease is not a full faith and credit obligation of the issuer and is usually backed only by the borrowing government’s unsecured pledge to make annual appropriations for lease payments. There have been challenges to the legality of lease financing in numerous states, and, from time to time, certain municipalities have considered not appropriating money for lease payments. In deciding whether to purchase a lease obligation for the Fund, PIMCO will assess the financial condition of the borrower, the merits of the project, the level of public support for the project and the legislative history of lease financing in the state. These securities may be less readily marketable than other municipal securities.

Some longer-term municipal bonds give the investor the right to “put” or sell the security at par (face value) within a specified number of days following the investor’s request—usually one to seven days. This demand

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feature enhances a security’s liquidity by shortening its effective maturity and enables it to trade at a price equal to or very close to par. If a demand feature terminates prior to being exercised, the Fund would hold the longer-term security, which could experience substantially more volatility.

The Fund may invest in municipal warrants, which are essentially call options on municipal bonds. In exchange for a premium, municipal warrants give the purchaser the right, but not the obligation, to purchase a municipal bond in the future. The Fund may purchase a warrant to lock in forward supply in an environment in which the current issuance of bonds is sharply reduced. Like options, warrants may expire worthless and may have reduced liquidity.

The Fund may invest in municipal bonds with credit enhancements such as letters of credit, municipal bond insurance and standby bond purchase agreements (“SBPAs”). Letters of credit are issued by a third party, usually a bank, to enhance liquidity and to ensure repayment of principal and any accrued interest if the underlying municipal bond should default. Municipal bond insurance, which is usually purchased by the bond issuer from a private, nongovernmental insurance company, provides an unconditional and irrevocable guarantee that the insured bond’s principal and interest will be paid when due. Insurance does not guarantee the price of the bond. The credit rating of an insured bond reflects the credit rating of the insurer, based on its claims-paying ability. The obligation of a municipal bond insurance company to pay a claim extends over the life of each insured bond. Although defaults on insured municipal bonds have been low to date and municipal bond insurers have met their claims, there is no assurance that this will continue. A higher-than expected default rate could strain the insurer’s loss reserves and adversely affect its ability to pay claims to bondholders. Because a significant portion of insured municipal bonds that have been issued and are outstanding is insured by a small number of insurance companies, not all of which have the highest credit rating, an event involving one or more of these insurance companies, such as a credit rating downgrade, could have a significant adverse effect on the value of the municipal bonds insured by such insurance company or companies and on the municipal bond markets as a whole. An SBPA is a liquidity facility provided to pay the purchase price of bonds that cannot be re-marketed. The obligation of the liquidity provider (usually a bank) is only to advance funds to purchase tendered bonds that cannot be re-marketed and does not cover principal or interest under any other circumstances. The liquidity provider’s obligations under the SBPA are usually subject to numerous conditions, including the continued creditworthiness of the underlying borrower.

Bank Loans

The Fund may normally invest up to 40% of its total assets in bank loans, which include fixed- and floating-rate loans issued by banks (including, among others, interests in senior floating rate loans made to or issued by U.S. or non-U.S. banks or other corporations (“Senior Loans”), delayed funding loans and revolving credit facilities). Bank loans may also take the form of direct interests acquired during a primary distribution or the form of assignments of, novations of or participations in a bank loan acquired in secondary markets. The Fund may also gain exposure to bank loans and related investments through the use of total return swaps and/or other derivative instruments.

As noted, the Fund may purchase or gain economic exposure to “assignments” of bank loans from lenders. The purchaser of an assignment typically succeeds to all the rights and obligations under the loan agreement with the same rights and obligations as the assigning lender. Assignments may, however, be arranged through private negotiations between potential assignees and potential assignors, and the rights and obligations acquired by the purchaser of an assignment may differ from, and be more limited than, those held by the assigning lender.

The Fund also may invest in “participations” in bank loans. Participations by the Fund in a lender’s portion of a bank loan typically will result in the Fund having a contractual relationship only with such lender, not with the borrower. As a result, the Fund may have the right to receive payments of principal, interest and any fees to which it is entitled only from the lender selling the participation and only upon receipt by such lender of such payments from the borrower. In connection with purchasing participations, the Fund generally will have no right to enforce compliance by the borrower with the terms of the loan agreement, nor any rights with respect to any funds acquired by other lenders through set-off against the borrower, and the Fund may not directly benefit from

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any collateral supporting the loan in which it has purchased the participation. As a result, the Fund may assume the credit risk of both the borrower and the lender selling the participation.

Among the types of bank loan investments that the Fund may make are interests in Senior Loans. Senior Loans typically pay interest at rates that are re-determined periodically on the basis of a floating base lending rate (such as LIBOR) plus a premium. Senior Loans are typically of below investment grade quality. Senior Loans may hold a senior position in the capital structure of a borrower and are often secured with collateral. A Senior Loan is typically originated, negotiated and structured by a U.S. or foreign commercial bank, insurance company, finance company or other financial institution (the “Agent”) for a lending syndicate of financial institutions (“Lenders”). The Agent typically administers and enforces the Senior Loan on behalf of the other Lenders in the syndicate. In addition, an institution, typically but not always the Agent, holds any collateral on behalf of the Lenders. A financial institution’s employment as an Agent might be terminated in the event that it fails to observe a requisite standard of care or becomes insolvent. A successor Agent would generally be appointed to replace the terminated Agent, and assets held by the Agent under the loan agreement would likely remain available to holders of such indebtedness. However, if assets held by the Agent for the benefit of the Fund were determined to be subject to the claims of the Agent’s general creditors, the Fund might incur certain costs and delays in realizing payment on a loan or loan participation and could suffer a loss of principal and/or interest. In situations involving other interposed financial institutions ( e.g. , an insurance company or government agency) similar risks may arise.

Purchasers of Senior Loans and other forms of direct indebtedness depend primarily upon the creditworthiness of the corporate or other borrower for payment of principal and interest. If the Fund does not receive scheduled interest or principal payments on such indebtedness, the net asset value, market price and/or yield of the Common Shares could be adversely affected. Senior Loans that are fully secured may offer the Fund more protection than an unsecured loan in the event of non-payment of scheduled interest or principal. However, there is no assurance that the liquidation of any collateral from a secured Senior Loan would satisfy the borrower’s obligation, or that such collateral could be liquidated. Also, the Fund may invest in or gain economic exposure to Senior Loans that are unsecured.

Senior Loans and interests in other bank loans may not be readily marketable and may be subject to restrictions on resale. In some cases, negotiations involved in disposing of indebtedness may require weeks to complete. Consequently, some indebtedness may be difficult or impossible to dispose of readily at what PIMCO believes to be a fair price.

Senior Loans usually require, in addition to scheduled payments of interest and principal, the prepayment of the Senior Loan from free cash flow. The degree to which borrowers prepay Senior Loans, whether as a contractual requirement or at their election, may be affected by general business conditions, the financial condition of the borrower and competitive conditions among lenders, among others. As such, prepayments cannot be predicted with accuracy. Upon a prepayment, either in part or in full, the actual outstanding debt on which the Fund derives interest income will be reduced. However, the Fund may receive both a prepayment penalty fee from the prepaying borrower and a facility fee upon the purchase of a new Senior Loan with the proceeds from the prepayment of the former. The effect of prepayments on the Fund’s performance may be mitigated by the receipt of prepayment fees and the Fund’s ability to reinvest prepayments in other Senior Loans that have similar or identical yields.

Economic exposure to loan interests through the use of derivative transactions, including, among others, total return swaps, generally involves greater risks than if the Fund had invested in the loan interest directly during a primary distribution or through assignments of, novations of or participations in a bank loan acquired in secondary markets since, in addition to the risks described above, certain derivative transactions may be subject to leverage risk and greater illiquidity risk, counterparty risk, valuation risk and other risks. See “Principal Risks of the Fund—Derivatives Risk” for more information on these risks.

Delayed Funding Loans and Revolving Credit Facilities

As noted above under “—Bank Loans,” the Fund may enter into, or acquire participations in, delayed funding loans and revolving credit facilities, in which a bank or other lender agrees to make loans up to a

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maximum amount upon demand by the borrower during a specified term. These commitments may have the effect of requiring the Fund to increase its investment in a company at a time when it might not be desirable to do so (including at a time when the company’s financial condition makes it unlikely that such amounts will be repaid). Delayed funding loans and revolving credit facilities are subject to credit, interest rate and liquidity risk and the risks of being a lender.

Bonds

The Fund may invest in a wide variety of bonds of varying maturities issued by non-U.S. (foreign) and U.S. corporations and other business entities, governments and quasi-governmental entities and municipalities and other issuers. Bonds may include, among other things, fixed or variable/floating-rate debt obligations, including bills, notes, debentures, money market instruments and similar instruments and securities. Bonds generally are used by corporations as well as governments and other issuers to borrow money from investors. The issuer pays the investor a fixed or variable rate of interest and normally must repay the amount borrowed on or before maturity. Certain bonds are “perpetual” in that they have no maturity date.

Preferred Securities

Preferred securities represent an equity interest in a company that generally entitles the holder to receive, in preference to the holders of other stocks such as common stocks, dividends and a fixed share of the proceeds resulting from liquidation of the company. Unlike common stocks, preferred stocks usually do not have voting rights. Preferred stocks in some instances are convertible into common stock. Some preferred stocks also entitle their holders to receive additional liquidation proceeds on the same basis as holders of a company’s common stock, and thus also represent an ownership interest in the company. Some preferred stocks offer a fixed rate of return with no maturity date. Because they never mature, these preferred stocks may act like long-term bonds, can be more volatile than other types of preferred stocks and may have heightened sensitivity to changes in interest rates. Other preferred stocks have a variable dividend, generally determined on a quarterly or other periodic basis, either according to a formula based upon a specified premium or discount to the yield on particular U.S. Treasury securities or based on an auction process, involving bids submitted by holders and prospective purchasers of such stocks. Although they are equity securities, preferred securities have certain characteristics of both debt securities and common stock. They are like debt securities in that their stated income is generally contractually fixed. They are like common stocks in that they do not have rights to precipitate bankruptcy proceedings or collection activities in the event of missed payments. Furthermore, preferred securities have many of the key characteristics of equity due to their subordinated position in an issuer’s capital structure and because their quality and value are heavily dependent on the profitability of the issuer rather than on any legal claims to specific assets or cash flows. Because preferred securities represent an equity ownership interest in a company, their value usually will react more strongly than bonds and other debt instruments to actual or perceived changes in a company’s financial condition or prospects, or to fluctuations in the equity markets.

In order to be payable, dividends on preferred securities must be declared by the issuer’s board of directors. In addition, distributions on preferred securities may be subject to deferral and thus may not be automatically payable. Income payments on some preferred securities are cumulative, causing dividends and distributions to accrue even if they are not declared by the board of directors of the issuer or otherwise made payable. Other preferred securities are non-cumulative, meaning that skipped dividends and distributions do not continue to accrue. There is no assurance that dividends on preferred securities in which the Fund invests will be declared or otherwise made payable.

Preferred securities have a liquidation value that generally equals their original purchase price at the date of issuance. The market values of preferred securities may be affected by favorable and unfavorable changes affecting the issuers’ industries or sectors. They also may be affected by actual and anticipated changes or ambiguities in the tax status of the security and by actual and anticipated changes or ambiguities in tax laws, such as changes in corporate and individual income tax rates or the characterization of dividends as tax-advantaged. The dividends paid on the preferred securities in which the Fund may invest might not be eligible for tax-advantaged “qualified dividend” treatment. See “Tax Matters.” Because the claim on an issuer’s earnings

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represented by preferred securities may become disproportionately large when interest rates fall below the rate payable on the securities or for other reasons, the issuer may redeem preferred securities, generally after an initial period of call protection in which the security is not redeemable. Thus, in declining interest rate environments in particular, the Fund’s holdings of higher dividend-paying preferred securities may be reduced and the Fund may be unable to acquire securities paying comparable rates with the redemption proceeds.

Convertible Securities and Synthetic Convertible Securities

The Fund will not normally invest more than 10% of its total assets in convertible debt securities ( i.e. , debt securities that may be converted at either a stated price or stated rate into underlying shares of common stock), including synthetic convertible debt securities ( i.e. , instruments created through a combination of separate securities that possess the two principal characteristics of a traditional convertible security, i.e. , an income-producing security (“income-producing component”) and the right to acquire an equity security (“convertible component”)). Convertible securities have general characteristics similar to both debt securities and equity securities. Although to a lesser extent than with debt obligations, the market value of convertible securities tends to decline as interest rates increase and, conversely, tends to increase as interest rates decline. In addition, because of the conversion feature, the market value of convertible securities tends to vary with fluctuations in the market value of the underlying common stocks and, therefore, also will react to variations in the general market for equity securities.

Convertible securities are investments that provide for a stable stream of income with generally higher yields than common stocks. There can be no assurance of current income because the issuers of the convertible securities may default on their obligations. Convertible securities, however, generally offer lower interest or dividend yields than non-convertible debt securities of similar credit quality because of the potential for equity-related capital appreciation. A convertible security, in addition to providing current income, offers the potential for capital appreciation through the conversion feature, which enables the holder to benefit from increases in the market price of the underlying common stock.

The Fund may invest in synthetic convertible securities, which are created through a combination of separate securities that possess the two principal characteristics of a traditional convertible security, that is, an income-producing component and the right to acquire a convertible component. The income-producing component is achieved by investing in non-convertible, income-producing securities such as bonds, preferred stocks and money market instruments. The convertible component is achieved by purchasing warrants or options to buy common stock at a certain exercise price, or options on a stock index. The Fund may also purchase synthetic securities created by other parties, typically investment banks, including convertible structured notes. The income-producing and convertible components of a synthetic convertible security may be issued separately by different issuers and at different times. The values of synthetic convertible securities will respond differently to market fluctuations than a traditional convertible security because a synthetic convertible is composed of two or more separate securities or instruments, each with its own market value. Synthetic convertible securities are also subject to the risks associated with derivatives. See “Principal Risks of the Fund—Derivatives Risk.” In addition, if the value of the underlying common stock or the level of the index involved in the convertible element falls below the strike price of the warrant or option, the warrant or option may lose all value.

Reverse Repurchase Agreements and Dollar Rolls

As described under “Leverage,” the Fund initially intends to use reverse repurchase agreements to add leverage to its portfolio, and may also use dollar rolls for this purpose. Under a reverse repurchase agreement, the Fund sells securities to a bank or broker dealer and agrees to repurchase the securities at a mutually agreed future date and price. A dollar roll is similar to a reverse repurchase agreement except that the counterparty with which the Fund enters into a dollar roll transaction is not obligated to return the same securities as those originally sold by the Fund, but only securities that are “substantially identical.” Generally, the effect of a reverse repurchase agreement or dollar roll transaction is that the Fund can recover and reinvest all or most of the cash invested in the portfolio securities involved during the term of the agreement and still be entitled to the returns associated with those portfolio securities, thereby resulting in a transaction similar to a borrowing and giving rise to

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leverage for the Fund. The Fund will incur interest expense as a cost of utilizing reverse repurchase agreements and dollar rolls. In the event the buyer of securities under a reverse repurchase agreement or dollar roll files for bankruptcy or becomes insolvent, the Fund’s use of the proceeds of the agreement may be restricted pending a determination by the other party, or its trustee or receiver, whether to enforce the Fund’s obligation to repurchase the securities.

Commercial Paper

Commercial paper represents short-term unsecured promissory notes issued in bearer form by corporations such as banks or bank holding companies and finance companies. The rate of return on commercial paper may be linked or indexed to the level of exchange rates between the U.S. dollar and a foreign currency or currencies.

U.S. Government Securities

U.S. Government securities are obligations of and, in certain cases, guaranteed by, the U.S. Government, its agencies or instrumentalities. The U.S. Government does not guarantee the net asset value of the Fund’s shares. Some U.S. Government securities, such as Treasury bills, notes and bonds, and securities guaranteed by GNMA, are supported by the full faith and credit of the United States; others, such as those of the Federal Home Loan Banks, are supported by the right of the issuer to borrow from the U.S. Department of the Treasury (the “U.S. Treasury”); others, such as those of FNMA, are supported by the discretionary authority of the U.S. Government to purchase the agency’s obligations; and still others, such as those of the Student Loan Marketing Association, are supported only by the credit of the instrumentality. U.S. Government securities may include zero coupon securities, which do not distribute interest on a current basis and tend to be subject to greater risk than interest-paying securities of similar maturities.

Bank Capital Securities and Bank Obligations

The Fund may invest in bank capital securities of both non-U.S. (foreign) and U.S. issuers. Bank capital securities are issued by banks to help fulfill their regulatory capital requirements. There are three common types of bank capital: Lower Tier II, Upper Tier II and Tier I. Upper Tier II securities are commonly thought of as hybrids of debt and preferred stock. Upper Tier II securities are often perpetual (with no maturity date), callable and have a cumulative interest deferral feature. This means that under certain conditions, the issuer bank can withhold payment of interest until a later date. However, such deferred interest payments generally earn interest. Tier I securities often take the form of trust preferred securities.

The Fund may also invest in other bank obligations including without limitation certificates of deposit, bankers’ acceptances and fixed time deposits. Certificates of deposit are negotiable certificates that are issued against funds deposited in a commercial bank for a definite period of time and that earn a specified return. Bankers’ acceptances are negotiable drafts or bills of exchange, normally drawn by an importer or exporter to pay for specific merchandise, which are “accepted” by a bank, meaning, in effect, that the bank unconditionally agrees to pay the face value of the instrument on maturity. Fixed time deposits are bank obligations payable at a stated maturity date and bearing interest at a fixed rate. Fixed time deposits may be withdrawn on demand by the investor, but may be subject to early withdrawal penalties which vary depending upon market conditions and the remaining maturity of the obligation. There are generally no contractual restrictions on the right to transfer a beneficial interest in a fixed time deposit to a third party, although there is generally no market for such deposits. The Fund may also hold funds on deposit with its custodian bank in an interest-bearing account for temporary purposes.

Zero-Coupon Bonds, Step-Ups and Payment-In-Kind Securities

Zero-coupon bonds pay interest only at maturity rather than at intervals during the life of the security. Like zero-coupon bonds, “step up” bonds pay no interest initially but eventually begin to pay a coupon rate prior to maturity, which rate may increase at stated intervals during the life of the security. Payment-in-kind securities (“PIKs”) are debt obligations that pay “interest” in the form of other debt obligations, instead of in cash. Each of these instruments is normally issued and traded at a deep discount from face value. Zero-coupon bonds, step-ups

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and PIKs allow an issuer to avoid or delay the need to generate cash to meet current interest payments and, as a result, may involve greater credit risk than bonds that pay interest currently or in cash. The Fund would be required to distribute the income on these instruments as it accrues, even though the Fund will not receive the income on a current basis or in cash. Thus, the Fund may have to sell other investments, including when it may not be advisable to do so, to make income distributions to its shareholders.

Inflation-Indexed Bonds

Inflation-indexed bonds (other than municipal inflation-indexed bonds and certain corporate inflation-indexed bonds) are fixed income securities the principal value of which is periodically adjusted according to the rate of inflation. If the index measuring inflation falls, the principal value of inflation-indexed bonds (other than municipal inflation-indexed bonds and certain corporate inflation-indexed bonds) will be adjusted downward, and consequently the interest payable on these securities (calculated with respect to a smaller principal amount) will be reduced. Repayment of the original bond principal upon maturity (as adjusted for inflation) is guaranteed in the case of U.S. Treasury inflation-indexed bonds (“TIPS”). For bonds that do not provide a similar guarantee, the adjusted principal value of the bond repaid at maturity may be less than the original principal. With regard to municipal inflation-indexed bonds and certain corporate inflation-indexed bonds, the inflation adjustment is typically reflected in the semi-annual coupon payment. As a result, the principal value of municipal inflation-indexed bonds and such corporate inflation-indexed bonds does not adjust according to the rate of inflation.

The value of inflation-indexed bonds is expected to change in response to changes in real interest rates. Real interest rates are tied to the relationship between nominal interest rates and the rate of inflation. If nominal interest rates increase at a faster rate than inflation, real interest rates may rise, leading to a decrease in value of inflation-indexed bonds. Any increase in the principal amount of an inflation-indexed bond will be considered taxable ordinary income, even though investors do not receive their principal until maturity. See “Tax Matters.”

Event-Linked Instruments

The Fund may obtain event-linked exposure by investing in “event-linked bonds” or “event-linked swaps” or by implementing “event-linked strategies.” Event-linked exposure results in gains or losses that typically are contingent upon, or formulaically related to, defined trigger events. Examples of trigger events include hurricanes, earthquakes, weather-related phenomena or statistics relating to such events. Some event-linked bonds are commonly referred to as “catastrophe bonds.” If a trigger event occurs, the Fund may lose a portion or its entire principal invested in the bond or notional amount on a swap. Event-linked exposure often provides for an extension of maturity to process and audit loss claims when a trigger event has, or possibly has, occurred. An extension of maturity may increase volatility. Event-linked exposure may also expose the Fund to certain other risks including credit risk, counterparty risk, adverse regulatory or jurisdictional interpretations and adverse tax consequences. Event-linked exposures may also be subject to liquidity risk.

Variable- and Floating-Rate Securities

Variable- and floating-rate instruments are instruments that pay interest at rates that adjust whenever a specified interest rate changes and/or that reset on predetermined dates (such as the last day of a month or calendar quarter). In addition to Senior Loans, variable- and floating-rate instruments may include, without limitation, instruments such as catastrophe and other event-linked bonds, bank capital securities, unsecured bank loans, corporate bonds, money market instruments and certain types of mortgage-related and other asset-backed securities. Due to their variable- or floating-rate features, these instruments will generally pay higher levels of income in a rising interest rate environment and lower levels of income as interest rates decline. For the same reason, the market value of a variable- or floating-rate instrument is generally expected to have less sensitivity to fluctuations in market interest rates than a fixed-rate instrument, although the value of a variable- or floating-rate instrument may nonetheless decline as interest rates rise and due to other factors, such as changes in credit quality.

The Fund also may engage in credit spread trades. A credit spread trade is an investment position relating to a difference in the prices or interest rates of two bonds or other securities, in which the value of the investment

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position is determined by changes in the difference between the prices or interest rates, as the case may be, of the respective securities.

Inverse Floaters

An inverse floater is a type of debt instrument that bears a floating or variable interest rate that moves in the opposite direction to interest rates generally or the interest rate on another security or index. Changes in interest rates generally, or the interest rate of the other security or index, inversely affect the interest rate paid on the inverse floater, with the result that the inverse floater’s price will be considerably more volatile than that of a fixed-rate bond. The Fund may invest without limitation in inverse floaters, which brokers typically create by depositing an income-producing instrument, which may be a mortgage-related security, in a trust. The trust in turn issues a variable rate security and inverse floaters. The interest rate for the variable rate security is typically determined by an index or an auction process, while the inverse floater holder receives the balance of the income from the underlying income-producing instrument less an auction fee. The market prices of inverse floaters may be highly sensitive to changes in interest rates and prepayment rates on the underlying securities, and may decrease significantly when interest rates increase or prepayment rates change. In a transaction in which the Fund purchases an inverse floater from a trust, and the underlying bond was held by the Fund prior to being deposited into the trust, the Fund typically treats the transaction as a secured borrowing for financial reporting purposes. As a result, for financial reporting purposes, the Fund will generally incur a non-cash interest expense with respect to interest paid by the trust on the variable rate securities, and will recognize additional interest income in an amount directly corresponding to the non-cash interest expense. Therefore, the Fund’s net asset value per Common Share and performance are not affected by the non-cash interest expense. This accounting treatment does not apply to inverse floaters acquired by the Fund when the Fund did not previously own the underlying bond.

Derivatives

The Fund may, but is not required to, use a variety of derivative instruments (both long and short positions) for both investment and risk management purposes. The Fund may use various derivatives transactions to add leverage to its portfolio. See “Leverage.” Generally, derivatives are financial contracts whose value depends upon, or is derived from, the value of an underlying asset, reference rate or index, and may relate to, among others, individual debt instruments, interest rates, currencies or currency exchange rates, commodities and related indexes. Examples of derivative instruments that the Fund may use include, without limitation, futures and forward contracts (including foreign currency exchange contracts), call and put options (including options on futures contracts), credit default swaps, total return swaps, basis swaps and other swap agreements. The Fund’s use of derivative instruments involves risks different from, or possibly greater than, the risks associated with investment directly in securities and other more traditional investments. See “Principal Risks of the Fund—Derivatives Risk.” Certain types of derivative instruments that the Fund may utilize are described elsewhere in this section, including those described under “—Certain Interest Rate Transactions,” “—Credit Default Swaps” and “—Structured Notes and Related Instruments.” Please see “Investment Objectives and Policies—Derivative Instruments” in the Statement of Additional Information for additional information about these and other derivative instruments that the Fund may use and the risks associated with such instruments. There is no assurance that these derivative strategies will be available at any time or that PIMCO will determine to use them for the Fund or, if used, that the strategies will be successful. In addition, the Fund may be subject to certain restrictions on its use of derivative strategies imposed by guidelines of one or more rating agencies that may issue ratings for any preferred shares issued by the Fund.

Certain Interest Rate Transactions

In order to reduce the interest rate risk inherent in the Fund’s underlying investments and capital structure, the Fund may (but is not required to) enter into interest rate swap transactions. Interest rate swaps involve the exchange by the Fund with a counterparty of their respective commitments to pay or receive interest, such as an exchange of fixed rate payments for floating rate payments. These transactions generally involve an agreement with the swap counterparty to pay a fixed or variable rate payment in exchange for the counterparty paying the Fund the other type of payment stream ( i.e. , variable or fixed). The payment obligation would be based on the notional amount of the

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swap. Other forms of interest rate swap agreements in which the Fund may invest include without limitation interest rate caps, under which, in return for a premium, one party agrees to make payments to the other to the extent that interest rates exceed a specified rate, or “cap;” interest rate floors, under which, in return for a premium, one party agrees to make payments to the other to the extent that interest rates fall below a specified rate, or “floor;” and interest rate “collars,” under which a party sells a cap and purchases a floor or vice versa in an attempt to protect itself against interest rate movements exceeding given minimum or maximum levels. The Fund may (but is not required to) use interest rate swap transactions with the intent to reduce or eliminate the risk that an increase in short-term interest rates could pose for the performance of the Fund’s Common Shares as a result of leverage, and also may use these instruments for other hedging or investment purposes. Any termination of an interest rate swap transaction could result in a termination payment by or to the Fund.

Credit Default Swaps

The Fund may enter into credit default swaps for both investment and risk management purposes, as well as to add leverage to the Fund’s portfolio. A credit default swap may have as reference obligations one or more securities that are not currently held by the Fund. The protection “buyer” in a credit default swap is generally obligated to pay the protection “seller” an upfront or a periodic stream of payments over the term of the contract provided that no credit event, such as a default, on a reference obligation has occurred. If a credit event occurs, the seller generally must pay the buyer the “par value” (full notional value) of the swap in exchange for an equal face amount of deliverable obligations of the reference entity described in the swap, or the seller may be required to deliver the related net cash amount, if the swap is cash settled. The Fund may be either the buyer or seller in the transaction. If the Fund is a buyer and no credit event occurs, the Fund may recover nothing if the swap is held through its termination date. However, if a credit event occurs, the buyer generally may elect to receive the full notional value of the swap from the seller, who, in turn, generally will recover an amount significantly lower than the equivalent face amount of the obligations of the reference entity, whose value may have significantly decreased, through (i) physical delivery of such obligations by the buyer, (ii) cash settlement or (iii) an auction process. As a seller, the Fund generally receives an upfront payment or a fixed rate of income throughout the term of the swap provided that there is no credit event. As the seller, the Fund would effectively add leverage to its portfolio because, in addition to its total net assets, the Fund would be subject to investment exposure on the notional amount of the swap.

The spread of a credit default swap is the annual amount the protection buyer must pay the protection seller over the length of the contract, expressed as a percentage of the notional amount. When spreads rise, market perceived credit risk rises and when spreads fall, market perceived credit risk falls. Wider credit spreads and decreasing market values, when compared to the notional amount of the swap, represent a deterioration of the referenced entity’s credit soundness and a greater likelihood or risk of default or other credit event occurring as defined under the terms of the agreement. For credit default swaps on asset-backed securities and credit indices, the quoted market prices and resulting values, as well as the annual payment rate, serve as an indication of the current status of the payment/performance risk.

Credit default swaps involve greater risks than if the Fund had invested in the reference obligation directly since, in addition to general market risks, credit default swaps are subject to illiquidity risk, counterparty risk and credit risk, among other risks associated with derivative instruments. A buyer generally also will lose its investment and recover nothing should no credit event occur and the swap is held to its termination date. If a credit event were to occur, the value of any deliverable obligation received by the seller, coupled with the upfront or periodic payments previously received, may be less than the full notional value it pays to the buyer, resulting in a loss of value to the seller. The Fund’s obligations under a credit default swap will be accrued daily (offset against any amounts owing to the Fund). In connection with credit default swaps in which the Fund is the buyer, the Fund may segregate or “earmark” cash or liquid assets, or enter into certain offsetting positions, with a value at least equal to the Fund’s exposure (any accrued but unpaid net amounts owed by the Fund to any counterparty), on a marked-to-market basis. In connection with credit default swaps in which the Fund is the seller, the Fund may segregate or “earmark” cash or liquid assets, or enter into offsetting positions, with a value at least equal to the full notional amount of the swap (minus any amounts owed to the Fund). Such segregation or “earmarking” will not limit the Fund’s exposure to loss. See “Principal Risks of the Fund—Segregation and Coverage Risk” and “Principal Risks of the Fund—Regulatory Risk—Commodity Pool Operator.”

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Hybrid Instruments

A hybrid instrument is a type of potentially high-risk derivative that combines a traditional bond, stock or commodity with an option or forward contract. Generally, the principal amount, amount payable upon maturity or redemption, or interest rate of a hybrid is tied (positively or negatively) to the price of some commodity, currency or securities index or another interest rate or some other economic factor (each a “benchmark”). The interest rate or (unlike most fixed income securities) the principal amount payable at maturity of a hybrid security may be increased or decreased, depending on changes in the value of the benchmark. An example of a hybrid could be a bond issued by an oil company that pays a small base level of interest with additional interest that accrues in correlation to the extent to which oil prices exceed a certain predetermined level. Such a hybrid instrument would be a combination of a bond and a call option on oil.

Hybrids can be used as an efficient means of pursuing a variety of investment goals, including currency hedging, duration management and increased total return. Hybrids may not bear interest or pay dividends. The value of a hybrid or its interest rate may be a multiple of a benchmark and, as a result, may be leveraged and move (up or down) more steeply and rapidly than the benchmark. These benchmarks may be sensitive to economic and political events, such as commodity shortages and currency devaluations, which cannot be readily foreseen by the purchaser of a hybrid. Under certain conditions, the redemption value of a hybrid could be zero. Thus, an investment in a hybrid may entail significant market risks that are not associated with a similar investment in a traditional, U.S. dollar-denominated bond that has a fixed principal amount and pays a fixed rate or floating rate of interest. The purchase of hybrids also exposes the Fund to the credit risk of the issuer of the hybrids. These risks may cause significant fluctuations in the net asset value of the Common Shares if the Fund invests in hybrid instruments.

Certain hybrid instruments may provide exposure to the commodities markets. These are derivative securities with one or more commodity-linked components that have payment features similar to commodity futures contracts, commodity options or similar instruments. Commodity-linked hybrid instruments may be either equity or debt securities, leveraged or unleveraged, and are considered hybrid instruments because they have both security and commodity-like characteristics. A portion of the value of these instruments may be derived from the value of a commodity, futures contract, index or other economic variable.

Certain issuers of structured products such as hybrid instruments may be deemed to be investment companies as defined in the 1940 Act. As a result, the Fund’s investments in these products may be subject to limits applicable to investments in investment companies and may be subject to restrictions contained in the 1940 Act.

The Fund’s use of commodity-linked instruments can be limited by the Fund’s intention to qualify as a “regulated investment company,” and can limit the Fund’s ability to so qualify. In order to qualify for the special tax treatment accorded regulated investment companies and their shareholders, the Fund must, among other things, derive at least 90% of its income from certain specified sources (qualifying income). Income from certain commodity-linked instruments does not constitute qualifying income to the Fund. The tax treatment of certain other commodity-linked instruments in which the Fund might invest is not certain, in particular with respect to whether income and gains from such instruments constitute qualifying income. If the Fund were to treat income from a particular instrument as qualifying income and the income were later determined not to constitute qualifying income and, together with any other nonqualifying income, caused the Fund’s nonqualifying income to exceed 10% of its gross income in any taxable year, the Fund would fail to qualify as a regulated investment company unless it is eligible to and does pay a tax at the Fund level. See “Tax Matters.”

Structured Notes and Related Instruments

The Fund may invest in “structured” notes and other related instruments, which are privately negotiated debt obligations in which the principal and/or interest is determined by reference to the performance of a benchmark asset, market or interest rate (an “embedded index”), such as selected securities, an index of securities or specified interest rates, or the differential performance of two assets or markets, such as indexes reflecting bonds. Structured instruments may be issued by corporations, including banks, as well as by governmental agencies. Structured instruments frequently are assembled in the form of medium-term notes, but a variety of forms are available and may be used in particular circumstances. The terms of such structured instruments normally

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provide that their principal and/or interest payments are to be adjusted upwards or downwards (but ordinarily not below zero) to reflect changes in the embedded index while the structured instruments are outstanding. As a result, the interest and/or principal payments that may be made on a structured product may vary widely, depending on a variety of factors, including the volatility of the embedded index and the effect of changes in the embedded index on principal and/or interest payments. The rate of return on structured notes may be determined by applying a multiplier to the performance or differential performance of the referenced index(es) or other asset(s). Application of a multiplier involves leverage that will serve to magnify the potential for gain and the risk of loss.

The Fund may use structured instruments for investment purposes and also for risk management purposes, such as to reduce the duration and interest rate sensitivity of the Fund’s portfolio, and for leveraging purposes. While structured instruments may offer the potential for a favorable rate of return from time to time, they also entail certain risks. Structured instruments may be less liquid than other debt securities, and the price of structured instruments may be more volatile. In some cases, depending on the terms of the embedded index, a structured instrument may provide that the principal and/or interest payments may be adjusted below zero. Structured instruments also may involve significant credit risk and risk of default by the counterparty. Structured instruments may also be illiquid. Like other sophisticated strategies, the Fund’s use of structured instruments may not work as intended. If the value of the embedded index changes in a manner other than that expected by PIMCO, principal and/or interest payments received on the structured instrument may be substantially less than expected. Also, if PIMCO chooses to use structured instruments to reduce the duration of the Fund’s portfolio, this may limit the Fund’s return when having a longer duration would be beneficial (for instance, when interest rates decline).

Credit-Linked Trust Certificates

The Fund may invest in credit-linked trust certificates, which are investments in a limited purpose trust or other vehicle which, in turn, invests in a basket of derivative instruments, such as credit default swaps, total return swaps, interest rate swaps or other securities, in order to provide exposure to the high yield or another debt securities market. Like an investment in a bond, investments in credit-linked trust certificates represent the right to receive periodic income payments (in the form of distributions) and payment of principal at the end of the term of the certificate. However, these payments are conditioned on the trust’s receipt of payments from, and the trust’s potential obligations to, the counterparties to the derivative instruments and other securities in which the trust invests. For instance, the trust may sell one or more credit default swaps, under which the trust would receive a stream of payments over the term of the swap agreements provided that no event of default has occurred with respect to the referenced debt obligation upon which the swap is based. If a default occurs, the stream of payments may stop and the trust would be obligated to pay to the counterparty the par (or other agreed upon value) of the referenced debt obligation. This, in turn, would reduce the amount of income and principal that the Fund would receive as an investor in the trust. The Fund’s investments in these instruments are indirectly subject to the risks associated with derivative instruments, including, among others, credit risk, default or similar event risk, counterparty risk, interest rate risk, leverage risk, valuation risk and management risk. It is expected that the trusts that issue credit-linked trust certificates will constitute “private” investment companies, exempt from registration under the 1940 Act. Therefore, the certificates will not be subject to applicable investment limitations and other regulation imposed by the 1940 Act (although the Fund will remain subject to such limitations and regulation, including with respect to its investments in the certificates). Although the trusts are typically private investment companies, they generally are not actively managed such as a “hedge fund” might be. It also is expected that the certificates will be exempt from registration under the Securities Act. Accordingly, there may be no established trading market for the certificates and they may constitute illiquid investments. See “Principal Risks of the Fund—Liquidity Risk.” If market quotations are not readily available for the certificates, they will be valued by the Fund at fair value as determined by the Board or persons acting at its direction. See “Net Asset Value.” The Fund may lose its entire investment in a credit-linked trust certificate.

Other Investment Companies

The Fund may invest in securities of other open- or closed-end investment companies, including without limitation exchange traded funds (“ETFs”), to the extent that such investments are consistent with the Fund’s

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investment objectives, strategies and policies and permissible under the 1940 Act. The Fund may invest in other investment companies to gain broad market or sector exposure, including during periods when it has large amounts of uninvested cash (such as the period shortly after the Fund receives the proceeds of the offering of its Common Shares) or when PIMCO believes share prices of other investment companies offer attractive values. As a shareholder in an investment company, the Fund would bear its ratable share of that investment company’s expenses and would remain subject to payment of the Fund’s management fees and other expenses with respect to assets so invested. Common Shareholders would therefore be subject to duplicative expenses to the extent the Fund invests in other investment companies. The securities of other investment companies may be leveraged, in which case the net asset value and/or market value of the investment company’s shares will be more volatile than unleveraged investments. See “Principal Risks of the Fund—Leverage Risk.”

Common Stocks and Other Equity Securities

The Fund will not normally invest directly in common stocks of operating companies. However, the Fund may own and hold common stocks in its portfolio from time to time in connection with a corporate action or the restructuring of a debt instrument or through the conversion of a convertible security held by the Fund. For instance, in connection with the restructuring of a debt instrument, either outside of bankruptcy court or in the context of bankruptcy court proceedings, the Fund may determine or be required to accept common stocks or other equity securities in exchange for all or a portion of the debt instrument. Depending upon, among other things, PIMCO’s evaluation of the potential value of such securities in relation to the price that could be obtained by the Fund at any given time upon sale thereof, the Fund may determine to hold these equity securities in its portfolio. The Fund may invest in common shares of pooled vehicles, such as those of other investment companies, and in common shares of REITs.

Although common stocks and other equity securities have historically generated higher average returns than debt securities over the long term, they also have experienced significantly more volatility in those returns and in certain years have significantly underperformed relative to debt securities. An adverse event, such as an unfavorable earnings report, may depress the value of a particular equity security held by the Fund. Also, prices of common stocks and other equity securities are sensitive to general movements in the equity markets and a decline in those markets may depress the prices of the equity securities held by the Fund. The prices of equity securities fluctuate for many different reasons, including changes in investors’ perceptions of the financial condition of an issuer or the general condition of the relevant stock market or when political or economic events affecting the issuer occur. In addition, prices of equity securities may be particularly sensitive to rising interest rates, as the cost of capital rises and borrowing costs increase.

Repurchase Agreements

The Fund may enter into repurchase agreements, in which the Fund purchases a security from a bank or broker-dealer and the bank or broker-dealer agrees to repurchase the security at the Fund’s cost plus interest within a specified time. If the party agreeing to repurchase should default, the Fund will seek to sell the securities it holds. This could involve transaction costs or delays in addition to a loss on the securities if their value should fall below their repurchase price. Repurchase agreements maturing in more than seven days are considered to be illiquid securities.

When Issued, Delayed Delivery and Forward Commitment Transactions

The Fund may purchase securities that it is eligible to purchase on a when-issued basis, may purchase and sell such securities for delayed delivery and may make contracts to purchase such securities for a fixed price at a future date beyond normal settlement time (forward commitments). When-issued transactions, delayed delivery purchases and forward commitments involve a risk of loss if the value of the securities declines prior to the settlement date. The risk is in addition to the risk that the Fund’s other assets will decline in value. Therefore, these transactions may result in a form of leverage and increase the Fund’s overall investment exposure. Typically, no income accrues on securities the Fund has committed to purchase prior to the time delivery of the securities is made, although the Fund may earn income on securities it has segregated to cover these positions. When the Fund has sold a security on a when-issued, delayed delivery or forward commitment basis, the Fund does not participate in future gains or losses with respect to the security. If the other party to a transaction fails to

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pay for the securities, the Fund could suffer a loss. Additionally, when selling a security on a when-issued, delayed delivery or forward commitment basis without owning the security, the Fund will incur a loss if the security’s price appreciates in value such that the security’s price is above the agreed-upon price on the settlement date.

Short Sales

A short sale is a transaction in which the Fund sells a security or other instrument that it does not own in anticipation that the market price will decline. The Fund may use short sales for investment purposes or for hedging and risk management purposes. The Fund may also take short positions with respect to the performance of securities, indexes, interest rates, currencies and other assets or markets through the use of derivative or forward instruments. When the Fund engages in a short sale of a security, it must borrow the security sold short and deliver it to the counterparty. The Fund may have to pay a fee to borrow particular securities and would often be obligated to pay over any payments received on such borrowed securities. The Fund’s obligation to replace the borrowed security will be secured by collateral deposited with the Fund’s custodian in the name of the lender. The Fund may not receive any payments (including interest) on its collateral. Short sales expose the Fund to the risk that it will be required to cover its short position at a time when the securities have appreciated in value, thus resulting in a loss to the Fund. The Fund may engage in so-called “naked” short sales when it does not own or have the immediate right to acquire the security sold short at no additional cost, in which case the Fund’s losses theoretically could be unlimited. If the price of the security sold short increases between the time of the short sale and the time that the Fund replaces the borrowed security, the Fund will incur a loss; conversely, if the price declines, the Fund will realize a gain. Any gain will be decreased, and any loss increased, by the transaction costs described above. The successful use of short selling may be adversely affected by imperfect correlation between movements in the price of the security sold short and securities being hedged if the short sale is being used for hedging purposes. See “—Derivatives” and “Principal Risks of the Fund—Short Sales Risk.” See also “Principal Risks of the Fund—Leverage Risk” and “Principal Risks of the Fund—Segregation and Coverage Risk.” The Fund may engage in short selling to the extent permitted by the 1940 Act and the rules and interpretations thereunder and other federal securities laws.

Lending of Portfolio Securities

For the purpose of achieving income, the Fund may lend its portfolio securities to brokers, dealers or other financial institutions provided a number of conditions are satisfied, including that the loan is fully collateralized. See “Investment Objectives and Policies—Securities Loans” in the Statement of Additional Information for details. When the Fund lends portfolio securities, its investment performance will continue to reflect changes in the value of the securities loaned. The Fund will also receive a fee or interest on the collateral. Securities lending involves the risk of loss of rights in the collateral or delay in recovery of the collateral if the borrower fails to return the security loaned or becomes insolvent, or the risk of loss due to the investment performance of the collateral. The Fund may pay lending fees to the party arranging the loan.

Please see “Investment Objectives and Policies” in the Statement of Additional Information for additional information regarding the investments of the Fund and their related risks.

Portfolio Turnover

The length of time the Fund has held a particular security is not generally a consideration in investment decisions. A change in the securities held by the Fund is known as “portfolio turnover.” The Fund may engage in frequent and active trading of portfolio securities to achieve its investment objectives, particularly during periods of volatile market movements. High portfolio turnover ( e.g., over 100%) generally involves correspondingly greater expenses to the Fund, including brokerage commissions or dealer mark-ups and other transaction costs on the sale of securities and reinvestments in other securities. Sales of portfolio securities may also result in realization of taxable capital gains, including short-term capital gains (which are generally treated as ordinary income upon distribution in the form of dividends). The trading costs and tax effects associated with portfolio turnover may adversely affect the Fund’s performance.

Please see “Investment Objectives and Policies” in the Statement of Additional Information for additional information regarding the investments of the Fund and their related risks.

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LEVERAGE

As soon as reasonably practicable following the completion of the initial public offering of the Fund’s Common Shares, the Fund intends, subject to then favorable market conditions, to add leverage to its portfolio by utilizing reverse repurchase agreements, such that the leverage initially obtained utilizing reverse repurchase agreements represents approximately 29% of the Fund’s total assets (including the amounts of leverage obtained through the use of such instruments). The Fund may also obtain leverage through dollar rolls or borrowings, such as through bank loans or commercial paper or other credit facilities. The Fund may also enter into transactions other than those noted above that may give rise to a form of leverage including, among others, futures and forward contracts (including foreign currency exchange contracts), credit default swaps, total return swaps and other derivative transactions, loans of portfolio securities, short sales and when-issued, delayed delivery and forward commitment transactions. Although it has no current intention to do so, the Fund may also determine to issue preferred shares or other types of senior securities to add leverage to its portfolio.

The Fund intends to utilize reverse repurchase agreements, dollar rolls, borrowings and other forms of leverage opportunistically and may choose to increase or decrease, or eliminate entirely, its use of leverage over time and from time to time ( i.e. , higher or lower than the anticipated approximate 29% initial reverse repurchase agreement level noted above) based on PIMCO’s assessment of the yield curve environment, interest rate trends, market conditions and other factors. See “Principal Risks of the Fund—Segregation and Coverage Risk.”

Under normal market conditions, the Fund will limit its use of leverage from any combination of (i) reverse repurchase agreements or dollar roll transactions (whether or not these instruments are covered as discussed below), (ii) borrowings ( i.e. , loans or lines of credit from banks or other credit facilities), (iii) any future issuance of preferred shares, and (iv) to the extent described below, credit default swaps, other swap agreements and futures contracts (whether or not these instruments are covered with segregated assets as discussed below) such that the assets attributable to the use of such leverage will not exceed 50% of the Fund’s total assets (including, for purposes of the 50% limit, the amounts of leverage obtained through the use of such instruments) (the “50% policy”). For these purposes, assets attributable to the use of leverage from credit default swaps, other swap agreements and futures contracts will be determined based on the current market value of the instrument if it is cash settled or based on the notional value of the instrument if it is not cash settled. In addition, assets attributable to credit default swaps, other swap agreements or futures contracts will not be counted towards the 50% policy to the extent that the Fund owns offsetting positions or enters into offsetting transactions.

The net proceeds the Fund obtains from reverse repurchase agreements or other forms of leverage utilized will be invested in accordance with the Fund’s investment objectives and policies as described in this prospectus. So long as the rate of return, net of applicable Fund expenses, on the debt obligations and other investments purchased by the Fund exceeds the costs to the Fund of the leverage it utilizes, the investment of the Fund’s net assets attributable to leverage will generate more income than will be needed to pay the costs of the leverage. If so, and all other things being equal, the excess may be used to pay higher dividends to Common Shareholders than if the Fund were not so leveraged.

The 1940 Act generally prohibits the Fund from engaging in most forms of leverage (including the use of reverse repurchase agreements, dollar rolls, bank loans, commercial paper or other credit facilities, credit default swaps, total return swaps and other derivative transactions, loans of portfolio securities, short sales and when-issued, delayed delivery and forward commitment transactions, to the extent that these instruments are not covered as described below) unless immediately after the issuance of the leverage the Fund has satisfied the asset coverage test with respect to senior securities representing indebtedness prescribed by the 1940 Act; that is, the value of the Fund’s total assets less all liabilities and indebtedness not represented by senior securities (for these purposes, “total net assets”) is at least 300% of the senior securities representing indebtedness (effectively limiting the use of leverage through senior securities representing indebtedness to 33  ¹ / 3 % of the Fund’s total net assets, including assets attributable to such leverage). In addition, the Fund is not permitted to declare any cash dividend or other distribution on Common Shares unless, at the time of such declaration, this asset coverage test is satisfied. The Fund may (but is not required to) cover its commitments under reverse repurchase agreements,

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dollar rolls, derivatives and certain other instruments by the segregation of liquid assets, or by entering into offsetting transactions or owning positions covering its obligations. To the extent that certain of these instruments are so covered, they will not be considered “senior securities” under the 1940 Act and therefore will not be subject to the 1940 Act 300% asset coverage requirement otherwise applicable to forms of leverage used by the Fund. However, reverse repurchase agreements and other such instruments, even if covered, represent a form of economic leverage and create special risks. The use of these forms of leverage increases the volatility of the Fund’s investment portfolio and could result in larger losses to Common Shareholders than if these strategies were not used. See “Principal Risks of the Fund—Leverage Risk.” To the extent that the Fund engages in borrowings, it may prepay a portion of the principal amount of the borrowing to the extent necessary in order to maintain the required asset coverage. Failure to maintain certain asset coverage requirements could result in an event of default.

Leveraging is a speculative technique and there are special risks and costs involved. There is no assurance that the Fund will utilize reverse repurchase agreements, dollar rolls or borrowings, issue preferred shares or utilize any other forms of leverage (such as the use of derivatives strategies). If used, there can be no assurance that the Fund’s leveraging strategies will be successful or result in a higher yield on your Common Shares. When leverage is used, the net asset value and market price of the Common Shares and the yield to Common Shareholders will be more volatile. See “Principal Risks of the Fund—Leverage Risk.” In addition, interest and other expenses borne by the Fund with respect to its use of reverse repurchase agreements, dollar rolls, borrowings or any other forms of leverage are borne by the Common Shareholders and result in a reduction of the net asset value of the Common Shares. In addition, because the fees received by the Investment Manager and by the Sub-Adviser are based on the total managed assets of the Fund (including any assets attributable to any reverse repurchase agreements, dollar rolls, borrowings and preferred shares that may be outstanding), the Investment Manager and the Sub-Adviser have a financial incentive for the Fund to use certain forms of leverage ( e.g. , reverse repurchase agreements, dollar rolls, borrowings and preferred shares), which may create a conflict of interest between the Investment Manager and the Sub-Adviser, on the one hand, and the Common Shareholders, on the other hand.

The Fund also may borrow money in order to repurchase its shares or as a temporary measure for extraordinary or emergency purposes, including for the payment of dividends or the settlement of securities transactions which otherwise might require untimely dispositions of portfolio securities held by the Fund.

Effects of Leverage

Assuming the Fund engages in reverse repurchase agreements, representing 29% of the Fund’s total assets (including the amounts of leverage obtained through the use of such instruments), at an annual effective interest expense rate of 1.13% payable by the Fund on such instruments (based on market interest rates as of the date of this prospectus), the annual return that the Fund’s portfolio must experience (net of expenses) in order to cover such costs of the reverse repurchase agreements would be 0.46%. Of course, the figures are merely estimates based on current market conditions, used for illustration purposes only. Actual interest expenses associated with reverse repurchase agreements (or dollar rolls or borrowings, if any) used by the Fund may vary frequently and may be significantly higher or lower that the rate used for the example above.

The following table is furnished in response to requirements of the SEC. It is designed to illustrate the effects of leverage on Common Share total return, assuming investment portfolio total returns (consisting of income and changes in the value of investments held in the Fund’s portfolio) of -10%, -5%, 0%, 5% and 10%. These assumed investment portfolio returns are hypothetical figures and are not necessarily indicative of the investment portfolio returns expected to be experienced by the Fund. The table further assumes that the Fund utilizes reverse repurchase agreements representing 29% of the Fund’s total assets (including the amounts of leverage obtained through the use of such instruments) and a projected annual rate of interest expense on the Fund’s reverse repurchase agreements of 1.13%. Your actual returns may be greater or less than those appearing below.

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Common Share total return is composed of two elements—the Common Share dividends paid by the Fund (the amount of which is largely determined by the net investment income of the Fund after paying interest expenses on the Fund’s leveraging transactions as described above and dividend payments on any preferred shares issued by the Fund) and gains or losses on the value of the securities the Fund owns. As required by SEC rules, the table assumes that the Fund is more likely to suffer capital losses than to enjoy capital appreciation. For example, to assume a total return of 0%, the Fund must assume that the income it receives on its investments is entirely offset by losses in the value of those investments. This table reflects hypothetical performance of the Fund’s portfolio and not the performance of the Fund’s Common Shares, the value of which will be determined by market forces and other factors.

Any benefits of leverage used by the Fund cannot be fully achieved until the proceeds resulting from the use of leverage have been received by the Fund and invested in accordance with the Fund’s investment objectives and policies. The Fund’s willingness to use leverage, and the extent to which leverage is used at any time, will depend on many factors, including, among other things, PIMCO’s assessment of the yield curve environment, interest rate trends, market conditions and other factors.

Possible Future Issuance of Preferred Shares

As noted above, although the Fund has no present intention to do so, the Fund may determine in the future to issue preferred shares to add leverage to its portfolio. Any such preferred shares would have complete priority upon distribution of assets over the Common Shares. Under the 1940 Act, the Fund would not be permitted to issue preferred shares unless immediately after such issuance the value of the Fund’s total net assets was at least 200% of the liquidation value of the outstanding preferred shares plus the aggregate amount of any senior securities representing indebtedness (as defined in the 1940 Act) held by the Fund as described above ( i.e. , such liquidation value plus the aggregate amount of senior securities representing indebtedness may not exceed 50% of the Fund’s total net assets). In addition, if the Fund issues preferred shares, the 1940 Act prohibits the declaration of any dividend (except a dividend payable in common shares of the Fund) or distribution upon the Common Shares of the Fund, or purchase of any such Common Shares, unless in every such case the preferred share class has, at the time of the declaration of any such dividend or distribution or at the time of any such purchase, an asset coverage of at least 200% (as described above) after deducting the amount of such dividend, distribution, or purchase price, as the case may be. The 1940 Act requires that the holders of any preferred shares, voting separately as a single class, have the right to elect two Trustees at all times, and, if dividends on preferred shares shall be unpaid in an amount equal to two full years’ dividends on such preferred shares, to elect a majority of the Trustees. The Fund might also be subject to certain restrictions imposed by guidelines of one or more rating agencies that may issue ratings for preferred shares issued by the Fund. These guidelines may impose asset coverage or portfolio composition requirements that are more stringent than those imposed on the Fund by the 1940 Act.

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PRINCIPAL RISKS OF THE FUND

The net asset value and the market price of the Common Shares will fluctuate with and be affected by, among other things, various principal risks of the Fund and its investments which are summarized below.

No Prior History

The Fund is a newly organized, non-diversified, closed-end management investment company with no history of operations.

Market Discount Risk

As with any stock, the price of the Fund’s Common Shares will fluctuate with market conditions and other factors. If you sell your Common Shares, the price received may be more or less than your original investment. Net asset value will be reduced immediately following the initial offering by a sales load and offering expenses paid or reimbursed by the Fund. The Common Shares are designed for long-term investors and should not be treated as trading vehicles. Shares of closed-end management investment companies frequently trade at a discount from their net asset value. The Common Shares may trade at a price that is less than the initial offering price. This risk may be greater for investors who sell their shares relatively shortly after completion of the initial offering.

Market Risk

The market price of securities owned by the Fund may go up or down, sometimes rapidly or unpredictably. Securities may decline in value due to factors affecting securities markets generally or particular industries represented in the securities markets. The value of a security may decline due to general market conditions that are not specifically related to a particular company, such as real or perceived adverse economic conditions, changes in the general outlook for corporate earnings, changes in interest or currency rates or adverse investor sentiment generally. They may also decline due to factors that affect a particular industry or industries, such as labor shortages or increased production costs and competitive conditions within an industry. During a general downturn in the securities markets, multiple asset classes may decline in value simultaneously.

Asset Allocation Risk

The Fund’s investment performance depends upon how its assets are allocated and reallocated. A principal risk of investing in the Fund is that PIMCO may make less than optimal or poor asset allocation decisions. PIMCO employs an active approach to allocation among multiple fixed-income sectors, but there is no guarantee that such allocation techniques will produce the desired results. It is possible that PIMCO will focus on an investment that performs poorly or underperforms other investments under various market conditions. You could lose money on your investment in the Fund as a result of these allocation decisions.

Issuer Risk

The value of securities may decline for a number of reasons that directly relate to the issuer, such as its financial strength, management performance, financial leverage and reduced demand for the issuer’s goods and services, as well as the historical and prospective earnings of the issuer and the value of its assets.

Issuer Non-Diversification Risk

The Fund is a “non-diversified” investment company and therefore may invest a greater percentage of its assets in the securities of a single issuer or a limited number of issuers than funds that are “diversified.” Accordingly, the Fund is more susceptible to risks associated with a single economic, political or regulatory occurrence than a diversified fund might be. Some of the issuers in which the Fund invests may also present substantial credit or other risks. The Fund will be subject to similar risks to the extent that it enters into derivative transactions with a limited number of counterparties.

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Management Risk

The Fund is subject to management risk because it is an actively managed portfolio. PIMCO and the portfolio managers will apply investment techniques and risk analyses in making investment decisions for the Fund, but there can be no guarantee that these decisions will produce the desired results.

Interest Rate Risk

Generally, when market interest rates rise, the prices of debt obligations fall, and vice versa. Interest rate risk is the risk that debt obligations and other instruments in the Fund’s portfolio will decline in value because of increases in market interest rates. This risk may be particularly acute because market interest rates are currently at historically low levels. The prices of long-term debt obligations generally fluctuate more than prices of short-term debt obligations as interest rates change. Because the Fund’s normal average portfolio duration range extends up to eight years (normally in the range of 0 to 8 years), as calculated by the Sub-Adviser, the Fund’s net asset value and market price per Common Share will tend to fluctuate more in response to changes in market interest rates than if the Fund invested mainly in short-term debt securities. During periods of rising interest rates, the average life of certain types of securities may be extended due to lower than expected rates of prepayments, which could cause the securities’ durations to extend and expose the securities to more price volatility. This may lock in a below market yield, increase the security’s duration and reduce the security’s value. In addition to directly affecting debt securities, rising interest rates may also have an adverse effect on the value of any equity securities held by the Fund. The Fund’s duration strategy may entail maintaining a negative average portfolio duration from time to time, which would potentially benefit the portfolio in an environment of rising market interest rates, but would generally adversely impact the portfolio in an environment of falling market interest rates. The Fund’s use of leverage will tend to increase Common Share interest rate risk. PIMCO may utilize certain strategies, including without limitation investments in structured notes or interest rate futures contracts or swap, cap, floor or collar transactions, for the purpose of reducing the interest rate sensitivity of the Fund’s portfolio, although there is no assurance that it will do so or that, if used, such strategies will be successful.

The Fund may invest in variable- and floating-rate debt instruments, which generally are less sensitive to interest rate changes than longer duration fixed-rate instruments, but may decline in value in response to rising interest rates if, for example, the rates at which they pay interest do not rise as much, or as quickly, as market interest rates in general. Conversely, variable- and floating-rate instruments generally will not increase in value if interest rates decline. The Fund also may invest in inverse floating-rate debt securities, which may decrease in value if interest rates increase, and which also may exhibit greater price volatility than fixed-rate debt obligations with similar credit quality. To the extent the Fund holds variable- or floating-rate instruments, a decrease (or, in the case of inverse floating-rate securities, an increase) in market interest rates will adversely affect the income received from such securities and the net asset value of the Fund’s Common Shares.

Credit Risk

Credit risk is the risk that one or more of the Fund’s investments in debt securities or other instruments will decline in price, or fail to pay interest, liquidation value or principal when due, because the issuer of the obligation or the issuer of a reference security experiences an actual or perceived decline in its financial status.

Mortgage-Related and Other Asset-Backed Securities Risk

The Fund may invest in a variety of mortgage-related and other asset-backed securities issued by government agencies or other governmental entities or by private originators or issuers.

As a matter of fundamental policy, the Fund will normally invest at least 25% of its total assets in privately-issued (commonly known as “non-agency”) mortgage-related securities.

The mortgage-related securities in which the Fund may invest include, without limitation, mortgage pass-through securities, collateralized mortgage obligations (“CMOs”), commercial or residential mortgage-backed securities, mortgage dollar rolls, CMO residuals, stripped mortgage-backed securities (“SMBSs”) and other

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securities that directly or indirectly represent a participation in, or are secured by and payable from, mortgage loans on real property. The Fund may also invest in other types of asset-backed securities, including collateralized debt obligations (“CDOs”), which include collateralized bond obligations (“CBOs”), collateralized loan obligations (“CLOs”) and other similarly structured securities. See “Portfolio Contents––Mortgage-Related and Other Asset-Backed Securities” in this prospectus and “Investment Objectives and Policies––Mortgage-Related and Other Asset-Backed Securities” in the Statement of Additional Information for a description of the various mortgage-related and other asset-backed securities in which the Fund may invest and their related risks.

Mortgage-related and other asset-backed securities often involve risks that are different from or more acute than risks associated with other types of debt instruments. For instance, these securities may be particularly sensitive to changes in prevailing interest rates. Rising interest rates tend to extend the duration of mortgage-related securities, making them more sensitive to changes in interest rates, and may reduce the market value of the securities. This is known as extension risk. In addition, mortgage-related securities are subject to prepayment risk—the risk that borrowers may pay off their mortgages sooner than expected, particularly when interest rates decline. This can reduce the Fund’s returns because the Fund may have to reinvest that money at lower prevailing interest rates. For instance, the Fund may invest in stripped mortgage-backed securities with respect to which one class receives all of the interest from the mortgage assets (the interest-only, or “IO” class), while the other class receives all of the principal (the principal-only, or “PO” class). The yield to maturity on an IO class is extremely sensitive to the rate of principal payments (including prepayments) on the underlying mortgage assets, and a rapid rate of principal payments may have a material adverse effect on the Fund’s yield to maturity from these investments.

The Fund’s investments in other asset-backed securities are subject to risks similar to those associated with mortgage-related securities, as well as additional risks associated with their structure and the nature of the assets underlying the security and the servicing of those assets. For instance, certain CDOs in which the Fund may invest are backed by pools of high-risk, below investment grade debt securities and may involve substantial credit and other risks.

Due to their often complicated structures, various mortgage-related and asset-backed securities may be difficult to value and may constitute illiquid investments.

The value of mortgage-related and other asset-backed securities may be substantially dependent on the servicing of the underlying asset pools, and are therefore subject to risks associated with the negligence by, or defalcation of, their servicers. Furthermore, debtors may be entitled to the protection of a number of state and federal consumer credit laws with respect to these securities, which may give the debtor the right to avoid or reduce payment.

Investments in mortgage-related and other asset-backed securities may involve particularly high levels of risk under current market conditions. See “Principal Risks of the Fund—Mortgage Market/Subprime Risk.” See also “Principal Risks of the Fund—Recent Economic Conditions Risk.”

Mortgage Market/Subprime Risk

The mortgage markets in the United States and in various foreign countries have experienced extreme difficulties over the past few years that may adversely affect the performance and market value of certain of the Fund’s mortgage-related investments. Delinquencies and losses on residential and commercial mortgage loans (especially subprime and second-lien mortgage loans) generally have increased during that period and may continue to increase, and a decline in or flattening of housing and other real property values (as has been experienced during that period and may continue to be experienced in many real estate markets) may exacerbate such delinquencies and losses. Borrowers with adjustable rate mortgage loans are more sensitive to changes in interest rates, which affect their monthly mortgage payments, and may be unable to secure replacement mortgages at comparably low interest rates. Also, a number of mortgage loan originators have experienced serious financial difficulties or bankruptcy in recent periods. Owing largely to the foregoing, reduced investor demand for mortgage loans and mortgage-related securities and increased investor yield requirements have caused limited liquidity in the secondary market for mortgage-related securities, which can adversely affect the market value of mortgage-related securities. It is possible that such limited liquidity in such secondary markets could continue or worsen.

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High Yield Risk

In general, lower rated debt securities carry a greater degree of risk that the issuer will lose its ability to make interest and principal payments, which could have a negative effect on the net asset value of the Fund’s Common Shares or Common Share dividends. Securities of below investment grade quality are regarded as having predominantly speculative characteristics with respect to capacity to pay interest and repay principal, and are commonly referred to as “high yield” securities or “junk bonds.” High yield securities involve a greater risk of default and their prices are generally more volatile and sensitive to actual or perceived negative developments, such as a decline in the issuer’s revenues or revenues of underlying borrowers or a general economic downturn, than are the prices of higher grade securities. Debt securities in the lowest investment grade category also may be considered to possess some speculative characteristics by certain rating agencies. The Fund may purchase distressed securities that are in default or the issuers of which are in bankruptcy, which involve heightened risks. See “Principal Risks of the Fund—Distressed and Defaulted Securities Risk.” An economic downturn could severely affect the ability of issuers (particularly those that are highly leveraged) to service their debt obligations or to repay their obligations upon maturity. Lower-rated securities are generally less liquid than higher-rated securities, which may have an adverse effect on the Fund’s ability to dispose of a particular security. For example, under adverse market or economic conditions, the secondary market for below investment grade securities could contract further, independent of any specific adverse changes in the condition of a particular issuer, and certain securities in the Fund’s portfolio may become illiquid or less liquid. As a result, the Fund could find it more difficult to sell these securities or may be able to sell these securities only at prices lower than if such securities were widely traded. See “Principal Risks of the Fund—Liquidity Risk.” To the extent the Fund focuses on below investment grade debt obligations, PIMCO’s capabilities in analyzing credit quality and associated risks will be particularly important, and there can be no assurance that PIMCO will be successful in this regard. See “Portfolio Contents—High Yield Securities (‘Junk Bonds’)” for additional information. Due to the risks involved in investing in high yield securities, an investment in the Fund should be considered speculative.

The Fund’s credit quality policies apply only at the time a security is purchased, and the Fund is not required to dispose of a security in the event that a rating agency or PIMCO downgrades its assessment of the credit characteristics of a particular issue. In determining whether to retain or sell such a security, PIMCO may consider factors including, but not limited to, PIMCO’s assessment of the credit quality of the issuer of such security, the price at which such security could be sold and the rating, if any, assigned to such security by other rating agencies. Analysis of creditworthiness may be more complex for issuers of high yield securities than for issuers of higher quality debt securities.

Distressed and Defaulted Securities Risk

As noted above, the Fund may invest in the debt securities of financially distressed issuers, including those that are in default or the issuers of which are in bankruptcy. Investments in the securities of financially distressed issuers involve substantial risks. These securities may present a substantial risk of default or may be in default at the time of investment. The Fund may incur additional expenses to the extent it is required to seek recovery upon a default in the payment of principal or interest on its portfolio holdings. In any reorganization or liquidation proceeding relating to an investment, the Fund may lose its entire investment or may be required to accept cash or securities with a value substantially less than its original investment. Among the risks inherent in investments in a troubled issuer is that it frequently may be difficult to obtain information as to the true financial condition of such issuer. PIMCO’s judgments about the credit quality of a financially distressed issuer and the relative value of its securities may prove to be wrong.

Municipal Bond Risk

Investing in the municipal bond market involves the risks of investing in debt securities generally and certain other risks. The amount of public information available about the municipal bonds in which the Fund may invest is generally less than that for corporate equities or bonds, and the investment performance of the Fund’s investment in municipal bonds may therefore be more dependent on the analytical abilities of PIMCO than its

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investments in taxable bonds. The secondary market for municipal bonds also tends to be less well developed or liquid than many other securities markets, which may adversely affect the Fund’s ability to sell municipal bonds at attractive prices.

The ability of municipal issuers to make timely payments of interest and principal may be diminished during general economic downturns, by litigation, legislation or political events, or by the bankruptcy of the issuer. Laws, referenda, ordinances or regulations enacted in the future by Congress or state legislatures or the applicable governmental entity could extend the time for payment of principal and/or interest, or impose other constraints on enforcement of such obligations, or on the ability of municipal issuers to levy taxes. Issuers of municipal securities also might seek protection under the bankruptcy laws. In the event of bankruptcy of such an issuer, the Fund could experience delays in collecting principal and interest and the Fund may not, in all circumstances, be able to collect all principal and interest to which it is entitled. To enforce its rights in the event of a default in the payment of interest or repayment of principal, or both, the Fund may take possession of and manage the assets securing the issuer’s obligations on such securities, which may increase the Fund’s operating expenses.

The Fund may invest in revenue bonds, which are typically issued to fund a wide variety of capital projects including electric, gas, water and sewer systems; highways, bridges and tunnels; port and airport facilities; colleges and universities; and hospitals. Because the principal security for a revenue bond is generally the net revenues derived from a particular facility or group of facilities or, in some cases, from the proceeds of a special excise or other specific revenue source, there is no guarantee that the particular project will generate enough revenue to pay its obligations, in which case the Fund’s performance may be adversely affected.

Inflation-Indexed Security Risk

Inflation-indexed debt securities are subject to the effects of changes in market interest rates caused by factors other than inflation (real interest rates). In general, the value of an inflation-indexed security, including Treasury Inflation-Protected Securities (“TIPS”), tends to decrease when real interest rates increase and can increase when real interest rates decrease. Thus generally, during periods of rising inflation, the value of inflation-indexed securities will tend to increase and during periods of deflation, their value will tend to decrease. Interest payments on inflation-indexed securities are unpredictable and will fluctuate as the principal and interest are adjusted for inflation. There can be no assurance that the inflation index used ( i.e. , the Consumer Price Index for All Urban Consumers (“CPI”)) will accurately measure the real rate of inflation in the prices of goods and services. Increases in the principal value of TIPS due to inflation are considered taxable ordinary income for the amount of the increase in the calendar year. Any increase in the principal amount of an inflation-indexed debt security will be considered taxable ordinary income, even though the Fund will not receive the principal until maturity. In order to receive the special treatment accorded to “regulated investment companies” (“RICs”) and their shareholders under the Internal Revenue Code of 1986, as amended (the “Code”) and to avoid U.S. federal income and/or excise taxes at the Fund level, the Fund may be required to distribute this income to shareholders in the tax year in which the income is recognized (without a corresponding receipt of cash). Therefore, the Fund may be required to pay out as an income distribution in any such tax year an amount greater than the total amount of cash income the Fund actually received, and to sell portfolio securities, including at potentially disadvantageous times or prices, to obtain cash needed for these income distributions. Additionally, a CPI swap can potentially lose value if the realized rate of inflation over the life of the swap is less than the fixed market implied inflation rate (fixed breakeven rate) that the investor agrees to pay at the initiation of the swap. With municipal inflation-indexed securities, the inflation adjustment is integrated into the coupon payment. For municipal inflation-indexed securities, there is no adjustment to the principal value. Because municipal inflation-indexed securities are a small component of the municipal bond market, they may be less liquid than conventional municipal bonds.

Senior Debt Risk

Because it may invest in below investment-grade senior debt, the Fund may be subject to greater levels of credit risk than funds that do not invest in such debt. The Fund may also be subject to greater levels of liquidity

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risk than funds that do not invest in senior debt. Restrictions on transfers in loan agreements, a lack of publicly available information and other factors may, in certain instances, make senior debt more difficult to sell at an advantageous time or price than other types of securities or instruments. Additionally, if the issuer of senior debt prepays, the Fund will have to consider reinvesting the proceeds in other senior debt or similar instruments that may pay lower interest rates.

Loan Participations and Assignments Risk

The Fund’s investments in fixed and floating rate loans arranged through private negotiations between an issuer and one or more financial institutions may be in the form of participations in loans or assignments of all or a portion of loans from third parties. In connection with purchasing loan participations, the Fund generally will have no right to enforce compliance by the borrower with the terms of the loan agreement relating to the loan, nor any rights of set-off against the borrower, and the Fund may not directly benefit from any collateral supporting the loan in which it has purchased the loan participation. As a result, the Fund may be subject to the credit risk of both the borrower and the lender that is selling the participation. In the event of the insolvency of the lender selling a participation, the Fund may be treated as a general creditor of the lender and may not benefit from any set-off between the lender and the borrower. Certain loan participations may be structured in a manner designed to prevent purchasers of participations from being subject to the credit risk of the lender with respect to the participation, but even under such a structure, in the event of the lender’s insolvency, the lender’s servicing of the participation may be delayed and the assignability of the participation impaired.

The Fund may have difficulty disposing of loans and loan participations because to do so it will have to assign or sell such securities to a third party. Because there is no liquid market for many such securities, the Fund anticipates that such securities could be sold only to a limited number of institutional investors. The lack of a liquid secondary market may have an adverse impact on the value of such securities and the Fund’s ability to dispose of particular loans and loan participations when that would be desirable, including in response to a specific economic event such as a deterioration in the creditworthiness of the borrower. The lack of a liquid secondary market for loans and loan participations also may make it more difficult for the Fund to assign a value to these securities for purposes of valuing the Fund’s portfolio.

Reinvestment Risk

Income from the Fund’s portfolio will decline if and when the Fund invests the proceeds from matured, traded or called debt obligations at market interest rates that are below the portfolio’s current earnings rate. For instance, during periods of declining interest rates, an issuer of debt obligations may exercise an option to redeem securities prior to maturity, forcing the Fund to invest in lower-yielding securities. The Fund also may choose to sell higher yielding portfolio securities and to purchase lower yielding securities to achieve greater portfolio diversification, because the portfolio manager believes the current holdings are overvalued or for other investment-related reasons. A decline in income received by the Fund from its investments is likely to have a negative effect on dividend levels and the market price, net asset value and/or overall return of the Common Shares.

Foreign (Non-U.S.) Investment Risk

The Fund may invest without limit in securities of foreign (non-U.S.) issuers and securities traded principally outside of the United States. The Fund’s investments in and exposure to foreign securities involve special risks.

For example, the value of these investments may decline in response to unfavorable political and legal developments, unreliable or untimely information or economic and financial instability. Foreign securities may experience more rapid and extreme changes in value than investments in securities of U.S. issuers. The securities markets of many foreign countries are relatively small, with a limited number of companies representing a small number of industries. Issuers of foreign securities are usually not subject to the same degree of regulation as U.S. issuers. Reporting, accounting , auditing and custody standards of foreign countries differ, in some cases significantly, from U.S. standards. Also, nationalization, expropriation or other confiscation, currency blockage, political changes or diplomatic developments could adversely affect the Fund’s investments in foreign securities.

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In the event of nationalization, expropriation or other confiscation, the Fund could lose its entire investment in foreign securities. To the extent that the Fund invests a significant portion of its assets in a particular foreign country or a concentrated geographic area (such as Asia or South America), the Fund will generally have more exposure to regional economic risks associated with foreign investments. Also, adverse conditions in a certain region can adversely affect securities from other countries whose economies appear to be unrelated. The costs of investing in foreign countries frequently are higher than the costs of investing in the United States. Additionally, investments in securities of foreign issuers may be denominated in foreign currencies, subjecting the Fund to foreign currency risk. See “Principal Risks of the Fund—Foreign Currency Risk.”

Emerging Markets Risk

The Fund may normally invest up to 40% of its total assets in securities of issuers economically tied to “emerging market” countries. Foreign investment risk may be particularly high to the extent that the Fund invests in securities of issuers based in or doing business in emerging market countries or invests in securities denominated in the currencies of emerging market countries. Investing in securities of issuers based in or doing business in emerging markets entails all of the risks of investing in foreign securities noted above, but to a heightened degree.

Investments in emerging market countries pose a greater degree of systemic risk, i.e. , the risk of a cascading collapse of multiple institutions within a country, and even multiple national economies. The inter-relatedness of economic and financial institutions within and among emerging market economies has deepened over the years, with the effect that institutional failures and/or economic difficulties that are of initially limited scope may spread throughout a country, a region or even among all or most emerging market countries. This may undermine any attempt by the Fund to reduce risk through geographic diversification of its portfolio investments among emerging market countries.

There is a heightened possibility of imposition of withholding taxes on interest or dividend income generated from emerging market securities. Governments of emerging market countries may engage in confiscatory taxation or expropriation of income and/or assets to raise revenues or to pursue a domestic political agenda. In the past, emerging market countries have nationalized assets, companies and even entire sectors, including the assets of foreign investors, with inadequate or no compensation to the prior owners. There can be no assurance that the Fund will not suffer a loss of any or all of its investments or, interest or dividends thereon, due to adverse fiscal or other policy changes in emerging market countries.

There is also a greater risk that an emerging market government may take action that impedes or prevents the Fund from taking income and/or capital gains earned in the local currency and converting into U.S. dollars ( i.e. , “repatriating” local currency investments or profits). Certain emerging market countries have sought to maintain foreign exchange reserves and/or address the economic volatility and dislocations caused by the large international capital flows by controlling or restricting the conversion of the local currency into other currencies. This risk tends to become more acute when economic conditions otherwise worsen. There can be no assurance that if the Fund earns income or capital gains in an emerging market currency or PIMCO otherwise seeks to withdraw the Fund’s investments from a given emerging market country, capital controls imposed by such country will not prevent, or cause significant expense in, doing so.

Bankruptcy law and creditor reorganization processes may differ substantially from those in the United States, resulting in greater uncertainty as to the rights of creditors, the enforceability of such rights, reorganization timing and the classification, seniority and treatment of claims. In certain emerging market countries, although bankruptcy laws have been enacted, the process for reorganization remains highly uncertain. In addition, it may be impossible to seek legal redress against an issuer that is a sovereign state.

Other heightened risks associated with emerging markets investments include without limitation: (i) risks due to less social, political and economic stability; (ii) the smaller size of the market for such securities and a lower volume of trading, resulting in a lack of liquidity and in price volatility; (iii) certain national policies which may restrict the Fund’s investment opportunities, including restrictions on investing in issuers or industries deemed sensitive to relevant national interests and requirements that government approval be obtained prior to investment by foreign persons; (iv) certain national policies that may restrict the Fund’s repatriation of

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investment income, capital or the proceeds of sales of securities, including temporary restrictions on foreign capital remittances; (v) the lack of uniform accounting and auditing standards and/or standards that may be significantly different from the standards required in the United States; (vi) less publicly available financial and other information regarding issuers; (vii) potential difficulties in enforcing contractual obligations; and (viii) higher rates of inflation, higher interest rates and other economic concerns. The Fund may invest to a substantial extent in emerging market securities that are denominated in local currencies, subjecting the Fund to a greater degree of foreign currency risk. See “Principal Risks of the Fund—Foreign Currency Risk.” Also, investing in emerging market countries may entail purchases of securities of issuers that are insolvent, bankrupt, in default or otherwise of questionable ability to satisfy their payment obligations as they become due, subjecting the Fund to a greater amount of credit risk and/or high yield risk. See “Principal Risks of the Fund—Credit Risk” and “Principal Risks of the Fund—High Yield Risk.”

Foreign Currency Risk

The Fund may engage in practices and strategies that will result in exposure to fluctuations in foreign exchange rates, in which case the Fund will be subject to foreign currency risk. The Fund’s Common Shares are priced in U.S. dollars and the distributions paid by the Fund to Common Shareholders are paid in U.S. dollars. However, a substantial portion of the Fund’s assets may be denominated in foreign (non-U.S.) currencies and income received by the Fund from many foreign debt obligations will be paid in foreign currencies. The Fund may also invest in or gain exposure to foreign currencies themselves in order to gain local currency exposure with respect to foreign instruments denominated in other currencies or for other investment or hedging purposes. The Fund’s investments in or exposure to foreign currencies or in securities or instruments that trade, or receive revenues, in foreign currencies are subject to the risk that those currencies will decline in value relative to the U.S. dollar or, in the case of hedging positions (if utilized), that the U.S. dollar will decline in value relative to the currency being hedged. Currency rates in foreign countries may fluctuate significantly over short periods of time for a number of reasons, including changes in interest rates, rates of inflation, balance of payments and governmental surpluses or deficits, intervention (or the failure to intervene) by U.S. or foreign governments, central banks or supranational entities such as the International Monetary Fund, or by the imposition of currency controls or other political developments in the U.S. or abroad. These fluctuations may have a significant adverse impact on the value of the Fund’s portfolio and/or the level of Fund distributions made to Common Shareholders. As noted above, the Fund may (but is not required to) seek exposure to foreign currencies, or attempt to hedge exposure to reduce the risk of loss due to fluctuations in currency exchange rates relative to the U.S. dollar. There is no assurance, however, that these strategies will be available or will be used by the Fund or, if used, that they will be successful.

Redenomination Risk

Continuing uncertainty as to the status of the euro and the European Monetary Union (the “EMU”) has created significant volatility in currency and financial markets generally. Any partial or complete dissolution of the EMU could have significant adverse effects on currency and financial markets, and on the values of the Fund’s portfolio investments. If one or more EMU countries were to stop using the euro as its primary currency, the Fund’s investments in such countries may be redenominated into a different or newly adopted currency. As a result, the value of those investments could decline significantly and unpredictably. In addition, securities or other investments that are redenominated may be subject to foreign currency risk, liquidity risk and valuation risk to a greater extent than similar investments currently denominated in euros. See “Principal Risks of the Fund—Foreign Currency Risk,” “Principal Risks of the Fund—Liquidity Risk,” and “Principal Risks of the Fund—Valuation Risk.” To the extent a currency used for redenomination purposes is not specified in respect of certain EMU-related investments, or should the euro cease to be used entirely, the currency in which such investments are denominated may be unclear, making such investments particularly difficult to value or dispose of. The Fund may incur additional expenses to the extent it is required to seek judicial or other clarification of the denomination or value of such securities.

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Real Estate Risk

To the extent that the Fund invests in real estate related investments, including REITs or real-estate linked derivative instruments, it will be subject to the risks associated with owning real estate and with the real estate industry generally. These include difficulties in valuing and disposing of real estate, the possibility of declines in the value of real estate, risks related to general and local economic conditions, the possibility of adverse changes in the climate for real estate, environmental liability risks, the risk of increases in property taxes and operating expenses, possible adverse changes in zoning laws, the risk of casualty or condemnation losses, limitations on rents, the possibility of adverse changes in interest rates and in the credit markets and the possibility of borrowers paying off mortgages sooner than expected, which may lead to reinvestment of assets at lower prevailing interest rates. To the extent that the Fund invests in REITs, it will also be subject to the risk that a REIT may default on its obligations or go bankrupt. By investing in REITs indirectly through the Fund, a shareholder will bear not only his or her proportionate share of the expenses of the Fund, but also, indirectly, similar expenses of the REITs. The Fund’s investments in REITs could cause the Fund to recognize income in excess of cash received from those securities and, as a result, the Fund may be required to sell portfolio securities, including when it is not advantageous to do so, in order to make distributions.

U.S. Government Securities Risk

The Fund may invest in debt securities issued or guaranteed by agencies, instrumentalities and sponsored enterprises of the U.S. Government. Some U.S. Government securities, such as U.S. Treasury bills, notes and bonds, and mortgage-related securities guaranteed by the Government National Mortgage Association (“GNMA”), are supported by the full faith and credit of the United States; others, such as those of the Federal Home Loan Banks or the Federal Home Loan Mortgage Corporation (“FHLMC”), are supported by the right of the issuer to borrow from the U.S. Treasury; others, such as those of the Federal National Mortgage Association (“FNMA”), are supported by the discretionary authority of the U.S. Government to purchase the agency’s obligations; and still others, such as those of the Student Loan Marketing Association, are supported only by the credit of the issuing agency, instrumentality or enterprise. Although U.S. Government-sponsored enterprises, such as the Federal Home Loan Banks, FHLMC, FNMA and the Student Loan Marketing Association, may be chartered or sponsored by Congress, they are not funded by Congressional appropriations, and their securities are not issued by the U.S. Treasury or supported by the full faith and credit of the U.S. Government and involve increased credit risks. Although legislation has been enacted to support certain government sponsored entities, including the Federal Home Loan Banks, FHLMC and FNMA, there is no assurance that the obligations of such entities will be satisfied in full, or that such obligations will not decrease in value or default. It is difficult, if not impossible, to predict the future political, regulatory or economic changes that could impact the government sponsored entities and the values of their related securities or obligations. In addition, certain governmental entities, including FNMA and FHLMC, have been subject to regulatory scrutiny regarding their accounting policies and practices and other concerns that may result in legislation, changes in regulatory oversight and/or other consequences that could adversely affect the credit quality, availability or investment character of securities issued by these entities. See “Investment Objectives and Policies—Mortgage-Related and Other Asset-Backed Securities” in the Statement of Additional Information.

U.S. Government debt securities generally involve lower levels of credit risk than other types of debt securities of similar maturities, although, as a result, the yields available from U.S. Government debt securities are generally lower than the yields available from such other securities. Like other debt securities, the values of U.S. Government securities change as interest rates fluctuate. Fluctuations in the value of portfolio securities will not affect interest income on existing portfolio securities but will be reflected in the Fund’s net asset value.

Foreign (Non-U.S.) Government Securities Risk

The Fund’s investments in debt obligations of foreign (non-U.S.) governments or their sub-divisions, agencies and government sponsored enterprises and obligations of international agencies and supranational entities (together “Foreign Government Securities”) can involve a high degree of risk. The foreign governmental entity that controls the repayment of debt may not be able or willing to repay the principal and/or interest when

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due in accordance with the terms of such debt. A governmental entity’s willingness or ability to repay principal and interest due in a timely manner may be affected by, among other factors, its cash flow situation, the extent of its foreign reserves, the availability of sufficient foreign exchange on the date a payment is due, the relative size of the debt service burden to the economy as a whole, the governmental entity’s policy towards the International Monetary Fund and the political constraints to which a governmental entity may be subject. Foreign governmental entities also may be dependent on expected disbursements from other governments, multilateral agencies and others abroad to reduce principal and interest arrearages on their debt. The commitment on the part of these governments, agencies and others to make such disbursements may be conditioned on the implementation of economic reforms and/or economic performance and the timely service of such debtor’s obligations. Failure to implement such reforms, achieve such levels of economic performance or repay principal or interest when due may result in the cancellation of such third parties’ commitments to lend funds to the foreign governmental entity, which may further impair such debtor’s ability or willingness to timely service its debts. Consequently, foreign governmental entities may default on their debt. Holders of Foreign Government Securities may be requested to participate in the rescheduling of such debt and to extend further loans to governmental entities. In the event of a default by a governmental entity, there may be few or no effective legal remedies for collecting on such debt. These risks are particularly severe with respect to the Fund’s investments in Foreign Government Securities of emerging market countries. See “Principal Risks of the Fund—Emerging Markets Risk.” Among other risks, if the Fund’s investments in Foreign Government Securities issued by an emerging market country need to be liquidated quickly, the Fund could sustain significant transaction costs. Also, governments in many emerging market countries participate to a significant degree in their economies and securities markets, which may impair investment and economic growth, and which may in turn diminish the value of the Fund’s holdings in emerging market Foreign Government Securities and the currencies in which they are denominated and/or pay revenues.

Convertible Securities Risk

Convertible securities generally offer lower interest or dividend yields than non-convertible debt securities of similar quality. The market values of convertible securities tend to decline as interest rates increase and, conversely, to increase as interest rates decline. However, a convertible security’s market value tends to reflect the market price of the common stock of the issuing company when that stock price approaches or is greater than the convertible security’s “conversion price.” The conversion price is defined as the predetermined price at which the convertible security could be exchanged for the associated stock. As the market price of the underlying common stock declines, the price of the convertible security tends to be influenced more by the yield of the convertible security. Thus, it may not decline in price to the same extent as the underlying common stock. In the event of a liquidation of the issuing company, holders of convertible securities would be paid before the company’s common stockholders but after holders of any senior debt obligations of the company. Consequently, the issuer’s convertible securities generally entail less risk than its common stock but more risk than its debt obligations.

The Fund may invest in synthetic convertible securities, which are created through a combination of separate securities that possess the two principal characteristics of a traditional convertible security, i.e. , an income-producing security (“income-producing component”) and the right to acquire an equity security (“convertible component”). The income-producing component is achieved by investing in non-convertible, income-producing securities such as bonds, preferred stocks and money market instruments. The convertible component is achieved by purchasing warrants or options to buy common stock at a certain exercise price, or options on a stock index. The values of synthetic convertible securities will respond differently to market fluctuations than a traditional convertible security because a synthetic convertible is composed of two or more separate securities or instruments, each with its own market value. Synthetic convertible securities are also subject to the risks associated with derivatives. See “Principal Risks of the Fund—Derivatives Risk.” In addition, if the value of the underlying common stock or the level of the index involved in the convertible element falls below the strike price of the warrant or option, the warrant or option may lose all value.

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Valuation Risk

When market quotations are not readily available or are deemed to be unreliable, the Fund values its investments at fair value as determined in good faith pursuant to policies and procedures approved by the Board of Trustees. See “Net Asset Value.” Fair value pricing may require subjective determinations about the value of a security or other asset. As a result, there can be no assurance that fair value pricing will result in adjustments to the prices of securities or other assets, or that fair value pricing will reflect actual market value, and it is possible that the fair value determined for a security or other asset will be materially different from quoted or published prices, from the prices used by others for the same security or other asset and/or from the value that actually could be or is realized upon the sale of that security or other asset.

Leverage Risk

The Fund’s use of leverage (as described under “Leverage” in the body of this prospectus) creates the opportunity for increased Common Share net income, but also creates special risks for Common Shareholders. To the extent used, there is no assurance that the Fund’s leveraging strategies will be successful. Leverage is a speculative technique that may expose the Fund to greater risk and increased costs. The net proceeds that the Fund obtains from its use of reverse repurchase agreements, dollar rolls and/or borrowings (as well as from any future issuance of preferred shares) will be invested in accordance with the Fund’s investment objectives and policies as described in this prospectus. It is anticipated that interest expense payable by the Fund with respect to its reverse repurchase agreements, dollar rolls and borrowings (or dividends payable with respect to any outstanding preferred shares) will be based on shorter-term interest rates that would be periodically reset. So long as the Fund’s portfolio investments provide a higher rate of return (net of applicable Fund expenses) than the interest rates and other costs to the Fund of such leverage, the investment of the proceeds thereof will generate more income than will be needed to pay the costs of the leverage. If so, and all other things being equal, the excess may be used to pay higher dividends to Common Shareholders than if the Fund were not so leveraged. If, however, shorter-term interest rates rise relative to the rate of return on the Fund’s portfolio, the interest and other costs to the Fund of leverage (including interest expenses on reverse repurchase agreements, dollar rolls and borrowings and the dividend rate on any outstanding preferred shares) could exceed the rate of return on the debt obligations and other investments held by the Fund, thereby reducing return to Common Shareholders. In addition, fees and expenses of any form of leverage used by the Fund will be borne entirely by the Common Shareholders (and not by preferred shareholders, if any) and will reduce the investment return of the Common Shares. Therefore, there can be no assurance that the Fund’s use of leverage will result in a higher yield on the Common Shares, and it may result in losses. In addition, any preferred shares issued by the Fund are expected to pay cumulative dividends, which may tend to increase leverage risk.

Leverage creates several major types of risks for Common Shareholders, including:

In addition, the counterparties to the Fund’s leveraging transactions and any preferred shareholders of the Fund will have priority of payment over the Fund’s Common Shareholders.

The use by the Fund of reverse repurchase agreements and dollar rolls to obtain leverage also involves special risks. For instance, the market value of the securities that the Fund is obligated to repurchase under a reverse repurchase agreement or dollar roll may decline below the repurchase price. See “The Fund’s Investment Objectives and Policies––Portfolio Contents and Other Information––Reverse Repurchase Agreements and Dollar Rolls.”

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In addition to reverse repurchase agreements, dollar rolls and/or borrowings (or a future issuance of preferred shares), the Fund may engage in other transactions that may give rise to a form of leverage including, among others, futures and forward contracts (including foreign currency exchange contracts), credit default swaps, total return swaps and other derivative transactions, loans of portfolio securities, short sales and when-issued, delayed delivery and forward commitment transactions). The Fund’s use of such transactions give rise to associated leverage risks described above, and may adversely affect the Fund’s income, distributions and total returns to Common Shareholders. The Fund manages some of its derivative positions by segregating an amount of cash or liquid securities equal to the face value or the market value, as applicable, of those positions. See “Principal Risks of the Fund—Segregation and Coverage Risk.” The Fund may also offset derivatives positions against one another or against other assets to manage effective market exposure resulting from derivatives in its portfolio. To the extent that any offsetting positions do not behave in relation to one another as expected, the Fund may perform as if it is leveraged through use of these derivative strategies. See “Leverage.”

Because the fees received by the Investment Manager and the Sub-Adviser are based on the total managed assets of the Fund (including assets attributable to any reverse repurchase agreements, dollar rolls, borrowings and preferred shares that may be outstanding), the Investment Manager and the Sub-Adviser have a financial incentive for the Fund to use reverse repurchase agreements, dollar rolls and borrowings or to issue preferred shares, which may create a conflict of interest between the Investment Manager and the Sub-Adviser, on the one hand, and the Common Shareholders, on the other hand.

Segregation and Coverage Risk

Certain portfolio management techniques, such as, among other things, using reverse repurchase agreements or dollar rolls, purchasing securities on a when-issued or delayed delivery basis, entering into swap agreements, futures contracts or other derivative transactions, or engaging in short sales, may be considered senior securities unless steps are taken to segregate the Fund’s assets or otherwise cover its obligations. To avoid having these instruments considered senior securities, the Fund may segregate liquid assets with a value equal (on a daily mark-to-market basis) to its obligations under these types of leveraged transactions, enter into offsetting transactions or otherwise cover such transactions. See “Leverage” in this prospectus. The Fund may be unable to use such segregated assets for certain other purposes, which could result in the Fund earning a lower return on its portfolio than it might otherwise earn if it did not have to segregate those assets in respect of or otherwise cover such portfolio positions. To the extent the Fund’s assets are segregated or committed as cover, it could limit the Fund’s investment flexibility. Segregating assets and covering positions will not limit or offset losses on related positions.

Focused Investment Risk

To the extent that the Fund focuses its investments in a particular industry, the net asset value of the common shares will be more susceptible to events or factors affecting companies in that industry. These may include, but are not limited to, governmental regulation, inflation, rising interest rates, cost increases in raw materials, fuel and other operating expenses, technological innovations that may render existing products and equipment obsolete, competition from new entrants, high research and development costs, increased costs associated with compliance with environmental or other regulation and other economic, market, political or other developments specific to that industry. Also, the Fund may invest a substantial portion of its assets in companies in related sectors that may share common characteristics, are often subject to similar business risks and regulatory burdens and whose securities may react similarly to the types of events and factors described above, which will subject the Fund to greater risk. The Fund also will be subject to focused investment risk to the extent that it invests a substantial portion of its assets in a particular country or geographic region. See “Principal Risks of the Fund—Foreign (Non-U.S.) Investment Risk,” “Principal Risks of the Fund—Emerging Markets Risk” and “Principal Risks of the Fund—Foreign Currency Risk.”

As a matter of fundamental policy, the Fund will normally invest at least 25% of its total assets in privately-issued (commonly known as “non-agency”) mortgage-related securities, and therefore will be particularly

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susceptible to the risks associated with these securities. See “Principal Risks of the Fund—Mortgage-Related and Other Asset-Backed Securities Risk.”

Derivatives Risk

The Fund may utilize a variety of derivative instruments (both long and short positions) for investment or risk management purposes. The Fund may use derivatives to gain exposure to securities markets in which it may invest ( e.g. , pending investment of the proceeds of this offering in individual securities, as well as on an ongoing basis). The Fund may also use derivatives to add leverage to its portfolio. See “Principal Risks of the Fund—Leverage Risk.” Derivatives transactions that the Fund may utilize include, but are not limited to, purchases or sales of futures and forward contracts (including foreign currency exchange contracts), call and put options, credit default swaps, total return swaps, basis swaps and other swap agreements. The Fund may also have exposure to derivatives, such as interest rate or credit-default swaps, through investment in credit-linked trust certificates and other securities issued by special purpose or structured vehicles. The Fund’s use of derivative instruments involves risks different from, and possibly greater than, the risks associated with investing directly in securities and other traditional investments. Derivatives are subject to a number of risks described elsewhere in this prospectus, such as liquidity risk, interest rate risk, issuer risk, credit risk, leveraging risk, counterparty risk, management risk and, if applicable, smaller company risk. See “Principal Risks of the Fund—Segregation and Coverage Risk.” They also involve the risk of mispricing or improper valuation, the risk of unfavorable or ambiguous documentation and the risk that changes in the value of the derivative may not correlate perfectly with the underlying asset, rate or index. If the Fund invests in a derivative instrument, it could lose more than the principal amount invested. Also, suitable derivative transactions may not be available in all circumstances and there can be no assurance that the Fund will engage in these transactions to reduce exposure to other risks when that would be beneficial. The Fund’s use of derivatives also may increase the amount and affect the character and/or timing of taxes payable by Common Shareholders.

Counterparty Risk

The Fund will be subject to credit risk with respect to the counterparties to the derivative contracts and other instruments entered into by the Fund or held by special purpose or structured vehicles in which the Fund invests. In the event that the Fund enters into a derivative transaction with a counterparty that subsequently becomes insolvent or becomes the subject of a bankruptcy case, the derivative transaction may be terminated in accordance with its terms and the Fund’s ability to realize its rights under the derivative instrument and its ability to distribute the proceeds could be adversely affected. If a counterparty becomes bankrupt or otherwise fails to perform its obligations under a derivative contract due to financial difficulties, the Fund may experience significant delays in obtaining any recovery (including recovery of any collateral it has provided to the counterparty) in a dissolution, assignment for the benefit of creditors, liquidation, winding-up, bankruptcy, or other analogous proceeding. In addition, in the event of the insolvency of a counterparty to a derivative transaction, the derivative transaction would typically be terminated at its fair market value. If the Fund is owed this fair market value in the termination of the derivative transaction and its claim is unsecured, the Fund will be treated as a general creditor of such counterparty, and will not have any claim with respect to any underlying security or asset. The Fund may obtain only a limited recovery or may obtain no recovery in such circumstances.

Equity Securities and Related Market Risk

Subject to the Fund’s investment policies, the Fund may hold common stocks and other equity securities from time to time, including without limitation those it has received through the conversion of a convertible security held by the Fund or in connection with the restructuring of a debt security. The market price of common stocks and other equity securities may go up or down, sometimes rapidly or unpredictably. Equity securities may decline in value due to factors affecting equity securities markets generally, particular industries represented in those markets, or the issuer itself. See “Principal Risks of the Fund—Issuer Risk.” The values of equity securities may decline due to general market conditions that are not specifically related to a particular company, such as real or perceived adverse economic conditions, changes in the general outlook for corporate earnings, changes in

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interest or currency rates or adverse investor sentiment generally. They may also decline due to factors which affect a particular industry or industries, such as labor shortages or increased production costs and competitive conditions within an industry. Equity securities generally have greater price volatility than bonds and other debt securities.

Preferred Securities Risk

In addition to equity securities risk (see “Principal Risks of the Fund—Equity Securities and Related Market Risk”), credit risk (see “Principal Risks of the Fund—Credit Risk”) and possibly high yield risk (see “Principal Risks of the Fund—High Yield Risk”), investment in preferred securities involves certain other risks. Certain preferred securities contain provisions that allow an issuer under certain conditions to skip or defer distributions. If the Fund owns a preferred security that is deferring its distribution, the Fund may be required to include the amount of the deferred distribution in its taxable income for tax purposes despite the fact that it does not currently receive such amount. In order to receive the special treatment accorded to RICs and their shareholders under the Code and to avoid U.S. federal income and/or excise taxes at the Fund level, the Fund may be required to distribute this income to shareholders in the tax year in which the income is recognized (without a corresponding receipt of cash). Therefore, the Fund may be required to pay out as an income distribution in any such tax year an amount greater than the total amount of cash income the Fund actually received, and to sell portfolio securities, including at potentially disadvantageous times or prices, to obtain cash needed for these income distributions. Preferred securities often are subject to legal provisions that allow for redemption in the event of certain tax or legal changes or at the issuer’s call. In the event of redemption, the Fund may not be able to reinvest the proceeds at comparable rates of return. Preferred securities are subordinated to bonds and other debt securities in an issuer’s capital structure in terms of priority for corporate income and liquidation payments, and therefore will be subject to greater credit risk than those debt securities. Preferred securities may trade less frequently and in a more limited volume and may be subject to more abrupt or erratic price movements than many other securities, such as common stocks, corporate debt securities and U.S. Government securities.

Smaller Company Risk

The general risks associated with debt instruments or equity securities are particularly pronounced for securities issued by companies with small market capitalizations. Small capitalization companies involve certain special risks. They are more likely than larger companies to have limited product lines, markets or financial resources, or to depend on a small, inexperienced management group. Securities of smaller companies may trade less frequently and in lesser volume than more widely held securities and their values may fluctuate more sharply than other securities. They may also have limited liquidity. These securities may therefore be more vulnerable to adverse developments than securities of larger companies, and the Fund may have difficulty purchasing or selling securities positions in smaller companies at prevailing market prices. Also, there may be less publicly available information about smaller companies or less market interest in their securities as compared to larger companies. Companies with medium-sized market capitalizations may have risks similar to those of smaller companies.

Confidential Information Access Risk

In managing the Fund, PIMCO may from time to time have the opportunity to receive material, non-public information (“Confidential Information”) about the issuers of certain investments, including, without limitation, senior floating rate loans, other bank loans and related investments being considered for acquisition by the Fund or held in the Fund’s portfolio. For example, a bank issuer of privately placed senior floating rate loans considered by the Fund may offer to provide PIMCO with financial information and related documentation regarding the bank issuer that is not publicly available. Pursuant to applicable policies and procedures, PIMCO may (but is not required to) seek to avoid receipt of Confidential Information from the issuer so as to avoid possible restrictions on its ability to purchase and sell investments on behalf of the Fund and other clients to which such Confidential Information relates ( e.g. , other securities issued by the bank used in the example above). In such circumstances, the Fund (and other PIMCO clients) may be disadvantaged in comparison to other investors, including with respect to the price the Fund pays or receives when it buys or sells an investment. Further, PIMCO’s and the Fund’s abilities to assess the desirability of proposed consents, waivers or

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amendments with respect to certain investments may be compromised if they are not privy to available Confidential Information. PIMCO may also determine to receive such Confidential Information in certain circumstances under its applicable policies and procedures. If PIMCO intentionally or unintentionally comes into possession of Confidential Information, it may be unable, potentially for a substantial period of time, to purchase or sell investments to which such Confidential Information relates.

Short Sale Risk

The Fund may use short sales for investment and risk management purposes, including when PIMCO anticipates that the market price of securities will decline or will underperform relative to other securities held in the Fund’s portfolio. Short sales are transactions in which the Fund sells a security or other instrument (such as an option, forward, futures or other derivative contract) that it does not own. Short exposure with respect to securities or market segments may also be achieved through the use of derivative instruments, such as futures or swaps on indices or on individual securities. When the Fund engages in a short sale on a security or other instrument, it must, to the extent required by law, borrow the security or other instrument sold short and deliver it to the counterparty. The Fund will ordinarily have to pay a fee or premium to borrow particular securities and be obligated to repay the lender of the security any dividends or interest that accrue on the security during the period of the loan. The amount of any gain from a short sale will be decreased, and the amount of any loss increased, by the amount of the premium, dividends, interest or expenses the Fund pays in connection with the short sale. Short sales expose the Fund to the risk that it will be required to cover its short position at a time when the securities have appreciated in value, thus resulting in a loss to the Fund. The Fund may, to the extent permitted by law, engage in short sales where it does not own or have the right to acquire the security (or basket of securities) sold short at no additional cost. The Fund’s loss on a short sale could theoretically be unlimited in a case in which the Fund is unable, for whatever reason, to close out its short position. The use by the Fund of short sales in combination with long positions in its portfolio in an attempt to improve performance may not be successful and may result in greater losses or lower positive returns than if the Fund held only long positions. It is possible that the Fund’s long positions will decline in value at the same time that the value of the securities underlying its short positions increase, thereby increasing potential losses to the Fund. In addition, the Fund’s short selling strategies may limit its ability to fully benefit from increases in the relevant securities markets. Short selling also involves a form of financial leverage that may exaggerate any losses realized by the Fund. See “Principal Risks of the Fund—Leverage Risk.” Also, there is the risk that the counterparty to a short sale may fail to honor its contractual terms, causing a loss to the Fund. See “Principal Risks of the Fund—Counterparty Risk.” To the extent the Fund seeks to obtain some or all of its short exposure by using derivative instruments instead of engaging directly in short sales on individual securities, it will be subject to many of the foregoing risks, as well as to those described under “Principal Risks of the Fund—Derivatives Risk.” See also “Principal Risks of the Fund—Segregation and Coverage Risk.”

Other Investment Companies Risk

The Fund may invest in securities of other open- or closed-end investment companies, including without limitation ETFs, to the extent that such investments are consistent with the Fund’s investment objectives and policies and permissible under the 1940 Act. As a shareholder in an investment company, the Fund will bear its ratable share of that investment company’s expenses, and would remain subject to payment of the Fund’s investment management fees with respect to the assets so invested. Common Shareholders would therefore be subject to duplicative expenses to the extent the Fund invests in other investment companies. In addition, these other investment companies may utilize leverage, in which case an investment would subject the Fund to additional risks associated with leverage. See “Principal Risks of the Fund—Leverage Risk.”

Private Placements Risk

A private placement involves the sale of securities that have not been registered under the Securities Act, or relevant provisions of applicable non-U.S. law, to certain institutional and qualified individual purchasers, such as the Fund. In addition to the general risks to which all securities are subject, securities received in a private placement generally are subject to strict restrictions on resale, and there may be no liquid secondary market or

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ready purchaser for such securities. See “Principal Risks of the Fund—Liquidity Risk.” Therefore, the Fund may be unable to dispose of such securities when it desires to do so, or at the most favorable time or price. Private placements may also raise valuation risks. See “Principal Risks of the Fund—Valuation Risk.”

Inflation/Deflation Risk

Inflation risk is the risk that the value of assets or income from the Fund’s investments will be worth less in the future as inflation decreases the value of payments at future dates. As inflation increases, the real value of the Fund’s portfolio could decline. Deflation risk is the risk that prices throughout the economy decline over time. Deflation may have an adverse effect on the creditworthiness of issuers and may make issuer default more likely, which may result in a decline in the value of the Fund’s portfolio and Common Shares.

Risk of Regulatory Changes

To the extent that legislation or national or sub-national bank or other regulators in the U.S. or relevant foreign jurisdiction impose additional requirements or restrictions on the ability of certain financial institutions to make loans, particularly in connection with highly leveraged transactions, the availability of investments sought after by the Fund may be reduced. Further, such legislation or regulation could depress the market value of investments held by the Fund. Additionally, legislative, regulatory or tax developments may affect the investment techniques available to PIMCO and the portfolio managers in connection with managing the Fund and may also adversely affect the ability of the Fund to achieve its investment objectives.

On July 21, 2010, the President signed into law major financial services reform legislation in the form of the Dodd-Frank Wall Street Reform and Consumer Protection Act (the “Dodd-Frank Act”). The Dodd-Frank Act, among other things, grants regulatory authorities, such as the Commodity Futures Trading Commission (the “CFTC”) and SEC, broad rulemaking authority to implement various provisions of the Dodd-Frank Act, including comprehensive regulation of the over-the-counter derivatives market. It is unclear how these regulators will exercise these revised and expanded powers and whether they will undertake rulemaking, supervisory or enforcement actions (in addition to those that have been proposed or taken thus far) that would adversely affect the Fund or investments made by the Fund. Possible regulatory actions taken under these revised and expanded powers may include actions related to, among others, financial consumer protection, proprietary trading and derivatives. There can be no assurance that future regulatory actions authorized by the Dodd-Frank Act will not adversely affect the Fund’s performance and/or yield, perhaps to a significant extent. For example, the implementation of the Dodd-Frank Act could adversely affect the Fund by increasing transaction and/or regulatory compliance costs. In addition, greater regulatory scrutiny may increase the Fund’s and the Investment Manager’s or Sub-Adviser’s exposure to potential liabilities or restrictions. Increased regulatory oversight can also impose administrative burdens on the Fund and the Investment Manager or Sub-Adviser including, without limitation, making them subject to examinations or investigations and requiring them to implement new policies and procedures.

Regulatory Risk—Commodity Pool Operator

The Fund has claimed an exclusion from the definition of the term “commodity pool operator” under the CEA pursuant to Rule 4.5 under the CEA promulgated by the CFTC. The Fund currently is not, therefore, subject to registration or regulation as a “commodity pool operator” under the CEA and the Fund intends to be operated so as not to be deemed to be a “commodity pool” under the regulations of the CFTC under current law. On February 9, 2012, the CFTC adopted amendments to its rules that, once effective, may affect the ability of the Fund to continue to claim this exclusion. The Fund would be limited in its ability to use futures or options on futures or engage in swaps transactions if it continued to claim the exclusion. If the Fund did not continue to claim the exclusion, the Fund believes that the Investment Manager and/or Sub-Adviser would likely become subject to registration and regulation as a commodity pool operator with respect to the Fund. The Fund may incur additional expenses as a result of the CFTC’s registration and regulatory requirements. The impact of the rule changes on the operations of the Fund and the Investment Manager and/or Sub-Adviser is not fully known at this time. The Fund and the Investment Manager and/or Sub-Adviser are continuing to analyze the effect of these rule changes on the Fund.

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Liquidity Risk

The Fund may invest without limit in illiquid securities (i.e. , securities that cannot be disposed of within seven days in the ordinary course of business at approximately the value at which the Fund has valued the securities). Many of the Fund’s investments may be illiquid. Illiquid securities may trade at a discount from comparable, more liquid investments, and may be subject to wide fluctuations in market value. Also, the Fund may not be able to dispose readily of illiquid securities when that would be beneficial at a favorable time or price or at prices approximating those at which the Fund then values them. Further, the lack of an established secondary market for illiquid securities may make it more difficult to value such securities, which may negatively affect the price the Fund would receive upon disposition of such securities. See “Principal Risks of the Fund—Valuation Risk.”

Tax Risk

The Fund intends to elect to be treated as a “regulated investment company” under the Code and intends each year to qualify and be eligible to be treated as such. If the Fund qualifies as a regulated investment company, it generally will not be subject to U.S. federal income tax on its net investment income or net short-term or long-term capital gains, distributed (or deemed distributed, as described below) to shareholders, provided that, for each taxable year, the Fund distributes (or is treated as distributing) to its shareholders an amount equal to or exceeding 90% of its “investment company taxable income” as that term is defined in the Code (which includes, among other things, dividends, taxable interest and the excess of any net short-term capital gains over net long-term capital losses, as reduced by certain deductible expenses). The Fund intends to distribute all or substantially all of its investment company taxable income and net capital gain each year. In order for the Fund to qualify as a regulated investment company in any taxable year, the Fund must meet certain asset diversification tests and at least 90% of its gross income for such year must be certain types of qualifying income. Foreign currency gains will generally be treated as qualifying income for purposes of the 90% gross income requirement. However, the U.S. Treasury Department has authority to issue regulations in the future that could treat some or all of the Fund’s foreign currency gains as non-qualifying income, thereby jeopardizing the Fund’s status as a regulated investment company for all years to which the regulations are applicable. Income derived from some commodity-linked derivatives is not qualifying income, and the treatment of income from some other commodity-linked derivatives is uncertain, for purposes of the 90% gross income test. If for any taxable year the Fund were to fail to meet the income or diversification test described above, the Fund could in some cases cure such failure, including by paying a fund-level tax and, in the case of a diversification test failure, disposing of certain assets. If the Fund were ineligible to or otherwise did not cure such failure for any year, or were otherwise to fail to qualify as a regulated investment company accorded special tax treatment in any taxable year, it would be treated as a corporation subject to U.S. federal income tax, thereby subjecting any income earned by the Fund to tax at the corporate level (currently at a 35% U.S. federal tax rate) and, when such income is distributed, to a further tax at the shareholder level to the extent of the Fund’s current or accumulated earnings and profits.

Recent Economic Conditions Risk

The debt and equity capital markets in the United States and in foreign countries have been negatively affected by significant write-offs in the banking and financial services sectors relating to subprime mortgages and the re-pricing of credit risk in the broadly syndicated market, among other things. These events, along with the deterioration of housing markets, the failure of banking and other major financial institutions and resulting governmental actions have led to worsening general economic conditions, which have materially and adversely affected the broader financial and credit markets and have reduced the availability of debt and equity capital for the market as a whole and financial firms in particular. These developments may increase the volatility of the value of securities owned by the Fund, and also may make it more difficult for the Fund to accurately value securities or to sell securities on a timely basis. These developments have adversely affected the broader global economy, and may continue to do so, which in turn may adversely affect the ability of issuers of securities owned by the Fund to make payments of principal and interest when due, lead to lower credit ratings and increase the rate of defaults. Such developments could, in turn, reduce the value of securities owned by the Fund and

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adversely affect the net asset value and/or market value of the Fund’s Common Shares. In addition, the prolonged continuation or further deterioration of current market conditions could adversely affect the Fund’s portfolio.

The above-noted instability in the financial markets discussed above has led the U.S. and certain foreign governments to take a number of unprecedented actions designed to support certain banking and other financial institutions and segments of the financial markets that have experienced extreme volatility, and in some cases a lack of liquidity. Federal, state and other governments and their regulatory agencies or self-regulatory organizations may take actions that affect the regulation of the instruments in which the Fund invests, or the issuers of such instruments, in ways that are unforeseeable or not fully understood or anticipated. See “Principal Risks of the Fund––Risk of Regulatory Changes.”

The implications of government ownership and disposition of these assets are unclear, and such programs may have positive or negative effects on the liquidity, valuation and performance of the Fund’s portfolio holdings and the value of the Common Shares. Governments or their agencies have and may in the future acquire distressed assets from financial institutions and acquire ownership interests in those institutions.

U.S. legislation or regulation may also change the way in which the Fund itself is regulated. Such legislation or regulation could limit or preclude the Fund’s ability to achieve its investment objectives. See “Principal Risks of the Fund––Risk of Regulatory Changes.”

Market Disruption and Geopolitical Risk

The wars with Iraq and Afghanistan and similar conflicts and geopolitical developments, their aftermath and substantial military presence in Afghanistan are likely to have a substantial effect on the U.S. and world economies and securities markets. The nature, scope and duration of the wars and the potential costs of rebuilding infrastructure cannot be predicted with any certainty. Terrorist attacks on the World Trade Center and the Pentagon on September 11, 2001 closed some of the U.S. securities markets for a four-day period and similar future events cannot be ruled out. The war and occupation, terrorism and related geopolitical risks have led, and may in the future lead, to increased short-term market volatility and may have adverse long-term effects on U.S. and world economies and markets generally. Likewise, natural and environmental disasters, such as the earthquake and tsunami in Japan in early 2011, and systemic market dislocations of the kind surrounding the insolvency of Lehman Brothers in 2008, if repeated, could be highly disruptive to economies and markets. Those events as well as other changes in foreign and domestic economic and political conditions also could have an acute effect on individual issuers or related groups of issuers. These risks also could adversely affect individual issuers and securities markets, interest rates, secondary trading, ratings, credit risk, inflation, deflation and other factors relating to the Fund’s investments and the market value and net asset value of the Fund’s Common Shares.

Potential Conflicts of Interest Risk—Allocation of Investment Opportunities

The Investment Manager and the Sub-Adviser are involved worldwide with a broad spectrum of financial services and asset management activities and may engage in the ordinary course of business in activities in which their interests or the interests of their clients may conflict with those of the Fund. The Investment Manager and the Sub-Adviser may provide investment management services to other funds and discretionary managed accounts that follow an investment program similar to that of the Fund. Subject to the requirements of the 1940 Act, the Investment Manager and the Sub-Adviser intend to engage in such activities and may receive compensation from third parties for their services. The results of the Fund’s investment activities may differ from those of the Fund’s affiliates, or another account managed by the Fund’s affiliates, and it is possible that the Fund could sustain losses during periods in which one or more of the Fund’s affiliates or and other accounts achieve profits on their trading for proprietary or other accounts.

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Certain Affiliations

Certain broker-dealers may be considered to be affiliated persons of the Fund, the Investment Manager and/or PIMCO due to their possible affiliations with Allianz SE, the ultimate parent of the Investment Manager and PIMCO. Absent an exemption from the SEC or other regulatory relief, the Fund is generally precluded from effecting certain principal transactions with affiliated brokers, and its ability to purchase securities being underwritten by an affiliated broker or a syndicate including an affiliated broker, or to utilize affiliated brokers for agency transactions, is subject to restrictions. This could limit the Fund’s ability to engage in securities transactions and take advantage of market opportunities. In addition, unless and until the underwriting syndicate is broken in connection with the initial public offering of the Common Shares, the Fund will be precluded from effecting principal transactions with brokers who are members of the syndicate.

Anti-Takeover Provisions

The Fund’s Declaration includes provisions that could limit the ability of other entities or persons to acquire control of the Fund or to convert the Fund to open-end status. See “Anti-Takeover and Other Provisions in the Declaration of Trust.” These provisions in the Declaration could have the effect of depriving the Common Shareholders of opportunities to sell their Common Shares at a premium over the then-current market price of the Common Shares or at net asset value.

HOW THE FUND MANAGES RISK

Hedging and Related Strategies

The Fund may (but is not required to) use various investment strategies to seek exposure to foreign currencies, or attempt to hedge exposure to reduce the risk of loss and preserve capital, due to fluctuations in currency exchange rates relative to the U.S. dollar. See “Portfolio Contents—Foreign Currencies and Related Transactions.” The Fund may also purchase credit default swaps for the purpose of hedging the Fund’s credit exposure to certain issuers and, thereby, seek to decrease its exposure to credit risk, and it may invest in structured notes or interest rate futures contracts or swap, cap, floor or collar transactions for the purpose of reducing the interest rate sensitivity of the Fund’s portfolio and, thereby, seek to decrease the Fund’s exposure to interest rate risk. See “Portfolio Contents—Credit Default Swaps,” “Portfolio Contents—Structured Notes and Related Instruments” and “Portfolio Contents—Certain Interest Rate Transactions” in this prospectus. Other derivatives strategies and instruments that the Fund may use include without limitation: financial futures contracts; short sales; other types of swap agreements or options thereon; options on financial futures; and options based on either an index or individual debt securities whose prices, PIMCO believes, correlate with the prices of the Fund’s investments. Income earned by the Fund from its hedging and related transactions may be subject to one or more special U.S. federal income tax rules that can affect the amount, timing and/or character of distributions to Common Shareholders. For instance, income earned by the Fund from its foreign currency hedging activities, if any, may give rise to ordinary income that, to the extent not offset by losses from such activities, may be distributed to Common Shareholders and taxable at ordinary income rates. Therefore, any foreign currency hedging activities by the Fund can increase the amount of distributions taxable to Common Shareholders as ordinary income. See “Tax Matters.” There is no assurance that these hedging strategies will be available at any time or that PIMCO will determine to use them for the Fund or, if used, that the strategies will be successful. PIMCO may determine not to engage in hedging strategies or to do so only in unusual circumstances or market conditions. In addition, the Fund may be subject to certain restrictions on its use of hedging strategies imposed by guidelines of one or more ratings agencies that may issue ratings on any preferred shares issued by the Fund.

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MANAGEMENT OF THE FUND

Trustees and Officers

The Board of Trustees is responsible for the management of the Fund, including supervision of the duties performed by the Investment Manager and PIMCO. There are currently seven trustees of the Fund, three of whom are treated by the Fund as “interested persons” (as defined in the 1940 Act). Certain of the Trustees are interested persons due to beneficial ownership of common stock of one or more principal underwriters of the Fund in its initial public offering of Common Shares. After the completion of the initial public offering of the Common Shares, it is expected that only one Trustee will be treated as an “interested person” of the Fund. The names and business addresses of the trustees and officers of the Fund and their principal occupations and other affiliations during the past five years are set forth under “Management of the Fund” in the Statement of Additional Information.

Investment Manager

The Investment Manager serves as the investment manager of the Fund. Subject to the supervision of the Board, the Investment Manager is responsible for managing, either directly or through others selected by it, the investment activities of the Fund and the Fund’s business affairs and other administrative matters. The Investment Manager is located at 1633 Broadway, New York, New York 10019.

Organized in 2000, the Investment Manager provides investment management and advisory services to a number of closed-end and open-end investment company clients. The Investment Manager is a wholly-owned indirect subsidiary of Allianz SE, a publicly-traded European insurance and financial services company. As of March 31, 2012, the Investment Manager had approximately $47.3 billion in assets under management.

The Investment Manager has retained its affiliate, PIMCO, as a sub-adviser to manage the Fund’s portfolio investments. See “—Sub-Adviser” below. The Investment Manager may retain affiliates to provide various administrative and other services required by the Fund.

Sub-Adviser

PIMCO, an affiliate of the Investment Manager, serves as the sub-adviser for the Fund pursuant to a portfolio management agreement between the Investment Manager and PIMCO. Subject to this agreement and to the supervision of the Investment Manager, PIMCO has full investment discretion and makes all determinations with respect to the investment of the Fund’s assets.

PIMCO is located at 840 Newport Center Drive, Newport Beach, California 92660. Organized in 1971, PIMCO provides investment management and advisory services to private accounts of institutional and individual clients and to a number of open-end and closed-end investment companies. As of March 31, 2012, PIMCO had approximately $1.77 trillion in assets under management.

The Investment Manager (and not the Fund) pays a portion of the fees it receives under the Investment Management Agreement (as defined below) to PIMCO in return for PIMCO’s services. The Investment Manager will pay a monthly fee to PIMCO at the annual rate of 1.025% of the Fund’s average daily total managed assets.

Bill Gross, a founder of PIMCO, is a Managing Director and Co-Chief Investment Officer of PIMCO. In his role as Co-Chief Investment Officer, he serves as the head of the Investment Committee, which oversees setting investment policy decisions, including duration positioning, yield curve management, sector allocation, credit quality and overall portfolio composition, for all PIMCO portfolios and strategies, including the Fund.

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The following team of investment professionals, led by Daniel J. Ivascyn, has primary responsibility for the day-to-day portfolio management of the Fund:

The Statement of Additional Information provides additional information about the portfolio managers’ compensation, other accounts managed by the portfolio managers and the portfolio managers’ ownership of securities in the Fund.

Investment Management Agreement

Pursuant to an investment management agreement between the Investment Manager and the Fund (the “Investment Management Agreement”), the Fund has agreed to pay the Investment Manager an annual fee, payable monthly, in an amount equal to 1.15% of the Fund’s average daily total managed assets, for its services rendered, for the facilities furnished and for certain expenses borne by the Investment Manager pursuant to the Investment Management Agreement. “Total managed assets” means the total assets of the Fund (including assets attributable to any reverse repurchase agreements, dollar rolls, borrowings and preferred shares that may be outstanding) minus accrued liabilities (other than liabilities representing reverse repurchase agreements, dollar rolls and borrowings). For purposes of calculating “total managed assets,” the liquidation preference of any preferred shares outstanding is not considered a liability. By way of clarification, with respect to any reverse repurchase agreement, dollar roll or similar transaction, “total managed assets” include any proceeds from the sale of an asset of the Fund to a counterparty in such a transaction, in addition to the value of the underlying asset as of the relevant measuring date.

In addition to the fees of the Investment Manager, the Fund pays all other costs and expenses of its operations, including compensation of its trustees (other than those affiliated with the Investment Manager), custodial expenses, shareholder servicing expenses, transfer agency, sub-transfer agency and dividend disbursing expenses, legal fees, expenses of independent auditors, expenses of preparing, printing and distributing prospectuses, shareholder reports, notices, proxy statements and reports to governmental agencies, and taxes, if any.

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Because the fees received by the Investment Manager and PIMCO are based on the total managed assets of the Fund (including assets attributable to any reverse repurchase agreements, dollar rolls, borrowings and preferred shares that may be outstanding), the Investment Manager and PIMCO have a financial incentive for the Fund to utilize reverse repurchase agreements, dollar rolls and borrowings or to issue preferred shares, which may create a conflict of interest between the Investment Manager and PIMCO, on the one hand, and the holders of the Fund’s Common Shares, on the other hand.

A discussion regarding the considerations of the Fund’s Board of Trustees for approving the Investment Management Agreement and the portfolio management agreement between the Investment Manager and PIMCO will be included in the Fund’s first semi-annual report to shareholders.

NET ASSET VALUE

The net asset value per share (“NAV”) of the Fund’s Common Shares is determined by dividing the total value of the Fund’s portfolio investments and other assets, less any liabilities, by the total number of shares outstanding. Fund shares are valued as of a particular time (the “Valuation Time”) on each day (“Business Day”) that the NYSE is open for trading. The Valuation Time is ordinarily at the close of regular trading on the NYSE (normally 4:00 p.m., Eastern time) (the “NYSE Close”). In unusual circumstances, the Board of Trustees may determine that the Valuation Time shall be as of 4:00 p.m., Eastern time, notwithstanding an earlier, unscheduled close or halt of trading on the NYSE.

For purposes of calculating NAV, the Fund’s investments for which market quotations are readily available are valued at market value. Market values for various types of securities and other instruments are determined on the basis of closing prices or last sales prices on an exchange or other market, or based on quotes or other market information obtained from quotation reporting systems, established market makers or pricing services. Short-term investments having a maturity of 60 days or less are generally valued at amortized cost.

If market quotations are not readily available (including in cases where available market quotations are deemed to be unreliable), the Fund’s investments will be valued at fair value as determined in good faith pursuant to policies and procedures approved by the Board of Trustees (so called “fair value pricing”). Fair value pricing may require subjective determinations about the value of a security or other asset, and fair values used to determine the Fund’s NAV may differ from quoted or published prices, or from prices that are used by others, for the same investments. Also, the use of fair value pricing may not always result in adjustments to the prices of securities or other assets held by the Fund.

The Fund may determine that market quotations are not readily available due to events relating to a single issuer ( e.g. , corporate actions or announcements) or events relating to multiple issuers ( e.g. , governmental actions or natural disasters). The Fund may determine the fair value of investments based on information provided by pricing services and other third-party vendors, which may recommend fair value prices or adjustments with reference to other securities, indices or assets. In considering whether fair value pricing is required and in determining fair values, the Fund may, among other things, consider significant events (which may be considered to include changes in the value of U.S. securities or securities indices) that occur after the close of the relevant market and before the Valuation Time. The Fund may use modeling tools provided by third-party vendors to determine fair values of certain non-U.S. securities.

For purposes of calculating NAV, the Fund normally uses pricing data for domestic equity securities received shortly after the NYSE Close and does not normally take into account trading, clearances or settlements that take place after the NYSE Close. Domestic fixed income and non-U.S. securities are normally priced using data reflecting the earlier closing of the principal markets for those securities, subject to possible fair value adjustments. Information that becomes known to the Fund or its agents after NAV has been calculated on a particular day will not generally be used to retroactively adjust the price of a security or NAV determined earlier that day.

Investments initially valued in currencies other than the U.S. dollar are converted to U.S. dollars using exchange rates obtained from pricing services. As a result, NAV of the Fund’s shares may be affected by changes

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in the value of currencies in relation to the U.S. dollar. The value of investments traded in markets outside the United States or denominated in currencies other than the U.S. dollar may be affected significantly on a day that the NYSE is closed. The calculation of the Fund’s NAV may not take place contemporaneously with the determination of the prices of non-U.S. securities used in NAV calculations.

In unusual circumstances, instead of valuing securities in the usual manner, the Fund may value securities at fair value as determined in good faith by the Board of Trustees, generally based upon recommendations provided by the Investment Manager or PIMCO. Fair valuation also may be required due to material events that occur after the close of the relevant market but prior to the NYSE Close.

DISTRIBUTIONS

Commencing with the Fund’s first dividend, the Fund intends to make monthly cash distributions to Common Shareholders at rates that reflect the past and projected net income of the Fund. Subject to applicable law, the Fund expects regularly to fund a portion of its distributions with gains from the sale of portfolio securities and other sources. The dividend rate that the Fund pays on its Common Shares may vary as portfolio and market conditions change, and will depend on a number of factors, including without limitation the amount of the Fund’s undistributed net investment income and net short- and long-term capital gains, as well as the costs of any leverage obtained by the Fund (including interest expenses on any reverse repurchase agreements, dollar rolls and borrowings and dividends payable on any preferred shares issued by the Fund). As portfolio and market conditions change, the rate of distributions on the Common Shares and the Fund’s dividend policy could change. For a discussion of factors that may cause the Fund’s income and capital gains (and therefore the dividend) to vary, see “Principal Risks of the Fund.” The Fund intends to distribute each year all of its net investment income and net short-term capital gains. In addition, at least annually, the Fund intends to distribute net realized long-term capital gains not previously distributed, if any. The net investment income of the Fund consists of all income (other than net short-term and long-term capital gains) less all expenses of the Fund (after it pays accrued dividends on any outstanding preferred shares). Your initial distribution is expected to be declared approximately 45 days, and paid approximately 60 to 90 days, from the completion of this offering, depending on market conditions. To permit the Fund to maintain more stable distributions, the Fund’s distribution rates will be based, in part, on projections as to annual cash available for distribution and, therefore, the distributions paid by the Fund for any particular month may be more or less than the amount of cash available to the Fund for distribution for that monthly period.

The tax treatment and characterization of the Fund’s distributions may vary significantly from time to time because of the varied nature of the Fund’s investments. To the extent required by the 1940 Act and other applicable laws, absent an exemption, a notice will accompany each monthly distribution with respect to the estimated source (as between net income and gains) of the distribution made. (The Fund will report the proportion of its capital gains distributions that constitute long-term and short-term gains annually, generally on Form 1099.) The tax characterization of the Fund’s distributions made in a taxable year cannot finally be determined until at or after the end of the year. As a result, there is a possibility that the Fund may make total distributions during a taxable year in an amount that exceeds the Fund’s net investment income and net realized capital gains for the relevant year (including as reduced by any capital loss carry-forwards). For example, the Fund may distribute amounts early in the year that are derived from short-term capital gains, but incur net short-term capital losses later in the year, thereby offsetting short-term capital gains out of which distributions have already been made by the Fund. In such a situation, the amount by which the Fund’s total distributions exceed net investment income and net realized capital gains would generally be treated as a tax-free return of capital up to the amount of a shareholder’s tax basis in his or her Common Shares, with any amounts exceeding such basis treated as gain from the sale of Common Shares. In general terms, a return of capital would occur where a Fund distribution (or portion thereof) represents a return of a portion of your investment, rather than net income or capital gains generated from your investment during a particular period. Although return of capital distributions may not be taxable, such distributions would reduce the basis of a shareholder’s Common Shares and therefore may increase a shareholder’s tax liability for capital gains upon a sale of Common Shares. See “Tax Matters.”

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The 1940 Act currently limits the number of times the Fund may distribute long-term capital gains in any tax year, which may increase the variability of the Fund’s distributions and result in certain distributions being comprised more or less heavily than others of long-term capital gains eligible for favorable income tax rates.

Unless a Common Shareholder elects to receive distributions in cash, all distributions of Common Shareholders whose shares are registered with the plan agent will be automatically reinvested in additional Common Shares under the Fund’s Dividend Reinvestment Plan. See “Distributions” and “Dividend Reinvestment Plan.”

Although it does not currently intend to do so, the Board of Trustees may change the Fund’s distribution policy and the amount or timing of distributions, based on a number of factors, including the amount of the Fund’s undistributed net investment income and net short- and long-term capital gains and historical and projected net investment income and net short- and long-term capital gains.

DIVIDEND REINVESTMENT PLAN

The Fund has adopted a Dividend Reinvestment Plan (the “Plan”) which allows Common Shareholders to reinvest Fund distributions in additional Common Shares of the Fund. BNY Mellon Investment Servicing (US) Inc. (the “Plan Agent”) serves as agent for Common Shareholders in administering the Plan. It is important to note that participation in the Plan and automatic reinvestment of Fund distributions does not ensure a profit, nor does it protect against losses in a declining market.

Automatic Enrollment / Voluntary Participation

Under the Plan, Common Shareholders whose shares are registered with the Plan Agent (“registered shareholders”) are automatically enrolled as participants in the Plan and will have all Fund distributions of income, capital gains and returns of capital (together, “distributions”) reinvested by the Plan Agent in additional Common Shares of the Fund, unless the shareholder elects to receive cash. Registered shareholders who elect not to participate in the Plan will receive all distributions in cash paid by check and mailed directly to the shareholder of record (or if the shares are held in street or other nominee name, to the nominee) by the Plan Agent.

Participation in the Plan is voluntary. Participants may terminate or resume their enrollment in the Plan at any time without penalty by notifying the Plan Agent online at www.bnymellon.com/shareowner/equityaccess, by calling (800) 254-5197, by writing to the Plan Agent, P.O. Box 358035, Pittsburgh, PA 15252, or, as applicable, by completing and returning the transaction form attached to a Plan statement. A proper notification will be effective immediately and apply to the Fund’s next distribution if received by the Plan Agent at least ten (10) days prior to the record date for the distribution; otherwise, a notification will be effective shortly following the Fund’s next distribution and will apply to the Fund’s next succeeding distribution thereafter. If you withdraw from the Plan and so request, the Plan Agent will arrange for the sale of your shares and send you the proceeds, minus a transaction fee and brokerage commissions.

How Shares are Purchased Under the Plan

For each Fund distribution, the Plan Agent will acquire Common Shares for participants either (i) through receipt of newly issued Common Shares from the Fund (“newly issued shares”) or (ii) by purchasing Common Shares of the Fund on the open market (“open market purchases”). If, on a distribution payment date, the net asset value per Common Share of the Fund (“NAV”) is equal to or less than the market price per Common Share plus estimated brokerage commissions (often referred to as a “market premium”), the Plan Agent will invest the distribution amount on behalf of participants in newly issued shares at a price equal to the greater of (i) NAV or (ii) 95% of the market price per Common Share on the payment date. If the NAV is greater than the market price per Common Share plus estimated brokerage commissions (often referred to as a “market discount”) on a distribution payment date, the Plan agent will instead attempt to invest the distribution amount through open market purchases. If the Plan Agent is unable to invest the full distribution amount in open market purchases, or if the market discount shifts to a market premium during the purchase period, the Plan Agent will invest any un-invested portion of the distribution in newly issued shares at a price equal to the greater of (i) NAV or

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(ii) 95% of the market price per share as of the last business day immediately prior to the purchase date (which, in either case, may be a price greater or lesser than the NAV per Common Share on the distribution payment date). No interest will be paid on distributions awaiting reinvestment.

Under the Plan, the market price of Common Shares on a particular date is the last sales price on the exchange where the shares are listed on that date or, if there is no sale on the exchange on that date, the mean between the closing bid and asked quotations for the shares on the exchange on that date. The NAV per Common Share on a particular date is the amount calculated on that date (normally at the close of regular trading on the NYSE) in accordance with the Fund’s then current policies.

Fees and Expenses

No brokerage charges are imposed on reinvestments in newly issued shares under the Plan. However, all participants will pay a pro rata share of brokerage commissions incurred by the Plan Agent when it makes open market purchases. There are currently no direct service charges imposed on participants in the Plan, although the Fund reserves the right to amend the Plan to include such charges. The Plan Agent imposes a transaction fee (in addition to brokerage commissions that are incurred) if it arranges for the sale of your Common Shares held under the Plan.

Shares Held Through Nominees

If your Common Shares are held through a broker, bank or other nominee (together, a “nominee”) and are not registered with the Plan Agent, neither you nor the nominee will be participants in or have distributions reinvested under the Plan. If you are a beneficial owner of Common Shares and wish to participate in the Plan, and your nominee is unable or unwilling to become a registered shareholder and a Plan participant on your behalf, you may request that your nominee arrange to have all or a portion of your shares re-registered with the Plan Agent in your name so that you may be enrolled as a participant in the Plan. Please contact your nominee for details or for other possible alternatives. Participants whose shares are registered with the Plan Agent in the name of one nominee firm may not be able to transfer the shares to another firm and continue to participate in the Plan.

Tax Consequences

Automatically reinvested dividends and distributions are taxed in the same manner as cash dividends and distributions— i.e. , automatic reinvestment in additional shares does not relieve shareholders of, or defer the need to pay, any income tax that may be payable (or that is required to be withheld) on Fund dividends and distributions.

The Fund and the Plan Agent reserve the right to amend or terminate the Plan. Additional information about the Plan, as well as a copy of the full Plan itself, may be obtained from the Plan Agent, P.O. Box 358035, Pittsburgh, PA 15252; telephone number: (800) 254-5197; web site: www.bnymellon.com/shareowner/equityaccess.

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DESCRIPTION OF SHARES

The following is a brief description of the anticipated capital structure of the Fund. This description does not purport to be complete and is subject to and qualified in its entirety by reference to the Declaration and the Fund’s Bylaws, as amended and restated through the date hereof (the “Bylaws”). The Declaration and Bylaws are each exhibits to the registration statement of which this prospectus is a part.

The Fund is an unincorporated voluntary association with transferable shares of beneficial interest (commonly referred to as a “Massachusetts business trust”) established under the laws of The Commonwealth of Massachusetts by the Declaration. The Declaration provides that the Trustees of the Fund may authorize separate classes of shares of beneficial interest. Preferred shares may be issued in one or more series, with such par value and with such rights as determined by the Board, by action of the Board without the approval of the Common Shareholders.

The Declaration authorizes the issuance of an unlimited number of Common Shares. The Common Shares will be issued with a par value of $0.00001 per share.

Common Shareholders are entitled to share equally in dividends declared by the Board and in the net assets of the Fund available for distribution to Common Shareholders after payment of the preferential amounts payable to any outstanding preferred shares of beneficial interest. All Common Shares have equal rights to the payment of dividends and the distribution of assets upon liquidation. Common Shares will, when issued, be fully paid and, subject to matters discussed in “Anti-Takeover and Other Provisions in the Declaration of Trust,” non-assessable, and will have no pre-emptive or conversion rights or rights to cumulative voting, and have no right to cause the Fund to redeem their shares. Upon liquidation of the Fund, after paying or adequately providing for the payment of all liabilities of the Fund and the liquidation preference with respect to any outstanding preferred shares, and upon receipt of such releases, indemnities and refunding agreements as they deem necessary for their protection, the Trustees may distribute the remaining assets of the Fund among the Fund’s Common Shareholders.

Common Shareholders are entitled to one vote for each Common Share held. Each fractional share shall be entitled to a proportionate fractional vote, except as otherwise provided by the Declaration, Bylaws, or required by applicable law.

The Fund will send unaudited reports at least semiannually and audited financial statements annually to all of its Common Shareholders.

The Fund anticipates that its Common Shares will be listed on the NYSE, subject to notice of issuance, under the trading or “ticker” symbol “PDI.” The Fund intends to hold annual meetings of shareholders so long as the Common Shares are listed on a national securities exchange and annual meetings are required as a condition of such listing.

Net asset value will be reduced immediately following the offering by the amount of the sales load and offering expenses paid or reimbursed by the Fund. The Sub-Adviser has agreed to pay the amount by which the Fund’s offering costs (other than the sales load) exceed $0.05 per Common Share. The Sub-Adviser has agreed to pay all of the Fund’s organizational expenses.

Unlike open-end funds, closed-end funds like the Fund do not continuously offer shares and do not provide daily redemptions. Rather, if a shareholder determines to buy additional Common Shares or sell shares already held, the shareholder may do so by trading on the exchange through a broker or otherwise. The Declaration limits the ability of the Fund to convert to open-end status. See “Anti-Takeover and Other Provisions in the Declaration of Trust.”

Shares of closed-end investment companies frequently trade at prices lower than net asset value. Shares of closed-end investment companies have during some periods traded at prices higher than net asset value and during other periods traded at prices lower than net asset value. The Fund cannot assure you that Common Shares will trade at a price equal to or higher than net asset value in the future. Net asset value will be reduced immediately following the offering by the sales load and the amount of offering expenses paid or reimbursed by the Fund. See “Use of Proceeds.” In addition to net asset value, market price may be affected by factors relating

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to the Fund such as dividend levels and stability (which will in turn be affected by Fund expenses, including the costs of any reverse repurchase agreements, dollar rolls, borrowings or other leverage used by the Fund, levels of dividend and interest payments by the Fund’s portfolio holdings, levels of appreciation/depreciation of the Fund’s portfolio holdings, regulation affecting the timing and character of Fund distributions and other factors), portfolio credit quality, liquidity, call protection, market supply and demand, and similar factors relating to the Fund’s portfolio holdings. The Fund’s market price may also be affected by general market or economic conditions, including market trends affecting securities values generally or values of closed-end fund shares more specifically. The Common Shares are designed primarily for long-term investors, and investors in the Common Shares should not view the Fund as a vehicle for trading purposes. See the Statement of Additional Information under “Repurchase of Common Shares; Conversion to Open-End Fund.”

As noted under “Leverage,” as soon as reasonably practicable following the completion of the initial public offering of the Fund’s Common Shares, the Fund intends, subject to then favorable market conditions, to add leverage to its portfolio by utilizing reverse repurchase agreements, such that the leverage initially obtained represents approximately 29% of the Fund’s total assets (including the amounts of leverage obtained through the use of such instruments). The Fund may also obtain leverage through dollar rolls or borrowings, such as through bank loans or commercial paper or other credit facilities. The Fund may also enter into transactions other than those noted above that may give rise to a form of leverage including, among others, futures and forward contracts (including foreign currency exchange contracts), credit default swaps, total return swaps and other derivative transactions, loans of portfolio securities, short sales and when-issued, delayed delivery and forward commitment transactions.

Although it has no present intention to do so, the Fund may determine in the future to issue preferred shares or other senior securities to add leverage to its portfolio. Any such preferred shares would have complete priority upon distribution of assets over the Common Shares. See “Leverage—Possible Future Issuance of Preferred Shares.”

ANTI-TAKEOVER AND OTHER PROVISIONS IN THE DECLARATION OF TRUST

The Declaration and the Bylaws include provisions that could limit the ability of other entities or persons to acquire control of the Fund or to convert the Fund to open-end status. The Fund’s Trustees are divided into three classes. At each annual meeting of shareholders, the term of one class will expire and each Trustee elected to that class will hold office until the third annual meeting thereafter. The classification of the Board of Trustees in this manner could delay for an additional year the replacement of a majority of the Board of Trustees. In addition, the Declaration provides that a Trustee may be removed only for cause and only (i) by action of at least seventy-five percent (75%) of the outstanding shares of the classes or series of shares entitled to vote for the election of such Trustee, or (ii) by written instrument, signed by at least seventy-five percent (75%) of the remaining Trustees, specifying the date when such removal shall become effective. Cause for these purposes shall require willful misconduct, dishonesty or fraud on the part of the Trustee in the conduct of his office or such Trustee being convicted of a felony.

As described below, the Declaration grants special approval rights with respect to certain matters to members of the Board who qualify as “Continuing Trustees,” which term means a Trustee who either (i) has been a member of the Board for a period of at least thirty-six months (or since the commencement of the Fund’s operations, if less than thirty-six months) or (ii) was nominated to serve as a member of the Board of Trustees by a majority of the Continuing Trustees then members of the Board.

The Declaration requires the affirmative vote or consent of at least seventy-five percent (75%) of the Board of Trustees and holders of at least seventy-five percent (75%) of the Fund’s shares to authorize certain Fund transactions not in the ordinary course of business, including a merger or consolidation or share exchange, issuance or transfer by the Fund of the Fund’s shares having an aggregate fair market value of $1,000,000 or more (except as may be made pursuant to a public offering, the Fund’s dividend reinvestment plan or upon exercise of any stock subscription rights), a sale, lease, exchange, mortgage, pledge, transfer or other disposition of Fund assets, having an aggregated fair market value of $1,000,000 or more, or any shareholder proposal

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regarding specific investment decisions, unless the transaction is authorized by both a majority of the Trustees and seventy-five percent (75%) of the Continuing Trustees (in which case no shareholder authorization would be required by the Declaration, but may be required in certain cases under the 1940 Act). The Declaration also requires the affirmative vote or consent of holders of at least seventy-five percent (75%) of the Fund’s shares entitled to vote on the matter to authorize a conversion of the Fund from a closed-end to an open-end investment company, unless the conversion is authorized by both a majority of the Trustees and seventy-five percent (75%) of the Continuing Trustees (in which case shareholders would have only the minimum voting rights required by the 1940 Act with respect to the conversion). Also, the Declaration provides that the Fund may be terminated at any time by vote or consent of at least seventy-five percent (75%) of the Fund’s shares or, alternatively, by vote or consent of both a majority of the Trustees and seventy-five percent (75%) of the Continuing Trustees. See “Anti-Takeover and Other Provisions in the Declaration of Trust” in the Statement of Additional Information for a more detailed summary of these provisions.

The Trustees may from time to time grant other voting rights to shareholders with respect to these and other matters in the Bylaws, certain of which are required by the 1940 Act.

The overall effect of these provisions is to render more difficult the accomplishment of a merger or the assumption of control of the Fund by a third party. These provisions also provide, however, the advantage of potentially requiring persons seeking control of the Fund to negotiate with its management regarding the price to be paid and facilitating the continuity of the Fund’s investment objectives and policies. The provisions of the Declaration and Bylaws described above could have the effect of depriving the Common Shareholders of opportunities to sell their Common Shares at a premium over the then current market price of the Common Shares by discouraging a third party from seeking to obtain control of the Fund in a tender offer or similar transaction. The Board of Trustees of the Fund has considered the foregoing anti-takeover provisions and concluded that they are in the best interests of the Fund and its shareholders, including Common Shareholders.

The foregoing is intended only as a summary and is qualified in its entirety by reference to the full text of the Declaration and the Bylaws, both of which are on file with the SEC.

Under Massachusetts law, shareholders could, in certain circumstances, be held personally liable for the obligations of the Fund. However, the Declaration contains an express disclaimer of shareholder liability for debts or obligations of the Fund and requires that notice of such limited liability be given in each agreement, obligation or instrument entered into or executed by the Fund or the Trustees. The Declaration further provides for indemnification out of the assets and property of the Fund for all loss and expense of any shareholder held personally liable for the obligations of the Fund. Thus, the risk of a shareholder incurring financial loss on account of shareholder liability is limited to circumstances in which the Fund would be unable to meet its obligations. The Fund believes that the likelihood of such circumstances is remote.

REPURCHASE OF COMMON SHARES; CONVERSION TO OPEN-END FUND

The Fund is a closed-end investment company and as such its shareholders will not have the right to cause the Fund to redeem their shares. Instead, the Common Shares will trade in the open market at a price that will be a function of factors relating to the Fund such as dividend levels and stability (which will in turn be affected by Fund expenses, including the costs of any reverse repurchase agreements, dollar rolls, borrowings and other leverage used by the Fund, levels of dividend and interest payments by the Fund’s portfolio holdings, levels of appreciation/depreciation of the Fund’s portfolio holdings, regulation affecting the timing and character of Fund’s distributions and other factors), portfolio credit quality, liquidity, call protection, market supply and demand and similar factors relating to the Fund’s portfolio holdings. The market price of the Common Shares may also be affected by general market or economic conditions, including market trends affecting securities values generally or values of closed-end fund shares more specifically. Shares of a closed-end investment company may frequently trade at prices lower than net asset value. The Fund’s Board of Trustees regularly monitors the relationship between the market price and net asset value of the Common Shares. If the Common Shares were to trade at a substantial discount to net asset value for an extended period of time, the Board of Trustees may consider the repurchase of its Common Shares on the open market or in private transactions, the

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making of a tender offer for such shares or the conversion of the Fund to an open-end investment company. The Fund cannot assure you that its Board of Trustees will decide to take or propose any of these actions, or that share repurchases or tender offers will actually reduce any market discount. See “Tax Matters” in the Statement of Additional Information for a discussion of the tax implications of a tender offer by the Fund.

If the Fund were to convert to an open-end company, the Common Shares likely would no longer be listed on the NYSE. In contrast to a closed-end investment company, shareholders of an open-end investment company may require the company to redeem their shares at any time (except in certain circumstances as authorized by or under the 1940 Act) at their net asset value, less any redemption charge that is in effect at the time of redemption.

Before deciding whether to take any action to convert the Fund to an open-end investment company, the Board of Trustees would consider all relevant factors, including the extent and duration of the discount, the liquidity of the Fund’s portfolio, the impact of any action that might be taken on the Fund or its shareholders, and market considerations. Based on these considerations, even if the Common Shares should trade at a discount, the Board of Trustees may determine that, in the interest of the Fund and its shareholders, no action should be taken. See the Statement of Additional Information under “Repurchase of Common Shares; Conversion to Open-End Fund” for a further discussion of possible action to reduce or eliminate any such discount to net asset value.

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TAX MATTERS

U.S. Federal Income Tax Matters

The following is a summary discussion of certain U.S. federal income tax consequences that may be relevant to a Common Shareholder that acquires, holds and/or disposes of Common Shares of the Fund, and reflects provisions of the Code, existing Treasury regulations, rulings published by the Internal Revenue Service (“IRS”), and other applicable authority, as of the date of this prospectus. These authorities are subject to change by legislative or administrative action, possibly with retroactive effect. The following discussion is only a summary of some of the important tax considerations generally applicable to investments in the Fund. For more detailed information regarding tax considerations, see the Statement of Additional Information. There may be other and different tax considerations applicable to particular investors, such as insurance companies, financial institutions, broker-dealers, tax-deferred retirement plans and non-U.S. shareholders (as defined below). Residents of Puerto Rico may be subject to special U.S. tax rules. See “Tax Matters” in the Statement of Additional Information for more information. In addition, income earned through an investment in the Fund may be subject to state, local and foreign taxes. Common Shareholders should consult their own tax advisers regarding their particular situation and the possible application of U.S. federal, state, local, foreign or other tax laws.

Taxation of the Fund

The Fund intends to elect to be treated as a regulated investment company (“RIC”) under Subchapter M of the Code and intends each year to qualify and be eligible to be treated as such. In order for the Fund to qualify as a RIC, it must meet an income and asset diversification test each year. To satisfy the income test, the Fund must derive at least 90% of its gross income in each taxable year from dividends, interest, payments with respect to certain securities loans, and gains from the sale or other disposition of stock, securities or foreign currencies, or other income (including, but not limited to, gains from options, futures or forward contracts) derived with respect to its business of investing in such stock, securities or currencies and net income derived from interests in “qualified publicly traded partnerships” (as defined in the Code). To satisfy the asset diversification test, the Fund must diversify its holdings so that at the end of each quarter of the Fund’s taxable year, (a) at least 50% of the value of its total assets consists of cash and cash items (including receivables), U.S. Government securities, securities of other RICs, and other securities limited, with respect to any one issuer, to no more than 5% of the value of the Fund’s total assets and 10% of the outstanding voting securities of such issuer, and (b) not more than 25% of the value of the Fund’s total assets is invested in the securities (other than those of the U.S. Government or other RICs) of any one issuer or of two or more issuers which the Fund controls and which are engaged in the same, similar or related trades or businesses, or in the securities of one or more “qualified publicly traded partnerships” (as defined in the Code). If the Fund qualifies as a RIC and satisfies certain distribution requirements, the Fund (but not its shareholders) will not be subject to U.S. federal income tax to the extent it distributes its investment company taxable income (as that term is defined in the Code, without regard to the deduction for dividends paid), its net tax-exempt income and its net capital gains (the excess of net long-term capital gains over net short-term capital loss) in a timely manner to its shareholders in the form of dividends or capital gain distributions. The Fund intends to distribute substantially all of such income and gains each year.

If the Fund does retain any investment company taxable income, it will be subject to tax at regular corporate rates on the amount retained. If the Fund retains any net capital gain, it also will be subject to tax at regular corporate rates on the amount retained. If the Fund retains any net capital gain and pays tax on such amount, it may designate the retained amount as undistributed capital gain in a notice to its shareholders who would then (i) be required to include in income for U.S. federal income tax purposes, as long-term capital gain, their shares of such undistributed amount, and (ii) be entitled to credit their proportionate shares of the tax paid by the Fund on such undistributed amount against their U.S. federal income tax liabilities, if any, and to claim such refunds on a properly filed U.S. tax return to the extent the credit exceeds such liabilities. If the Fund makes this designation, for U.S. federal income tax purposes, the tax basis of Common Shares owned by a shareholder will be increased by an amount equal under current law to the difference between the amount of undistributed capital gains included in the shareholder’s gross income under clause (i) of the preceding sentence and the tax deemed paid by the shareholder

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under clause (ii) of the preceding sentence. The Fund is not required to, and there can be no assurance that the Fund will, make this designation if it retains all or a portion of its net capital gain in a taxable year.

A nondeductible excise tax at the rate of 4% will be imposed on the excess, if any, of the Fund’s “required distribution” over its actual distributions in any calendar year. Generally, the required distribution is 98% of the Fund’s ordinary income for the calendar year plus 98.2% of its capital gain net income recognized during the one-year period ending on October 31 (or later if the Fund is permitted to elect and so elects), plus undistributed amounts from prior years. For purposes of the required excise tax distribution, a RIC’s ordinary gains and losses from the sale, exchange, or other taxable disposition of property that would otherwise be taken into account after October 31 (or later if the Fund makes the election referred to immediately above) are generally treated as arising on January 1 of the following calendar year. Also, for purposes of the excise tax, the Fund will be treated as having distributed any amount for which it is subject to corporate income tax for the taxable year ending within the calendar year. The Fund intends to make distributions sufficient to avoid imposition of the excise tax, although there can be no assurance that it will be able to do so. The Fund may determine to pay the excise tax in a year to the extent it is deemed to be in the best interest of the Fund ( e.g. , if the excise tax is de minimis).

The Fund’s intention to qualify for treatment as a RIC may negatively affect the Fund’s return to Common Shareholders by limiting its ability to acquire or continue to hold positions that would otherwise be consistent with its investment strategy or by requiring it to engage in transactions it would otherwise not engage in, resulting in additional transaction costs. In certain circumstances, it may be difficult for the Fund to meet the income or diversification test for RIC qualification. Failure to qualify as a RIC would likely materially reduce the investment return to the Common Shareholders. If the Fund were to fail to meet the income, diversification, or distribution test, the Fund could in some cases cure such failure, including by paying a fund-level tax, paying interest, making additional distributions, or disposing of certain assets. If the Fund were ineligible to or otherwise did not cure such failure for any taxable year, or if the Fund were otherwise to fail to qualify as a RIC accorded special tax treatment for such year, the Fund would be subject to tax on its taxable income at corporate rates, and all distributions from earnings and profits, including any distributions of net tax-exempt income and net long-term capital gains, would be taxable to Common Shareholders as dividend income. In addition, the Fund could be required to recognize unrealized gains, pay substantial taxes and interest and make substantial distributions before re-qualifying as a RIC that is accorded special tax treatment.

Distributions

The Fund intends to make monthly distributions of net investment income. Unless a Common Shareholder elects to receive distributions in cash, all distributions of Common Shareholders whose shares are registered with the Plan Agent will be automatically reinvested in additional Common Shares of the Fund pursuant to the Plan. For U.S. federal income tax purposes, all dividends are generally taxable in the same manner, whether a shareholder takes them in cash or they are reinvested pursuant to the Plan in additional Common Shares of the Fund. A shareholder whose distributions are reinvested in Common Shares under the Plan will be treated as having received a dividend equal to either (i) if newly issued Common Shares are issued under the Plan, generally the fair market value of the newly issued Common Shares issued to the shareholder or (ii) if reinvestment is made through open-market purchases under the Plan, the amount of cash allocated to the shareholder for the purchase of Common Shares on its behalf in the open market. See “Dividend Reinvestment Plan” above.

For U.S. federal income tax purposes, distributions of net investment income are generally taxable as ordinary income. Taxes on distributions of capital gains are determined by how long the Fund owned the investments that generated them, rather than how long a shareholder has owned his or her Common Shares. In general, the Fund will recognize long-term capital gain or loss on investments it has owned (or is deemed to have owned) for more than one year, and short-term capital gain or loss on investments it has owned (or is deemed to have owned) for one year or less. Distributions of net capital gain (that is, the excess of net long-term capital gain over net short-term capital loss, determined in each case with reference to any loss carryforwards) that are properly reported by the Fund as capital gain dividends (“Capital Gain Dividends”) will be taxable to shareholders as long-term capital gains. The Fund is permitted to carry forward net capital losses to one or more

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subsequent taxable years without expiration. Any such carryforward losses will retain their character as short-term or long-term. Capital loss carryforwards are reduced to the extent they offset current-year net realized capital gains, whether the Fund retains or distributes such gains. Long-term capital gain rates applicable to individuals have been temporarily reduced for taxable years beginning before January 1, 2013. These reduced rates will expire for taxable years beginning on or after January 1, 2013, unless Congress enacts legislation providing otherwise. Distributions of net short-term capital gain (as reduced by any net long-term capital loss for the taxable year) will be taxable to shareholders as ordinary income. For taxable years beginning before January 1, 2013, the Fund may report certain dividends as derived from “qualified dividend income,” which, when received by a non-corporate shareholder, will be taxed at the rates applicable to long-term capital gain, provided holding period and other requirements are met at both the shareholder and Fund levels. This provision will expire for taxable years beginning on or after January 1, 2013, unless Congress enacts legislation providing otherwise. The Fund does not expect a significant portion of distributions to be derived from qualified dividend income.

In general, dividends of net investment income received by corporate shareholders of the Fund will qualify for the 70% dividends-received deduction generally available to corporations to the extent of the amount of eligible dividends received by the Fund from domestic corporations for the taxable year. The Fund does not expect a significant portion of its distributions to be eligible for the corporate dividends-received deduction.

If the Fund makes a distribution in excess of its current and accumulated “earnings and profits” in any taxable year, the excess distribution will be treated as a return of capital to the extent of a shareholder’s tax basis in his or her Common Shares, and thereafter as capital gain. A return of capital is not taxable, but it reduces a shareholder’s basis in his or her shares, thus reducing any loss or increasing any gain on a subsequent taxable disposition by the shareholder of such shares.

The determination of the character for U.S. federal income tax purposes of any distribution from the Fund ( i.e. , ordinary income dividends, Capital Gain Dividends, qualified dividends, or return of capital distributions) will be made as of the end of the Fund’s taxable year. Generally, the Fund will provide shareholders with a written statement reporting the amount of any capital gain distributions or other distributions.

Dividends and distributions on the Common Shares are generally subject to federal income tax as described herein to the extent they do not exceed the Fund’s realized income and gains, even though such dividends and distributions may economically represent a return of a particular shareholder’s investment. Such distributions are likely to occur in respect of Common Shares purchased at a time when the Fund’s net asset value reflects unrealized gains or income or gains that are realized but not yet distributed. Such realized income and gains may be required to be distributed even when the Fund’s net asset value also reflects unrealized losses.

A distribution by the Fund will be treated as paid on December 31 of any calendar year if it is declared by the Fund in October, November or December with a record date in such a month and paid by the Fund during January of the following calendar year. Such distributions will be taxable to shareholders in the calendar year in which the distributions are declared, rather than the calendar year in which the distributions are received.

Sale or Exchange of Common Shares

Common Shareholders who sell or exchange their Common Shares will generally recognize gain or loss in an amount equal to the difference between the amount received and the Common Shareholder’s adjusted tax basis in the Common Shares sold or exchanged. If the Common Shares are held as a capital asset, any gain or loss realized upon a taxable disposition of the Common Shares will be treated as long-term capital gain or loss if the shares have been held for more than 12 months. Otherwise, the gain or loss on the taxable disposition of Common Shares will be treated as short-term capital gain or loss. However, any loss realized upon a taxable disposition of Common Shares held by a shareholder for six months or less will be treated as long-term, rather than short-term, to the extent of Capital Gain Dividends received (or deemed received) by the shareholder with respect to the shares. For purposes of determining whether Common Shares have been held for six months or less, the holding period is suspended for any periods during which the Common Shareholder’s risk of loss is diminished as a result of holding one or more other positions in substantially similar or related property, or

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through certain options or short sales. Any loss realized on a sale or exchange of Common Shares will be disallowed to the extent those Common Shares are replaced by other substantially identical shares within a period of 61 days beginning 30 days before and ending 30 days after the date of disposition of the Common Shares (including through the reinvestment of distributions, which could occur, for example, if the Common Shareholder is a participant in the Plan). In that event, the basis of the replacement shares will be adjusted to reflect the disallowed loss.

Medicare Tax

Effective for taxable years beginning on or after January 1, 2013, the “net investment income” of individuals, estates and trusts will be subject to a new 3.8% Medicare contribution tax, to the extent such income exceeds certain threshold amounts. Net investment income generally includes for this purpose dividends, including any Capital Gain Dividends paid by the Fund, and net capital gains recognized on the sale or exchange of shares of the Fund.

Foreign Taxes

The Fund may be liable to foreign governments for taxes relating primarily to investment income or capital gains on foreign securities in the Fund’s portfolio. If at the close of its taxable year, more than 50% of the value of the Fund’s total assets consists of securities of foreign corporations (including foreign governments), the Fund will be permitted to make an election under the Code that would allow Common Shareholders who are U.S. citizens or U.S. corporations to claim a foreign tax credit or deduction (but not both) on their income tax returns for their pro rata portion of qualified taxes paid by the Fund to foreign countries in respect of foreign securities that the Fund held for at least the minimum period specified in the Code. In such a case, Common Shareholders will include in gross income from foreign sources their pro rata shares of such taxes paid by the Fund. A Common Shareholder’s ability to claim an offsetting foreign tax credit or deduction in respect of foreign taxes paid by the Fund is subject to certain limitations imposed by the Code, which may result in the shareholder’s not receiving a full credit or deduction (if any) for the amount of such taxes. Shareholders who do not itemize deductions on their U.S. federal income tax returns may claim a credit (but not a deduction) for such foreign taxes.

Certain Fund Investments

Any transaction by the Fund in foreign currencies, foreign-currency denominated debt obligations or certain foreign currency options, futures contracts, or forward contracts (or similar instruments) may give rise to ordinary income or loss to the extent such income or loss results from fluctuations in the value of the foreign currency concerned. Such ordinary income treatment may accelerate Fund distributions to Common Shareholders and increase the distributions taxed to Common Shareholders as ordinary income. Because a RIC is permitted only to carry forward net capital losses, any net losses so created cannot be carried forward by the Fund to offset income or gains earned in subsequent taxable years.

The Fund’s transactions in derivative instruments ( e.g. , options, futures, forward contracts, structured notes and swap agreements), as well as any of its other hedging, short sale, securities loan or similar transactions, may be subject to uncertainty with respect to their tax treatment, and to one or more special tax rules ( e.g. , notional principal contract, straddle, constructive sale, wash sale, and short sale rules). The aforementioned rules may affect whether gains and losses recognized by the Fund are treated as ordinary or capital or as short-term or long-term, accelerate the recognition of income or gains to the Fund, defer losses to the Fund, and cause adjustments in the holding periods of the Fund’s securities. These rules could therefore affect the amount, timing and/or character of distributions to Common Shareholders. Because the tax treatment and the tax rules applicable to these types of transactions are in some cases uncertain under current law, an adverse determination or future guidance by the IRS with respect to these rules or treatment (which determination or guidance could be retroactive) may affect whether the Fund has made sufficient distributions, and otherwise satisfied the relevant requirements, to maintain its qualification as a RIC and avoid a Fund-level tax.

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Income from certain commodity-linked instruments does not constitute qualifying income for purposes of the 90% gross income test described above. The tax treatment of commodity-linked notes and certain other commodity-linked instruments in which the Fund might invest is not certain, in particular with respect to whether income and gains from such instruments constitute qualifying income. If the Fund treats income from a particular instrument as qualifying income and the income is later determined not to constitute qualifying income, and, together with any other nonqualifying income, causes the Fund’s nonqualifying income to exceed 10% of its gross income in any taxable year, the Fund will fail to qualify as a regulated investment company unless it is eligible to and does pay a tax at the Fund level.

It is possible that the Fund’s use of derivatives and foreign currency-denominated instruments, and any of the Fund’s transactions in foreign currencies and hedging activities, will produce a difference between its book income and the sum of its taxable income and net tax-exempt income (if any). If such a difference arises, and the Fund’s book income is less than the sum of its taxable income and its net tax-exempt income, the Fund could be required to make distributions exceeding book income to qualify as a RIC that is accorded special tax treatment and to eliminate Fund-level tax. In the alternative, if the Fund’s book income exceeds the sum of its taxable income (including realized capital gains) and its net tax-exempt income, the distribution (if any) of such excess generally will be treated as (i) a dividend to the extent of the Fund’s remaining earnings and profits, (ii) thereafter, as a return of capital to the extent of the recipient’s basis in its Common Shares, and (iii) thereafter as gain from the sale or exchange of a capital asset.

From time to time, a substantial portion of the Fund’s investments in loans and other debt obligations could be treated as having “market discount” and/or “original issue discount” (“OID”) for U.S. federal income tax purposes, which, in some cases, could be significant and could cause the Fund to recognize income in respect of these investments before or without receiving cash representing such income. If so, the Fund could be required to pay out as an income distribution each year an amount which is greater than the total amount of cash interest the Fund actually received. As a result, the Fund could be required at times to liquidate investments (including at potentially disadvantageous times or prices) in order to satisfy its distribution requirements or to avoid incurring Fund-level U.S. federal income or excise taxes. If the Fund liquidates portfolio securities to raise cash, the Fund may realize gain or loss on such liquidations; in the event the Fund realizes net long-term or short-term capital gains from such liquidation transactions, its shareholders may receive larger capital gain or ordinary dividends, respectively, than they would in the absence of such transactions.

The interest paid on municipal bonds is generally exempt from U.S. federal income tax. However, because the Fund does not expect to be eligible to pay “exempt-interest dividends” to its shareholders under the Code, any distribution received by Common Shareholders that is attributable to the interest received by the Fund on its municipal bond holdings is taxable to Common Shareholders. In addition, any gains realized by the Fund on the sale or exchange of municipal bonds generally are taxable to Common Shareholders when distributed to them by the Fund.

Investments in debt obligations that are at risk of or in default present special tax issues for the Fund. Tax rules are not entirely clear about issues such as whether or to what extent the Fund should recognize market discount on a debt obligation; when the Fund may cease to accrue interest, OID or market discount; when and to what extent the Fund may take deductions for bad debts or worthless securities; and how the Fund should allocate payments received on obligations in default between principal and income. These and other related issues will be addressed by the Fund when, as, and if it invests in such securities in order to seek to ensure that it distributes sufficient income to preserve its status as a RIC and avoid becoming subject to U.S. federal income or excise tax.

Any investment by the Fund in equity securities of REITs may result in the Fund’s receipt of cash in excess of the REIT’s earnings; if the Fund distributes these amounts, these distributions could constitute a return of capital to Fund shareholders for U.S. federal income tax purposes. Investments in REIT equity securities also may require the Fund to accrue and distribute income not yet received. To generate sufficient cash to make the requisite distributions, the Fund may be required to sell securities in its portfolio (including when it is not advantageous to do so) that it otherwise would have continued to hold. Dividends received by the Fund from a REIT will not qualify for the corporate dividends-received deduction and generally will not constitute qualified dividend income.

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The Fund may invest directly or indirectly in residual interests in REMICs (including by investing in residual interests in CMOs with respect to which an election to be treated as a REMIC is in effect) or equity interests in taxable mortgage pools (“TMPs”). Under a notice issued by the IRS in October 2006 and Treasury regulations that have yet to be issued but may apply retroactively, a portion of the Fund’s income (including income allocated to the Fund from a REIT or other pass-through entity) that is attributable to a residual interest in a REMIC or an equity interest in a TMP (referred to in the Code as an “excess inclusion”) will generally be subject to U.S. federal income tax. This notice also provides, and the regulations are expected to provide, that excess inclusion income of a RIC will be allocated to shareholders of the RIC in proportion to the dividends received by such shareholders, with the same consequences as if the shareholders held the related interest directly. As a result, the Fund may not be a suitable investment for certain tax-exempt investors, as noted below.

In general, excess inclusion income allocated to Common Shareholders (i) cannot be offset by net operating losses (subject to a limited exception for certain thrift institutions), (ii) will constitute unrelated business taxable income (“UBTI”) to entities (including a qualified pension plan, an individual retirement account, a 401(k) plan, a Keogh plan or other tax-exempt entity) subject to tax on UBTI, thereby potentially requiring such an entity that is allocated excess inclusion income, and otherwise might not be required to file a tax return, to file a tax return and pay tax on such income; and (iii) in the case of a foreign shareholder, will not qualify for any reduction in U.S. federal withholding tax. Charitable remainder trusts and other tax-exempt shareholders are urged to consult their tax advisers concerning the consequences of investing in the Fund.

Backup Withholding

Backup withholding is generally required with respect to taxable distributions or the gross proceeds of a sale of Common Shares paid to any non-corporate shareholder who fails to properly furnish a correct taxpayer identification number, who has under-reported dividend or interest income, or who fails to certify that he or she is not subject to such withholding. The backup withholding rate is 28% for amounts paid through 2012. This rate will expire and the backup withholding rate will be 31% for amounts paid after December 31, 2012, unless Congress enacts legislation providing otherwise. Amounts withheld as a result of backup withholding are remitted to the U.S. Treasury but do not constitute an additional tax imposed on the shareholder; such amounts may be claimed as a credit on the shareholder’s U.S. federal income tax return, provided the appropriate information is furnished to the IRS.

Non-U.S. Shareholders

Absent a specific statutory exemption, dividends other than Capital Gain Dividends paid to a shareholder that is not a “United States person” within the meaning of the Code (a “non-U.S. shareholder”) are subject to withholding of U.S. federal income tax at a rate of 30% (or lower applicable treaty rate). Capital Gain Dividends paid to foreign shareholders are generally not subject to withholding. Effective for taxable years of a RIC beginning before January 1, 2012, the RIC was not required to withhold any amounts with respect to distributions of (i) U.S.-source interest income that would not have been subject to U.S. federal income tax if earned directly by an individual foreign shareholder, and (ii) net short-term capital gains in excess of net long-term capital losses, in each case to the extent the RIC properly reported such distributions in a written notice to shareholders. It is currently unclear whether Congress will extend these exemptions from withholding for taxable years beginning on or after January 1, 2012, or what the terms of any such an extension would be, including whether such extension would have retroactive effect.

The Hiring Incentives to Restore Employment Act, enacted in March 2010, generally imposes a reporting and 30% withholding tax regime with respect to certain U.S.-source income, including dividends and interest, and gross proceeds from the sale or other disposal of property that can produce U.S.-source interest or dividends. Very generally, subject to future guidance, it is possible that, beginning in 2014 or 2015, depending on the type of payment, distributions to a Common Shareholder by the Fund will be subject to the 30% withholding requirement, unless the Common Shareholder provides certain information, certifications, or other documentation, as the Fund requires, to comply with the new rules. For more information, see the Statement of Additional Information.

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Shares Purchased Through Tax-Qualified Plans

Special tax rules apply to investments though defined contribution plans and other tax-qualified plans. Common Shareholders should consult their tax advisors to determine the suitability of Common Shares as an investment through such plans and the precise effect of an investment on their particular tax situation.

General

The foregoing discussion relates solely to U.S. federal income tax laws. Dividends and distributions also may be subject to state and local taxes. Common Shareholders are urged to consult their tax advisors regarding specific questions as to federal, state, local, and, where applicable, foreign taxes. Foreign investors should consult their tax advisors concerning the tax consequences of ownership of Common Shares.

The foregoing is a general and abbreviated summary of the applicable provisions of the Code and related regulations currently in effect. For the complete provisions, reference should be made to the pertinent Code sections and regulations. The Code and regulations are subject to change by legislative or administrative actions.

Please see “Tax matters” in the Statement of Additional Information for additional information regarding the tax aspects of investing in Common Shares of the Fund.

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UNDERWRITERS

Under the terms and subject to the conditions contained in the underwriting agreement dated the date of this prospectus, the underwriters named below, for which Morgan Stanley & Co. LLC, Citigroup Global Markets Inc., Merrill Lynch, Pierce, Fenner & Smith Incorporated, UBS Securities LLC and Wells Fargo Securities, LLC are acting as representatives, have severally agreed to purchase, and the Fund has agreed to sell to them, the number of Common Shares indicated below.

The underwriters are offering the Common Shares subject to their acceptance of the Common Shares from the Fund and subject to prior sale. The underwriting agreement provides that the obligations of the several underwriters to pay for and accept delivery of the Common Shares offered by this prospectus are subject to the approval of legal matters by their counsel and to certain other conditions. The underwriters are obligated to take and pay for all of the Common Shares offered by this prospectus if any such Common Shares are taken. However, the underwriters are not required to take or pay for the Common Shares covered by the underwriters’ over-allotment option described below.

The underwriters initially propose to offer part of the Common Shares directly to the public at the initial offering price listed on the cover page of this prospectus and part to certain dealers at a price that represents a concession not in excess of $0.75 per Common Share under the initial offering price. The underwriting discounts and commissions (sales load) of $1.125 per Common Share are equal to 4.50% of the initial offering price. Investors must pay for any Common Shares purchased on or before             , 2012.

The Fund has granted to the underwriters an option, exercisable for 45 days from the date of this prospectus, to purchase up to an aggregate of Common Shares at the initial offering price per Common Share listed on the cover page of this prospectus, less underwriting discounts and commissions. The underwriters may exercise this option solely for the purpose of covering over-allotments, if any, made in connection with the offering of the Common Shares offered by this prospectus. To the extent the option is exercised, each underwriter will become obligated, subject to limited conditions, to purchase approximately the same percentage of the additional Common Shares as the number listed next to the underwriter’s name in the preceding table bears to the total number of Common Shares listed next to the names of all underwriters in the preceding table. If the underwriters’ over-allotment option is exercised in full, the total public offering price would be $            , the total sales load would be $            , the estimated offering expenses would be $             and the total proceeds, after expenses, to the Fund would be $            .

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The following table summarizes the estimated expenses (assuming the Fund issues approximately              Common Shares) and compensation that the Fund will pay:

The fees described below under “Additional Compensation to be Paid by the Sub-Adviser” are not reimbursable to the Sub-Adviser by the Fund, and are therefore not reflected in expenses payable by the Fund in the table above.

Offering expenses paid by the Fund (other than sales load) will not exceed $0.05 per Common Share sold by the Fund in this offering. If the offering expenses referred to in the preceding sentence exceed this amount, the Sub-Adviser will pay the excess. The aggregate offering expenses (excluding the sales load) are estimated to be $             in total, $             of which will be borne by the Fund (or $             if the underwriters exercise their over-allotment option in full). See “Summary of Fund Expenses.”

The underwriters have informed the Fund that they do not intend for sales to discretionary accounts to exceed five percent of the total number of Common Shares offered by them.

In order to meet requirements of the NYSE, the underwriters have undertaken to sell lots of 100 or more shares to a minimum of 400 beneficial owners. The minimum investment requirement is 100 Common Shares ($2,500).

The Fund anticipates that its Common Shares will be approved for listing on the NYSE, under the ticker symbol “PDI,” subject to notice of issuance.

At the Fund’s request, the underwriters have agreed to reserve less than     % of the Common Shares for sale in this offering to certain portfolio managers and other officers and employees of the Sub-Adviser and its affiliates and their relatives (the “affiliated purchasers”), at the offering price of $25.00 per Common Share.

The Fund has agreed, and, subject to certain exceptions, certain affiliated purchasers purchasing Common Shares in this offering have agreed, that, without the prior written consent of the representatives on behalf of the underwriters, it will not, during the period ending 180 days after the date of this prospectus, (1) offer, pledge, sell, contract to sell, sell any option or contract to purchase, purchase any option or contract to sell, grant any option, right or warrant to purchase, lend, or otherwise transfer or dispose of, directly or indirectly, any Common Shares or any securities convertible into or exercisable or exchangeable for Common Shares or (2) enter into any swap or other arrangement that transfers to another, in whole or in part, any of the economic consequences of ownership of the Common Shares, whether any such transaction described in clause (1) or (2) above is to be settled by delivery of Common Shares or such other securities, in cash or otherwise or (3) file any registration statement with the Commission relating to the offering of any Common Shares or any securities convertible into or exercisable or exchangeable for Common Shares. In the event that either (x) during the last 17 days of the 180-day period referred to above, the Fund issues an earnings release or material news or a material event relating to the Fund occurs or (y) prior to the expiration of such 180-day period, the Fund announces that it will release earnings results during the 16-day period beginning on the last day of such 180-day period, the restrictions described above shall continue to apply until the expiration of the 18-day period beginning on the date of the earnings release or the occurrence of the material news or material event, as applicable. This lock-up agreement will not apply to the Common Shares to be sold pursuant to the underwriting agreement or any Common Shares issued pursuant to the Plan.

In order to facilitate the offering of the Common Shares, the underwriters may engage in transactions that stabilize, maintain or otherwise affect the price of the Common Shares. The underwriters currently expect to sell more Common Shares than they are obligated to purchase under the underwriting agreement, creating a short

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position in the Common Shares for their own account. A short sale is covered if the short position is no greater than the number of Common Shares available for purchase by the underwriters under the over-allotment option (exercisable for 45 days from the date of this prospectus). The underwriters can close out a covered short sale by exercising the over-allotment option or purchasing Common Shares in the open market. In determining the source of Common Shares to close out a covered short sale, the underwriters will consider, among other things, the open market price of the Common Shares compared to the price available under the over-allotment option. The underwriters may also sell Common Shares in excess of the over-allotment option, creating a naked short position. The underwriters must close out any naked short position by purchasing Common Shares in the open market. A naked short position is more likely to be created if the underwriters are concerned that there may be downward pressure on the price of the Common Shares in the open market after pricing that could adversely affect investors who purchase in the offering. As an additional means of facilitating the offering, the underwriters may bid for, and purchase, Common Shares in the open market to stabilize the price of the Common Shares. Finally, the underwriters may also impose a penalty bid, whereby selling concessions allowed to syndicate members or other broker-dealers in respect of the Common Shares sold in this offering for their account may be reclaimed by the syndicate if such Common Shares are repurchased by the syndicate in stabilizing or covering transactions. Any of these activities may raise or maintain the market price of the Common Shares above independent market levels or prevent, limit or slow a decline in the market price of the Common Shares. The underwriters are not required to engage in these activities, and may end any of these activities at any time.

Prior to this offering, there has been no public or private market for the Common Shares or any other securities of the Fund. Consequently, the offering price for the Common Shares was determined by negotiation among the Fund, the Investment Manager and the representatives of the underwriters. There can be no assurance, however, that the price at which the Common Shares trade after this offering will not be lower than the price at which they are sold by the underwriters or that an active trading market in the Common Shares will develop and continue after this offering.

The Fund anticipates that certain of the underwriters may, from time to time, act as brokers and dealers in connection with the execution of its portfolio transactions after they have ceased to be underwriters and, subject to certain restrictions, may act as such brokers while they are underwriters.

In connection with this offering, certain of the underwriters or selected dealers may distribute prospectuses electronically. The Fund, Investment Manager and the underwriters have agreed to indemnify each other against certain liabilities, including liabilities under the Securities Act.

The underwriters and their respective affiliates are full service financial institutions engaged in various activities, which may include securities trading, commercial and investment banking, financial advisory, investment management, principal investment, hedging, financing and brokerage activities. Certain of the underwriters or their respective affiliates from time to time have provided in the past, and may provide in the future, investment banking, securities trading, hedging, brokerage activities, commercial lending and financial advisory services to the Fund, certain of its executive officers and affiliates and the Investment Manager, the Sub-Adviser and their affiliates in the ordinary course of business, for which they have received, and may receive, customary fees and expenses.

No action has been taken in any jurisdiction (except in the United States) that would permit a public offering of the Common Shares, or the possession, circulation or distribution of this prospectus or any other material relating to the Fund or the Common Shares in any jurisdiction where action for that purpose is required. Accordingly, the Common Shares may not be offered or sold, directly or indirectly, and neither this prospectus nor any other offering material or advertisements in connection with the Common Shares may be distributed or published, in or from any country or jurisdiction except in compliance with the applicable rules and regulations of any such country or jurisdiction.

Prior to the public offering of Common Shares, Allianz Asset Management of America L.P., an affiliate of the Investment Manager, purchased Common Shares from the Fund in an amount satisfying the net worth requirements of Section 14(a) of the 1940 Act. As of the date of this prospectus, Allianz Asset Management of America L.P. owned 100% of the outstanding Common Shares. Allianz Asset Management of America L.P. may

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be deemed to control the Fund until such time as it owns less than 25% of the outstanding Common Shares, which is expected to occur as of the completion of the offering of Common Shares.

The principal business address of Morgan Stanley & Co. LLC is 1585 Broadway, New York, New York 10036. The principal business address of Citigroup Global Markets Inc. is 388 Greenwich Street, New York, New York 10013. The principal business address of Merrill Lynch, Pierce, Fenner & Smith Incorporated is One Bryant Park, New York, New York 10036. The principal business address of UBS Securities LLC is 299 Park Avenue, New York, New York 10171. The principal business address of Wells Fargo Securities, LLC is 375 Park Avenue, New York, New York 10152.

Additional Compensation to be Paid by the Sub-Adviser

The Sub-Adviser (and not the Fund) has agreed to pay Morgan Stanley & Co. LLC from its own assets, upfront structuring and syndication fees in the amount of $             for advice relating to the structure, design and organization of the Fund, including without limitation, views from an investor, market, distribution and syndication perspective on (i) marketing issues with respect to the Fund’s investment polices and proposed investments, (ii) the overall marketing and positioning thesis for the offering of the Fund’s Common Shares, (iii) securing participants in the Fund’s initial public offering, (iv) preparation of the marketing and diligence materials for the underwriters, (v) conveying information and market updates to the underwriters, and (vi) coordinating syndicate orders in this offering. The upfront structuring and syndication fees paid to Morgan Stanley & Co. LLC will not exceed             % of the total public offering price of the Common Shares sold in this offering. These services provided by Morgan Stanley & Co. LLC are unrelated to the Investment Manager’s or the Sub-Adviser’s function of advising the Fund as to its investments in securities or use of investment strategies and investment techniques.

The Sub-Adviser (and not the Fund) has agreed to pay to each of Citigroup Global Markets Inc., Merrill Lynch, Pierce, Fenner & Smith Incorporated, UBS Securities LLC, Wells Fargo Securities, LLC and Barclays Capital Inc., from its own assets, a structuring fee for advice relating to the structure, design and organization of the Fund as well as services related to the sale and distribution of the Common Shares in the amount of $            , $            , $            , $             and $            , respectively. The structuring fee paid to each of Citigroup Global Markets Inc., Merrill Lynch, Pierce, Fenner & Smith Incorporated, UBS Securities LLC, Wells Fargo Securities, LLC and Barclays Capital Inc., will not exceed             %,             %,             %,             % and             %, respectively, of the total public offering price of the Common Shares sold in this offering.

The Sub-Adviser (and not the Fund) also may pay certain qualifying underwriters a structuring fee, additional compensation or a sales incentive fee in connection with this offering. The total amounts of these payments paid to any qualifying underwriter, excluding the underwriters named above but including those named below, will not exceed             % of the total public offering price of the Common Shares sold in this offering.

As part of the Fund’s payment of the Fund’s offering expenses, the Fund has agreed to pay expenses related to the filing fees incident to, and the reasonable fees and disbursements of counsel to the underwriters in connection with, the review by the Financial Industry Regulatory Authority, Inc. (“FINRA”) of the terms of the sale of the Common Shares.

Total underwriting compensation determined in accordance with FINRA rules is summarized as follows. The sales load the Fund will pay of $1.125 per share is equal to 4.50% of gross proceeds. The Fund has agreed to reimburse the underwriters the reasonable fees and disbursements of counsel to the underwriters in connection with the review by FINRA of the terms of the sale of the Common Shares in an amount not to exceed $             in the aggregate, which amount will not exceed             % of the total public offering price of the Fund’s Common Shares. The Sub-Adviser (and not the Fund) will pay a structuring and/or syndication fee to Morgan Stanley & Co. LLC, Citigroup Global Markets Inc., Merrill Lynch, Pierce, Fenner & Smith Incorporated, UBS Securities LLC, Wells Fargo Securities, LLC, and Barclays Capital Inc., which in the aggregate will not exceed $            . Total compensation to the underwriters will not exceed 9.0% of gross proceeds.

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CUSTODIAN AND TRANSFER AGENT

The custodian of the assets of the Fund is State Street Bank and Trust Company. The custodian performs custodial and fund accounting services as well as sub-administrative and compliance services on behalf of the Fund.

BNY Mellon Investment Servicing (US) Inc., P.O. Box 358035, Pittsburgh, PA 15252 serves as the Fund’s transfer agent, registrar, dividend disbursement agent and shareholder servicing agent, as well as agent for the Fund’s Dividend Reinvestment Plan.

LEGAL MATTERS

Certain legal matters will be passed on for the Fund by Ropes & Gray LLP, Boston, Massachusetts. Certain legal matters will be passed upon for the underwriters by Davis Polk & Wardwell LLP.

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APPENDIX A

DESCRIPTION OF SECURITIES RATINGS

The Fund’s investments may range in quality from securities rated in the lowest category to securities rated in the highest category (as rated by Moody’s, S&P or Fitch or, if unrated, determined by PIMCO to be of comparable quality). The percentage of the Fund’s assets invested in securities in a particular rating category will vary. The following terms are generally used to described the credit quality of fixed income securities:

High Quality Debt Securities are those rated in one of the two highest rating categories (the highest category for commercial paper) or, if unrated, deemed comparable by PIMCO.

Investment Grade Debt Securities are those rated in one of the four highest rating categories or, if unrated deemed comparable by PIMCO.

Below Investment Grade, High Yield Securities (“Junk Bonds”) are those rated lower than Baa3 by Moody’s or BBB by S&P or Fitch and comparable securities. They are considered predominantly speculative with respect to the issuer’s ability to repay principal and interest.

The following is a description of Moody’s, S&P’s and Fitch’s rating categories applicable to fixed income securities.

MOODY’S LONG-TERM RATINGS

Moody’s long-term ratings are opinions of the relative credit risk of financial obligations with an original maturity of one year or more. They address the possibility that a financial obligation will not be honored as promised. Such ratings use Moody’s Global Scale and reflect both the likelihood of default and any financial loss suffered in the event of default.

Aaa: Obligations rated Aaa are judged to be of the highest quality, with minimal credit risk.

Aa: Obligations rated Aa are judged to be of high quality and are subject to very low credit risk.

A: Obligations rated A are considered upper-medium grade and are subject to low credit risk.

Baa: Obligations rated Baa are subject to moderate credit risk. They are considered medium-grade and as such may possess certain speculative characteristics.

Ba: Obligations rated Ba are judged to have speculative elements and are subject to substantial credit risk.

B: Obligations rated B are considered speculative and are subject to high credit risk.

Caa: Obligations rated Caa are judged to be of poor standing and are subject to very high credit risk.

Ca: Obligations rated Ca are highly speculative and are likely in, or very near, default, with some prospect of recovery of principal and interest.

C: Obligations rated C are the lowest rated class and are typically in default, with little prospect for recovery of principal or interest.

Moody’s applies numerical modifiers, 1, 2, and 3 to each generic rating classified from Aa through Caa. The modifier 1 indicates that the obligation ranks in the higher end of its generic rating category; the modifier 2 indicates a mid-range ranking; and the modifier 3 indicates that the issue ranks in the lower end of its generic rating category.

Corporate short-term debt ratings

Moody’s short-term debt ratings are opinions of the ability of issuers to repay punctually senior debt obligations which have an original maturity not exceeding one year. Obligations relying upon support mechanisms such as letters of credit and bonds of indemnity are excluded unless explicitly rated.

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Moody’s employs the following three designations, all judged to be investment grade, to indicate the relative repayment ability of rated issuers:

P-1: Issuers (or supporting institutions) rated Prime-1 have a superior ability to repay short-term debt obligations.

P-2: Issuers (or supporting institutions) rated Prime-2 have a strong ability to repay short-term debt obligations.

P-3: Issuers (or supporting institutions) rated Prime-3 have an acceptable ability to repay short-term obligations.

N-P: Issuers (or supporting institutions) rated Not Prime do not fall within any of the Prime rating categories.

Short-term municipal bond ratings

There are three rating categories for short-term municipal obligations that are considered investment grade. These ratings are designated as Municipal Investment Grade (MIG) and are divided into three levels—MIG 1 through MIG 3. In addition, those short-term obligations that are of speculative quality are designated SG, or speculative grade. MIG ratings expire at the maturity of the obligation.

MIG 1: This designation denotes superior credit quality. Excellent protection is afforded by established cash flows, highly reliable liquidity support, or demonstrated broad-based access to the market for refinancing.

MIG 2: This designation denotes strong credit quality. Margins of protection are ample, although not as large as in the preceding group.

MIG 3: This designation denotes acceptable credit quality. Liquidity and cash-flow protection may be narrow, and market access for refinancing is likely to be less well-established.

SG: This designation denotes speculative-grade credit quality. Debt instruments in this category may lack sufficient margins of protection.

In the case of variable-rate demand obligations (VRDOs), a two-component rating is assigned; a long or short-term debt rating and a demand obligation rating. The first element represents Moody’s evaluation of the degree of risk associated with scheduled principal and interest payments. The second element represents Moody’s evaluation of the degree of risk associated with the ability to receive purchase price upon demand (“demand feature”), using a variation of the MIG rating scale, the Variable Municipal Investment Grade or VMIG rating.

When either the long- or short-term aspect of a VRDO is not rated, that piece is designated NR, e.g. , Aaa/NR or NR/VMIG 1.

VMIG rating expirations are a function of each issue’s specific structural or credit features.

VMIG 1: This designation denotes superior credit quality. Excellent protection is afforded by the superior short-term credit strength of the liquidity provider and structural and legal protections that ensure the timely payment of purchase price upon demand.

VMIG 2: This designation denotes strong credit quality. Good protection is afforded by the strong short-term credit strength of the liquidity provider and structural and legal protections that ensure the timely payment of purchase price upon demand.

VMIG 3: This designation denotes acceptable credit quality. Adequate protection is afforded by the satisfactory short-term credit strength of the liquidity provider and structural and legal protections that ensure the timely payment of purchase price upon demand.

SG: This designation denotes speculative-grade credit quality. Demand features rated in this category may be supported by a liquidity provider that does not have an investment grade short-term rating or may lack the structural and/or legal protections necessary to ensure the timely payment of purchase price upon demand.

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STANDARD & POOR’S RATINGS SERVICES

Corporate and municipal bond ratings

Long-term issue credit ratings

Issue credit ratings are based, in varying degrees, on the following considerations:

Issue ratings are an assessment of default risk, but may incorporate an assessment of relative seniority or ultimate recovery in the event of default. Junior obligations are typically rated lower than senior obligations, to reflect the lower priority in bankruptcy, as noted above. (Such differentiation may apply when an entity has both senior and subordinated obligations, secured and unsecured obligations, or operating company and holding company obligations.)

AAA: An obligation rated ‘AAA’ has the highest rating assigned by Standard & Poor’s. The obligor’s capacity to meet its financial commitment on the obligation is extremely strong.

AA: An obligation rated ‘AA’ differs from the highest-rated obligations only to a small degree. The obligor’s capacity to meet its financial commitment on the obligation is very strong.

A: An obligation rated ‘A’ is somewhat more susceptible to the adverse effects of changes in circumstances and economic conditions than obligations in higher-rated categories. However, the obligor’s capacity to meet its financial commitment on the obligation is still strong.

BBB: An obligation rated ‘BBB’ exhibits adequate protection parameters. However, adverse economic conditions or changing circumstances are more likely to lead to a weakened capacity of the obligor to meet its financial commitment on the obligation.

Obligations rated ‘BB’, ‘B’, ‘CCC’, ‘CC’, and ‘C’ are regarded as having significant speculative characteristics. ‘BB’ indicates the least degree of speculation and ‘C’ the highest. While such obligations will likely have some quality and protective characteristics, these may be outweighed by large uncertainties or major exposures to adverse conditions.

BB: An obligation rated ‘BB’ is less vulnerable to nonpayment than other speculative issues. However, it faces major ongoing uncertainties or exposure to adverse business, financial, or economic conditions which could lead to the obligor’s inadequate capacity to meet its financial commitment on the obligation.

B: An obligation rated ‘B’ is more vulnerable to nonpayment than obligations rated ‘BB’, but the obligor currently has the capacity to meet its financial commitment on the obligation. Adverse business, financial, or economic conditions will likely impair the obligor’s capacity or willingness to meet its financial commitment on the obligation.

CCC: An obligation rated ‘CCC’ is currently vulnerable to nonpayment, and is dependent upon favorable business, financial, and economic conditions for the obligor to meet its financial commitment on the obligation. In the event of adverse business, financial, or economic conditions, the obligor is not likely to have the capacity to meet its financial commitment on the obligation.

CC: An obligation rated ‘CC’ is currently highly vulnerable to nonpayment.

C: A ‘C’ rating is assigned to obligations that are currently highly vulnerable to nonpayment, obligations that have payment arrearages allowed by the terms of the documents, or obligations of an issuer that is the subject of a bankruptcy petition or similar action which have not experienced a payment default. Among others, the

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‘C’ rating may be assigned to subordinated debt, preferred stock or other obligations on which cash payments have been suspended in accordance with the instrument’s terms or when preferred stock is the subject of a distressed exchange offer, whereby some or all of the issue is either repurchased for an amount of cash or replaced by other instruments having a total value that is less than par.

D: An obligation rated ‘D’ is in payment default. The ‘D’ rating category is used when payments on an obligation, including a regulatory capital instrument, are not made on the date due, unless Standard & Poor’s believes that such payments will be made within the shorter of the stated grace period but not longer than five business days. Both a longer stated grace period and the absence of a stated grace period are irrelevant. The ‘D’ rating also will be used upon the filing of a bankruptcy petition or the taking of similar action if payments on an obligation are jeopardized. An obligation’s rating is lowered to ‘D’ upon completion of a distressed exchange offer, whereby some or all of the issue is either repurchased for an amount of cash or replaced by other instruments having a total value that is less than par.

Plus (+) or Minus (-): The ratings from AA to CCC may be modified by the addition of a plus (+) or minus (-) sign to show relative standing within the major rating categories.

NR: This indicates that no rating has been requested, that there is insufficient information on which to base a rating, or that S&P does not rate a particular obligation as a matter of policy.

Short-Term Issue Credit Ratings

A-1: A short-term obligation rated ‘A-1’ is rated in the highest category by Standard & Poor’s. The obligor’s capacity to meet its financial commitment on the obligation is strong. Within this category, certain obligations are designated with a plus sign (+). This indicates that the obligor’s capacity to meet its financial commitment on these obligations is extremely strong.

A-2: A short-term obligation rated ‘A-2’ is somewhat more susceptible to the adverse effects of changes in circumstances and economic conditions than obligations in higher rating categories. However, the obligor’s capacity to meet its financial commitment on the obligation is satisfactory.

A-3: A short-term obligation rated ‘A-3’ exhibits adequate protection parameters. However, adverse economic conditions or changing circumstances are more likely to lead to a weakened capacity of the obligor to meet its financial commitment on the obligation.

B: A short-term obligation rated ‘B’ is regarded as having significant speculative characteristics. The obligor currently has the capacity to meet its financial commitment on the obligation; however, it faces major ongoing uncertainties which could lead to the obligor’s inadequate capacity to meet its financial commitment on the obligation.

C: A short-term obligation rated ‘C’ is currently vulnerable to nonpayment and is dependent upon favorable business, financial, and economic conditions for the obligor to meet its financial commitment on the obligation.

D: A short-term obligation rated ‘D’ is in payment default. The ‘D’ rating category is used when payments on an obligation, including a regulatory capital instrument, are not made on the date due even if the applicable grace period has not expired, unless Standard & Poor’s believes that such payments will be made during such grace period. The ‘D’ rating also will be used upon the filing of a bankruptcy petition or the taking of a similar action if payments on an obligation are jeopardized.

Active qualifiers (currently applied and/or outstanding)

i: This subscript is used for issues in which the credit factors, terms, or both, that determine the likelihood of receipt of payment of interest are different from the credit factors, terms or both that determine the likelihood of receipt of principal on the obligation. The ‘i’ subscript indicates that the rating addresses the interest portion of the obligation only. The ‘i’ subscript will always be used in conjunction with the ‘p’ subscript, which addresses likelihood of receipt of principal. For example, a rated obligation could be assigned ratings of “AAAp NRi” indicating that the principal portion is rated “AAA” and the interest portion of the obligation is not rated.

L: Ratings qualified with ‘L’ apply only to amounts invested up to federal deposit insurance limits.

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P: This subscript is used for issues in which the credit factors, the terms, or both, that determine the likelihood of receipt of payment of principal are different from the credit factors, terms or both that determine the likelihood of receipt of interest on the obligation. The ‘p’ subscript indicates that the rating addresses the principal portion of the obligation only. The ‘p’ subscript will always be used in conjunction with the ‘i’ subscript, which addresses likelihood of receipt of interest. For example, a rated obligation could be assigned ratings of “AAAp NRi” indicating that the principal portion is rated “AAA” and the interest portion of the obligation is not rated.

pi: Ratings with a ‘pi’ subscript are based on an analysis of an issuer’s published financial information, as well as additional information in the public domain. They do not, however, reflect in-depth meetings with an issuer’s management and are therefore based on less comprehensive information than ratings without a ‘pi’ subscript. Ratings with a ‘pi’ subscript are reviewed annually based on a new year’s financial statements, but may be reviewed on an interim basis if a major event occurs that may affect the issuer’s credit quality.

Preliminary: Preliminary ratings, with the ‘prelim’ qualifier, may be assigned to obligors or obligations, including financial programs, in the circumstances described below. Assignment of a final rating is conditional on the receipt by Standard & Poor’s of appropriate documentation. Standard & Poor’s reserves the right not to issue a final rating. Moreover, if a final rating is issued, it may differ from the preliminary rating.

sf: The (sf) subscript is assigned to all issues and issuers to which a regulation, such as the European Union Regulation on Credit Rating Agencies, requires the assignment of an additional symbol which distinguishes a structured finance instrument or obligor (as defined in the regulation) from any other instrument or obligor. The addition of this subscript to a credit rating does not change the definition of that rating or our opinion about the issue’s or issuer’s creditworthiness.

t: This symbol indicates termination structures that are designed to honor their contracts to full maturity or, should certain events occur, to terminate and cash settle all their contracts before their final maturity date.

Unsolicited: Unsolicited ratings are those credit ratings assigned at the initiative of Standard & Poor’s and not at the request of the issuer or its agents.

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Inactive qualifiers (no longer applied or outstanding)

*: This symbol indicated continuance of the ratings is contingent upon Standard & Poor’s receipt of an executed copy of the escrow agreement or closing documentation confirming investments and cash flows. Discontinued use in August 1998.

c: This qualifier was used to provide additional information to investors that the bank may terminate its obligation to purchase tendered bonds if the long-term credit rating of the issuer is below an investment-grade level and/or the issuer’s bonds are deemed taxable. Discontinued use in January 2001.

G: The letter ‘G’ followed the rating symbol when a fund’s portfolio consists primarily of direct U. S. government securities.

pr: The letters ‘pr’ indicate that the rating is provisional. A provisional rating assumes the successful completion of the project financed by the debt being rated and indicates that payment of debt service requirements is largely or entirely dependent upon the successful, timely completion of the project. This rating, however, while addressing credit quality subsequent to completion of the project, makes no comment on the likelihood of or the risk of default upon failure of such completion. The investor should exercise his own judgment with respect to such likelihood and risk.

q: A ‘q’ subscript indicates that the rating is based solely on quantitative analysis of publicly available information. Discontinued use in April 2001.

r: The ‘r’ modifier was assigned to securities containing extraordinary risks, particularly market risks, that are not covered in the credit rating. The absence of an ‘r’ modifier should not be taken as an indication that an obligation will not exhibit extraordinary non-credit related risks. Standard & Poor’s discontinued the use of the ‘r’ modifier for most obligations in June 2000 and for the balance of obligations (mainly structured finance transactions) in November 2002.

Local Currency and Foreign Currency Risks: Country risk considerations are a standard part of Standard & Poor’s analysis for credit ratings on any issuer or issue. Currency of repayment is a key factor in this analysis. An obligor’s capacity to repay foreign currency obligations may be lower than its capacity to repay obligations in its local currency due to the sovereign government’s own relatively lower capacity to repay external versus domestic debt. These sovereign risk considerations are incorporated in the debt ratings assigned to specific issues. Foreign currency issuer ratings are also distinguished from local currency issuer ratings to identify those instances where sovereign risks make them different for the same issuer.

FITCH, INC.

A brief description of the applicable Fitch ratings symbols and meanings (as published by Fitch) follows:

Long-term credit ratings

Long-Term Credit Ratings

AAA: Highest credit quality. “AAA” ratings denote the lowest expectation of default risk. They are assigned only in case of exceptionally strong capacity for payment of financial commitments. This capacity is highly unlikely to be adversely affected by foreseeable events.

AA: Very high credit quality. “AA” ratings denote expectations of very low default risk. They indicate very strong capacity for payment of financial commitments. This capacity is not significantly vulnerable to foreseeable events.

A: High credit quality. “A” ratings denote expectations of low default risk. The capacity for payment of financial commitments is considered strong. This capacity may, nevertheless, be more vulnerable to adverse business or economic conditions than is the case for higher ratings.

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BBB: Good credit quality. “BBB” ratings indicate that expectations of default risk are currently low. The capacity for payment of financial commitments is considered adequate but adverse business or economic conditions are more likely to impair this capacity.

BB: Speculative. “BB” ratings indicate an elevated vulnerability to default risk, particularly in the event of adverse changes in business or economic conditions over time; however, business or financial flexibility exists which supports the servicing of financial commitments.

B: Highly speculative. “B” ratings indicate that material default risk is present, but a limited margin of safety remains. Financial commitments are currently being met; however, capacity for continued payment is vulnerable to deterioration in the business and economic environment.

CCC: Substantial credit risk. Default is a real possibility.

CC: Very high levels of credit risk. Default of some kind appears probable.

C: Exceptionally high levels of credit risk. Default is imminent or inevitable, or the issuer is in standstill. Conditions that are indicative of a ‘C’ category rating for an issuer include: (a) the issuer has entered into a grace or cure period following non-payment of a material financial obligation; (b) the issuer has entered into a temporary negotiated waiver or standstill agreement following a payment default on a material financial obligation; or (c) Fitch Ratings otherwise believes a condition of ‘RD’ or ‘D’ to be imminent or inevitable, including through the formal announcement of a distressed debt exchange.

RD: Restricted Default: ‘RD’ ratings indicate an issuer that in Fitch Ratings’ opinion has experienced an uncured payment default on a bond, loan or other material financial obligation but which has not entered into bankruptcy filings, administration, receivership, liquidation or other formal winding-up procedure, and which has not otherwise ceased operating. This would include: (a) the selective payment default on a specific class or currency of debt; (b) the uncured expiry of any applicable grace period, cure period or default forbearance period following a payment default on a bank loan, capital markets security or other material financial obligation; (c) the extension of multiple waivers or forbearance periods upon a payment default on one or more material financial obligations, either in series or in parallel; or (d) execution of a distressed debt exchange on one or more material financial obligations.

D. Default: ‘D’ ratings indicate an issuer that in Fitch Ratings’ opinion has entered into bankruptcy filings, administration, receivership, liquidation or other formal winding-up procedure, or which has otherwise ceased business.

Note: The modifiers “+” or “-” may be appended to a rating to denote relative status within major rating categories. Such suffixes are not added to the ‘AAA’ Long-Term IDR category, or to Long-Term IDR categories below ‘B’.

Recovery Ratings

Recovery Ratings are assigned to selected individual securities and obligations. These currently are published for most individual obligations of corporate issuers with IDRs in the ‘B’ rating category and below.

Among the factors that affect recovery rates for securities are the collateral, the seniority relative to other obligations in the capital structure (where appropriate), and the expected value of the company or underlying collateral in distress.

The Recovery Rating scale is based upon the expected relative recovery characteristics of an obligation upon the curing of a default, emergence from insolvency or following the liquidation or termination of the obligor or its associated collateral.

Recovery Ratings are an ordinal scale and do not attempt to precisely predict a given level of recovery. As a guideline in developing the rating assessments, the agency employs broad theoretical recovery bands in its ratings approach based on historical averages, but actual recoveries for a given security may deviate materially from historical averages.

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RR1: Outstanding recovery prospects given default. “RR1” rated securities have characteristics consistent with securities historically recovering 91%-100% of current principal and related interest.

RR2: Superior recovery prospects given default. “RR2” rated securities have characteristics consistent with securities historically recovering 71%-90% of current principal and related interest.

RR3: Good recovery prospects given default. “RR3” rated securities have characteristics consistent with securities historically recovering 51%-70% of current principal and related interest.

RR4: Average recovery prospects given default. “RR4” rated securities have characteristics consistent with securities historically recovering 31%-50% of current principal and related interest.

RR5: Below average recovery prospects given default. “RR5” rated securities have characteristics consistent with securities historically recovering 11%-30% of current principal and related interest.

RR6: Poor recovery prospects given default. “RR6” rated securities have characteristics consistent with securities historically recovering 0%-10% of current principal and related interest.

Short-Term Ratings Assigned to Obligations in Corporate, Public and Structured Finance

A short-term issuer or obligation rating is based in all cases on the short-term vulnerability to default of the rated entity or security stream and relates to the capacity to meet financial obligations in accordance with the documentation governing the relevant obligation. Short-Term Ratings are assigned to obligations whose initial maturity is viewed as “short term” based on market convention. Typically, this means up to 13 months for corporate, sovereign, and structured obligations, and up to 36 months for obligations in U.S. public finance markets.

F1: Highest credit quality. Indicates the strongest intrinsic capacity for timely payment of financial commitments; may have an added “+” to denote any exceptionally strong credit feature.

F2: Good short-term credit quality. Good intrinsic capacity for timely payment of financial commitments.

F3: Fair short-term credit quality. The intrinsic capacity for timely payment of financial commitments is adequate.

B: Speculative short-term credit quality. Minimal capacity for timely payment of financial commitments, plus vulnerability to near-term adverse changes in financial and economic conditions.

C: High short-term default risk. Default is a real possibility.

RD: Restricted Default. Indicates an entity that has defaulted on one or more of its financial commitments, although it continues to meet other financial obligations. Applicable to entity ratings only.

D: Default. Indicates a broad-based default event for an entity, or the default of a short-term obligation.

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Until            , 2012 (25 days after the commencement of this offering), all dealers that buy, sell or trade the Common Shares, whether or not participating in this offering, may be required to deliver a prospectus. This delivery requirement is in addition to the dealers’ obligation to deliver a prospectus when acting as underwriters and with respect to their unsold allotments or subscriptions.

                 Shares

PIMCO Dynamic Income Fund

Common Shares

$25.00 per Share

PROSPECTUS

Morgan Stanley

Citigroup

BofA Merrill Lynch

UBS Investment Bank

Wells Fargo Securities

Barclays

RBC Capital Markets

BB&T Capital Markets

Chardan Capital Markets, LLC

Henley & Company LLC

J.J.B Hilliard, W.L. Lyons, LLC

Janney Montgomery Scott

Ladenburg Thalmann & Co. Inc.

Maxim Group LLC

Wedbush Securities Inc.

Wunderlich Securities

                , 2012

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The information in this Statement of Additional Information is not complete and may be changed. We may not sell these securities until the registration statement filed with the Securities and Exchange Commission is effective. This Statement of Additional Information, which is not a prospectus, is not an offer to sell these securities and it is not soliciting an offer to buy these securities in any state or jurisdiction where the offer or sale is not permitted.

SUBJECT TO COMPLETION

DATED May 11, 2012

PIMCO DYNAMIC INCOME FUND

Statement of Additional Information

            , 2012

PIMCO DYNAMIC INCOME FUND (the “Fund”) is a newly organized, non-diversified, closed-end management investment company.

This Statement of Additional Information relating to the common shares of the Fund (the “Common Shares”) is not a prospectus, and should be read in conjunction with the Fund’s prospectus relating thereto dated             , 2012 (the “Prospectus”). This Statement of Additional Information does not include all information that a prospective investor should consider before purchasing Common Shares, and investors should obtain and read the Prospectus prior to purchasing such shares. A copy of the Prospectus may be obtained without charge by calling (800) 254-5197. You may also obtain a copy of the Prospectus on the Web site of the Securities and Exchange Commission (the “SEC”) at http://www.sec.gov. Capitalized terms used but not defined in this Statement of Additional Information have the meanings ascribed to them in the Prospectus.

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THE FUND

The Fund was formed on January 19, 2011 as a Massachusetts business trust.

INVESTMENT OBJECTIVES AND POLICIES

The investment objectives and general investment policies of the Fund are described in the Prospectus. Additional information concerning the characteristics of certain of the Fund’s investments is set forth below.

High Yield Securities (“Junk Bonds”)

The Fund may invest in debt instruments that are, at the time of purchase, rated below investment grade (below Baa3 by Moody’s Investors Service, Inc. (“Moody’s”), below BBB- by either Standard & Poor’s, a division of the McGraw Hill Companies (“S&P”), or Fitch, Inc. (“Fitch Ratings”)), or unrated but determined by PIMCO to be of comparable quality. However, the Fund will not normally invest more than 20% of its total assets in debt instruments, other than mortgage-related and other asset-backed securities, that are, at the time of purchase, rated CCC+ or lower by S&P and Fitch and Caa1 or lower by Moody’s, or that are unrated but determined by PIMCO to be of comparable quality to securities so rated. The Fund may invest without limitation in mortgage-related and other asset-backed securities regardless of rating— i.e. , of any credit quality. Below investment grade securities are commonly referred to as “high yield” securities or “junk bonds.”

Investments in high yield securities generally provide greater income and increased opportunity for capital appreciation than investments in higher quality securities, but they also typically entail greater potential price volatility and principal and income risk, including the possibility of issuer default and bankruptcy. High yield securities may be regarded as predominantly speculative with respect to the issuer’s continuing ability to make timely principal and interest payments. Debt securities in the lowest investment grade category also may be considered to possess some speculative characteristics by certain rating agencies. In addition, analysis of the creditworthiness of issuers of high yield securities may be more complex than for issuers of higher quality securities.

High yield securities may be more susceptible to real or perceived adverse economic and competitive industry conditions than investment grade securities. A projection of an economic downturn or of a period of rising interest rates, for example, could cause a decline in high yield security prices because the advent of a recession could lessen the ability of an issuer to make principal and interest payments on its debt obligations. If an issuer of high yield securities defaults, in addition to risking non-payment of all or a portion of interest and principal, the Fund may incur additional expenses to seek recovery. The market prices of high yield securities structured as zero-coupon, step-up or payment-in-kind securities will normally be affected to a greater extent by interest rate changes, and therefore tend to be more volatile than the prices of securities that pay interest currently and in cash.

The secondary market on which high yield securities are traded may be less liquid than the market for investment grade securities. Less liquidity in the secondary trading market could adversely affect the price at which the Fund could sell a high yield security, and could adversely

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affect the net asset value of the shares. Adverse publicity and investor perceptions, whether or not based on fundamental analysis, may decrease the values and liquidity of high yield securities, especially in a thinly-traded market. When secondary markets for high yield securities are less liquid than the market for investment grade securities, it may be more difficult to value the lower rated securities because such valuation may require more research, and elements of judgment may play a greater role in the valuation because there is less reliable, objective data available. During periods of thin trading in these markets, the spread between bid and asked prices is likely to increase significantly and the Fund may have greater difficulty selling its portfolio securities. The Fund will be more dependent on PIMCO’s research and analysis when investing in high yield securities.

The Fund’s credit quality policies apply only at the time a security is purchased, and the Fund is not required to dispose of a security in the event that a rating agency or PIMCO downgrades its assessment of the credit characteristics of a particular issue. In determining whether to retain or sell such a security, PIMCO may consider factors including, but not limited to, PIMCO’s assessment of the credit quality of the issuer of such security, the price at which such security could be sold and the rating, if any, assigned to such security by other rating agencies. Analysis of creditworthiness may be more complex for issuers of high yield securities than for issuers of higher quality debt securities.

A general description of the ratings of securities by Moody’s, S&P and Fitch Ratings is set forth in Appendix A to the Prospectus. The ratings of Moody’s, S&P, and Fitch Ratings represent their opinions as to the quality of the securities they rate. It should be emphasized, however, that ratings are general and are not absolute standards of quality. Consequently, debt obligations with the same maturity, coupon and rating may have different yields while obligations with the same maturity and coupon with different ratings may have the same yield. For these reasons, the use of credit ratings as the sole method of evaluating high yield securities can involve certain risks. For example, credit ratings evaluate the safety of principal and interest payments, not the market value risk of high yield securities. Also, credit rating agencies may fail to change credit ratings in a timely fashion to reflect events since the security was last rated. PIMCO relies primarily on its own analysis of the credit quality and risks associated with individual debt instruments considered for the Fund, rather than relying exclusively on rating agencies or third-party research.

Distressed Securities

Securities in which the Fund invests may be subject to significant risk of an issuer’s inability to meet principal and interest payments on the obligations and also may be subject to price volatility due to such factors as market perception of the creditworthiness of an issuer and general market liquidity. If PIMCO’s evaluation of the anticipated outcome of an investment situation should prove incorrect, such Fund investments could experience a loss.

Mortgage-Related and Other Asset-Backed Securities

The Fund may invest in a variety of mortgage-related and other asset-backed securities issued by government agencies or other governmental entities or by private originators or issuers.

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As a matter of fundamental policy, the Fund will normally invest at least 25% of its total assets in privately-issued (commonly known as “non-agency”) mortgage-related securities.

Mortgage-related securities are interests in pools of residential or commercial mortgage loans, including mortgage loans made by savings and loan institutions, mortgage bankers, commercial banks and others. Pools of mortgage loans are assembled as securities for sale to investors by various governmental, government-related and private organizations. The value of some mortgage-related or asset-backed securities in which the Fund invests may be particularly sensitive to changes in prevailing interest rates, and, like other debt securities, the ability of the Fund to successfully utilize these instruments may depend in part upon the ability of PIMCO to forecast certain macro-economic factors correctly. See “–Mortgage Pass-Through Securities” below. Certain debt obligations are also secured with collateral consisting of mortgage-related securities. See “–Collateralized Mortgage Obligations (“CMOs”)” below.

The mortgage-related securities in which the Fund may invest may pay variable or fixed rates of interest.

Through investments in mortgage-related securities, including those that are issued by private issuers, the Fund may have some exposure to subprime loans as well as to the mortgage and credit markets generally. Private issuers include commercial banks, savings associations, mortgage companies, investment banking firms, finance companies and special purpose finance entities (called special purpose vehicles or SPVs) and other entities that acquire and package mortgage loans for resale as mortgage-related securities.

In addition, mortgage-related securities that are issued by private issuers are not subject to the underwriting requirements for the underlying mortgages that are applicable to those mortgage-related securities that have a government or government-sponsored entity guarantee. As a result, the mortgage loans underlying private mortgage-related securities may, and frequently do, have less favorable collateral, credit risk or other underwriting characteristics than government or government-sponsored mortgage-related securities and have wider variances in a number of terms including interest rate, term, size, purpose and borrower characteristics. Privately issued pools more frequently include second mortgages, high loan-to-value mortgages and manufactured housing loans. The coupon rates and maturities of the underlying mortgage loans in a private-label mortgage-related securities pool may vary to a greater extent than those included in a government guaranteed pool, and the pool may include subprime mortgage loans. Subprime loans refer to loans made to borrowers with weakened credit histories or with a lower capacity to make timely payments on their loans. For these reasons, the loans underlying these securities have had in many cases higher default rates than those loans that meet government underwriting requirements.

The risk of non-payment is greater for mortgage-related securities that are backed by mortgage pools that contain subprime loans, but a level of risk exists for all loans. Market factors adversely affecting mortgage loan repayments may include a general economic turndown, high unemployment, a general slowdown in the real estate market, a drop in the market prices of real estate, or an increase in interest rates resulting in higher mortgage payments by holders of adjustable rate mortgages.

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The recent financial downturn—particularly the increase in delinquencies and defaults on residential mortgages, falling home prices, and unemployment—has adversely affected the market for mortgage-related securities. In addition, various market and governmental actions may impair the ability to foreclose on or exercise other remedies against underlying mortgage holders, or may reduce the amount received upon foreclosure. These factors have caused certain mortgage-related securities to experience lower valuations and reduced liquidity. There is also no assurance that the U.S. Government will take further action to support the mortgage-related securities industry, as it has in the past, should the economic downturn continue or the economy experience another downturn. Further, recent legislative action and any future government actions may significantly alter the manner in which the mortgage-related securities market functions. Each of these factors could ultimately increase the risk that a Fund could realize losses on mortgage-related securities.

Mortgage Pass-Through Securities. Mortgage pass-through securities are securities representing interests in “pools” of mortgage loans secured by residential or commercial real property. Interests in pools of mortgage-related securities differ from other forms of debt securities, which normally provide for periodic payment of interest in fixed or variable amounts with principal payments at maturity or specified call dates. Instead, these securities provide a monthly payment which consists of both interest and principal payments. In effect, these payments are a “pass-through” of the monthly payments made by the individual borrowers on their residential or commercial mortgage loans, net of any fees paid to the issuer or guarantor of such securities. Additional payments are caused by repayments of principal resulting from the sale of the underlying property, refinancing or foreclosure, net of fees or costs that may be incurred. Some mortgage-related securities (such as securities issued by the Government National Mortgage Association (“GNMA”)) are described as “modified pass-through.” These securities entitle the holder to receive all interest and principal payments owed on the mortgage pool, net of certain fees, at the scheduled payment dates regardless of whether or not the mortgagor actually makes the payment.

The rate of prepayments on underlying mortgages will affect the price and volatility of a mortgage-related security, and may have the effect of shortening or extending the effective duration of the security relative to what was anticipated at the time of purchase. Early repayment of principal on some mortgage-related securities (arising from prepayments of principal due to the sale of the underlying property, refinancing, or foreclosure, net of fees and costs which may be incurred) may expose the Fund to a lower rate of return upon reinvestment of principal. Also, if a security subject to prepayment has been purchased at a premium, the value of the premium would be lost in the event of prepayment. Like other fixed-rate debt obligations, when interest rates rise, the value of a fixed-rate mortgage-related security generally will decline; however, when interest rates are declining, the value of fixed-rate mortgage-related securities with prepayment features may not increase as much as other debt obligations. Adjustable rate mortgage-related and other asset-backed securities are also subject to some interest rate risk. For example, because interest rates on most adjustable rate mortgage- and other asset-backed securities only reset periodically ( e.g. , monthly or quarterly), changes in prevailing interest rates (and particularly sudden and significant changes) can be expected to cause some fluctuations in the market value of these securities, including declines in value as interest rates rise. In addition, to the extent that unanticipated rates of prepayment on underlying mortgages increase the effective duration of a mortgage-related security, the volatility of such security can be expected to increase.

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The residential mortgage market in the United States recently has experienced difficulties that may adversely affect the performance and market value of certain of the Fund’s mortgage-related investments. Delinquencies and losses on residential mortgage loans (especially subprime and second-lien mortgage loans) generally have increased recently and may continue to increase, and a decline in or flattening of housing values (as has recently been experienced and may continue to be experienced in many housing markets) may exacerbate such delinquencies and losses. Borrowers with adjustable rate mortgage loans are more sensitive to changes in interest rates, which affect their monthly mortgage payments, and may be unable to secure replacement mortgages at comparably low interest rates. Also, a number of residential mortgage loan originators have recently experienced serious financial difficulties or bankruptcy. Owing largely to the foregoing, reduced investor demand for mortgage loans and mortgage-related securities and increased investor yield requirements have caused limited liquidity in the secondary market for certain mortgage-related securities, which can adversely affect the market value of mortgage-related securities. It is possible that such limited liquidity in such secondary markets could continue or worsen.

Agency Mortgage-Related Securities. Payment of principal and interest on some mortgage pass-through securities (but not the market value of the securities themselves) may be guaranteed by the full faith and credit of the U.S. Government (in the case of securities guaranteed by GNMA) or guaranteed by agencies or instrumentalities of the U.S. Government (in the case of securities guaranteed by the Federal National Mortgage Association (“FNMA”) or the Federal Home Loan Mortgage Corporation (“FHLMC”)). The principal governmental guarantor of mortgage-related securities is GNMA. GNMA is a wholly-owned U.S. Government corporation within the Department of Housing and Urban Development. GNMA is authorized to guarantee, with the full faith and credit of the U.S. Government, the timely payment of principal and interest on securities issued by institutions approved by GNMA (such as savings and loan institutions, commercial banks and mortgage bankers) and backed by pools of mortgages insured by the Federal Housing Administration (the “FHA”), or guaranteed by the Department of Veterans Affairs (the “VA”).

Government-related guarantors ( i.e. , not backed by the full faith and credit of the U.S. Government) include the FNMA and the FHLMC. FNMA was, until recently, a government-sponsored corporation owned entirely by private stockholders and subject to general regulation by the Department of Housing and Urban Development and the Office of Federal Housing Enterprise Oversight. As described below, FNMA is now under conservatorship by the FHFA. FNMA primarily purchases conventional ( i.e. , not insured or guaranteed by any government agency) residential mortgages from a list of approved seller/servicers, which includes state and federally chartered savings and loan associations, mutual savings banks, commercial banks, and credit unions and mortgage bankers, although it may purchase other types of mortgages as well. Pass-through securities issued by FNMA are guaranteed as to timely payment of principal and interest by FNMA but are not backed by the full faith and credit of the U.S. Government.

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Instead, they are supported only by the discretionary authority of the U.S. Government to purchase the agency’s obligations.

FHLMC was created by Congress in 1970 for the purpose of increasing the availability of mortgage credit for residential housing. As described below, FHLMC is now under in conservatorship by the FHFA. FHLMC issues Participation Certificates (“PCs”) which represent interests in conventional mortgages from FHLMC’s national portfolio. FHLMC guarantees the timely payment of interest and ultimate collection of principal, but PCs are not backed by the full faith and credit of the U.S. Government. Instead, they are supported only by the discretionary authority of the U.S. Government to purchase the agency’s obligations.

On September 6, 2008, the Federal Housing Finance Agency (“FHFA”) placed FNMA and FHLMC into conservatorship. As the conservator, FHFA succeeded to all rights, titles, powers and privileges of FNMA and FHLMC and of any stockholder, officer or director of FNMA and FHLMC with respect to FNMA and FHLMC and the assets of FNMA and FHLMC. FHFA selected a new chief executive officer and chairman of the board of directors for each of FNMA and FHLMC.

On September 7, 2008, the U.S. Treasury announced three additional steps taken by it in connection with the conservatorship. First, the U.S. Treasury entered into a Senior Preferred Stock Purchase Agreement with each of FNMA and FHLMC pursuant to which the U.S. Treasury will purchase up to an aggregate of $100 billion of each of FNMA and FHLMC to maintain a positive net worth in each enterprise. This agreement contains various covenants that severely limit each enterprise’s operations. In exchange for entering into these agreements, the U.S. Treasury received $1 billion of each enterprise’s senior preferred stock and warrants to purchase 79.9% of each enterprise’s common stock. Second, the U.S. Treasury announced the creation of a new secured lending facility which is available to each of FNMA and FHLMC as a liquidity backstop. Third, the U.S. Treasury announced the creation of a temporary program to purchase mortgage-backed securities issued by each of FNMA and FHLMC. On February 18, 2009, the U.S. Treasury announced that it was doubling the size of its commitment to each enterprise under the Senior Preferred Stock Program to $200 billion. The U.S. Treasury’s obligations under the Senior Preferred Stock Program are for an indefinite period of time for a maximum amount of $200 billion per enterprise.

On December 24, 2009, the U.S. Treasury announced further amendments to the Senior Preferred Stock Purchase Agreements which included additional financial support to certain governmentally supported entities, including the Federal Home Loan Banks (“FHLBs”), FNMA and FHLMC, there is no assurance that the obligations of such entities will be satisfied in full, or that such obligations will not decrease in value or default. It is difficult, if not impossible, to predict the future political, regulatory or economic changes that could impact the FNMA, FHLMC and the FHLBs, and the values of their related securities or obligations.

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FNMA and FHLMC are continuing to operate as going concerns while in conservatorship and each remain liable for all of its obligations, including its guaranty obligations, associated with its mortgage-backed securities.

Under the Federal Housing Finance Regulatory Reform Act of 2008 (the “Reform Act”), which was included as part of the Housing and Economic Recovery Act of 2008, FHFA, as conservator or receiver, has the power to repudiate any contract entered into by FNMA or FHLMC prior to FHFA’s appointment as conservator or receiver, as applicable, if FHFA determines, in its sole discretion, that performance of the contract is burdensome and that repudiation of the contract promotes the orderly administration of FNMA’s or FHLMC’s affairs. The Reform Act requires FHFA to exercise its right to repudiate any contract within a reasonable period of time after its appointment as conservator or receiver.

FHFA, in its capacity as conservator, has indicated that it has no intention to repudiate the guaranty obligations of FNMA or FHLMC because FHFA views repudiation as incompatible with the goals of the conservatorship. However, in the event that FHFA, as conservator or if it is later appointed as receiver for FNMA or FHLMC, were to repudiate any such guaranty obligation, the conservatorship or receivership estate, as applicable, would be liable for actual direct compensatory damages in accordance with the provisions of the Reform Act. Any such liability could be satisfied only to the extent of FNMA’s or FHLMC’s assets available therefor.

In the event of repudiation, the payments of interest to holders of FNMA or FHLMC mortgage-backed securities would be reduced if payments on the mortgage loans represented in the mortgage loan groups related to such mortgage-backed securities are not made by the borrowers or advanced by the servicer. Any actual direct compensatory damages for repudiating these guaranty obligations may not be sufficient to offset any shortfalls experienced by such mortgage-backed security holders.

Further, in its capacity as conservator or receiver, FHFA has the right to transfer or sell any asset or liability of FNMA or FHLMC without any approval, assignment or consent. Although FHFA has stated that it has no present intention to do so, if FHFA, as conservator or receiver, were to transfer any such guaranty obligation to another party, holders of FNMA or FHLMC mortgage-backed securities would have to rely on that party for satisfaction of the guaranty obligation and would be exposed to the credit risk of that party.

In addition, certain rights provided to holders of mortgage-backed securities issued by FNMA and FHLMC under the operative documents related to such securities may not be enforced against FHFA, or enforcement of such rights may be delayed, during the conservatorship or any future receivership. The operative documents for FNMA and FHLMC mortgage-backed securities may provide (or with respect to securities issued prior to the date of the appointment of the conservator may have provided) that upon the occurrence of an event of default on the part of FNMA or FHLMC, in its capacity as guarantor, which includes the appointment of a conservator or receiver, holders of such mortgage-backed securities have the right to replace FNMA or FHLMC as trustee if the requisite percentage of mortgage-backed securities holders consent. The Reform Act prevents mortgage-backed security holders from enforcing such rights if the event of default arises solely because a conservator or receiver has been appointed. The Reform

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Act also provides that no person may exercise any right or power to terminate, accelerate or declare an event of default under certain contracts to which FNMA or FHLMC is a party, or obtain possession of or exercise control over any property of FNMA or FHLMC, or affect any contractual rights of FNMA or FHLMC, without the approval of FHFA, as conservator or receiver, for a period of 45 or 90 days following the appointment of FHFA as conservator or receiver, respectively.

In addition, in a February 2011 report to Congress from the Treasury Department and the Department of Housing and Urban Development, the Obama administration provided a plan to reform America’s housing finance market. The plan would reduce the role of and eventually eliminate FNMA and FHLMC. Notably, the plan does not propose similar significant changes to GNMA, which guarantees payments on mortgage-related securities backed by federally insured or guaranteed loans such as those issued by the Federal Housing Association or guaranteed by the Department of Veterans Affairs. The report also identified three proposals for Congress and the administration to consider for the long-term structure of the housing finance markets after the elimination of FNMA and FHLMC, including implementing: (i) a privatized system of housing finance that limits government insurance to very limited groups of creditworthy low- and moderate-income borrowers; (ii) a privatized system with a government backstop mechanism that would allow the government to insure a larger share of the housing finance market during a future housing crisis; and (iii) a privatized system where the government would offer reinsurance to holders of certain highly-rated mortgage-related securities insured by private insurers and would pay out under the reinsurance arrangements only if the private mortgage insurers were insolvent.

Privately Issued Mortgage-Related (Non-Agency) Securities. Commercial banks, savings and loan institutions, private mortgage insurance companies, mortgage bankers and other secondary market issuers also create pass-through pools of conventional residential mortgage loans. Such issuers may be the originators and/or servicers of the underlying mortgage loans as well as the guarantors of the mortgage-related securities. Pools created by such non-governmental issuers generally offer a higher rate of interest than government and government-related pools because there are no direct or indirect government or agency guarantees of payments in such pools. However, timely payment of interest and principal of these pools may be supported by various forms of insurance or guarantees, including individual loan, title, pool and hazard insurance and letters of credit. The insurance and guarantees are issued by governmental entities, private insurers and the mortgage poolers. There can be no assurance that the private insurers or guarantors can meet their obligations under the insurance policies or guarantee arrangements. Securities issued by certain private organizations may not be readily marketable.

Privately issued mortgage-related securities are not subject to the same underwriting requirements for the underlying mortgages that are applicable to those mortgage-related securities that have a government or government-sponsored entity guarantee. As a result, the mortgage loans underlying privately issued mortgage-related securities may, and frequently do, have less favorable collateral, credit risk or other underwriting characteristics than government or government-sponsored mortgage-related securities and have wider variances in a number of terms including interest rate, term, size, purpose and borrower characteristics. Mortgage pools

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underlying privately issued mortgage-related securities more frequently include second mortgages, high loan-to-value ratio mortgages and manufactured housing loans, in addition to commercial mortgages and other types of mortgages where a government or government-sponsored entity guarantee is not available. The coupon rates and maturities of the underlying mortgage loans in a privately-issued mortgage-related securities pool may vary to a greater extent than those included in a government guaranteed pool, and the pool may include subprime mortgage loans. Subprime loans are loans made to borrowers with weakened credit histories or with a lower capacity to make timely payments on their loans. For these reasons, the loans underlying these securities have had in many cases higher default rates than those loans that meet government underwriting requirements. The risk of non-payment is greater for mortgage-related securities that are backed by loans that were originated under weak underwriting standards, including loans made to borrowers with limited means to make repayment. A level of risk exists for all loans, although, historically, the poorest performing loans have been those classified as subprime. Other types of privately issued mortgage-related securities, such as those classified as pay-option adjustable rate or Alt-A have also performed poorly. Even loans classified as prime have experienced higher levels of delinquencies and defaults. The substantial decline in real property values across the U.S. has exacerbated the level of losses that investors in privately issued mortgage-related securities have experienced. It is not certain when these trends may reverse. Market factors that may adversely affect mortgage loan repayment include adverse economic conditions, unemployment, a decline in the value of real property, or an increase in interest rates.

Privately issued mortgage-related securities are not traded on an exchange and there may be a limited market for the securities, especially when there is a perceived weakness in the mortgage and real estate market sectors. Without an active trading market, mortgage-related securities held in a Fund’s portfolio may be particularly difficult to value because of the complexities involved in assessing the value of the underlying mortgage loans.

The Fund may purchase privately issued mortgage-related securities that are originated, packaged and serviced by third party entities. It is possible these third parties could have interests that are in conflict with the holders of mortgage-related securities, and such holders (such as the Fund) could have rights against the third parties or their affiliates. For example, if a loan originator, servicer or its affiliates engaged in negligence or willful misconduct in carrying out its duties, then a holder of the mortgage-related security could seek recourse against the originator/servicer or its affiliates, as applicable. Also, as a loan originator/servicer, the originator/servicer or its affiliates may make certain representations and warranties regarding the quality of the mortgages and properties underlying a mortgage-related security. If one or more of those representations or warranties is false, then the holders of the mortgage-related securities (such as the Fund) could trigger an obligation of the originator/servicer or its affiliates, as applicable, to repurchase the mortgages from the issuing trust. Notwithstanding the foregoing, many of the third parties that are legally bound by trust and other documents have failed to perform their respective duties, as stipulated in such trust and other documents, and investors have had limited success in enforcing terms.

Mortgage-related securities that are issued or guaranteed by the U.S. Government, its agencies or instrumentalities, are not subject to the Fund’s industry concentration restriction (see

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“Investment Restrictions”) by virtue of the exclusion from that restriction available to all U.S. Government securities. The assets underlying such securities may be represented by a portfolio of first lien residential mortgages (including both whole mortgage loans and mortgage participation interests) or portfolios of mortgage pass-through securities issued or guaranteed by GNMA, FNMA or FHLMC. Mortgage loans underlying a mortgage-related security may in turn be insured or guaranteed by the FHA or the VA. In the case of privately issued mortgage-related securities whose underlying assets are neither U.S. Government securities nor U.S. Government insured mortgages, to the extent that real properties securing such assets may be located in the same geographical region, the security may be subject to a greater risk of default than other comparable securities in the event of adverse economic, political or business developments that may affect such region and, ultimately, the ability of residential homeowners to make payments of principal and interest on the underlying mortgages.

Collateralized Mortgage Obligations (“CMOs”). A CMO is a debt obligation of a legal entity that is collateralized by mortgages and divided into classes. Similar to a bond, interest and prepaid principal is paid, in most cases, on a monthly basis. CMOs may be collateralized by whole mortgage loans or private mortgage bonds, but are generally collateralized by portfolios of mortgage pass-through securities guaranteed by GNMA, FHLMC, or FNMA, and their income streams.

CMOs are structured into multiple classes, often referred to as “tranches,” with each class bearing a different stated maturity and entitled to a different schedule for payments of principal and interest, including pre-payments. Actual maturity and average life will depend upon the pre-payment experience of the collateral. In the case of certain CMOs (known as “sequential pay” CMOs), payments of principal received from the pool of underlying mortgages, including pre-payments, are applied to the classes of CMOs in the order of their respective final distribution dates. Thus, no payment of principal will be made to any class of sequential pay CMOs until all other classes having an earlier final distribution date have been paid in full.

In a typical CMO transaction, a corporation (“issuer”) issues multiple series ( e.g. , A, B, C, Z) of CMO bonds (“Bonds”). Proceeds of the Bond offering are used to purchase mortgages or mortgage pass-through certificates (“Collateral”). The Collateral is pledged to a third party trustee as security for the Bonds. Principal and interest payments from the Collateral are used to pay principal on the Bonds in the order A, B, C, Z. The Series A, B, and C Bonds all bear current interest. Interest on the Series Z Bond is accrued and added to principal and a like amount is paid as principal on the Series A, B, or C Bond currently being paid off. When the Series A, B, and C Bonds are paid in full, interest and principal on the Series Z Bond begins to be paid currently.

CMOs may be less liquid and may exhibit greater price volatility than other types of mortgage- or asset-backed securities.

As CMOs have evolved, some classes of CMO bonds have become more common. For example, the Fund may invest in parallel-pay and planned amortization class (“PAC”) CMOs and multi-class pass through certificates. Parallel-pay CMOs and multi-class pass-through certificates are structured to provide payments of principal on each payment date to more than one class. These simultaneous payments are taken into account in calculating the stated maturity date or final

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distribution date of each class, which, as with other CMO and multi-class pass-through structures, must be retired by its stated maturity date or final distribution date but may be retired earlier. PACs generally require payments of a specified amount of principal on each payment date. PACs are parallel-pay CMOs with the required principal amount on such securities having the highest priority after interest has been paid to all classes. Any CMO or multi-class pass through structure that includes PAC securities must also have support tranches—known as support bonds, companion bonds or non-PAC bonds—which lend or absorb principal cash flows to allow the PAC securities to maintain their stated maturities and final distribution dates within a range of actual prepayment experience. These support tranches are subject to a higher level of maturity risk compared to other mortgage-related securities, and usually provide a higher yield to compensate investors. If principal cash flows are received in amounts outside a pre-determined range such that the support bonds cannot lend or absorb sufficient cash flows to the PAC securities as intended, the PAC securities are subject to heightened maturity risk. The Fund may invest in various tranches of CMO bonds, including support bonds.

FHLMC Collateralized Mortgage Obligations. FHLMC CMOs are debt obligations of FHLMC issued in multiple classes having different maturity dates which are secured by the pledge of a pool of conventional mortgage loans purchased by FHLMC. Payments of principal and interest on the CMOs are made semi-annually, as opposed to monthly. The amount of principal payable on each semi-annual payment date is determined in accordance with FHLMC’s mandatory sinking fund schedule, which in turn, is equal to approximately 100% of FHA prepayment experience applied to the mortgage collateral pool. All sinking fund payments in the CMOs are allocated to the retirement of the individual classes of bonds in the order of their stated maturities. Payments of principal on the mortgage loans in the collateral pool in excess of the amount of FHLMC’s minimum sinking fund obligation for any payment date are paid to the holders of the CMOs as additional sinking fund payments. Because of the “pass-through” nature of all principal payments received on the collateral pool in excess of FHLMC’s minimum sinking fund requirement, the rate at which principal of the CMOs is actually repaid is likely to be such that each class of bonds will be retired in advance of its scheduled maturity date.

If collection of principal (including prepayments) on the mortgage loans during any semi-annual payment period is not sufficient to meet FHLMC’s minimum sinking fund obligation on the next sinking fund payment date, FHLMC agrees to make up the deficiency from its general funds.

Criteria for the mortgage loans in the pool backing the FHLMC CMOs are identical to those of FHLMC PCs. FHLMC has the right to substitute collateral in the event of delinquencies and/or defaults.

Commercial Mortgage-Backed Securities. Commercial mortgage-backed securities include securities that reflect an interest in, and are secured by, mortgage loans on commercial real property. Many of the risks of investing in commercial mortgage-backed securities reflect the risks of investing in the real estate securing the underlying mortgage loans. These risks reflect the effects of local and other economic conditions on real estate markets, the ability of tenants to make loan payments, and the ability of a property to attract and retain tenants. Commercial mortgage-backed securities may be less liquid and exhibit greater price volatility than other types of mortgage- or asset-backed securities.

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CMO Residuals. CMO residuals are mortgage securities issued by agencies or instrumentalities of the U.S. Government or by private originators of, or investors in, mortgage loans, including savings and loan associations, homebuilders, mortgage banks, commercial banks, investment banks and special purpose entities of the foregoing.

The cash flow generated by the mortgage assets underlying a series of CMOs is applied first to make required payments of principal and interest on the CMOs and second to pay the related administrative expenses and any management fee of the issuer. The residual in a CMO structure generally represents the interest in any excess cash flow remaining after making the foregoing payments. Each payment of such excess cash flow to a holder of the related CMO residual represents income and/or a return of capital. The amount of residual cash flow resulting from a CMO will depend on, among other things, the characteristics of the mortgage assets, the coupon rate of each class of CMO, prevailing interest rates, the amount of administrative expenses and the prepayment experience on the mortgage assets in the same manner as an interest only (“IO”) class of stripped mortgage-backed securities. In particular, the yield to maturity on CMO residuals is extremely sensitive to prepayments on the related underlying mortgage assets. In addition, if a series of a CMO includes a class that bears interest at an adjustable rate, the yield to maturity on the related CMO residual will also be extremely sensitive to changes in the level of the index upon which interest rate adjustments are based. The Fund may fail to recoup some or all of its initial investment in a CMO residual.

CMO residuals are generally purchased and sold by institutional investors through several investment banking firms acting as brokers or dealers. The CMO residual market has developed fairly recently and CMO residuals currently may not have the liquidity of other more established securities trading in other markets. CMO residuals may, or pursuant to an exemption therefrom, may not, have been registered under the Securities Act of 1933, as amended (the “Securities Act”). CMO residuals, whether or not registered under the Securities Act, may be subject to certain restrictions on transferability, and may be deemed “illiquid.” As used in this Statement of Additional Information, the term CMO residual does not include residual interests in real estate mortgage investment conduits.

Adjustable Rate Mortgage Backed Securities. Adjustable rate mortgage-backed securities (“ARMs”) have interest rates that reset at periodic intervals. Acquiring ARMs permits the Fund to participate in increases in prevailing current interest rates through periodic adjustments in the coupons of mortgages underlying the pool on which ARMs are based. Such ARMs generally have higher current yield and lower price fluctuations than is the case with more traditional fixed income debt securities of comparable rating and maturity. In addition, when prepayments of principal are made on the underlying mortgages during periods of rising interest rates, the Fund can reinvest the proceeds of such prepayments at rates higher than those at which they were previously invested. Mortgages underlying most ARMs, however, have limits on the allowable annual or lifetime increases that can be made in the interest rate that the mortgagor pays. Therefore, if current interest rates rise above such limits over the period of the limitation, the Fund, when holding an ARM, does not benefit from further increases in interest rates. Moreover, when interest rates are in excess of coupon rates ( i.e. , the rates being paid by mortgagors) of the mortgages, ARMs behave more like fixed income securities and less like adjustable rate securities and are subject to the risks associated with fixed income securities. In

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addition, during periods of rising interest rates, increases in the coupon rate of adjustable rate mortgages generally lag current market interest rates slightly, thereby creating the potential for capital depreciation on such securities.

Stripped Mortgage-Backed Securities . SMBS are derivative multi-class mortgage securities. SMBS may be issued by agencies or instrumentalities of the U.S. Government, or by private originators of, or investors in, mortgage loans, including savings and loan associations, mortgage banks, commercial banks, investment banks and special purpose entities of the foregoing.

SMBS are usually structured with two classes that receive different proportions of the interest and principal distributions on a pool of mortgage assets. A common type of SMBS will have one class receiving some of the interest and most of the principal from the mortgage assets, while the other class will receive most of the interest and the remainder of the principal. In the most extreme case, one class will receive all of the interest (the “IO” class), while the other class will receive all of the principal (the principal-only or “PO” class). The yield to maturity on an IO class is extremely sensitive to the rate of principal payments (including pre-payments) on the related underlying mortgage assets, and a rapid rate of principal payments may have a material adverse effect on the Fund’s yield to maturity from these securities. If the underlying mortgage assets experience greater than anticipated pre-payments of principal, the Fund may fail to recoup some or all of its initial investment in these securities even if the security is in one of the highest rating categories.

Other Mortgage-Related Securities. Other mortgage-related securities include securities other than those described above that directly or indirectly represent a participation in, or are secured by and payable from, mortgage loans on real property, including CMO residuals and stripped mortgage-backed securities. Other mortgage-related securities may be equity or debt securities issued by agencies or instrumentalities of the U.S. Government or by private originators of, or investors in, mortgage loans, including savings and loan associations, homebuilders, mortgage banks, commercial banks, investment banks, partnerships, trusts and special purpose entities of the foregoing.

Asset-Backed Securities. The Fund may invest in, or have exposure to, asset-backed securities, which are securities that represent a participation in, or are secured by and payable from, a stream of payments generated by particular assets, most often a pool or pools of similar assets ( e.g. , trade receivables). The credit quality of these securities depends primarily upon the quality of the underlying assets and the level of credit support and/or enhancement provided.

The underlying assets ( e.g. , loans) are subject to prepayments that shorten the securities’ weighted average maturity and may lower their return. If the credit support or enhancement is exhausted, losses or delays in payment may result if the required payments of principal and interest are not made. The value of these securities also may change because of changes in the market’s perception of the creditworthiness of the servicing agent for the pool, the originator of the pool, or the financial institution or trust providing the credit support or enhancement. Typically, there is no perfected security interest in the collateral that relates to the financial assets that support asset-backed securities. Asset-backed securities have many of the same characteristics and risks as the mortgage backed securities described above.

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The Fund may purchase or have exposure to commercial paper, including asset-backed commercial paper (“ABCP”), that is issued by structured investment vehicles or other conduits. These conduits may be sponsored by mortgage companies, investment banking firms, finance companies, hedge funds, private equity firms and special purpose finance entities. ABCP typically refers to a short-term debt security, the payment of which is supported by cash flows from underlying assets, or one or more liquidity or credit support providers, or both. Assets backing ABCP include credit card, car loan and other consumer receivables and home or commercial mortgages, including subprime mortgages. The repayment of ABCP issued by a conduit depends primarily on the cash collections received from the conduit’s underlying asset portfolio and the conduit’s ability to issue new ABCP. Therefore, there could be losses to the Fund if investing in ABCP in the event of credit or market value deterioration in the conduit’s underlying portfolio, mismatches in the timing of the cash flows of the underlying asset interests and the repayment obligations of maturing ABCP, or the conduit’s inability to issue new ABCP. To protect investors from these risks, ABCP programs may be structured with various protections, such as credit enhancement, liquidity support, and commercial paper stop-issuance and wind-down triggers. However there can be no guarantee that these protections will be sufficient to prevent losses to investors in ABCP. Some ABCP programs provide for an extension of the maturity date of the ABCP if, on the related maturity date, the conduit is unable to access sufficient liquidity through the issue of additional ABCP. This may delay the sale of the underlying collateral and the Fund may incur a loss if the value of the collateral deteriorates during the extension period. Alternatively, if collateral for ABCP deteriorates in value, the collateral may be required to be sold at inopportune times or at prices insufficient to repay the principal and interest on the ABCP. ABCP programs may provide for the issuance of subordinated notes as an additional form of credit enhancement. The subordinated notes are typically of a lower credit quality and have a higher risk of default. To the extent the Fund purchases these subordinated notes, it will have a higher likelihood of loss than investors in the senior notes.

Some ABS, particularly home equity loan transactions, are subject to interest-rate risk and prepayment risk. A change in interest rates can affect the pace of payments on the underlying loans, which in turn, affects total return on the securities. ABS also carry credit or default risk. If many borrowers on the underlying loans default, losses could exceed the credit enhancement level and result in losses to investors in an ABS transaction. Finally, ABS have structure risk due to a unique characteristic known as early amortization, or early payout, risk. Built into the structure of most ABS are triggers for early payout, designed to protect investors from losses. These triggers are unique to each transaction and can include: a big rise in defaults on the underlying loans, a sharp drop in the credit enhancement level, or even the bankruptcy of the originator. Once early amortization begins, all incoming loan payments (after expenses are paid) are used to pay investors as quickly as possible based upon a predetermined priority of payment.

Collateralized Debt Obligations. The Fund may invest in Collateralized Debt Obligations (“CDOs”), which include, among other things, collateralized bond obligations (“CBOs”), collateralized loan obligations (“CLOs”) and other similarly structured securities. CBOs and CLOs are types of asset-backed securities. A CBO is a trust which is often backed by a diversified pool of high risk, below investment grade fixed income securities. The collateral can

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be from many different types of fixed income securities such as high yield debt, residential privately issued mortgage-related securities, commercial privately issued mortgage-related securities, trust preferred securities and emerging market debt. A CLO is a trust typically collateralized by a pool of loans, which may include, among others, domestic and non-U.S. senior secured loans, senior unsecured loans, and subordinate corporate loans, including loans that may be rated below investment grade or equivalent unrated loans. CDOs may charge management fees and administrative expenses.

For both CBOs and CLOs, the cash flows from the trust are split into two or more portions, called tranches, varying in risk and yield. The riskiest portion is the residual or “equity” tranche which bears the bulk of defaults from the bonds or loans in the trust and serves to protect the other, more senior tranches from default in all but the most severe circumstances. Since it is partially protected from defaults, a senior tranche from a CBO trust or CLO trust typically has higher ratings and lower yields than the underlying securities, and can be rated investment grade. Despite the protection from the equity tranche, CBO or CLO tranches can experience substantial losses due to actual defaults, downgrades of the underlying collateral by rating agencies, forced liquidation of the collateral pool due to a failure of coverage tests, increased sensitivity to defaults due to collateral default and disappearance of protecting tranches, market anticipation of defaults, as well as aversion to CBO or CLO securities as a class. Interest on certain tranches of a CDO may be paid in kind or deferred and capitalized (paid in the form of obligations of the same type rather than cash), which involves continued exposure to default risk with respect to such payments.

The risks of an investment in a CDO depend largely on the type of the collateral securities and the class of the CDO in which the Fund invests. Normally, CBOs, CLOs and other CDOs are privately offered and sold, and thus, are not registered under the securities laws. As a result, investments in CDOs may be characterized by the Fund as illiquid securities; however, an active dealer market, or other relevant measures of liquidity, may exist for CDOs allowing a CDO to potentially to be deemed liquid by PIMCO under liquidity policies approved by the Fund’s Board. In addition to the risks associated with debt instruments ( e.g. , interest rate risk and credit risk), CDOs carry additional risks that include, but are not limited to: (i) the possibility that distributions from collateral securities will not be adequate to make interest or other payments; (ii) the risk that the collateral may default or decline in value or be downgraded, if rated by a nationally recognized statistical rating organization (“NRSRO”); (iii) the possibility that the Fund may invest in tranches of CDOs that are subordinate to other tranches; (iv) the structure and complexity of the transaction and the legal documents could lead to disputes among investors regarding the characterization of proceeds; (v) the investment return achieved by the Fund could be significantly different than those predicted by financial models; (vi) the lack of a readily available secondary market for CDOs; (vii) risk of forced “fire sale” liquidation due to technical defaults such as coverage test failures; and (viii) the CDO’s manager may perform poorly.

Other Asset-Backed Securities. Other asset-backed securities (unrelated to mortgage loans) will be offered to investors in the future and may be purchased by the Fund. Several types of asset-backed securities have already been offered to investors, including Enhanced Equipment Trust Certificates (“EETCs”) and Certificates for Automobile Receivables ^SM (“CARS ^SM ”).

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Enhanced Equipment Trust Certificates (“EETCs”) are typically issued by specially-created trusts established by airlines, railroads, or other transportation corporations. The proceeds of EETCs are used to purchase equipment, such as airplanes, railroad cars, or other equipment, which in turn serve as collateral for the related issue of the EETCs. The equipment generally is leased by the airline, railroad or other corporation, which makes rental payments to provide the projected cash flow for payments to EETC holders. Holders of EETCs must look to the collateral securing the certificates, typically together with a guarantee provided by the lessee corporation or its parent company for the payment of lease obligations, in the case of default in the payment of principal and interest on the EETCs. However, because principal and interest payments on EETCs are funded in the ordinary course by the lessee corporation, the Fund treats EETCs as corporate bonds/obligations for purposes of compliance testing and related classifications.

CARS ^SM represent undivided fractional interests in a trust whose assets consist of a pool of motor vehicle retail installment sales contracts and security interests in the vehicles securing the contracts. Payments of principal and interest on CARS ^SM are passed through monthly to certificate holders, and are guaranteed up to certain amounts and for a certain time period by a letter of credit issued by a financial institution unaffiliated with the trustee or originator of the trust. An investor’s return on CARS ^SM may be affected by early prepayment of principal on the underlying vehicle sales contracts. If the letter of credit is exhausted, the trust may be prevented from realizing the full amount due on a sales contract because of state law requirements and restrictions relating to foreclosure sales of vehicles and the obtaining of deficiency judgments following such sales or because of depreciation, damage or loss of a vehicle, the application of federal and state bankruptcy and insolvency laws, or other factors. As a result, certificate holders may experience delays in payments or losses if the letter of credit is exhausted.

Consistent with the Fund’s investment objectives and policies, PIMCO also may invest in other types of mortgage-related and asset-backed securities offered currently or in the future. Other asset-backed securities may be collateralized by the fees earned by service providers. The value of asset-backed securities may be substantially dependent on the servicing of the underlying asset pools and are therefore subject to risks associated with the negligence by, or defalcation of, their servicers. In certain circumstances, the mishandling of related documentation may also affect the rights of the security holders in and to the underlying collateral. The insolvency of entities that generate receivables or that utilize the assets may result in added costs and delays in addition to losses associated with a decline in the value of the underlying assets.

Investors should note that Congress from time to time may consider actions that would limit or remove the explicit or implicit guarantee of the payment of principal and/or interest on many types of asset-backed securities. Any such action would likely adversely impact the value of such securities.

Real Estate Securities and Related Derivatives

The Fund may gain exposure to the real estate sector by investing in real estate-linked derivatives, real estate investment trusts (“REITs”) and common, preferred and convertible

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securities of issuers in real estate-related industries. Each of these types of investments is subject to risks similar to those associated with direct ownership of real estate, including loss to casualty or condemnation, increases in property taxes and operating expenses, zoning law amendments, changes in interest rates, overbuilding and increased competition, variations in market value and possible environmental liabilities. Real estate-related investments may entail leverage and may be highly volatile.

REITs are pooled investment vehicles that own, and typically operate, income-producing real estate. If a REIT meets certain requirements, including distributing to shareholders annually substantially all of its taxable income (other than net capital gains), then it is not taxed on the income distributed to shareholders. REITs are subject to management fees and other expenses, and so the Fund would bear its proportionate share of the costs of the REITs’ operations.

There are three general categories of REITs: equity REITs, mortgage REITs and hybrid REITs. Equity REITs invest primarily in direct fee ownership or leasehold ownership of real property; they derive most of their income from rents. Mortgage REITs invest mostly in mortgages on real estate, which may secure construction, development or long-term loans, and the main source of their income is mortgage interest payments. Hybrid REITs hold both ownership and mortgage interests in real estate.

Along with the risks common to different types of real estate-related securities, REITs, no matter the type, involve additional risk factors. These include poor performance by the REIT’s manager, changes to the tax laws, and failure by the REIT to qualify for tax-free distribution of income or exemption under the Investment Company Act of 1940, as amended (the “1940 Act”). Furthermore, REITs are not diversified and are heavily dependent on cash flow.

Foreign/Non-U.S. Securities

The Fund may invest without limit in instruments of corporate and other non-U. S./foreign issuers (and securities traded principally outside of the United States), including obligations of non-U.S. banks, non-U.S. governments or their subdivisions, agencies and instrumentalities, international agencies and supranational government entities and other issuers, and securities traded principally outside of the United States.

The foreign securities in which the Fund may invest include without limitation Eurodollar obligations and “Yankee Dollar” obligations. Eurodollar obligations are U.S. dollar-denominated certificates of deposit and time deposits issued outside the U.S. capital markets by non-U.S. branches of U.S. banks and by non-U.S. banks. Yankee Dollar obligations are U.S. dollar-denominated obligations issued in the U.S. capital markets by non-U.S. banks. Eurodollar and Yankee Dollar obligations are generally subject to the same risks that apply to domestic debt issues, notably credit risk, interest rate risk, market risk and liquidity risk. Additionally, Eurodollar (and to a limited extent, Yankee Dollar) obligations are subject to certain sovereign risks. One such risk is the possibility that a sovereign country might prevent capital, in the form of U.S. dollars, from flowing across its borders. Other risks include adverse political and economic developments; the extent and quality of government regulation of financial markets and institutions; the imposition of foreign withholding taxes; and the expropriation or nationalization of foreign issuers.

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The Fund may invest in American Depositary Receipts (“ADRs”), European Depositary Receipts (“EDRs”) or Global Depositary Receipts (“GDRs”). ADRs are U.S. dollar-denominated receipts issued generally by domestic banks and represent the deposit with the bank of a security of a non-U.S. issuer. EDRs are foreign currency-denominated receipts similar to ADRs and are issued and traded in Europe, and are publicly traded on exchanges or over-the-counter in the United States. GDRs may be offered privately in the United States and also trade in public or private markets in other countries. ADRs, EDRs and GDRs may be issued as sponsored or unsponsored programs. In sponsored programs, an issuer has made arrangements to have its securities trade in the form of ADRs, EDRs or GDRs. In unsponsored programs, the issuer may not be directly involved in the creation of the program. Although regulatory requirements with respect to sponsored and unsponsored programs are generally similar, in some cases it may be easier to obtain financial information from an issuer that has participated in the creation of a sponsored program.

The Fund may invest in Brady Bonds. Brady Bonds are securities created through the exchange of existing commercial bank loans to sovereign entities for new obligations in connection with debt restructurings under a debt restructuring plan introduced by former U.S. Secretary of the Treasury, Nicholas F. Brady (the “Brady Plan”). Brady Plan debt restructurings have been implemented in a number of countries, including: Albania, Argentina, Bolivia, Brazil, Bulgaria, Columbia, Costa Rica, the Dominican Republic, Ecuador, Ivory Coast, Jordan, Mexico, Morocco, Niger, Nigeria, Panama, Peru, the Philippines, Poland, Uruguay, Venezuela and Vietnam.

Brady Bonds may be collateralized or uncollateralized, are issued in various currencies (primarily the U.S. dollar) and are actively traded in the over-the-counter secondary market. Brady Bonds are not considered to be U.S. Government securities. U.S. dollar-denominated, collateralized Brady Bonds, which may be fixed rate par bonds or floating rate discount bonds, are generally collateralized in full as to principal by U.S. Treasury zero-coupon bonds having the same maturity as the Brady Bonds. Interest payments on these Brady Bonds generally are collateralized on a one-year or longer rolling-forward basis by cash or securities in an amount that, in the case of fixed rate bonds, is equal to at least one year of interest payments or, in the case of floating rate bonds, initially is equal to at least one year’s interest payments based on the applicable interest rate at that time and is adjusted at regular intervals thereafter. Certain Brady Bonds are entitled to “value recovery payments” in certain circumstances, which in effect constitute supplemental interest payments but generally are not collateralized. Brady Bonds are often viewed as having three or four valuation components: (i) the collateralized repayment of principal at final maturity; (ii) the collateralized interest payments; (iii) the uncollateralized interest payments; and (iv) any uncollateralized repayment of principal at maturity (the uncollateralized amounts constitute the “residual risk”).

A significant portion of the Argentine Brady Bonds issued to date have repayments at final maturity collateralized by U.S. Treasury zero-coupon bonds (or comparable collateral denominated in other currencies) and/or interest coupon payments collateralized on a 12-month rolling-forward basis by securities held by the Federal Reserve Bank of New York as collateral agent.

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Brady Bonds involve various risk factors including residual risk and the history of defaults with respect to commercial bank loans by public and private entities of countries issuing Brady Bonds. There can be no assurance that Brady Bonds in which the Fund may invest will not be subject to restructuring arrangements or to requests for new credit, which may cause the Fund to suffer a loss of interest or principal on any of its holdings.

Investing in the securities of non-U.S. issuers involves special risks and considerations not typically associated with investing in U.S. companies. These include: differences in accounting; auditing and financial reporting standards; generally higher commission rates on non-U.S. portfolio transactions; the possibility of expropriation or confiscatory taxation; adverse changes in investment or exchange control regulations (which may include suspension of the ability to transfer currency from a country); political instability which can affect U.S. investments in non-U.S. countries; and potential restrictions on the flow of international capital. In addition, non-U.S. securities and dividends and interest payable on those securities may be subject to non-U.S. taxes, including taxes withheld from payments on those securities. Non-U.S. securities often trade with less frequency and volume than domestic securities and therefore may exhibit greater price volatility. Changes in foreign exchange rates will affect the value of those securities which are denominated or quoted in currencies other than the U.S. dollar. The currencies of non-U.S. countries may experience significant declines against the U.S. dollar, and devaluation may occur subsequent to investments in these currencies by the Fund.

Emerging Market Securities . The Fund may normally invest up to 40% of its total assets in securities of issuers economically tied to “emerging market” countries. PIMCO generally considers an instrument to be economically tied to an emerging market country if the security’s “country of exposure” is an emerging market country, as determined by the criteria set forth below. Alternatively, such as when a “country of exposure” is not available or when PIMCO believes the following tests more accurately reflect which country the security is economically tied to, PIMCO may consider an instrument to be economically tied to an emerging market country if the issuer or guarantor is a government of an emerging market country (or any political subdivision, agency, authority or instrumentality of such government), if the issuer or guarantor is organized under the laws of an emerging market country, or if the currency of settlement of the security is a currency of an emerging market country. With respect to derivative instruments, PIMCO generally considers such instruments to be economically tied to emerging market countries if the underlying assets are currencies of emerging market countries (or baskets or indexes of such currencies), or instruments or securities that are issued or guaranteed by governments of emerging market countries or by entities organized under the laws of emerging market countries. An instrument’s “country of exposure” is determined by PIMCO using certain factors provided by a third-party analytical service provider. The factors are applied in order such that the first factor to result in the assignment of a country determines the “country of exposure.” The factors, listed in the order in which they are applied, are: (i) if an asset-backed or other collateralized security, the country in which the collateral backing the security is located, (ii) if the security is guaranteed by the government of a country (or any political subdivision, agency, authority or instrumentality of such government), the country of the government or instrumentality providing the guarantee, (iii) the “country of risk” of the issuer, (iv) the “country of risk” of the issuer’s ultimate parent, or (v) the country where the issuer is organized or

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incorporated under the laws thereof. “Country of risk” is a separate four-part test determined by the following factors, listed in order of importance: (i) management location, (ii) country of primary listing, (iii) sales or revenue attributable to the country, and (iv) reporting currency of the issuer. PIMCO has broad discretion to identify countries that it considers to qualify as emerging markets. Emerging market countries are generally located in Asia, Africa, the Middle East, Latin America and Eastern Europe, but may be in other regions as well. PIMCO will consider emerging market country and currency composition based on its evaluation of relative interest rates, inflation rates, exchange rates, monetary and fiscal policies, trade and current account balances, legal and political developments and any other specific factors it believes to be relevant.

Investment risk may be particularly high to the extent that the Fund invests in instruments economically tied to emerging market countries. These securities may present market, credit, currency, liquidity, legal, political and other risks different from, or greater than, the risks of investing in developed countries. The Fund may invest in emerging markets that may be in the process of opening to trans-national investment, which may increase these risks. Risks particular to emerging market countries include, but are not limited to, the following risks:

General Emerging Market Risk. The securities markets of countries in which the Fund may invest may be relatively small, with a limited number of companies representing a small number of industries. Additionally, issuers in countries in which the Fund may invest may not be subject to a high degree of regulation and the financial institutions with which the Fund may trade may not possess the same degree of financial sophistication, creditworthiness or resources as those in developed markets. Furthermore, the legal infrastructure and accounting, auditing and reporting standards in certain countries in which the Fund may invest may not provide the same degree of investor protection or information to investors as would generally apply in major securities markets.

Nationalization, expropriation or confiscatory taxation, currency blockage, political changes or diplomatic developments could adversely affect the Fund’s investments in a foreign country. In the event of nationalization, expropriation or other confiscation, the Fund could lose its entire investment in that country. Adverse conditions in a certain region can adversely affect securities of other countries whose economies appear to be unrelated. To the extent that the Fund invests a significant portion of assets in a concentrated geographic area, the Fund will generally have more exposure to regional economic risks associated with those investments.

Restrictions on Foreign Investment. A number of emerging securities markets restrict foreign investment to varying degrees. Furthermore, repatriation of investment income, capital and the proceeds of sales by foreign investors may require governmental registration and/or approval in some countries. While the Fund will only invest in markets where these restrictions are considered acceptable, new or additional repatriation or other restrictions might be imposed subsequent to the Fund’s investment. If such restrictions were to be imposed subsequent to the Fund’s investment in the securities markets of a particular country, the Fund’s response might include, among other things, applying to the appropriate authorities for a waiver of the restrictions or engaging in

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transactions in other markets designed to offset the risks of decline in that country. Such restrictions will be considered in relation to the Fund’s liquidity needs and all other acceptable positive and negative factors. Some emerging markets limit foreign investment, which may decrease returns relative to domestic investors. The Fund may seek exceptions to those restrictions. If those restrictions are present and cannot be avoided by the Fund, the Fund’s returns may be lower.

Settlement Risks. Settlement systems in emerging markets may be less well organized and less transparent than in developed markets and transactions may take longer to settle as a result. Supervisory authorities may also be unable to apply standards comparable with those in developed markets. Thus there may be risks that settlement may be delayed and that cash or securities belonging to the Fund may be in jeopardy because of failures of or defects in the systems. In particular, market practice may require that payment be made prior to receipt of the security which is being purchased or that delivery of a security must be made before payment is received. In such cases, default by a broker or bank through whom the relevant transaction is effected might result in a loss being suffered by the Fund. The Fund may not know the identity of a counterparty, which may increase the possibility of the Fund not receiving payment or delivery of securities in a transaction. The Fund seeks, when possible, to use counterparties whose financial status is such that this risk is reduced. However, there can be no certainty that the Fund will be successful in eliminating or reducing this risk, particularly as counterparties operating in developing countries frequently lack the substance, capitalization and/or financial resources of those in developed countries.

There may also be a danger that, because of uncertainties in the operation of settlement systems in individual markets, competing claims may arise in respect of securities held by or to be transferred to the Fund. Furthermore, compensation schemes may be non-existent, limited or inadequate to meet the Fund’s claims in any of these events.

Counterparty Risk. Trading in the securities of developing markets presents additional credit and financial risks. The Fund may have limited access to, or there may be a limited number of, potential counterparties that trade in the securities of emerging market issuers. Governmental regulations may restrict potential counterparties to certain financial institutions located or operating in the particular emerging market. Potential counterparties may not possess, adopt or implement creditworthiness standards, financial reporting standards or legal and contractual protections similar to those in developed markets. Currency hedging techniques may not be available or may be limited. The Fund may not be able to reduce or mitigate risks related to trading with emerging market counterparties. The Fund seeks, when possible, to use counterparties whose financial status is such that the risk of default is reduced, but the risk of losses resulting from default is still possible.

Government in the Private Sector. Government involvement in the private sector varies in degree among the emerging markets in which the Fund may invest. Such involvement may, in some cases, include government ownership of companies in certain sectors, wage and price controls or imposition of trade barriers and other protectionist measures. With

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respect to any developing country, there is no guarantee that some future economic or political crisis will not lead to price controls, forced mergers of companies, expropriation, or creation of government monopolies, to the possible detriment of the Fund’s investment in that country.

Litigation. The Fund may encounter substantial difficulties in obtaining and enforcing judgments against individuals and companies located in certain developing countries. It may be difficult or impossible to obtain or enforce legislation or remedies against governments, their agencies and sponsored entities.

Fraudulent Securities. It is possible, particularly in markets in developing countries, that purported securities in which the Fund invests may subsequently be found to be fraudulent and as a consequence the Fund could suffer losses.

Taxation. The local taxation of income and capital gains accruing to non-residents varies among developing countries and, in some cases, is comparatively high. In addition, developing countries typically have less well-defined tax laws and procedures and such laws may permit retroactive taxation so that the Fund could in the future become subject to local tax liabilities that had not been anticipated in conducting its investment activities or valuing its assets. The Fund seeks to reduce these risks by careful management of assets. However, there can be no assurance that these efforts will be successful.

Political Risks/Risks of Conflicts. Recently, various countries have seen significant internal conflicts and in some cases, civil wars may have had an adverse impact on the securities markets of the countries concerned. In addition, the occurrence of new disturbances due to acts of war or other political developments cannot be excluded. Apparently stable systems may experience periods of disruption or improbable reversals of policy. Nationalization, expropriation or confiscatory taxation, currency blockage, political changes, government regulation, political, regulatory or social instability or uncertainty or diplomatic developments could adversely affect the Fund’s investments. The transformation from a centrally planned, socialist economy to a more market oriented economy has also resulted in many economic and social disruptions and distortions. Moreover, there can be no assurance that the economic, regulatory and political initiatives necessary to achieve and sustain such a transformation will continue or, if such initiatives continue and are sustained, that they will be successful or that such initiatives will continue to benefit foreign (or non-national) investors. Certain instruments, such as inflation index instruments, may depend upon measures compiled by governments (or entities under their influence) which are also the obligors.

Sovereign Debt. The Fund may invest in sovereign debt issued by non-U.S. developed and emerging market governments and their respective sub-divisions, agencies or instrumentalities, government sponsored enterprises and supranational government entities. Supranational entities include international organizations that are organized or supported by one or more government entities to promote economic reconstruction or development and by international banking institutions and related governmental agencies. Investment in sovereign debt can involve a high degree of risk. The governmental entity that controls the repayment of sovereign debt may not be

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able or willing to repay the principal and/or interest when due in accordance with the terms of the debt. A governmental entity’s willingness or ability to repay principal and interest due in a timely manner may be affected by, among other factors, its cash flow situation, the extent of its foreign reserves, the availability of sufficient foreign exchange on the date a payment is due, the relative size of the debt service burden to the economy as a whole, the governmental entity’s policy toward the International Monetary Fund, and the political constraints to which a governmental entity may be subject. Governmental entities also may depend on expected disbursements from non-U.S. governments, multilateral agencies and others to reduce principal and interest arrearages on their debt. The commitment on the part of these governments, agencies and others to make such disbursements may be conditioned on a governmental entity’s implementation of economic reforms and/or economic performance and the timely service of such debtor’s obligations. Failure to implement such reforms, achieve such levels of economic performance or repay principal or interest when due may result in the cancellation of such third parties’ commitments to lend funds to the governmental entity, which may further impair such debtor’s ability or willingness to service its debts in a timely manner. Consequently, governmental entities may default on their sovereign debt. Holders of sovereign debt (including the Fund) may be requested to participate in the rescheduling of such debt and to extend further loans to governmental entities. There is no bankruptcy proceeding by which sovereign debt on which governmental entities have defaulted may be collected in whole or in part.

The Fund’s investments in foreign currency-denominated debt obligations and hedging activities will likely produce a difference between its book income and its taxable income. This difference may cause a portion of the Fund’s income distributions to constitute returns of capital for tax purposes or require the Fund to make distributions exceeding book income to qualify as a regulated investment company or to eliminate fund-level tax for U.S. federal income tax purposes.

Foreign Currency Transactions

Subject to the limitations discussed above and in the Prospectus, the Fund also may purchase and sell foreign currency options and foreign currency futures contracts and related options (see “–Derivative Instruments” below), and may engage in foreign currency transactions either on a spot (cash) basis at the rate prevailing in the currency exchange market at the time or through forward foreign currency exchange contracts (“forwards”) with terms generally of less than one year. The Fund may (but is not required to) engage in these transactions in order to protect against uncertainty in the level of future foreign exchange rates in the purchase and sale of securities. The Fund may also use foreign currency options and foreign currency forward contracts to increase exposure to a foreign currency or to shift exposure to foreign currency fluctuations from one country to another. Suitable currency hedging transactions may not be available in all circumstances and PIMCO may decide not to use hedging transactions that are available.

A forward foreign currency exchange contract involves an obligation to purchase or sell a specific currency at a future date, which may be any fixed number of days from the date of the contract agreed upon by the parties, at a price set at the time of the contract. These contracts may be bought or sold to seek to protect the Fund against a possible loss resulting from an adverse change in the relationship between foreign currencies and the U.S. dollar or to increase exposure

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to a particular foreign currency. Although forwards are intended to minimize the risk of loss due to a decline in the value of the hedged currencies, at the same time, they tend to limit any potential gain which might result should the value of such currencies increase. The Fund might be expected to enter into such contracts under, among others, the following circumstances:

Lock In. When PIMCO desires to lock in the U.S. dollar price on the purchase or sale of a security denominated in a foreign currency.

Cross Hedge. If a particular currency is expected to decrease against another currency, the Fund may sell the currency expected to decrease and purchase a currency that is expected to increase against the currency sold in an amount approximately equal to some or all of the Fund’s portfolio holdings denominated in the currency sold.

Direct Hedge. If PIMCO wants to try to eliminate substantially all of the risk of owning a particular currency, and/or if PIMCO believes that the Fund can benefit from price appreciation in a given country’s debt obligations but does not want to hold the currency, it may employ a direct hedge back into the U.S. dollar. In either case, the Fund might enter into a forward contract to sell the currency in which a portfolio security is denominated and purchase U.S. dollars at an exchange rate established at the time it initiated a contract. The cost of the direct hedge transaction may offset most, if not all, of the yield advantage offered by the non-U.S. security, but the Fund would hope to benefit from an increase (if any) in the value of the debt obligation.

Proxy Hedge. PIMCO might choose to use a proxy hedge, which may be less costly than a direct hedge. In this case, the Fund, having purchased a security, will sell a currency whose value is believed to be closely linked to the currency in which the security is denominated. Interest rates prevailing in the country whose currency was sold would be expected to be closer to those in the United States and lower than those of securities denominated in the currency of the original holding. This type of hedging entails greater risk than a direct hedge because it is dependent on a stable relationship between the two currencies paired as proxies and the relationships can be very unstable at times.

Costs of Hedging. When the Fund purchases a non-U.S. bond with a higher interest rate than is available on U.S. bonds of a similar maturity, the additional yield on the non-U.S. bond could be substantially reduced or lost if the Fund were to enter into a direct hedge by selling the foreign currency and purchasing the U.S. dollar. This is what is known as the “cost” of hedging. Proxy hedging attempts to reduce this cost through an indirect hedge back to the U.S. dollar.

It is important to note that hedging costs are treated as capital transactions and are not, therefore, deducted from the Fund’s dividend distribution and are not reflected in its yield. Instead such costs will, over time, be reflected in the Fund’s net asset value per share.

The Fund may enter into foreign currency transactions as a substitute for cash investments and for other investment purposes not involving hedging, including, without limitation, to exchange payments received in a foreign currency into U.S. dollars or in anticipation of settling a transaction that requires the Fund to deliver a foreign currency.

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The forecasting of currency market movement is extremely difficult, and whether any hedging strategy will be successful is highly uncertain. Moreover, it is impossible to forecast with precision the market value of portfolio securities at the expiration of a foreign currency forward contract. Accordingly, the Fund may be required to buy or sell additional currency on the spot market (and bear the expense of such transaction) if PIMCO’s predictions regarding the movement of foreign currency or securities markets prove inaccurate. In addition, the use of cross-hedging transactions may involve special risks, and may leave the Fund in a less advantageous position than if such a hedge had not been established. Because foreign currency forward contracts are privately negotiated transactions, there can be no assurance that the Fund will have flexibility to roll-over a foreign currency forward contract upon its expiration if it desires to do so. Additionally, there can be no assurance that the other party to the contract will perform its services thereunder.

The Fund may hold a portion of its assets in bank deposits denominated in foreign currencies, so as to facilitate investment in foreign securities as well as to protect against currency fluctuations and the need to convert such assets into U.S. dollars (thereby also reducing transaction costs). To the extent these monies are converted back into U.S. dollars, the value of the assets so maintained will be affected favorably or unfavorably by changes in foreign currency exchange rates and exchange control regulations.

Tax Consequences of Hedging. Income earned by the Fund from its foreign currency hedging activities, if any, may give rise to ordinary income that, to the extent there is no offset by losses from such activities, will be distributed to shareholders and taxable at ordinary income rates. In addition, under applicable tax law, the Fund’s foreign currency hedging activities may result in the application of, among other rules, the mark-to-market and straddle provisions of the Internal Revenue Code of 1986, as amended (the “Code”). These provisions could affect the amount, timing and/or character of distributions to Fund shareholders. See “Tax Matters.”

Among the risks of utilizing foreign currencies and related transactions is the risk that the relative value of currencies will be different than anticipated by PIMCO. The Fund may segregate liquid assets to cover forward currency contracts entered into for non-hedging purposes. If the Fund does not segregate liquid assets in such manner, then the Fund’s foreign currency contracts will be considered senior securities representing indebtedness for purposes of the 1940 Act.

Foreign Currency Exchange-Related Securities

Foreign Currency Warrants. Foreign currency warrants, such as Currency Exchange Warrants ^SM , are warrants that entitle their holders to receive from their issuer an amount of cash (generally, for warrants issued in the United States, in U.S. dollars) that is calculated pursuant to a predetermined formula and based on the exchange rate between a specified foreign currency and the U.S. dollar as of the exercise date of the warrant. Foreign currency warrants generally are exercisable upon their issuance and expire as of a specific date and time. Foreign currency warrants have been issued in connection with U.S. dollar-denominated debt offerings by major issuers in an attempt to reduce the foreign currency exchange risk that, from the point of view of

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the prospective purchasers of the securities, is inherent in the international debt obligation marketplace. Foreign currency warrants may attempt to reduce the foreign exchange risk assumed by purchasers of a security by, for example, providing for a supplement payment in the event that the U.S. dollar depreciates against the value of a major foreign currency such as the Japanese yen. The formula used to determine the amount payable upon exercise of a foreign currency warrant may make the warrant worthless unless the applicable foreign currency exchange rate moves in a particular direction ( e.g. , unless the U.S. dollar appreciates or depreciates against the particular foreign currency to which the warrant is linked or indexed). Foreign currency warrants are severable from the debt obligations with which they may be offered, and may be listed on exchanges. Foreign currency warrants may be exercisable only in certain minimum amounts, and an investor wishing to exercise warrants who possesses less than the minimum number required for exercise may be required either to sell the warrants or to purchase additional warrants, thereby incurring additional transaction costs. In the case of any exercise of warrants, there may be a time delay between the time a holder of warrants gives instructions to exercise and the time the exchange rate relating to exercise is determined, during which time the exchange rate could change significantly, thereby affecting both the market and cash settlement values of the warrants being exercised. The expiration date of the warrants may be accelerated if the warrants should be delisted from an exchange or if their trading should be suspended permanently, which would result in the loss of any remaining “time value” of the warrants ( i.e. , the difference between the current market value and the exercise value of the warrants), and, if the warrants were “out-of-the-money,” in a total loss of the purchase price of the warrants. Warrants are generally unsecured obligations of their issuers and are not standardized foreign currency options issued by the Options Clearing Corporation (“OCC”). Unlike foreign currency options issued by the OCC, the terms of foreign exchange warrants generally will not be amended in the event of government or regulatory actions affecting exchange rates or in the event of the imposition of other regulatory controls affecting the international currency markets. The initial public offering price of foreign currency warrants is generally considerably in excess of the price that a commercial user of foreign currencies might pay in the interbank market for a comparable option involving significantly larger amounts of foreign currencies. Foreign currency warrants are subject to significant foreign exchange risk, including risks arising from complex political or economic factors.

Principal Exchange Rate Linked Securities. Principal exchange rate linked securities (“PERLs ^SM ”) are debt obligations the principal on which is payable at maturity in an amount that may vary based on the exchange rate between the U.S. dollar and a particular foreign currency at or about that time. The return on “standard” principal exchange rate linked securities is enhanced if the foreign currency to which the security is linked appreciates against the U.S. dollar, and is adversely affected by increases in the foreign exchange value of the U.S. dollar; “reverse” principal exchange rate linked securities are like “standard” securities, except that their return is enhanced by increases in the value of the U.S. dollar and adversely impacted by increases in the value of foreign currency. Interest payments on the securities are generally made in U.S. dollars at rates that reflect the degree of foreign currency risk assumed or given up by the purchaser of the notes ( i.e. , at relatively higher interest rates if the purchaser has assumed some of the foreign exchange risk, or relatively lower interest rates if the issuer has assumed some of the foreign exchange risk, based on the expectations of the current market). PERLs may in limited cases be subject to acceleration of maturity (generally, not without the consent of the holders of the

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securities), which may have an adverse impact on the value of the principal payment to be made at maturity.

Performance Indexed Paper. Performance indexed paper is U.S. dollar-denominated commercial paper the yield of which is linked to certain foreign exchange rate movements. The yield to the investor on performance indexed paper is established at maturity as a function of spot exchange rates between the U.S. dollar and a designated currency as of or about that time (generally, the index maturity two days prior to maturity). The yield to the investor will be within a range stipulated at the time of purchase of the obligation, generally with a guaranteed minimum rate of return that is below, and a potential maximum rate of return that is above, market yields on U.S. dollar-denominated commercial paper, with both the minimum and maximum rates of return on the investment corresponding to the minimum and maximum values of the spot exchange rate two business days prior to maturity.

U.S. Government Securities

U.S. Government securities are obligations of and, in certain cases, guaranteed by, the U.S. Government, its agencies or instrumentalities. The U.S. Government does not guarantee the net asset value of the Fund’s shares. Some U.S. Government securities, such as Treasury bills, notes, and bonds, and mortgage-backed securities guaranteed by the GNMA, are supported by the full faith and credit of the United States; others, such as those of the Federal Home Loan Banks, are supported by the right of the issuer to borrow from the U.S. Treasury; others, such as those of FNMA, are supported by the discretionary authority of the U.S. Government to purchase the agency’s obligations; and still others, such as those of the Student Loan Marketing Association, are supported only by the credit of the instrumentality. U.S. Government securities may include zero coupon securities, which do not distribute interest on a current basis and tend to be subject to greater risk than interest-paying securities of similar maturities. Although U.S. Government-sponsored enterprises (“GSEs”), such as the Federal Home Loan Banks, FHLMC, FNMA and the Student Loan Marketing Association, may be chartered or sponsored by Congress, they are not funded by Congressional appropriations, and their securities are not issued by the U.S. Treasury or supported by the full faith and credit of the U.S. Government and involve increased credit risks. Although legislation has been enacted to support certain GSEs, including the Federal Home Loan Banks, FHLMC and FNMA, there is no assurance that GSE obligations will be satisfied in full, or that such obligations will not decrease in value or default. It is difficult, if not impossible, to predict the future political, regulatory or economic changes that could impact the GSEs and the values of their related securities or obligations. In addition, certain governmental entities have been subject to regulatory scrutiny regarding their accounting policies and practices and other concerns that may result in legislation, changes in regulatory oversight and/or other consequences that could adversely affect the credit quality, availability or investment character of securities issued or guaranteed by these entities.

U.S. Government securities include securities that have no coupons, or have been stripped of their unmatured interest coupons, individual interest coupons from such securities that trade separately, and evidences of receipt of such securities. Such securities may pay no cash income, and are purchased at a deep discount from their value at maturity. See “–Zero-Coupon Bonds, Step-Ups and Payment-In-Kind Securities.” Custodial receipts issued in connection with so-called trademark zero-coupon securities, such as CATs and TIGRs, are not issued by the U.S.

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Treasury, and are therefore not U.S. Government securities, although the underlying bond represented by such receipt is a debt obligation of the U.S. Treasury. Other zero-coupon Treasury securities ( e.g. , STRIPs and CUBEs) are direct obligations of the U.S. Government.

While some U.S. Government securities are guaranteed as to principal and interest, their market value is not guaranteed. U.S. Government securities are subject to the same interest rate and credit risks as are other debt securities. The U.S. Government does not guarantee the net asset value or market value of the Fund’s Common Shares. The U.S. Government’s ability to borrow money or otherwise finance its obligations, including as a result of legislatively-imposed limits on the amount of money it may borrow, could cause the values of U.S. Government securities, including those of the U.S. Government’s agencies and instrumentalities and other government-sponsored enterprises, to decline.

Municipal Bonds

The Fund may invest in municipal bonds which pay interest that, in the opinion of bond counsel to the issuer (or on the basis of other authority believed by PIMCO to be reliable), is exempt from federal income taxes (“municipal bonds”), although dividends that the Fund pays that are attributable to such interest will not be tax-exempt to shareholders of the Fund.

Municipal bonds share the attributes of debt/fixed-income securities in general, but are generally issued by states, municipalities and other political subdivisions, agencies, authorities and instrumentalities of states and multi-state agencies or authorities and may be either taxable or tax-exempt instruments. The municipal bonds that the Fund may purchase include general obligation bonds and limited obligation bonds (or revenue bonds), including industrial development bonds issued pursuant to former federal tax law. General obligation bonds are obligations involving the credit of an issuer possessing taxing power and are payable from such issuer’s general revenues and not from any particular source. Limited obligation bonds are payable only from the revenues derived from a particular facility or class of facilities or, in some cases, from the proceeds of a special excise or other specific revenue source. Tax-exempt private activity bonds and industrial development bonds generally are also revenue bonds and thus are not payable from the issuer’s general revenues. The credit and quality of private activity bonds and industrial development bonds are usually related to the credit of the user of the facilities. Payment of interest on and repayment of principal of such bonds is the responsibility of the user (and/or any guarantor).

Municipal bonds are subject to credit and market risk. Generally, prices of higher quality issues tend to fluctuate less with changes in market interest rates than prices of lower quality issues and prices of longer maturity issues tend to fluctuate more than prices of shorter maturity issues. Prices and yields on municipal bonds are dependent on a variety of factors, including general money-market conditions, the financial condition of the issuer, general conditions of the municipal bond market, the size of a particular offering, the maturity of the obligation and the rating of the issue. A number of these factors, including the ratings of particular issues, are subject to change from time to time. Information about the financial condition of an issuer of municipal bonds may not be as extensive as that which is made available by corporations whose securities are publicly traded. Obligations of issuers of municipal bonds are subject to the provisions of bankruptcy, insolvency and other laws, such as the Federal Bankruptcy Reform Act

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of 1978, affecting the rights and remedies of creditors. Congress or state legislatures may seek to extend the time for payment of principal or interest, or both, or to impose other constraints upon enforcement of such obligations. There is also the possibility that as a result of litigation or other conditions, the power or ability of issuers to meet their obligations for the payment of interest and principal on their municipal bonds may be materially affected or their obligations may be found to be invalid or unenforceable.

The Fund may also invest in residual interest municipal bonds (“RIBS”) whose interest rates bear an inverse relationship to the interest rate on another security or the value of an index. RIBS are created by dividing the income stream provided by the underlying bonds to create two securities, one short-term and one long-term. The interest rate on the short-term component is reset by an index or auction process normally every seven to 35 days. After income is paid on the short-term securities at current rates, the residual income from the underlying bond(s) goes to the long-term securities. Therefore, rising short-term interest rates result in lower income for the longer-term portion, and vice versa. The longer-term bonds can be very volatile and may be less liquid than other municipal bonds of comparable maturity. An investment in RIBS typically will involve greater risk than an investment in a fixed rate bond. Because increases in the interest rate on the other security or index reduce the residual interest paid on a RIB, the value of a RIB is generally more volatile than that of a fixed rate bond. RIBS have interest rate adjustment formulas that generally reduce or, in the extreme, eliminate the interest paid to the Fund when short-term interest rates rise, and increase the interest paid to the Fund when short-term interest rates fall. RIBS have varying degrees of liquidity that approximate the liquidity of the underlying bond(s), and the market price for these securities is volatile. These securities generally will underperform the market of fixed rate bonds in a rising interest rate environment, but tend to outperform the market of fixed rate bonds when interest rates decline or remain relatively stable. Although volatile, RIBS typically offer the potential for yields exceeding the yields available on fixed rate bonds with comparable credit quality, coupon, call provisions and maturity. The Fund may also invest in RIBS for the purpose of increasing the Fund’s leverage. Should short-term and long-term interest rates rise, the combination of the Fund’s investment in RIBS and its use of other forms of leverage (including the use of various derivative instruments) likely will adversely affect the Fund’s net asset value per share and income, distributions and total returns to shareholders. Trusts in which RIBS may be held could be terminated, in which case the residual bond holder would take possession of the underlying bond(s) on an unleveraged basis.

The Fund may invest in Build America Bonds, which are taxable municipal bonds with federal subsidies for a portion of the issuer’s borrowing costs. Build America Bonds were issued through the Build America Bond program, which was created as part of the American Recovery and Reinvestment Act of 2009. The objective of the program was to reduce the borrowing costs of state and local governments. Pursuant to the Act, issuers could elect to receive the federal subsidies on Build America Bonds in one of two forms: (i) in the form of direct payments from the U.S. Treasury and the Internal Revenue Service (“IRS”) to the issuer over the life of the bond in an amount generally equal to 35% (or 45% in the case of Recovery Zone Economic Development Bonds) of the total coupon interest payable by the issuer to its bondholders (“direct pay” Build America Bonds) or (ii) in the form of a federal tax credit, which is passed along directly to bondholders, generally in an amount equal to 35% of the total coupon interest payable by the issuer to the bondholders (“tax credit Build America Bonds”).

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The interest the Fund receives from its investments in either type of Build America Bonds is included in a Fund’s taxable income and distributed to shareholders as taxable ordinary income. For any tax credit Build America Bond held by the Fund, the Fund may elect to pass through to its shareholders any tax credits from those bonds that otherwise would be allowed to the Fund. These tax credits can generally be used to offset U.S. federal income taxes and the federal alternative minimum tax, but such credits are generally not refundable. Any unused credits may be carried forward to succeeding taxable years.

Issuance of Build America Bonds ceased on December 31, 2010. Although the Build America Bond program was not extended, the Build America Bonds outstanding and issued before such date will continue to be eligible for the federal interest rate subsidy, which continues for the life of the Build America Bonds; however, no bonds issued following the expiration of the Build America Bond program will be eligible for the federal tax subsidies (either in the form of direct payments to the issuers or as federal tax credits passed along to bondholders). As of the date of this Statement of Additional Information, there is no indication that Congress will renew the program to permit issuance of new Build America Bonds.

Corporate Debt Securities

The Fund may invest in a variety of bonds and related debt obligations of varying maturities issued by U.S. and non-U.S. corporations, banks and other business entities. Bonds include bills, notes, debentures, money market instruments and similar instruments and securities, and are generally used by corporations and other issuers to borrow money from investors for such purposes as working capital or capital expenditures. The issuer pays the investor a variable or fixed rate of interest and normally must repay the amount borrowed on or before maturity. Certain bonds are “perpetual” in that they have no maturity date.

The Fund’s investments in bonds are often subject to a number of risks described in the Prospectus and/or elaborated upon elsewhere in this section of the Statement of Additional Information, including credit risk, high yield risk, interest rate risk, issuer risk, foreign (non-U.S.) investment risk, inflation/deflation risk, liquidity risk, smaller company risk and management risk.

Commercial Paper

Commercial paper represents short-term unsecured promissory notes issued in bearer form by corporations such as banks or bank holding companies and finance companies. The Fund may invest in commercial paper of any credit quality consistent with the Fund’s investment objectives and policies, including unrated commercial paper for which PIMCO has made a credit quality assessment. See Appendix A to the Prospectus for a description of the ratings assigned by Moody’s, S&P and Fitch Ratings to commercial paper. The rate of return on commercial paper may be linked or indexed to the level of exchange rates between the U.S. dollar and a foreign currency or currencies.

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Convertible Securities and Synthetic Convertible Securities

A convertible security is a bond, debenture, note, preferred stock, or other security that entitles the holder to acquire common stock or other equity securities of the same or a different issuer. A convertible security generally entitles the holder to receive interest paid or accrued until the convertible security matures or is redeemed, converted or exchanged. Before conversion, convertible securities have characteristics similar to non-convertible debt or preferred securities, as applicable. The Fund will not normally invest more than 10% of its total assets in convertible debt securities, including synthetic convertible debt securities ( i.e. , instruments created through a combination of separate securities that possess the two principal characteristics of a traditional convertible security, i.e. , an income-producing security (“income-producing component”) and the right to acquire an equity security (“convertible component”)).

Convertible securities rank senior to common stock in a corporation’s capital structure and, therefore, generally entail less risk than the corporation’s common stock, although the extent to which such risk is reduced depends in large measure upon the degree to which the convertible security sells above its value as a fixed income security. Convertible securities are subordinate in rank to any senior debt obligations of the issuer, and, therefore, an issuer’s convertible securities entail more risk than its debt obligations. Convertible securities generally offer lower interest or dividend yields than non-convertible debt securities of similar credit quality because of the potential for capital appreciation. In addition, convertible securities are often lower-rated securities.

Because of the conversion feature, the price of the convertible security will normally fluctuate in some proportion to changes in the price of the underlying asset, and as such is subject to risks relating to the activities of the issuer and/or general market and economic conditions. The income component of a convertible security may tend to cushion the security against declines in the price of the underlying asset. However, the income component of convertible securities causes fluctuations based upon changes in interest rates and the credit quality of the issuer.

If the convertible security’s “conversion value,” which is the market value of the underlying common stock that would be obtained upon the conversion of the convertible security, is substantially below the “investment value,” which is the value of a convertible security viewed without regard to its conversion feature ( i.e. , strictly on the basis of its yield), the price of the convertible security is governed principally by its investment value. If the conversion value of a convertible security increases to a point that approximates or exceeds its investment value, the value of the security will be principally influenced by its conversion value. A convertible security will sell at a premium over its conversion value to the extent investors place value on the right to acquire the underlying common stock while holding an income-producing security.

A convertible security may be subject to redemption at the option of the issuer at a predetermined price. If a convertible security held by the Fund is called for redemption, the Fund would be required to permit the issuer to redeem the security and convert it to underlying common stock, or would sell the convertible security to a third party, which may have an adverse effect on the Fund’s ability to achieve its investment objectives.

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A third party or PIMCO also may create a “synthetic” convertible security by combining separate securities that possess the two principal characteristics of a traditional convertible security, i.e. , an income producing component and a convertible component. The income-producing component is achieved by investing in non-convertible, income-producing securities such as bonds, preferred stocks and money market instruments, which may be represented by derivative instruments. The convertible component is achieved by investing in securities or instruments such as warrants or options to buy common stock at a certain exercise price, or options on a stock index. Unlike a traditional convertible security, which is a single security having a single market value, a synthetic convertible comprises two or more separate securities, each with its own market value.

Therefore, the “market value” of a synthetic convertible security is the sum of the values of its income-producing component and its convertible component. For this reason, the values of a synthetic convertible security and a traditional convertible security may respond differently to market fluctuations.

More flexibility is possible in the assembly of a synthetic convertible security than in the purchase of a convertible security. Although synthetic convertible securities may be selected where the two components are issued by a single issuer, thus making the synthetic convertible security similar to the traditional convertible security, the character of a synthetic convertible security allows the combination of components representing distinct issuers, when PIMCO believes that such a combination may better achieve the Fund’s investment objectives. A synthetic convertible security also is a more flexible investment in that its two components may be purchased separately. For example, the Fund may purchase a warrant for inclusion in a synthetic convertible security but temporarily hold short-term investments while postponing the purchase of a corresponding bond pending development of more favorable market conditions.

A holder of a synthetic convertible security faces the risk of a decline in the price of the security or the level of the index involved in the convertible component, causing a decline in the value of the security or instrument, such as a call option or warrant, purchased to create the synthetic convertible security. Should the price of the stock fall below the exercise price and remain there throughout the exercise period, the entire amount paid for the call option or warrant would be lost.

Because a synthetic convertible security includes the income-producing component as well, the holder of a synthetic convertible security also faces the risk that interest rates will rise, causing a decline in the value of the income-producing instrument.

The Fund also may purchase synthetic convertible securities created by other parties, including convertible structured notes. Convertible structured notes are income-producing debentures linked to equity, and are typically issued by investment banks. Convertible structured notes have the attributes of a convertible security; however, the investment bank that issues the convertible note, rather than the issuer of the underlying common stock into which the note is convertible, assumes credit risk associated with the underlying investment, and the Fund in turn assumes credit risk associated with the convertible note.

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Preferred Stock

Preferred stock represents an equity interest in a company that generally entitles the holder to receive, in preference to the holders of other stocks such as common stocks, dividends and a fixed share of the proceeds resulting from a liquidation of the company. Some preferred stocks also entitle their holders to receive additional liquidation proceeds on the same basis as holders of a company’s common stock, and thus also represent an ownership interest in that company. The Fund may invest in preferred stocks that pay variable or fixed rates of return. The value of a company’s preferred stock may fall as a result of factors relating directly to that company’s products or services. A preferred stock’s value may also fall because of factors affecting not just the company, but companies in the same industry or in a number of different industries, such as increases in production costs. The value of preferred stock may also be affected by changes in financial markets that are relatively unrelated to the company or its industry, such as changes in interest rates or currency exchange rates. In addition, a company’s preferred stock generally pays dividends only after the company makes required payments to holders of its bonds and other debt. For this reason, the value of the preferred stock will usually react more strongly than bonds and other debt to actual or perceived changes in the company’s financial condition or prospects. Preferred stocks of smaller companies may be more vulnerable to adverse developments than those of larger companies.

Adjustable Rate and Auction Preferred Stocks. Typically, the dividend rate on an adjustable rate preferred stock is determined prospectively each quarter by applying an adjustment formula established at the time of issuance of the stock. Although adjustment formulas vary among issues, they typically involve a fixed premium or discount relative to rates on specified debt securities issued by the U.S. Treasury. The premium or discount adjustment to be added to or subtracted from this highest U.S. Treasury base rate yield is fixed at the time of issue and cannot be changed without the approval of the holders of the stock. The dividend rate on certain other preferred stocks in which the Fund may invest, commonly known as auction preferred stocks, is adjusted at intervals that may be more frequent than quarterly, such as every 49 days, based on bids submitted by holders and prospective purchasers of such stocks and may be subject to stated maximum and minimum dividend rates. The issues of most adjustable rate and auction preferred stocks currently outstanding are perpetual, but may be redeemable after a specified date at the option of the issuer. Certain issues supported by the credit of a high-rated financial institution provide for mandatory redemption prior to expiration of the credit arrangement. No redemption can occur if full cumulative dividends are not paid. Although the dividend rates on adjustable and auction preferred stocks are generally adjusted or reset frequently, the market values of these preferred stocks may still fluctuate in response to changes in interest rates. Market values of adjustable preferred stocks also may substantially fluctuate if interest rates increase or decrease once the maximum or minimum dividend rate for a particular stock is approached. Auctions for U.S. auction preferred stocks have failed since early 2008, and the dividend rates payable on such preferred shares since that time typically have been paid at their maximum applicable rate (typically a function of a reference rate of interest). The Fund expects that auction preferred stocks will continue to pay dividends at their maximum applicable rate for the foreseeable future and cannot predict whether or when the auction markets for auction preferred stocks may resume normal functioning.

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Fixed Rate Preferred Stocks. Some fixed rate preferred stocks in which the Fund may invest, known as perpetual preferred stocks, offer a fixed return with no maturity date. Because they never mature, perpetual preferred stocks act like long-term bonds, can be more volatile than other types of preferred stocks that have a maturity date and may have heightened sensitivity to changes in interest rates. The Fund may also invest in sinking fund preferred stocks. These preferred stocks also offer a fixed return, but have a maturity date and are retired or redeemed on a predetermined schedule. The shorter duration of sinking fund preferred stocks makes them perform somewhat like intermediate-term bonds and they typically have lower yields than perpetual preferred stocks.

Bank Capital Securities and Obligations

The Fund may invest in bank capital securities of both non-U.S. (foreign) and U.S. issuers. Bank capital securities are issued by banks to help fulfill their regulatory capital requirements. There are three common types of bank capital: Lower Tier II, Upper Tier II and Tier I. Upper Tier II securities are commonly thought of as hybrids of debt and preferred stock. Upper Tier II securities are often perpetual (with no maturity date), callable and have a cumulative interest deferral feature. This means that under certain conditions, the issuer bank can withhold payment of interest until a later date. However, such deferred interest payments generally earn interest. Tier I securities often take the form of trust preferred securities.

The Fund may also invest in other bank obligations including without limitation certificates of deposit, bankers’ acceptances and fixed time deposits. Certificates of deposit are negotiable certificates that are issued against funds deposited in a commercial bank for a definite period of time and that earn a specified return. Bankers’ acceptances are negotiable drafts or bills of exchange, normally drawn by an importer or exporter to pay for specific merchandise, which are “accepted” by a bank, meaning, in effect, that the bank unconditionally agrees to pay the face value of the instrument on maturity. Fixed time deposits are bank obligations payable at a stated maturity date and bearing interest at a fixed rate. Fixed time deposits may be withdrawn on demand by the investor, but may be subject to early withdrawal penalties which vary depending upon market conditions and the remaining maturity of the obligation. There are generally no contractual restrictions on the right to transfer a beneficial interest in a fixed time deposit to a third party, although there is generally no market for such deposits. The Fund may also hold funds on deposit with its custodian bank in an interest-bearing account for temporary purposes.

Bank Loans

The Fund may normally invest up to 40% of its total assets in bank loans, which include fixed-and floating-rate loans issued by banks (including, among others, interests in senior floating rate loans made to or issued by U.S. or non-U.S. banks or other corporations (“Senior Loans”), delayed funding loans and revolving credit facilities). Bank loans may also take the form of direct interests acquired during a primary distribution or the form of assignments of, novations of or participations in a bank loan acquired in secondary markets. The Fund may also gain exposure to bank loans and related investments through the use of total return swaps and/or other derivative instruments.

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Senior Loans include floating rate loans and institutionally traded floating rate debt obligations issued by asset-backed pools and other issues, and interests therein. Loan interests may be acquired from U.S. or non-U.S. commercial banks, insurance companies, finance companies or other financial institutions who have made loans or are members of a lending syndicate or from other holders of loan interests.

Senior Loans typically pay interest at rates which are re-determined periodically on the basis of a floating base lending rate (such as the London Inter-Bank Offered Rate, “LIBOR”) plus a premium. Senior Loans are typically of below investment grade quality. Senior Loans generally may hold a senior position in the capital structure of a borrower and are often secured with collateral. A Senior Loan is typically originated, negotiated and structured by a U.S. or non-U.S. commercial bank, insurance company, finance company or other financial institution (the “Agent”) for a lending syndicate of financial institutions (“Lenders”). The Agent typically administers and enforces the Senior Loan on behalf of the other Lenders in the syndicate. In addition, an institution, typically but not always the Agent, holds any collateral on behalf of the Lenders.

The Fund may purchase or gain economic exposure to assignments and participations in commercial loans, as well as debtor-in-possession loans. Such indebtedness may be secured or unsecured. Loan participations typically represent direct participations in a loan to a corporate borrower, and generally are offered by banks or other financial institutions or lending syndicates. The Fund may participate in such syndications, or can buy part of a loan, becoming a part lender. When purchasing or gaining economic exposure to loan participations, the Fund assumes the credit risk associated with the corporate or other borrower and may assume the credit risk associated with an interposed bank or other financial intermediary. The participation interests in which the Fund may invest may not be rated by any nationally recognized rating service.

Unless, under the terms of the loan or other indebtedness (such as may be the case in an assignment), the Fund has direct recourse against the borrower, the Fund may have to rely on the Agent or other financial intermediary to apply appropriate credit remedies against a borrower.

Purchasers of Senior Loans and other forms of direct indebtedness depend primarily upon the creditworthiness of the corporate or other borrower for payment of principal and interest. If the Fund does not receive scheduled interest or principal payments on such indebtedness, the Fund’s share price and yield could be adversely affected. Senior Loans that are fully secured may offer the Fund more protection than an unsecured loan in the event of non-payment of scheduled interest or principal. However, there is no assurance that the liquidation of any collateral from a secured Senior Loan would satisfy the borrower’s obligation, or that such collateral could be liquidated.

The Fund may invest in loan participations with credit quality comparable to that of many issuers of its other debt securities investments. Indebtedness of companies whose creditworthiness is poor involves substantially greater risks, and may be highly speculative.

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Some companies may never pay off their indebtedness, or may pay only a small fraction of the amount owed. Consequently, when investing in indebtedness of companies with poor credit, the Fund bears a substantial risk of losing the entire amount invested.

Loans and other types of direct indebtedness may not be readily marketable and may be subject to restrictions on resale. In some cases, negotiations involved in disposing of indebtedness may require weeks to complete. Consequently, some indebtedness may be difficult or impossible to dispose of readily at what PIMCO believes to be a fair price. In addition, valuation of illiquid indebtedness involves a greater degree of judgment in determining the Fund’s net asset value than if that value were based on available market quotations. At the same time, many loan interests are actively traded among certain financial institutions and considered to be liquid. PIMCO will determine the liquidity of the Fund’s investments by reference to market conditions and contractual provisions. Investments in loan participations are considered to be debt obligations for purposes of the Fund’s investment restriction relating to the lending of funds or assets.

Investments in loans through a direct assignment of the financial institution’s interests with respect to the loan may involve additional risks to the Fund. For example, if a loan is foreclosed, the Fund could become part owner of any collateral, and would bear the costs and liabilities associated with owning and disposing of the collateral. In addition, it is conceivable that, under emerging legal theories of lender liability, the Fund could be held liable as co-lender. It is unclear whether loans and other forms of direct indebtedness offer securities law protections against fraud and misrepresentation.

Economic exposure to loan interests through the use of derivative transactions, including, among others, total return swaps, generally involves greater risks than if the Fund had invested in the loan interest directly during a primary distribution or through assignments of, novations of or participations in a bank loan acquired in secondary markets since, in addition to the risks described above, certain derivative transactions may be subject to greater illiquidity risk and counterparty risk. See “—Derivative Instruments” for more information on these and related risks.

From time to time, PIMCO and its affiliates may borrow money from various banks in connection with their business activities. Such banks may also sell Senior Loans to or acquire them from the Fund or may be intermediate participants with respect to Senior Loans in which the Fund owns interests. Such banks may also act as Agents for Senior Loans held by the Fund.

Lending Fees. In the process of buying, selling and holding Senior Loans, the Fund may receive and/or pay certain fees. These fees are in addition to interest payments received and may include facility fees, commitment fees, commissions and prepayment penalty fees. When the Fund buys a Senior Loan it may receive a facility fee and when it sells a Senior Loan it may pay a facility fee. On an ongoing basis, the Fund may receive a commitment fee based on the undrawn portion of the underlying line of credit portion of the Senior Loan. In certain circumstances, the Fund may receive a prepayment penalty fee upon the prepayment of a Senior Loan by a borrower. Other fees received by the Fund may include covenant waiver fees and covenant modification fees.

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Borrower Covenants. A borrower under a Senior Loan typically must comply with various restrictive covenants contained in a loan agreement or note purchase agreement between the borrower and the Lender or lending syndicate (the “Loan Agreement”). Such covenants, in addition to requiring the scheduled payment of interest and principal, may include restrictions on dividend payments and other distributions to stockholders, provisions requiring the borrower to maintain specific minimum financial ratios and limits on total debt. In addition, the Loan Agreement may contain a covenant requiring the borrower to prepay the Senior Loan with any free cash flow. Free cash flow is generally defined as net cash flow after scheduled debt service payments and permitted capital expenditures, and includes the proceeds from asset dispositions or sales of securities. A breach of a covenant which is not waived by the Agent, or by the lenders directly, as the case may be, is normally an event of acceleration; i.e. , the Agent, or the lenders directly, as the case may be, has the right to call the outstanding Senior Loan. The typical practice of an Agent or a Lender in relying exclusively or primarily on reports from the borrower may involve a risk of fraud by the borrower. In the case of a Senior Loan in the form of a participation, the agreement between the buyer and seller may limit the rights of the holder of a Senior Loan to vote on certain changes which may be made to the Loan Agreement, such as waiving a breach of a covenant. However, the holder of the participation will, in almost all cases, have the right to vote on certain fundamental issues such as changes in principal amount, payment dates and interest rate.

Administration of Loans. In a typical Senior Loan, the Agent administers the terms of the Loan Agreement. In such cases, the Agent is normally responsible for the collection of principal and interest payments from the borrower and the apportionment of these payments to the credit of all institutions which are parties to the Loan Agreement. The Fund will generally rely upon the Agent or an intermediate participant to receive and forward to the Fund its portion of the principal and interest payments on the Senior Loan. Furthermore, unless under the terms of a participation agreement the Fund has direct recourse against the borrower, the Fund will rely on the Agent and the other members of the lending syndicate to use appropriate credit remedies against the borrower. The Agent is typically responsible for monitoring compliance with covenants contained in the Loan Agreement based upon reports prepared by the borrower. The seller of the Senior Loan usually does, but is often not obligated to, notify holders of Senior Loans of any failures of compliance. The Agent may monitor the value of the collateral, if any, and if the value of such collateral declines, may accelerate the Senior Loan, may give the borrower an opportunity to provide additional collateral or may seek other protection for the benefit of the participants in the Senior Loan. The Agent is compensated by the borrower for providing these services under a Loan Agreement, and such compensation may include special fees paid upon structuring and funding the Senior Loan and other fees paid on a continuing basis. With respect to Senior Loans for which the Agent does not perform such administrative and enforcement functions, PIMCO will perform such tasks on behalf of the Fund, although a collateral bank will typically hold any collateral on behalf of the Fund and the other lenders pursuant to the applicable Loan Agreement.

A financial institution’s appointment as Agent may usually be terminated in the event that it fails to observe the requisite standard of care or becomes insolvent, enters Federal Deposit Insurance Corporation (“FDIC”) receivership, or, if not FDIC insured, enters into bankruptcy proceedings.

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A successor Agent would generally be appointed to replace the terminated Agent, and assets held by the Agent under the Loan Agreement should remain available to holders of Senior Loans. However, if assets held by the Agent for the benefit of the Fund were determined to be subject to the claims of the Agent’s general creditors, the Fund might incur certain costs and delays in realizing payment on a Senior Loan, or suffer a loss of principal and/or interest. In situations involving other intermediate participants similar risks may arise.

Prepayments. Senior Loans usually require, in addition to scheduled payments of interest and principal, the prepayment of the Senior Loan from free cash flow, as defined above. The degree to which borrowers prepay Senior Loans, whether as a contractual requirement or at their election, may be affected by general business conditions, the financial condition of the borrower and competitive conditions among lenders, among others. As such, prepayments cannot be predicted with accuracy. Upon a prepayment, either in part or in full, the actual outstanding debt on which the Fund derives interest income will be reduced. However, the Fund may receive both a prepayment penalty fee from the prepaying borrower and a facility fee upon the purchase of a new Senior Loan with the proceeds from the prepayment of the former.

Bridge Financings . The Fund may acquire interests in Senior Loans which are designed to provide temporary or “bridge” financing to a borrower pending the sale of identified assets or the arrangement of longer-term loans or the issuance and sale of debt obligations. The Fund may also invest in Senior Loans of borrowers who have obtained bridge loans from other parties. A borrower’s use of bridge loans involves a risk that the borrower may be unable to locate permanent financing to replace the bridge loan, which may impair the borrower’s perceived creditworthiness.

Secured Senior Loans. To the extent that the collateral, if any, securing a Senior Loan consists of the stock of the borrower’s subsidiaries or other affiliates, the Fund will be subject to the risk that this stock will decline in value. Such a decline, whether as a result of bankruptcy proceedings or otherwise, could cause the Senior Loan to be undercollateralized or unsecured. In most credit agreements there is no formal requirement to pledge additional collateral. In addition, the Fund may invest in Senior Loans guaranteed by, or fully secured by assets of, shareholders or owners, even if the Senior Loans are not otherwise collateralized by assets of the borrower. There may be temporary periods when the principal asset held by a borrower is the stock of a related company, which may not legally be pledged to secure a secured Senior Loan. On occasions when such stock cannot be pledged, the secured Senior Loan will be temporarily unsecured until the stock can be pledged or is exchanged for or replaced by other assets, which will be pledged as security for such Senior Loan. However, the borrower’s ability to dispose of such securities, other than in connection with such pledge or replacement, will be strictly limited for the protection of the holders of secured Senior Loans.

If a borrower becomes involved in bankruptcy proceedings, a court may invalidate the Fund’s security interest in any loan collateral or subordinate the Fund’s rights under a secured Senior Loan to the interests of the borrower’s unsecured creditors. Such action by a court could be based, for example, on a “fraudulent conveyance” claim to the effect that the borrower did not receive fair consideration for granting the security interest in the loan collateral to the Fund. For secured Senior Loans made in connection with a highly leveraged transaction, consideration for

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granting a security interest may be deemed inadequate if the proceeds of such loan were not received or retained by the borrower, but were instead paid to other persons, such as shareholders of the borrower, in an amount which left the borrower insolvent or without sufficient working capital. There are also other events, such as the failure to perfect a security interest due to faulty documentation or faulty official filings, which could lead to the invalidation of the Fund’s security interest in any loan collateral. If the Fund’s security interest in loan collateral is invalidated or a secured Senior Loan is subordinated to other debt of a borrower in bankruptcy or other proceedings, it is unlikely that the Fund would be able to recover the full amount of the principal and interest due on the secured Senior Loan.

The Fund may also invest in or gain economic exposure to Senior Loans that are not secured by collateral or otherwise.

Delayed Funding Loans and Revolving Credit Facilities

The Fund may enter into, or acquire participations in, delayed funding loans and revolving credit facilities. Delayed funding loans and revolving credit facilities are borrowing arrangements in which the lender agrees to make loans up to a maximum amount upon demand by the borrower during a specified term. A revolving credit facility differs from a delayed funding loan in that as the borrower repays the loan, an amount equal to the repayment may be borrowed again during the term of the revolving credit facility. Delayed funding loans and revolving credit facilities usually provide for floating or variable rates of interest. These commitments may have the effect of requiring the Fund to increase its investment in a company at a time when it might not otherwise be desirable to do so (including at a time when the company’s financial condition makes it unlikely that such amounts will be repaid).

The Fund may invest in delayed funding loans and revolving credit facilities with credit quality comparable to that of issuers of its securities investments. Delayed funding loans and revolving credit facilities may be subject to restrictions on transfer, and only limited opportunities may exist to resell such instruments. As a result, the Fund may be unable to sell such investments at an opportune time or may have to resell them at less than fair market value. Delayed funding loans and revolving credit facilities are considered to be debt obligations for the purposes of the Fund’s investment restriction relating to the lending of funds or assets by the Fund. Delayed funding loans and revolving credit facilities are subject to credit, interest rate and liquidity risks, among other risks.

Zero-Coupon Bonds, Step-Ups and Payment-In-Kind Securities

Zero-coupon securities are debt obligations that do not entitle the holder to any periodic payments of interest either for the entire life of the obligation or for an initial period after the issuance of the obligations. Like zero-coupon bonds, “step-up” bonds pay no interest initially but eventually begin to pay a coupon rate prior to maturity, which rate may increase at stated intervals during the life of the security. Payment-in-kind securities (“PIKs”) are debt obligations that pay “interest” in the form of other debt obligations instead of cash. Each of these instruments is normally issued and traded at a deep discount from face value. The amount of the discount varies depending on such factors as the time remaining until maturity of the

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securities, prevailing interest rates, the liquidity of the security and the perceived credit quality of the issuer. The market prices of zero-coupon bonds, step-ups and PIKs generally are more volatile than the market prices of debt instruments that pay interest currently and in cash and are likely to respond to changes in interest rates to a greater degree than do other types of securities having similar maturities and credit quality.

In order to satisfy a requirement for qualification as a “regulated investment company” under the Code, an investment company, such as the Fund, must distribute each year at least 90% of its net investment income, including the original issue discount accrued on zero-coupon bonds, step-ups and PIKs. Because the Fund will not, on a current basis, receive cash payments from the issuer of these securities in respect of any accrued original issue discount, in some years, the Fund may have to sell other portfolio holdings in order to obtain cash to satisfy the distribution requirements under the Code even though investment considerations might otherwise make it undesirable for the Fund to sell securities at such time. Under many market conditions, investments in zero-coupon bonds, step-ups and PIKs may be illiquid, making it difficult for the Fund to dispose of them or determine their current value.

Variable and Floating Rate Debt Instruments

The Fund may invest in floating rate debt instruments, including Senior Loans (described in more detail above). Floating rate debt instruments are instruments that pay interest at rates that adjust whenever a specified interest rate changes, float at a fixed margin above a generally recognized base lending rate and/or reset or are redetermined ( e.g. , pursuant to an auction) on specified dates (such as the last day of a month or calendar quarter). These floating rate debt instruments may include, in addition to Senior Loans, instruments such as catastrophe and other event-linked bonds, bank capital securities, unsecured bank loans, corporate bonds, money market instruments and certain types of mortgage-backed and other asset-backed securities. Due to their floating rate features, these instruments will generally pay higher levels of income in a rising interest rate environment and lower levels of income as interest rates decline. For the same reason, the market value of a floating rate debt instrument is generally expected to have less sensitivity to fluctuations in market interest rates than a fixed-rate debt instrument, although the value of a floating rate instrument may nonetheless decline as interest rates rise and due to other factors, such as changes in credit quality.

The Fund also may invest in inverse floating rate debt instruments (“inverse floaters”). The interest rate on an inverse floater resets in the opposite direction from the market rate of interest to which the inverse floater is indexed. An inverse floating rate security may exhibit greater price volatility than a fixed rate obligation of similar credit quality.

Inflation-Indexed Bonds

The Fund may invest in inflation-indexed bonds, which are debt obligations whose principal value is periodically adjusted according to the rate of inflation. Two structures are common. The U.S. Treasury and some other issuers utilize a structure that accrues inflation into the principal value of the bond. Many other issuers pay out the Consumer Price Index accruals as part of a semiannual coupon.

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Inflation-indexed bonds issued by the U.S. Treasury have maturities of approximately five, ten or thirty years, although it is possible that securities with other maturities will be issued in the future. The U.S. Treasury securities pay interest on a semi-annual basis equal to a fixed percentage of the inflation-adjusted principal amount. For example, if the Fund purchased an inflation-indexed bond with a par value of $1,000 and a 3% real rate of return coupon (payable 1.5% semi-annually), and the rate of inflation over the first six months was 1%, the mid-year par value of the bond would be $1,010 and the first semi-annual interest payment would be $15.15 ($1,010 times 1.5%). If inflation during the second half of the year resulted in the whole year’s inflation equaling 3%, the end-of-year par value of the bond would be $1,030 and the second semi-annual interest payment would be $15.45 ($1,030 times 1.5%).

If the periodic adjustment rate measuring inflation falls, the principal value of inflation-indexed bonds will be adjusted downward, and consequently the interest payable on these securities (calculated with respect to a smaller principal amount) will be reduced. Repayment of the original bond principal upon maturity (as adjusted for inflation) is guaranteed in the case of U.S. Treasury inflation-indexed bonds, even during a period of deflation. However, the current market value of the bonds is not guaranteed and will fluctuate. The Fund may also invest in other inflation-related bonds which may or may not provide a similar guarantee. If a guarantee of principal is not provided, the adjusted principal value of the bond repaid at maturity may be less than the original principal amount. With regard to municipal inflation-indexed bonds and certain corporate inflation-indexed bonds, the inflation adjustment is typically reflected in the semi-annual coupon payment. As a result, the principal value of municipal inflation-indexed bonds and such corporate inflation-indexed bonds does not adjust according to the rate of inflation.

The value of inflation-indexed bonds is expected to change in response to changes in real interest rates. Real interest rates in turn are tied to the relationship between nominal interest rates and the rate of inflation. Therefore, if the rate of inflation rises at a faster rate than nominal interest rates, real interest rates might decline, leading to an increase in value of inflation-indexed bonds. In contrast, if nominal interest rates increase at a faster rate than inflation, real interest rates might rise, leading to a decrease in value of inflation-indexed bonds.

While these securities may provide protection from long-term inflationary trends, short-term increases in inflation may lead to a decline in value. If interest rates rise due to reasons other than inflation (for example, due to changes in currency exchange rates), investors in these securities may not be protected to the extent that the increase is not reflected in the bond’s inflation measure.

The periodic adjustment of U.S. inflation-indexed bonds is tied to the Consumer Price Index for Urban Consumers (“CPI-U”), which is calculated monthly by the U.S. Bureau of Labor Statistics. The CPI-U is a measurement of changes in the cost of living, made up of components such as housing, food, transportation and energy. Inflation-indexed bonds issued by a non-U.S. government are generally adjusted to reflect a comparable inflation index calculated by that government. There can be no assurance that the CPI-U or any non-U.S. inflation index will accurately measure the real rate of inflation in the prices of goods and services. Moreover, there can be no assurance that the rate of inflation in a non-U.S. country will be correlated to the rate of inflation in the United States.

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Any increase in the principal amount of an inflation-indexed bond will be original issue discount which is taxable as ordinary income in the year accrued, even though investors do not receive their principal, including any increases thereto, until maturity. See “Tax Matters–Original Issue Discount and Payment-in-Kind Securities.”

Event-Linked Exposure

The Fund may obtain event-linked exposure by investing in “event-linked bonds” or “event-linked swaps,” or by implementing “event-linked strategies.” Event-linked exposure results in gains or losses that typically are contingent on the nonoccurrence of a specific “trigger” event, such as a hurricane, earthquake or other physical or weather-related phenomena. Some event-linked bonds are commonly referred to as “catastrophe bonds.” They may be issued by government agencies, insurance companies, reinsurers, special purpose corporations or other on-shore or off-shore entities (such special purpose entities are created to accomplish a narrow and well-defined objective, such as the issuance of a note in connection with a reinsurance transaction). If a trigger event causes losses exceeding a specific amount in the geographic region and time period specified in a bond, the Fund may lose a portion or all of its principal invested in the bond. If no trigger event occurs, the Fund will recover its principal plus interest. For some event-linked bonds, the trigger event or losses may be based on company-wide losses, index-portfolio losses, industry indices or readings of scientific instruments rather than specified actual losses. Often the event-linked bonds provide for extensions of maturity that are mandatory, or optional at the discretion of the issuer, in order to process and audit loss claims in those cases where a trigger event has, or possibly has, occurred. An extension of maturity may increase volatility. In addition to the specified trigger events, event-linked bonds also may expose the Fund to certain unanticipated risks including but not limited to issuer risk, credit risk, counterparty risk, adverse regulatory or jurisdictional interpretations and adverse tax consequences.

Event-linked bonds are a relatively new type of financial instrument. As such, there is no significant trading history for many of these bonds, and there can be no assurance that a liquid market in these bonds will develop. Lack of a liquid market may impose the risk of higher transaction costs and the possibility that the Fund may be forced to liquidate positions when it would not be advantageous to do so. Event-linked bonds are typically rated.

Derivative Instruments

The Fund may (but is not required to) use a variety of other derivative instruments (including both long and short positions) in an attempt to enhance the Fund’s investment returns, to hedge against market and other risks in the portfolio, to add leverage to the portfolio and/or to obtain market exposure with reduced transaction costs.

Generally, derivatives are financial contracts whose value depends upon, or is derived from, the value of an underlying asset, reference rate or index, and may relate to individual debt instruments, interest rates, currencies or currency exchange rates, commodities or related indexes. Examples of derivative instruments that the Fund may use include, but are not limited to, options contracts, futures contracts, options on futures contracts, swap agreements (including total return and credit default swaps) and short sales. The Fund also may engage in credit spread

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trades. A credit spread trade is an investment position relating to a difference in the prices or interest rates of two bonds or other securities, in which the value of the investment position is determined by changes in the difference between the prices or interest rates, as the case may be, of the respective securities. The Fund may also have exposure to derivatives, such as interest rate or credit-default swaps, through investment in credit-linked trust certificates and other securities issued by special purpose or structured vehicles. The Fund may also use derivatives to add leverage to the portfolio. If other types of financial instruments, including other types of options, futures contracts or futures options are traded in the future, the Fund may also use those instruments, provided that their use is consistent with the Fund’s investment objectives and policies.

Like the other investments of the Fund, the ability of the Fund to utilize derivative instruments successfully may depend in part upon the ability of PIMCO to assess the issuer’s credit characteristics and other macro-economic factors correctly. If PIMCO incorrectly forecasts such factors and has taken positions in derivative instruments contrary to prevailing market trends, the Fund could lose money.

The Fund might not employ any of the strategies described below, and no assurance can be given that any strategy used will succeed. If PIMCO incorrectly forecasts market values or other economic factors in utilizing a derivatives strategy for the Fund, the Fund might have been in a better position if it had not entered into the transaction at all. Also, suitable derivative transactions may not be available in all circumstances. The use of these strategies involves certain special risks, including a possible imperfect correlation, or even no correlation, between price movements of derivative instruments and price movements of related investments. While some strategies involving derivative instruments can reduce the risk of loss, they can also reduce the opportunity for gain or even result in losses by offsetting favorable price movements in related investments or otherwise, due to the possible inability of the Fund to purchase or sell a portfolio security at a time that otherwise would be favorable or the possible need to sell a portfolio security at a disadvantageous time because the Fund is required to maintain asset coverage or offsetting positions in connection with transactions in derivative instruments, and the possible inability of the Fund to close out or to liquidate its derivatives positions. In addition, the Fund’s use of such instruments may cause the Fund to realize higher amounts of short-term capital gains (generally taxed at ordinary income tax rates) than if it had not used such instruments; also, the requirements for qualification as a regulated investment company can limit the extent to which the Fund may enter into commodity-linked derivatives, such as commodity futures contracts discussed in more detail below. See “Tax Matters” below. The Fund may be subject to certain restrictions on its use of derivative strategies imposed by guidelines of one or more rating agencies that may issue ratings for any preferred shares issued by the Fund.

Options on Securities and Indexes. The Fund may purchase and sell put and call options on securities or indexes in standardized contracts traded on domestic or other securities exchanges, boards of trade, or similar entities, or quoted on NASDAQ or on an over-the-counter market, and agreements, sometimes called cash puts, which may accompany the purchase of a new issue of debt obligations from a dealer.

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An option on a security (or an index) is a contract that gives the holder of the option, in return for a premium, the right to buy from (in the case of a call) or sell to (in the case of a put) the writer of the option the security underlying the option (or the cash value of the index) at a specified exercise price at any time during the term of the option. The writer of an option on a security has the obligation upon exercise of the option to deliver the underlying security upon payment of the exercise price or to pay the exercise price upon delivery of the underlying security. Upon exercise, the writer of an option on an index is obligated to pay the difference between the cash value of the index and the exercise price multiplied by the specified multiplier for the index option. (An index is designed to reflect features of a particular financial or securities market, a specific group of financial instruments or securities, or certain economic indicators.)

The Fund may (but is not required to) “cover” its obligations when it writes call options or put options. In the case of a call option on a debt obligation or other security, the option is covered if the Fund owns the security underlying the call or has an absolute and immediate right to acquire that security without additional cash consideration (or, if additional cash consideration is required, cash or other assets determined to be liquid by PIMCO in accordance with procedures established by the Board of Trustees, in such amount are segregated by its custodian) upon conversion or exchange of other securities held by the Fund.

A call option on a security is also “covered” if the Fund does not hold the underlying security or have the right to acquire it, but the Fund segregates assets determined to be liquid by PIMCO in accordance with procedures established by the Board of Trustees in an amount equal to the contract value of the position (minus any collateral deposited with a broker-dealer), on a mark-to-market basis (a so-called “naked” call option).

For a call option on an index, the option is covered if the Fund maintains with its custodian liquid assets in an amount equal to the contract value of the index. A call option is also covered if the Fund holds a call on the same index or security as the call written where the exercise price of the call held is (i) equal to or less than the exercise price of the call written, or (ii) greater than the exercise price of the call written, provided the difference is maintained by the Fund in segregated liquid assets. A put option on a security or an index is covered if the Fund segregates liquid assets equal to the exercise price. A put option is also covered if the Fund holds a put on the same security or index as the put written where the exercise price of the put held is (i) equal to or greater than the exercise price of the put written, or (ii) less than the exercise price of the put written, provided the difference is maintained by the Fund in segregated liquid assets. Obligations under written call and put options so covered will not be construed to be “senior securities” for purposes of the Fund’s investment restrictions concerning senior securities and borrowings.

If an option written by the Fund expires unexercised, the Fund realizes on the expiration date a capital gain equal to the premium the Fund received at the time the option was written. If an option purchased by the Fund expires unexercised, the Fund realizes a capital loss equal to the premium paid. Prior to the earlier of exercise or expiration, an exchange-traded option may be closed out by an offsetting purchase or sale of an option of the same series (type, exchange, underlying security or index, exercise price and expiration). There can be no assurance, however, that a closing purchase or sale transaction can be effected when the Fund desires.

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The Fund may sell put or call options it has previously purchased, which could result in a net gain or loss depending on whether the amount realized on the sale is more or less than the premium and other transaction costs paid on the put or call option which is sold. Prior to exercise or expiration, an option may be closed out by an offsetting purchase or sale of an option of the same series. The Fund will realize a capital gain from a closing purchase transaction if the cost of the closing option is less than the premium received from writing the option, or, if it is more, the Fund will realize a capital loss. If the premium received from a closing sale transaction is more than the premium paid to purchase the option, the Fund will realize a capital gain or, if it is less, the Fund will realize a capital loss. The principal factors affecting the market value of a put or a call option include supply and demand, interest rates, the current market price of the underlying security or index in relation to the exercise price of the option, the volatility of the underlying security or index and the time remaining until the expiration date.

The premium paid for a put or call option purchased by the Fund is an asset of the Fund. The premium received for an option written by the Fund is recorded as a deferred credit. The value of an option purchased or written is marked to market daily and is valued at the closing price on the exchange on which it is traded or, if not traded on an exchange or no closing price is available, at the mean between the last bid and asked prices.

The Fund may write straddles (covered or uncovered) consisting of a combination of a call and a put written on the same underlying security. A straddle will be covered when sufficient assets are deposited to meet the Fund’s immediate obligations. The Fund may use the same liquid assets to cover both the call and put options where the exercise price of the call and put are the same, or the exercise price of the call is higher than that of the put. In such cases, the Fund will also segregate liquid assets equivalent to the amount, if any, by which the put is “in the money.”

Risks Associated with Options on Securities and Indexes. There are several risks associated with transactions in options on securities and on indexes. For example, there are significant differences between the securities and options markets that could result in an imperfect correlation between these markets, causing a given transaction not to achieve the intended result. A decision as to whether, when and how to use options involves the exercise of skill and judgment, and even a well-conceived transaction may be unsuccessful because of market behavior or unexpected events.

During the option period, the covered call writer has, in return for the premium on the option, given up the opportunity to profit from a price increase in the underlying security above the exercise price, but, as long as its obligation as a writer continues, has retained the risk of loss should the price of the underlying security decline. The writer of an option has no control over the time when it may be required to fulfill its obligation as a writer of the option. Once an option writer has received an exercise notice, it cannot effect a closing purchase transaction in order to terminate its obligation under the option and must deliver the underlying security at the exercise price. If a put or call option purchased by the Fund is not sold when it has remaining value, and if the market price of the underlying security remains equal to or greater than the exercise price (in the case of a put), or remains less than or equal to the exercise price (in the case of a call), the Fund will lose its entire investment in the option. Also, where a put or call option on a particular

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security is purchased to hedge against price movements in a related security, the price of the put or call option may move more or less than the price of the related security.

There can be no assurance that a liquid market will exist when the Fund seeks to close out an option position. If the Fund were unable to close out an option that it had purchased on a security or index, it would have to exercise the option in order to realize any profit or the option may expire worthless. If the Fund were unable to close out a call option that it had written on a security held in its portfolio, it would not be able to sell the underlying security unless the option expired without exercise. As the writer of a call option on an individual security held in its portfolio, the Fund forgoes, during the option’s life, the opportunity to profit from increases in the market value of the security or index position covering the call option above the sum of the premium and the exercise price of the call.

If trading were suspended in an option purchased by the Fund, the Fund would not be able to close out the option. If restrictions on exercise were imposed, the Fund might be unable to exercise an option it has purchased. Except to the extent that a call option on an index written by the Fund is covered by an option on the same index purchased by the Fund, movements in the index may result in a loss to the Fund; however, such losses may be mitigated by changes in the value of the Fund’s securities during the period the option was outstanding.

Foreign Currency Options. The Fund may buy or sell put and call options on foreign currencies for investment purposes or as a hedge against changes in the value of the U.S. dollar (or another currency) in relation to a foreign currency in which the Fund’s securities may be denominated. The Fund may buy or sell put and call options on foreign currencies either on exchanges or in the over-the-counter market. A put option on a foreign currency gives the purchaser of the option the right to sell a foreign currency at the exercise price on one or more exercise dates. A call option on a foreign currency gives the purchaser of the option the right to purchase the currency at the exercise price on one or more exercise dates. Currency options traded on U.S. or other exchanges may be subject to position limits which may limit the ability of the Fund to reduce foreign currency risk using such options.

Futures Contracts and Options on Futures Contracts. The Fund may invest in futures contracts and options thereon (“futures options”), including interest rates, securities indexes, debt obligations (to the extent they are available) and U.S. Government and agency securities, as well as purchase put and call options on such futures contracts.

Generally, a futures contract provides for the future sale by one party and purchase by another party of a specified quantity of the security or other financial instrument at a specified price and time. A futures contract on an index is an agreement pursuant to which two parties agree to take or make delivery of an amount of cash equal to the difference between the value of the index at the close of the last trading day of the contract and the price at which the index contract was originally written. Although the value of an index might be a function of the value of certain specified securities, physical delivery of these securities is not always made. A public market exists in futures contracts covering a number of indexes as well as financial instruments, including, without limitation: U.S. Treasury bonds; U.S. Treasury notes; GNMA Certificates; three-month U.S. Treasury bills; 90-day commercial paper; bank certificates of deposit;

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Eurodollar certificates of deposit; the Australian dollar; the Canadian dollar; the British pound; the Japanese yen; the Swiss franc; the Mexican peso; and certain multinational currencies, such as the euro. It is expected that other futures contracts will be developed and traded in the future.

The Fund may purchase and write call and put futures options. Futures options possess many of the same characteristics as options on securities and indexes (discussed above). A futures option gives the holder the right, in return for the premium paid, to assume a long position (call) or short position (put) in a futures contract at a specified exercise price on one or more exercise dates. Upon exercise of a call option, the holder acquires a long position in the futures contract and the writer is assigned the opposite short position. In the case of a put option, the opposite is true.

The Fund may enter into futures contracts and futures options that are standardized and traded on a U.S. or other exchange, board of trade, or similar entity, or quoted on an automated quotation system, and the Fund may also enter into OTC options on futures contracts.

When a purchase or sale of a futures contract is made by the Fund, the Fund is required to deposit with its custodian (or broker, if legally permitted) a specified amount of assets determined to be liquid by PIMCO in accordance with procedures established by the Board of Trustees (“initial margin”). The margin required for a futures contract is set by the exchange on which the contract is traded and may be modified during the term of the contract. Margin requirements on foreign exchanges may be different than on U.S. exchanges. The initial margin is in the nature of a performance bond or good faith deposit on the futures contract that is returned to the Fund upon termination of the contract, assuming all contractual obligations have been satisfied. The Fund expects to earn taxable interest income on its initial margin deposits. A futures contract held by the Fund is valued daily at the official settlement price of the exchange on which it is traded. Each day the Fund pays or receives cash, called “variation margin,” equal to the daily change in value of the futures contract. This process is known as “marking to market.” Variation margin does not represent a borrowing or loan by the Fund but is instead a settlement between the Fund and the broker of the amount one would owe the other if the futures contract expired. In computing daily net asset value, the Fund will mark to market its open futures positions.

The Fund is also required to deposit and to maintain margin with respect to put and call options on futures contracts written by it. Such margin deposits will vary depending on the nature of the underlying futures contract (and the related initial margin requirements), the current market value of the option, and other futures positions held by the Fund.

Although some futures contracts call for making or taking delivery of the underlying securities, generally these obligations are closed out prior to delivery by offsetting purchases or sales of matching futures contracts (involving the same exchange, underlying security or index, and delivery month). If an offsetting purchase price is less than the original sale price, the Fund realizes a capital gain, or if it is more, the Fund realizes a capital loss. Conversely, if an offsetting sale price is more than the original purchase price, the Fund realizes a capital gain, or if it is less, the Fund realizes a capital loss. The transaction costs must also be included in these calculations.

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The Fund may write straddles (covered or uncovered) consisting of a call and a put written on the same underlying futures contract. A straddle will be covered when sufficient assets are deposited to meet the Fund’s immediate obligations. The Fund may use the same liquid assets to cover both the call and put options where the exercise price of the call and put are the same, or the exercise price of the call is higher than that of the put. In such cases, the Fund will also segregate liquid assets equivalent to the amount, if any, by which the put is “in the money.”

The Fund is operated by a person who has claimed an exclusion from the definition of the term “commodity pool operator” under the Commodity Exchange Act (the “CEA”), and, therefore, such person is not subject to registration or regulation as a pool operator under the CEA.

The Fund has claimed an exclusion from the definition of the term “commodity pool operator” under the Commodity Exchange Act (“CEA”) pursuant to Rule 4.5 under the CEA promulgated by the U.S. Commodity Futures Trading Commission (“CFTC”). The Fund currently is not, therefore, subject to registration or regulation as a “commodity pool operator” under the CEA and the Fund intends to be operated so as not to be deemed to be a “commodity pool” under the regulations of the CFTC under current law. On February 9, 2012, the CFTC adopted amendments to its rules that, once effective, may affect the ability of the Fund to continue to claim this exclusion. The Fund would be limited in its ability to use futures or options on futures or engage in swaps transactions if it continued to claim the exclusion. If the Fund did not continue to claim the exclusion, the Fund believes that the Investment Manager and/or Sub-Adviser would likely become subject to registration and regulation as a commodity pool operator with respect to the fund. The Fund may incur additional expenses as a result of the CFTC’s registration and regulatory requirements. The impact of the rule changes on the operations of the Fund and the Investment Manager and/or Sub-Adviser is not fully known at this time. The Fund and the Investment Manager and/or Sub-Adviser are continuing to analyze the effect of these rule changes on the Fund.

Limitations on Use of Futures and Futures Options. When purchasing a futures contract, the Fund will maintain with its custodian (and mark-to-market on a daily basis) assets determined to be liquid by PIMCO in accordance with procedures established by the Board of Trustees that, when added to the amounts deposited with a futures commission merchant as margin, are equal to the market value of the futures contract. Alternatively, the Fund may “cover” its position by purchasing a put option on the same futures contract with a strike price as high as or higher than the price of the contract held by the Fund.

When selling a futures contract, the Fund will maintain with its custodian (and mark-to-market on a daily basis) assets determined to be liquid by PIMCO in accordance with procedures established by the Board of Trustees that are equal to the market value of the instruments underlying the contract. Alternatively, the Fund may “cover” its position by owning the instruments underlying the contract (or, in the case of an index futures contract, a portfolio with a volatility substantially similar to that of the index on which the futures contract is based), or by holding a call option permitting the Fund to purchase the same futures contract at a price no higher than the price of the contract written by the Fund (or at a higher price if the difference is maintained in liquid assets with the Fund’s custodian).

With respect to futures contracts that are not legally required to “cash settle,” the Fund may cover the open position by setting aside or “earmarking” liquid assets in an amount equal to the

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market value of the futures contract. With respect to futures that are required to “cash settle,” however, the Fund is permitted to set aside or “earmark” liquid assets in an amount equal to the Fund’s daily marked to market (net) obligation, if any, (in other words, the Fund’s daily net liability, if any) rather than the market value of the futures contract. By setting aside or “earmarking” assets equal to only its net obligation under cash-settled futures, the Fund will have the ability to utilize these contracts to a greater extent than if the Fund were required to segregate or “earmark” assets equal to the full market value of the futures contract.

When selling a call option on a futures contract, the Fund will maintain with its custodian (and mark-to-market on a daily basis) liquid assets that, when added to the amounts deposited with a futures commission merchant as margin, equal the total market value of the futures contract underlying the call option. Alternatively, the Fund may cover its position by entering into a long position in the same futures contract at a price no higher than the strike price of the call option, by owning the instruments underlying the futures contract, or by holding a separate call option permitting the Fund to purchase the same futures contract at a price not higher than the strike price of the call option sold by the Fund, or by taking other offsetting positions.

When selling a put option on a futures contract, the Fund will maintain with its custodian (and mark to market on a daily basis) a liquid assets that equal the purchase price of the futures contract, less any margin on deposit. Alternatively, the Fund may cover the position either by entering into a short position in the same futures contract, or by owning a separate put option permitting it to sell the same futures contract so long as the strike price of the purchased put option is the same as or higher than the strike price of the put option sold by the Fund, or by taking other offsetting positions.

To the extent that securities with maturities greater than one year are used to segregate liquid assets to cover the Fund’s obligations under futures contracts and related options, such use may tend to exaggerate the effect on net asset value of any increase or decrease in the market value of the Fund’s portfolio, and may require liquidation of portfolio positions when it is not advantageous to do so. If the Fund does not segregate liquid assets in such manner, then such securities will be considered senior securities representing indebtedness for purposes of the 1940 Act.

The requirements for qualification as a regulated investment company also may limit the extent to which the Fund may enter into futures, futures options or forward contracts. See “Tax Matters.”

The Fund’s self-imposed limit on leverage may also limit the extent to which the Fund may enter into futures contracts. See “Leverage and Borrowing” below.

Risks Associated with Futures and Futures Options. There are several risks associated with the use of futures contracts and futures options. A purchase or sale of a futures contract may result in losses in excess of the amount invested in the futures contract. In addition, there is a risk of loss by the Fund of margin deposits in the event of the bankruptcy of the custodian or broker with whom the Fund has an open position in an option or futures or forward contract. There can be no guarantee that there will be a correlation between price movements in futures used as a hedging

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vehicle and in the Fund securities being hedged. In addition, there are significant differences between the securities and futures markets that could result in an imperfect correlation between the markets, causing a given hedge not to achieve its objective. The degree of imperfection of correlation depends on circumstances such as variations in speculative market demand for futures and futures options on securities, including technical influences in futures trading and futures options, and differences between the financial instruments being hedged and the instruments underlying the standard contracts available for trading in such respects as interest rate levels, maturities, and creditworthiness of issuers. A decision as to whether, when and how to hedge involves the exercise of skill and judgment, and even a well-conceived hedge may be unsuccessful to some degree because of market behavior or unexpected interest rate trends.

Futures contracts on U.S. Government securities historically have reacted to an increase or decrease in interest rates in a manner similar to that in which the underlying U.S. Government securities reacted. To the extent, however, that the Fund enters into such futures contracts, the value of such futures may not vary in direct proportion to the value of the Fund’s holdings of debt obligations. Thus, the anticipated spread between the price of the futures contract and the hedged security may be distorted due to differences in the nature of the markets. The spread also may be distorted by differences in initial and variation margin requirements, the liquidity of such markets and the participation of speculators in such markets.

Futures exchanges may limit the amount of fluctuation permitted in certain futures contract prices during a single trading day. The daily limit establishes the maximum amount that the price of a futures contract may vary either up or down from the previous day’s settlement price at the end of the current trading session. Once the daily limit has been reached in a futures contract subject to the limit, no more trades may be made on that day at a price beyond that limit. The daily limit governs only price movements during a particular trading day and therefore does not limit potential losses because the limit may work to prevent the liquidation of unfavorable positions. For example, futures prices have occasionally moved to the daily limit for several consecutive trading days with little or no trading, thereby preventing prompt liquidation of positions and subjecting some holders of futures contracts to substantial losses.

There can be no assurance that a liquid market will exist at a time when the Fund seeks to close out a futures contract or a futures option position, and the Fund would remain obligated to meet margin requirements until the position is closed. As a result, there can be no assurance that an active secondary market will develop or continue to exist.

Additional Risks of Options on Securities, Futures Contracts, Options on Futures Contracts and Forward Currency Exchange Contracts and Options Thereon. Options on securities or indexes, futures contracts, options on futures contracts, and options on currencies may be traded on foreign exchanges. Such transactions may not be regulated as effectively as similar transactions in the United States, may not involve a clearing mechanism and related guarantees, and are subject to the risk of governmental actions affecting trading in, or the prices of, non-U.S. securities. Some foreign exchanges may be principal markets so that no common clearing facility exists and a trader may look only to the broker for performance of the contract. The value of such positions also could be adversely affected by (i) other complex non-U.S. political, legal and economic factors, (ii) lesser availability than in the United States of data on which to make

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