As filed with the U.S. Securities and Exchange Commission on December 14, 2012

1933 Act File No. 333-            

1940 Act File No. 811-06548

U.S. SECURITIES AND EXCHANGE COMMISSION

Washington, D.C. 20549

Form N-2

(Check appropriate box or boxes)

and/or

Nuveen Select Tax-Free Income Portfolio

(Exact name of Registrant as Specified in Charter)

333 West Wacker Drive, Chicago, Illinois 60606

(Address of Principal Executive Offices)

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

(Registrant’s Telephone Number, including Area Code): (800) 257-8787

Kevin J. McCarthy

Vice President and Secretary

333 West Wacker Drive

Chicago, Illinois 60606

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

Copies to:

Thomas S. Harman

Bingham McCutchen LLP

2020 K Street NW

Washington, DC 20006-1806

Approximate Date of Proposed Public Offering:

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

If the 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.   x

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

¨   When declared effective pursuant to section 8(c)

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 which specifically states this Registration Statement shall thereafter become effective in accordance with Section 8(a) of the Securities Act of 1933 or until the Registration Statement shall become effective on such dates as the Securities and Exchange Commission, acting pursuant to said Section 8(a), may determine.

The information in this 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 Prospectus is not an offer to sell these securities and is not soliciting an offer to buy these securities in any jurisdiction where the offer or sale is not permitted.

PRELIMINARY PROSPECTUS

1.6 Million Common Shares

Nuveen Select Tax-Free Income Portfolio

Nuveen Select Tax-Free Income Portfolio (the “Fund”) is a diversified, closed-end management investment company. The Fund’s investment objective is to provide current income exempt from regular federal income tax, consistent with preservation of capital. The Fund seeks to achieve its investment objective by investing, under normal circumstances, at least 80% of its Managed Assets (as defined below under “Portfolio Contents”) in municipal securities and other related investments, the income from which is exempt from regular federal income tax. Under normal circumstances, the Fund invests at least 80% of its Managed Assets in municipal securities that at the time of investment are rated within the four highest grades by at least one of the nationally recognized statistical rating organizations (“NRSRO”) that rate such security or are unrated but judged to be of comparable quality by the Fund’s sub-adviser, Nuveen Asset Management, LLC (“Nuveen Asset Management”). The Fund may invest up to 20% of its Managed Assets in municipal securities that at the time of investment are rated below investment grade or are unrated but judged to be of comparable quality by Nuveen Asset Management. No more than 10% of the Fund’s Managed Assets may be invested in municipal securities rated below B3/B- or that are unrated but judged to be of comparable quality by Nuveen Asset Management. The Fund may also invest up to 20% of its Managed Assets in municipal securities that pay interest that is taxable under the federal alternative minimum tax applicable to individuals (“AMT Bonds”). In addition, the Fund intends to use leverage to seek to enhance its potential for current income exempt from regular federal income tax. The Fund cannot assure you that it will achieve its investment objective.

Investing in the Fund’s common shares involves certain risks that are described in the “Risk Factors” and “How the Fund Manages Risks” sections of this Preliminary Prospectus (“Prospectus”).

Neither the Securities and Exchange Commission (“SEC”) nor any state securities commission has approved or disapproved of these securities or determined if this Prospectus is truthful or complete. Any representation to the contrary is a criminal offense.

You should read this Prospectus, which contains important information about the Fund, before deciding whether to invest and retain it for future reference. A Preliminary Statement of Additional Information (“SAI”), dated December 14, 2012, containing additional information about the Fund, has been filed with the SEC and is incorporated by reference in its entirety into this Prospectus. You may request a free copy of the SAI, the table of contents of which is on the last page of this Prospectus, annual and semi-annual reports to shareholders and other information about the Fund, and make shareholder inquiries by calling (800) 257-8787, by writing to the Fund or from the Fund’s website (http://www.nuveen.com). The information contained in, or that can be accessed through, the Fund’s website is not part of this Prospectus. You also may obtain a copy of the SAI (and other information regarding the Fund) from the SEC’s web site (http://www.sec.gov).

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 governmental agency.

Portfolio Contents.     Under normal circumstances, the Fund will invest at least 80% of its Managed Assets (as defined below) in municipal securities and other related investments, (i) the income from which is exempt from regular federal income tax, as a fundamental policy, and (ii) that at the time of investment are rated investment grade quality, as a non-fundamental policy. “Managed Assets” means the total assets of the Fund, minus the sum of its accrued liabilities (other than Fund liabilities incurred for the express purpose of creating leverage). Total assets for this purpose shall include assets attributable to the Fund’s use of effective leverage (whether or not those assets are reflected in the Fund’s financial statements for purposes of generally accepted accounting principles), such as, but not limited to, the portion of assets in special purpose trusts of which the Fund owns the inverse floater certificates that has been effectively financed by the trust’s issuance of floating rate certificates. A security is considered investment grade quality if it is rated within the four highest letter grades (BBB or Baa or better) by at least one of the NRSROs that rate such security, or if it is unrated by any NRSRO

but judged to be of comparable quality by Nuveen Asset Management. Also, as a non-fundamental policy, the Fund may invest up to 20% of its Managed Assets in municipal securities that at the time of investment are rated below investment grade or are unrated but judged to be of comparable quality by Nuveen Asset Management. Additionally, as a non-fundamental policy, no more than 10% of the Fund’s Managed Assets may be invested in municipal securities rated below B3/B- or that are unrated but judged to be of comparable quality by Nuveen Asset Management. Municipal securities of below investment grade quality are regarded as having predominately speculative characteristics with respect to capacity to pay interest and repay principal, and are commonly referred to as junk bonds. The Fund may invest up to approximately 10% of its Managed Assets in inverse floating rate securities. The Fund may invest up to 20% of its Managed Assets in AMT Bonds. The Fund cannot assure you that it will achieve its investment objective.

Leverage.     The Fund intends to use leverage to seek to enhance its potential for current income exempt from regular federal income tax. The Fund intends to use leverage by investing in inverse floating rate securities that have the economic effect of leverage, or the Fund may leverage its capital structure by issuing senior securities, such as preferred shares, investing in debt securities or by borrowing. The Fund currently uses leverage by investing in inverse floating rate securities. If current market conditions change (for example, if there is a material decrease in the supply of inverse floating rate securities or if newly issued senior securities become a more attractive financing option), the Fund may leverage itself by issuing senior securities such as preferred shares, investing in debt securities, or by borrowing. The Fund’s total effective leverage (as defined in this prospectus) may be up to 10% of its Managed Assets. There can be no assurance that the Fund’s leverage strategy will be successful.

Adviser and Sub-adviser.     Nuveen Fund Advisors, Inc., the Fund’s investment adviser, is responsible for determining the Fund’s overall investment strategies and their implementation. Nuveen Asset Management is the Fund’s investment sub-adviser and oversees the day-to-day investment operations of the Fund.

Common shares will not be sold at a price less than current net asset value plus the per share amount of the commission to be paid to Nuveen Securities, LLC (“Nuveen Securities”). The Fund and Nuveen Securities will suspend the sale of common shares if the per share price of the shares is less than the minimum price. The Fund currently intends to distribute the shares offered pursuant to this Prospectus primarily through at-the-market transactions, although from time to time it may also distribute shares through an underwriting syndicate or a privately negotiated transaction. To the extent shares are distributed other than through at-the-market transactions, the Fund will file a supplement to this Prospectus describing such transactions. For information on how common shares may be sold, see the “Plan of Distribution” section of this Prospectus.

Common shares are listed on the New York Stock Exchange (“NYSE”). The trading or “ticker” symbol of the Fund is “NXP.” The Fund’s closing price on the NYSE on December 7, 2012 was $15.72.

The date of this Prospectus is December 14, 2012

You should rely only on the information contained or incorporated by reference into this Prospectus. The Fund has not authorized anyone to provide you with different information. The Fund is 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 will update this Prospectus to reflect any material changes to the disclosures herein.

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For example, NFA and Nuveen Asset Management may provide investment management services to other funds and accounts that follow investment objectives similar to those of the Fund. In certain circumstances, and subject to its fiduciary obligations under the Investment Advisers Act of 1940, Nuveen Asset Management may have to allocate a limited investment opportunity among its clients, which include closed-end funds, open-end funds and other commingled funds. NFA and Nuveen Asset Management have each adopted policies and procedures designed to address such situations and other potential conflicts of interests. For additional information about potential conflicts of interest, and the way in which NFA and Nuveen Asset Management address such conflicts, please see the SAI.

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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. See “Management of the Fund—Investment Adviser.”

Examples

The following examples illustrate the expenses (including the applicable transaction fees, if any, and estimated offering costs of $6.40) that a shareholder would pay on a $1,000 investment that is held for the time periods provided in the table. Each example assumes that all dividends and other distributions are reinvested in the Fund and that the Fund’s Annual Expenses, as provided above, remain the same. The examples also assume a 5% annual return.(1)

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The examples should not be considered a representation of future expenses. Actual expenses may be greater or less than those shown above.

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FINANCIAL HIGHLIGHTS

The following Financial Highlights table is intended to help a prospective investor understand the Fund’s financial performance for the periods shown. Certain information reflects financial results for a single share of Common Shares of the Fund. The total returns in the table represent the rate an investor would have earned or lost on an investment in Common Shares of the Fund (assuming reinvestment of all dividends). The information with respect to the fiscal year ended March 31, 2012 has been audited by Ernst & Young LLP, whose report for the fiscal year ended March 31, 2012, along with the financial statements of the Fund including the Financial Highlights for each of the periods indicated therein, are included in the Fund’s 2012 Annual Report. Also included is selected data for the six months ended September 30, 2012, which is unaudited and appears in the Fund’s 2012 Semi-Annual Report. A copy of the 2012 Annual Report and the 2012 Semi-Annual Report may be obtained from www.sec.gov or by visiting www.nuveen.com. The information contained in, or that can be accessed through, the Fund’s website is not part of this Prospectus. Past results are not indicative of future performance.

The following per share data and ratios have been derived from information provided in the financial statements.

Selected data for a Common Share outstanding throughout each period:

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TRADING AND NET ASSET VALUE INFORMATION

The following table shows for the periods indicated: (i) the high and low sales prices for the Common Shares reported as of the end of the day on the NYSE, (ii) the high and low net asset values of the Common Shares, and (iii) the high and low of the discount or premium to net asset value (expressed as a percentage) of the Common Shares.

The net asset value per Common Share, the market price and percent of premium/(discount) to net asset value per common share on December 7, 2012 were $15.42, $15.72, and 1.95%, respectively. As of November 30, 2012, the Fund had 16,564,789 Common Shares outstanding and net assets applicable to Common Shares of $254,885,783.

THE FUND

The Fund is a diversified, closed-end management investment company registered under the 1940 Act. The Fund was organized as a Massachusetts business trust on January 30, 1992, pursuant to a Declaration of Trust (the “Declaration”) governed by the laws of the Commonwealth of Massachusetts. The Fund’s Common Shares are listed on the NYSE under the symbol “NXP.”

The following provides information about the Fund’s outstanding Common Shares as of November 30, 2012:

The Fund’s principal office is located at 333 West Wacker Drive, Chicago, Illinois 60606, and its telephone number is (800) 257-8787.

USE OF PROCEEDS

The net proceeds from the issuance of Common Shares hereunder will be used by the Fund to invest in municipal securities in accordance with the Fund’s investment objective and policies as stated below. To the extent the Fund uses the net proceeds of any offering to invest in municipal securities, it is presently anticipated that the Fund will be able to invest substantially all of such proceeds in securities that meet the Fund’s investment objective and policies within one month from the date on which the proceeds from an offering are received by the Fund. Pending such investment, it is anticipated that the proceeds will be invested in short-term or long-term securities issued by the U.S. Government and its agencies or instrumentalities or in high quality, short-term money market instruments. See “Risk Factors—Leverage Risk” and “Use of Leverage.”

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THE FUND’S INVESTMENTS

Investment Objective

The Fund’s investment objective is to provide current income exempt from regular federal income tax, consistent with preservation of capital.

Investment Philosophy and Process

Philosophy

Nuveen Asset Management believes that the unique tax treatment of municipal securities and the structural characteristics in the municipal securities market create attractive opportunities to enhance the after-tax total return and diversification of the investment portfolios of taxable investors. Nuveen Asset Management believes that these unique characteristics also present unique risks that may be managed to realize the benefits of the asset class. Nuveen Asset Management considers the following factors:

After-Tax Income Potential.     The primary source of total return from municipal securities comes from the tax-exempt income derived therefrom. Nuveen Asset Management believes that, at acceptable levels of credit risk and maturity principal risk, the municipal securities market offers the potential for higher after-tax income when compared with other fixed income markets.

Managing Multi-Faceted Risks.     Risk in the municipal securities market is derived from multiple sources, including credit risk at the issuer and sector levels, structural risks such as call risk, yield curve risk, and legislative and tax-related risks. Nuveen Asset Management believes that managing these risks at both the individual security and Fund portfolio levels is an important element of realizing the after-tax income and total return potential of the asset class.

Opportunities to Identify Underrated and Undervalued Municipal Securities.     Within the state and national municipal securities markets, there are issuers with a wide array of financing purposes, security terms, offering structures and credit quality. Nuveen Asset Management believes that the size, depth and other characteristics of the state and national municipal securities markets offer a broad opportunity set of individual issuers in securities that may be underrated and undervalued relative to the general market.

Market Inefficiencies.     Nuveen Asset Management believes that the scale and intricacy of the municipal securities market often results in pricing anomalies and other inefficiencies that can be identified and capitalized on through trading strategies.

Investment Process

Nuveen Asset Management believes that a bottom-up, research-driven investment strategy that seeks to identify underrated and undervalued securities and sectors is positioned to capture the opportunities inherent in the municipal securities market and potentially outperform the general municipal securities market over time. The primary elements of Nuveen Asset Management’s investment process are:

Credit Analysis and Surveillance.     Nuveen Asset Management focuses on bottom-up, fundamental analysis of municipal securities issuers. Analysts screen each sector for issuers that meet the fundamental tests of creditworthiness and favor those securities with demonstrable growth potential, solid coverage of debt service and a priority lien on hard assets, dedicated revenue streams or tax resources. As part of Nuveen Asset Management’s overall risk management process, analysts actively monitor the credit quality of portfolio holdings.

Sector Analysis.     Organized by sector, analysts continually assess the key issues and trends affecting each sector in order to maintain a sector outlook. Evaluating such factors as historical default rates and average credit spreads within each sector, analysts provide top-down analysis that supports decisions to overweight or underweight a given sector in a portfolio.

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Managing Risk.     Nuveen Asset Management seeks to manage portfolio risks, including, principally, exposure to individual credits and sectors and exposure to calls, and to manage a portfolio’s interest rate sensitivity within tolerance bands relative to the relevant benchmark.

Trading Strategies.     Through its trading strategies, Nuveen Asset Management seeks to enhance portfolio value by trading to take advantage of inefficiencies found in the municipal market. This may entail selling issues Nuveen Asset Management deems to be overvalued and purchasing issues Nuveen Asset Management considers to be undervalued.

Sell Discipline.     Nuveen Asset Management generally sells securities when it (i) determines a security has become overvalued or over-rated, (ii) identifies credit deterioration, or (iii) modifies a portfolio strategy, such as sector allocation.

Investment Policies

Under normal circumstances and as a fundamental policy, the Fund will invest at least 80% of its Managed Assets in municipal securities and other related investments, the income from which is exempt from regular federal income tax. The Fund may invest up to 20% of its Managed Assets in AMT Bonds.

As a non-fundamental policy, the Fund seeks to achieve its investment objective by investing in a diversified portfolio of municipal securities at least 80% comprised of investment grade quality securities, the income from which is exempt from regular federal income tax. Nuveen Asset Management seeks to identify and invest in municipal securities that it believes are underrated and undervalued, based on a bottom-up, research-driven investment strategy. Nuveen Asset Management believes its value oriented strategy offers the opportunity to construct a well-diversified portfolio of municipal securities that has the potential to outperform major municipal market benchmarks over the longer term. Underrated municipal securities are those whose credit ratings do not, in Nuveen Asset Management’s opinion, reflect their true creditworthiness. Undervalued municipal securities are securities that, in Nuveen Asset Management’s opinion, are worth more than the value assigned to them in the marketplace. A municipal security’s market value generally will depend upon its form, maturity, call features and interest rate, as well as the issuer’s credit quality or credit rating, all such factors examined in the context of the municipal securities market and interest rate levels and trends. Nuveen Asset Management may at times believe that securities associated with a particular municipal market sector (for example, electric utilities), or issued by a particular municipal issuer, are undervalued. Nuveen Asset Management may purchase such a security for the Fund’s portfolio because it represents a market sector or issuer that Nuveen Asset Management considers undervalued, even if the value of the particular security appears to be consistent with the value of similar securities. Municipal securities of particular types ( e.g. , hospital bonds, industrial revenue bonds or securities issued by a particular municipal issuer) may be undervalued because there is a temporary excess of supply in that market sector, or because of a general decline in the market price of municipal securities of the market sector for reasons that do not apply to the particular municipal securities that are considered undervalued. A rating issued by an NRSRO is only the opinion of the entity issuing the rating, and is not a guarantee as to quality, or an assurance of the performance, of the rated security. In addition, the manner in which NRSROs obtain and process information about a particular security may affect the NRSRO’s ability to timely react to changes in an issuer’s circumstances that could influence a particular rating. The Fund’s investment in underrated or undervalued municipal securities will be based on Nuveen Asset Management’s belief that their yield is higher than that available on securities bearing equivalent levels of interest rate risk, credit risk and other forms of risk, and that their prices will ultimately rise (relative to the market) to reflect their true value. The Fund attempts to increase its portfolio value relative to the municipal bond market by prudent selection of municipal securities regardless of the direction the market may move. Any capital appreciation realized by the Fund will generally result in the distribution of taxable capital gains to Common Shareholders.

The Fund may invest in various municipal securities, including municipal bonds and notes, other securities issued to finance and refinance public projects, and other related securities and derivative instruments creating

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exposure to municipal bonds, notes and securities that provide for the payment of interest income that is exempt from regular federal income tax. Municipal securities are often issued by state and local governmental entities to finance or refinance public projects, such as roads, schools, and water supply systems. Municipal securities also may be issued on behalf of private entities or for private activities, such as housing, medical and educational facility construction, or for privately owned transportation, electric utility or pollution control projects. Municipal securities may be issued on a long-term basis to provide long-term financing. The repayment of such debt may be secured generally by a pledge of the full faith and credit taxing power of the issuer, a limited or special tax, or any other revenue source, including project revenues, which may include tolls, fees and other user charges, lease payments, and mortgage payments. Municipal securities also may be issued to finance projects on a short-term interim basis, anticipating repayment with the proceeds of the later issuance of long-term debt. The Fund may purchase municipal securities in the form of bonds, notes, leases or certificates of participation; structured as callable or non-callable; with payment forms that include fixed coupon, variable rate or zero coupon, including capital appreciation bonds, floating rate securities, and inverse floating rate securities; or acquired through investments in pooled vehicles, partnerships, or other investment companies. The Fund may invest in these types of securities, including floating rate securities and inverse floating rate securities, in order to more efficiently achieve its desired overall portfolio structure as well as enhance its ability to achieve its investment objective.

The Fund intends to use leverage to seek to enhance its potential for current income exempt from regular federal income tax. The Fund intends to use leverage by investing in inverse floating rate securities that have the economic effect of leverage, as discussed further below. The Fund may leverage its capital structure by issuing senior securities such as preferred shares or debt securities or by borrowing. The combined economic effect of the total leverage used by the Fund is referred to as “effective leverage.” The Fund currently uses leverage by investing in inverse floating rate securities. If current market conditions change (for example, if there is a material decrease in the supply of inverse floating rate securities or if newly issued senior securities become a more attractive financing option), the Fund may leverage itself by issuing senior securities such as preferred shares or debt securities, or by borrowing. Financial leverage is created as a result of the Fund’s investments in residual interest certificates of tender option bond trusts, also called inverse floating rate securities, because the Fund’s investment exposure to the underlying bonds held by the trust have been effectively financed by the trust’s issuance of floating rate certificates. In addition, the Fund may borrow for temporary, emergency or other purposes as permitted by the 1940 Act. The Fund’s total effective leverage may be up to 10% of its Managed Assets. As of September 30, 2012, the Fund’s total effective leverage was approximately 1% of its Managed Assets.

There can be no assurance that the Fund’s leverage strategy will be successful. The use of leverage creates special risks for Common Shareholders. See “Use of Leverage,” “Risk Factors—Leverage Risk,” and “Risk Factors—Inverse Floating Rate Securities Risk.”

The Fund also may invest in derivative instruments in pursuit of its investment objective, including inverse floating rate securities. Such also instruments include financial futures contracts, swap contracts (including interest rate and credit default swaps), options on financial futures, options on swap contracts, or other derivative instruments. However, the Fund not enter into futures contracts or related options or forward contracts, if more than 30% of the Fund’s net assets would be represented by futures contracts or more than 5% of the Fund’s net assets would be committed to initial margin deposits and premiums on futures contracts and related options. Nuveen Asset Management uses derivatives to seek to enhance return, to hedge some of the risks of its investments in fixed income securities or as a substitute for a position in the underlying asset. These types of hedging strategies may generate taxable income. See “The Fund’s Investments.”

Under normal circumstances:

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The credit quality policies noted above 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 downgrades its assessment of the credit characteristics of a particular issue. In determining whether to retain or sell such a security, Nuveen Asset Management may consider such factors as Nuveen Asset Management’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. A general description of the ratings of municipal securities of S&P, Moody’s and Fitch is set forth in Appendix A to the SAI.

The Fund may purchase municipal securities that are additionally secured by insurance, bank credit agreements or escrow accounts. The credit quality of companies that provide such credit enhancements will affect the value of those securities. Although the insurance feature is designed to reduce certain financial risks, the premiums for insurance and the higher market price paid for insured obligations may reduce the Fund’s income. The Fund may use any insurer, regardless of its rating. A municipal security typically will be deemed to have the rating of its insurer. However, in the event an insurer has a credit rating below the rating of an underlying municipal security or is perceived by the market to have such a lower rating, the municipal security rating would be the more relevant rating and the value of the municipal security would more closely, if not entirely, reflect such rating. As a result, the value of insurance associated with a municipal security may decline and the insurance may not add any value. The insurance feature normally provides that it guarantees the full payment of principal and interest when due of an insured obligation, but does not guarantee the market value of the insured obligation or the net asset value of the Common Shares represented by such insured obligation. See “Risk Factors—Insurance Risk.”

During temporary defensive periods or in order to keep the Fund’s cash fully invested, including during the period when the net proceeds of the offering of Common Shares are being invested, the Fund may deviate from its investment policies and objectives. During such periods, the Fund may invest up to 100% of its Managed Assets in short-term investments, including high quality, short-term securities that may be either tax-exempt or taxable. The Fund intends to invest in taxable short-term investments only in the event that suitable tax-exempt short-term investments are not available at reasonable prices and yields. Investment in taxable short-term investments would result in a portion of your dividends being subject to regular federal income tax, and if the proportion of taxable investments exceeded 50% of the Fund’s total assets as of the close of any quarter of the

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Fund’s taxable year, the Fund would not satisfy the general eligibility test that permits it to pay exempt-interest dividends. Such transactions will be used solely to reduce risk. There can be no assurance that such strategies will be successful. For more information, see the SAI under “Tax Matters.”

The Fund’s investment objective and certain investment policies specifically identified as such are considered fundamental and may not be changed without shareholder approval. See “Investment Restrictions” in the SAI. All of the Fund’s other investment policies are not considered to be fundamental by the Fund and can be changed by the Fund’s Board of Trustees without a vote of the Common Shareholders. The Fund cannot change its investment objective or fundamental policies without the approval of the holders of a “majority of the outstanding” Common Shares and preferred shares, if issued in the future, voting together as a single class, and of the holders of a “majority of the outstanding” preferred shares, if issued in the future, voting as a separate class. When used with respect to particular shares of the Fund, a “majority of the outstanding” shares means (i) 67% or more of the shares present at a meeting, if the holders of more than 50% of the shares are present or represented by proxy, or (ii) more than 50% of the shares, whichever is less. See “Description of Shares—Preferred Shares—Voting Rights” for additional information with respect to the voting rights of holders of preferred shares.

If you are, or as a result of investment in the Fund would become, subject to the federal alternative minimum tax, the Fund may not be a suitable investment for you because the Fund may invest up to 20% of its Managed Assets in municipal securities that will pay interest that is taxable under the federal alternative minimum tax. Special rules apply to corporate holders. In addition, distributions of net capital gain will be subject to capital gains taxes. See “Tax Matters.”

Municipal Securities

General.     The Fund may invest in various municipal securities, including municipal bonds and notes, other securities issued to finance and refinance public projects, and other related securities and derivative instruments creating exposure to municipal bonds, notes and securities that provide for the payment of interest income that is exempt from regular federal income tax. Municipal securities are often issued by state and local governmental entities to finance or refinance public projects such as roads, schools, and water supply systems. Municipal securities may also be issued on behalf of private entities or for private activities, such as housing, medical and educational facility construction, or for privately owned transportation, electric utility and pollution control projects. Municipal securities may be issued on a long term basis to provide permanent financing. The repayment of such debt may be secured generally by a pledge of the full faith and credit taxing power of the issuer, a limited or special tax, or any other revenue source, including project revenues, which may include tolls, fees and other user charges, lease payments and mortgage payments. Municipal securities may also be issued to finance projects on a short-term interim basis, anticipating repayment with the proceeds of the later issuance of long-term debt. The Fund may purchase municipal securities in the form of bonds, notes, leases or certificates of participation; structured as callable or non-callable; with payment forms including fixed coupon, variable rate, zero coupon, capital appreciation bonds, tender option bonds, and residual interest bonds or inverse floating rate securities; or acquired through investments in pooled vehicles, partnerships or other investment companies. Inverse floating rate securities are securities that pay interest at rates that vary inversely with changes in prevailing short-term tax-exempt interest rates and represent a leveraged investment in an underlying municipal security, which could have the economic effect of financial leverage.

Municipal securities are either general obligation or revenue bonds and typically are issued to finance public projects (such as roads or public buildings), to pay general operating expenses, or to refinance outstanding debt.

Municipal securities may also be issued on behalf of private entities or for private activities, such as housing, medical and educational facility construction, or for privately owned industrial development and pollution control projects. General obligation bonds are backed by the full faith and credit, or taxing authority, of the issuer and may be repaid from any revenue source; revenue bonds may be repaid only from the revenues of a specific facility or source. The Fund may also purchase municipal securities that represent lease obligations,

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municipal notes, pre-refunded municipal securities, private activity bonds, tender option bonds and other related securities and derivative instruments that create exposure to municipal bonds, notes and securities and that provide for the payment of interest income that is exempt from regular federal income tax.

The municipal securities in which the Fund will invest are generally issued by states, cities and local authorities and certain possessions and territories of the United States (such as Puerto Rico and Guam), and pay interest that, in the opinion of bond counsel to the issuer (or on the basis of other authority believed by Nuveen Asset Management to be reliable), is exempt from regular federal income tax, although the interest may be subject to the federal alternative minimum tax. The yields on municipal securities depend on a variety of factors, including prevailing interest rates and the condition of the general money market and the municipal bond market, the size of a particular offering, the maturity of the obligation and the rating of the issue. The market value of municipal securities will vary with changes in interest rate levels and as a result of changing evaluations of the ability of their issuers to meet interest and principal payments.

A municipal security’s market value generally will depend upon its form, maturity, call features, and interest rate, as well as the credit quality of the issuer, all such factors examined in the context of the municipal securities market and interest rate levels and trends.

Municipal Leases and Certificates of Participation.     The Fund also may purchase municipal securities that represent lease obligations and certificates of participation in such leases. These carry special risks because the issuer of the securities may not be obligated to appropriate money annually to make payments under the lease. A municipal lease is an obligation in the form of a lease or installment purchase which is issued by a state or local government to acquire equipment and facilities. Income from such obligations is generally exempt from state and local taxes in the state of issuance. Leases and installment purchase or conditional sale contracts (which normally provide for title to the leased asset to pass eventually to the governmental issuer) have evolved as a means for governmental issuers to acquire property and equipment without meeting the constitutional and statutory requirements for the issuance of debt. The debt issuance limitations are deemed to be inapplicable because of the inclusion in many leases or contracts of “non-appropriation” clauses that relieve the governmental issuer of any obligation to make future payments under the lease or contract unless money is appropriated for such purpose by the appropriate legislative body on a yearly or other periodic basis. In addition, such leases or contracts may be subject to the temporary abatement of payments in the event the issuer is prevented from maintaining occupancy of the leased premises or utilizing the leased equipment or facilities. Although the obligations may be secured by the leased equipment or facilities, the disposition of the property in the event of non-appropriation or foreclosure might prove difficult, time consuming and costly, and result in a delay in recovering, or the failure to recover fully, the Fund’s original investment. To the extent that the Fund invests in unrated municipal leases or participates in such leases, the credit quality rating and risk of cancellation of such unrated leases will be monitored on an ongoing basis. In order to reduce this risk, the Fund will only purchase municipal securities representing lease obligations where Nuveen Asset Management believes the issuer has a strong incentive to continue making appropriations until maturity.

A certificate of participation represents an undivided interest in an unmanaged pool of municipal leases, an installment purchase agreement or other instruments. The certificates are typically issued by a municipal agency, a trust or other entity that has received an assignment of the payments to be made by the state or political subdivision under such leases or installment purchase agreements. Such certificates provide the Fund with the right to a pro rata undivided interest in the underlying municipal securities. In addition, such participations generally provide the Fund with the right to demand payment, on not more than seven days’ notice, of all or any part of the Fund’s participation interest in the underlying municipal securities, plus accrued interest.

Municipal Notes.     Municipal securities in the form of notes generally are used to provide for short-term capital needs, in anticipation of an issuer’s receipt of other revenues or financing, and typically have maturities of up to three years. Such instruments may include tax anticipation notes, revenue anticipation notes, bond anticipation notes, tax and revenue anticipation notes and construction loan notes. Tax anticipation notes are issued to finance the working capital needs of governments. Generally, they are issued in anticipation of various

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tax revenues, such as income, sales, property, use and business taxes, and are payable from these specific future taxes. Revenue anticipation notes are issued in expectation of receipt of other kinds of revenue, such as federal revenues available under federal revenue sharing programs. Bond anticipation notes are issued to provide interim financing until long- term bond financing can be arranged. In most cases, the long-term bonds then provide the funds needed for repayment of the bond anticipation notes. Tax and revenue anticipation notes combine the funding sources of both tax anticipation notes and revenue anticipation notes. Construction loan notes are sold to provide construction financing. Mortgage notes insured by the Federal Housing Authority secure these notes; however, the proceeds from the insurance may be less than the economic equivalent of the payment of principal and interest on the mortgage note if there has been a default. The anticipated revenues from taxes, grants or bond financing generally secure the obligations of an issuer of municipal notes. An investment in such instruments, however, presents a risk that the anticipated revenues will not be received or that such revenues will be insufficient to satisfy the issuer’s payment obligations under the notes or that refinancing will be otherwise unavailable.

Pre-Refunded Municipal Securities.     The principal of and interest on pre-refunded municipal securities are no longer paid from the original revenue source for the securities. Instead, the source of such payments is typically an escrow fund consisting of U.S. government securities. The assets in the escrow fund are derived from the proceeds of refunding bonds issued by the same issuer as the pre-refunded municipal securities. Issuers of municipal securities use this advance refunding technique to obtain more favorable terms with respect to securities that are not yet subject to call or redemption by the issuer. For example, advance refunding enables an issuer to refinance debt at lower market interest rates, restructure debt to improve cash flow or eliminate restrictive covenants in the indenture or other governing instrument for the pre-refunded municipal securities. However, except for a change in the revenue source from which principal and interest payments are made, the pre-refunded municipal securities remain outstanding on their original terms until they mature or are redeemed by the issuer.

Private Activity Bonds.     Private activity bonds, formerly referred to as industrial development bonds, are issued by or on behalf of public authorities to obtain funds to provide privately operated housing facilities, airport, mass transit or port facilities, sewage disposal, solid waste disposal or hazardous waste treatment or disposal facilities and certain local facilities for water supply, gas or electricity. Other types of private activity bonds, the proceeds of which are used for the construction, equipment, repair or improvement of privately operated industrial or commercial facilities, may constitute municipal securities, although the current federal tax laws place substantial limitations on the size of such issues. The Fund’s distributions of its interest income from private activity bonds may subject certain investors to the federal alternative minimum tax.

Special Taxing Districts.     Special taxing districts are organized to plan and finance infrastructure developments to induce residential, commercial and industrial growth and redevelopment. The bond financing methods such as tax increment finance, tax assessment, special services district and Mello-Roos bonds, are generally payable solely from taxes or other revenues attributable to the specific projects financed by the bonds without recourse to the credit or taxing power of related or overlapping municipalities. They often are exposed to real estate development-related risks and can have more taxpayer concentration risk than general tax-supported bonds, such as general obligation bonds. Further, the fees, special taxes, or tax allocations and other revenues that are established to secure such financings are generally limited as to the rate or amount that may be levied or assessed and are not subject to increase pursuant to rate covenants or municipal or corporate guarantees. The bonds could default if development failed to progress as anticipated or if larger taxpayers failed to pay the assessments, fees and taxes as provided in the financing plans of the districts.

When-Issued and Delayed Delivery Transactions.     The Fund may buy and sell municipal securities on a when-issued or delayed delivery basis, making payment or taking delivery at a later date, normally within 15 to 45 days of the trade date. This type of transaction may involve an element of risk because no interest accrues on the bonds prior to settlement and, because bonds are subject to market fluctuations, the value of the bonds at time of delivery may be less (or more) than cost. A separate account of the Fund will be established with its custodian consisting of cash, cash equivalents, or liquid securities having a market value at all times at least equal to the amount of the commitment.

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Zero Coupon Bonds.     A zero coupon bond is a bond that typically does not pay interest either for the entire life of the obligation or for an initial period after the issuance of the obligation. When held to its maturity, the holder receives the par value of the zero coupon bond, which generates a return equal to the difference between the purchase price and its maturity value. A zero coupon bond is normally issued and traded at a deep discount from face value. This original issue discount (“OID”) approximates the total amount of interest the security will accrue and compound prior to its maturity and reflects the payment deferral and credit risk associated with the instrument. Because zero coupon securities and other OID instruments do not pay cash interest at regular intervals, the instruments’ ongoing accruals require ongoing judgments concerning the collectability of deferred payments and the value of any associated collateral. As a result, these securities may be subject to greater value fluctuations and less liquidity in the event of adverse market conditions than comparably rated securities that pay cash on a current basis. Because zero coupon bonds, and OID instruments generally, allow an issuer to avoid or delay the need to generate cash to meet current interest payments, they may involve greater payment deferral and credit risk than coupon loans and bonds that pay interest currently or in cash. The Fund generally will be required to distribute dividends to shareholders representing the income of these instruments as it accrues, even though the Fund will not receive all of 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, and use the cash proceeds to make income distributions to its shareholders. For accounting purposes, these cash distributions to shareholders will not be treated as a return of capital.

Further, NFA collects management fees on the value of a zero coupon bond or OID instrument attributable to the ongoing non-cash accrual of interest over the life of the bond or other instrument. As a result, NFA receives non-refundable cash payments based on such non-cash accruals while investors incur the risk that such non-cash accruals ultimately may not be realized.

Inverse Floating Rate Securities

Inverse floating rate securities (sometimes referred to as “inverse floaters”) are securities whose interest rates bear an inverse relationship to the interest rate on another security or the value of an index. Generally, inverse floating rate securities represent beneficial interests in a special purpose trust formed by a third party sponsor for the purpose of holding municipal bonds. The special purpose trust typically sells two classes of beneficial interests or securities: floating rate securities (sometimes referred to as short-term floaters or tender option bonds) and inverse floating rate securities (sometimes referred to as inverse floaters or residual interest securities). Both classes of beneficial interests are represented by certificates. The short-term floating rate securities have first priority on the cash flow from the municipal bonds held by the special purpose trust. Typically, a third party, such as a bank, broker-dealer or other financial institution, grants the floating rate security holders the option, at periodic intervals, to tender their securities to the institution and receive the face value thereof. As consideration for providing the option, the financial institution receives periodic fees. The holder of the short-term floater effectively holds a demand obligation that bears interest at the prevailing short-term, tax-exempt rate. However, the institution granting the tender option will not be obligated to accept tendered short-term floaters in the event of certain defaults or a significant downgrade in the credit rating assigned to the bond issuer. For its inverse floating rate investment, the Fund receives the residual cash flow from the special purpose trust. Because the holder of the short-term floater is generally assured liquidity at the face value of the security, the Fund as the holder of the inverse floater assumes the interest rate cash flow risk and the market value risk associated with the municipal security deposited into the special purpose trust. The volatility of the interest cash flow and the residual market value will vary with the degree to which the trust is leveraged. This is expressed in the ratio of the total face value of the short-term floaters in relation to the value of the residual inverse floaters that are issued by the special purpose trust. The Fund expects to make limited investments in inverse floaters, with leverage ratios that may vary at inception between one and three times. In addition, all voting rights and decisions to be made with respect to any other rights relating to the municipal bonds held in the special purpose trust are passed through to the Fund, as the holder of the residual inverse floating rate securities.

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Because increases in the interest rate on the short-term floaters reduce the residual interest paid on inverse floaters, and because fluctuations in the value of the municipal bond deposited in the special purpose trust affect the value of the inverse floater only, and not the value of the short-term floater issued by the trust, and because fluctuations in the value of the municipal bond deposited in the special purpose trust affect the value of the inverse floater only, and not the value of the short-term floater issued by the trust, inverse floaters’ value is generally more volatile than that of fixed rate bonds. The market price of inverse floating rate securities is generally more volatile than the underlying securities due to the leveraging effect of this ownership structure. These securities generally will underperform the market of fixed rate bonds in a rising interest rate environment ( i.e. , when bond values are falling), but tend to outperform the market of fixed rate bonds when interest rates decline or remain relatively stable. Although volatile, inverse floaters typically offer the potential for yields exceeding the yields available on fixed rate bonds with comparable credit quality, coupon, call provisions and maturity. Inverse floaters have varying degrees of liquidity based upon the liquidity of the underlying securities deposited in a special purpose trust.

The Fund may invest in inverse floating rate securities, issued by special purpose trusts that have recourse to the Fund. In Nuveen Asset Management’s discretion, the Fund may enter into a separate shortfall and forbearance agreement with the third party sponsor of a special purpose trust. The Fund may enter into such recourse agreements (i) when the liquidity provider to the special purpose trust requires such an agreement because the level of leverage in the trust exceeds the level that the liquidity provider is willing support absent such an agreement; and/or (ii) to seek to prevent the liquidity provider from collapsing the trust in the event that the municipal obligation held in the trust has declined in value. Such an agreement would require the Fund to reimburse the third party sponsor of such inverse floater, upon termination of the trust issuing the inverse floater, the difference between the liquidation value of the bonds held in the trust and the principal amount due to the holders of floating rate interests. Such agreements may expose the Fund to a risk of loss that exceeds its investment in the inverse floating rate securities. Absent a shortfall and forbearance agreement, the Fund would not be required to make such a reimbursement. If the Fund chooses not to enter into such an agreement, the special purpose trust could be liquidated and the Fund could incur a loss. See also “Segregation of Assets” in the SAI.

The Fund may invest in both inverse floating rate securities and floating rate securities (as discussed below) issued by the same special purpose trust. The Fund will segregate or earmark liquid assets with its custodian in accordance with the 1940 Act to cover its obligations with respect to its investments in special purpose trusts.

Investments in inverse floating rate securities create effective leverage. The use of leverage creates special risks for Common Shareholders. See “Use of Leverage,” “Risk Factors—Leverage Risk,” and “Risk Factors—Inverse Floating Rate Securities Risk.”

Floating Rate Securities.     The Fund may also invest in floating rate securities issued by special purpose trusts. Floating rate securities may take the form of short-term floating rate securities or the option period may be substantially longer. Generally, the interest rate earned will be based upon the market rates for municipal securities with maturities or remarketing provisions that are comparable in duration to the periodic interval of the tender option, which may vary from weekly, to monthly, to extended periods of one year or multiple years. Since the option feature has a shorter term than the final maturity or first call date of the underlying bond deposited in the trust, the Fund as the holder of the floating rate security relies upon the terms of the agreement with the financial institution furnishing the option as well as the credit strength of that institution. As further assurance of liquidity, the terms of the trust provide for a liquidation of the municipal security deposited in the trust and the application of the proceeds to pay off the floating rate security. The trusts that are organized to issue both short-term floating rate securities and inverse floaters generally include liquidation triggers to protect the investor in the floating rate security.

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Structured Notes

The Fund may utilize structured notes and similar instruments for investment purposes and also for hedging purposes. Structured notes are privately negotiated debt obligations where 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. The terms of such structured instruments normally provide that their principal and/or interest payments are to be adjusted upwards or downwards (but not ordinarily 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 upon 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 or indices or other assets. Application of a multiplier involves leverage that will serve to magnify the potential for gain and the risk of loss. These types of investments may generate taxable income.

Derivatives

The Fund may invest in certain derivative instruments in pursuit of its investment objective. Such instruments include financial futures contracts, swap contracts (including interest rate and credit default swaps), options on financial futures, options on swap contracts or other derivative instruments. In particular, the Fund may use credit default swaps and interest rate swaps. Credit default swaps may require initial premium (discount) payments as well as periodic payments (receipts) related to the interest leg of the swap or to the default of a reference obligation. If the Fund is a seller of a contract, the Fund would be required to pay the par (or other agreed upon) value of a referenced debt obligation to the counterparty in the event of a default or other credit event by the reference issuer, such as a U.S. or foreign corporate issuer, with respect to such debt obligations. In return, the Fund would receive from the counterparty a periodic stream of payments over the term of the contract provided that no event of default has occurred. If no default occurs, the Fund would keep the stream of payments and would have no payment obligations. As the seller, the Fund would be subject to investment exposure on the notional amount of the swap. If the Fund is a buyer of a contract, the Fund would have the right to deliver a referenced debt obligation and receive the par (or other agreed-upon) value of such debt obligation from the counterparty in the event of a default or other credit event (such as a credit downgrade) by the reference issuer, such as a U.S. or foreign corporation, with respect to its debt obligations. In return, the Fund would pay the counterparty a periodic stream of payments over the term of the contract provided that no event of default has occurred. If no default occurs, the counterparty would keep the stream of payments and would have no further obligations to the Fund. 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. The Fund will usually enter into interest rate swaps on a net basis; that is, the two payment streams will be netted out in a cash settlement on the payment date or dates specified in the instrument, with the Fund receiving or paying, as the case may be, only the net amount of the two payments. See “Hedging Strategies and Other Uses of Derivatives” and “Segregation of Assets” in the SAI.

Limitations on the Use of Futures, Futures Options and Swaps.      Pursuant to a claim for exemption filed with the National Futures Association on behalf of the Fund, the Fund is not deemed to be a commodity pool operator or a commodity pool under the Commodity Exchange Act (“CEA”) and neither it nor NFA or Nuveen Asset Management is currently subject to registration or regulation as such under the CEA. In February 2012, the Commodity Futures Trading Commission (“CFTC”) announced substantial amendments to certain exemptions, and to the conditions for reliance on those exemptions, from registration as a commodity pool operator. Under amendments to the exemption provided under CFTC Regulation 4.5, if the Fund uses futures, options on futures, or swaps other than for bona fide hedging purposes (as defined by the CFTC), the aggregate initial margin and premiums on these positions (after taking into account unrealized profits and unrealized losses on any such positions and excluding the amount by which options that are “in-the-money” at the time of purchase are “in-the-money”) may not exceed 5% of the Fund’s net asset value, or alternatively, the aggregate net notional

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value of those positions may not exceed 100% of the Fund’s net asset value (after taking into account unrealized profits and unrealized losses on any such positions). The CFTC amendments to Regulation 4.5 will go into effect at the end of the compliance date of December 31, 2012, unless extended by the CFTC. Upon the compliance date, the Fund either will comply with amended Regulation 4.5’s requirements, or, if required, NFA and/or Nuveen Asset Management will register with respect to the Fund as a commodity pool operator with the CFTC. Registration by NFA and/or Nuveen Asset Management as a commodity pool operator would subject the Fund to dual regulation by the CFTC and SEC in accordance with rules that have not yet been finalized that are intended to “harmonize” compliance obligations of the two different regulatory regimes. The Fund reserves the right to engage in transactions involving futures, options thereon and swaps to the extent allowed by CFTC regulations in effect from time to time and in accordance with the Fund’s policies. The requirements for qualification as a regulated investment company may limit the extent to which the Fund may enter into futures transactions, engage in options transactions or engage in swap transactions.

Nuveen Asset Management may use derivative instruments to seek to enhance return, to hedge some of the risk of the Fund’s investments in municipal securities or as a substitute for a position in the underlying asset. These types of strategies may generate taxable income.

There is no assurance that these derivative strategies will be available at any time or that Nuveen Asset Management will determine to use them for the Fund or, if used, that the strategies will be successful.

Other Investment Companies

As a non-fundamental policy, the Fund may invest up to 10% of its Managed Assets in securities of other open- or closed-end investment companies (including exchange-traded funds (“ETFs”)) that invest primarily in municipal securities of the types in which the Fund may invest directly. In addition, the Fund may invest a portion of its Managed Assets in pooled investment vehicles (other than investment companies) that invest primarily in municipal securities of the types in which the Fund may invest directly. The Fund may invest in investment companies that are advised by the NFA, Nuveen Asset Management or their respective affiliates to the extent permitted by applicable law and/or pursuant to exemptive relief from the SEC. The Fund has not applied for and currently does not intend to apply for such relief. As a stockholder 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 advisory and administrative fees 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.

Nuveen Asset Management will take expenses into account when evaluating the investment merits of an investment in an investment company relative to available municipal security investments. In addition, the securities of other investment companies may also be leveraged and will therefore be subject to the same leverage risks described herein. As described in the section entitled “Risk Factors,” the net asset value and market value of leveraged shares will be more volatile and the yield to Common Shareholders will tend to fluctuate more than the yield generated by unleveraged shares.

Portfolio Turnover

The Fund may engage in portfolio trading when considered appropriate, but short-term trading will not be used as the primary means of achieving the Fund’s investment objective. Although the Fund cannot accurately predict its annual portfolio turnover rate, it is generally not expected to exceed 20% under normal circumstances. However, there are no limits on the Fund’s rate of portfolio turnover, and investments may be sold without regard to length of time held when, in Nuveen Asset Management’s opinion, investment considerations warrant such action. A higher portfolio turnover rate would result in correspondingly greater brokerage commissions and other transactional expenses that are borne by the Fund. Although these commissions and expenses are not reflected in the Fund’s “Total Annual Expenses” under “Summary of Fund Expenses” on page 22 of this prospectus, they will be reflected in the Fund’s total return. In addition, high portfolio turnover may result in the

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realization of net short-term capital gains by the Fund which, when distributed to shareholders, will be taxable as ordinary income. See “Tax Matters.”

USE OF LEVERAGE

The Fund intends to use leverage to seek to enhance its potential for current income exempt from regular federal income tax. The Fund intends to use leverage by investing in inverse floating rate securities that have the economic effect of leverage, as discussed further below. The Fund may leverage its capital structure by issuing senior securities such as preferred shares, investing in debt securities or by borrowing. The combined economic effect of the total leverage used by the Fund is referred to as “effective leverage.” The Fund currently uses leverage by investing in inverse floating rate securities. If current market conditions change (for example, if there is a material decrease in the supply of inverse floating rate securities or if newly issued senior securities become a more attractive financing option), the Fund may use other forms of leverage. Financial leverage is created as a result of the Fund’s investments in residual interest certificates of tender option bond trusts, also called inverse floating rate securities, because the Fund’s investment exposure to the underlying bonds held by the trust have been effectively financed by the trust’s issuance of floating rate certificates. The Fund’s total effective leverage may be up to 10% of its Managed Assets. As of September 30, 2012 the Fund’s total effective leverage was approximately 1% of its Managed Assets.

The Fund does not currently have any preferred shares or debt securities outstanding or any borrowings. The Fund may issue preferred shares or debt securities or borrow in the future to increase the Fund’s leverage. The timing and terms of any leverage transactions is determined by the Fund’s Board of Trustees. Borrowings and preferred shares, if any, will have seniority over the Common Shares.

Following an offering of additional Common Shares from time to time, the Fund’s leverage ratio will decrease as a result of the increase in net assets attributable to Common Shares. The Fund’s leverage ratio may decline further to the extent that the net proceeds of an offering of Common Shares are used to reduce the Fund’s financial leverage. A lower leverage ratio may result in lower (higher) returns to Common Shareholders over a period of time to the extent that net returns on the Fund’s investment portfolio exceed (fall below) its cost of leverage over that period, which lower (higher) returns may impact the level of the Fund’s distributions. See “Risk Factors—Leverage Risk and Inverse Floating Rate Securities.” Portfolio leverage is created through the Fund’s investments in inverse floating rate securities, because the Fund’s investment exposure to the underlying bonds held by the trust issuing the inverse floaters have been effectively financed by the trust’s issuance of floating rate certificates. See “Risk Factors—Inverse Floating Rate Securities Risk.”

The Fund pays NFA a management fee based on a percentage of net assets. Net assets for this purpose includes the proceeds realized from the Fund’s use of financial leverage. See “Management of the Fund—Investment Management and Investment Sub-Advisory Agreements.” NFA will base its decision whether and how much to leverage the Fund based solely on its assessment of whether such use of leverage will advance the Fund’s investment objective. NFA will be responsible for using leverage to achieve the Fund’s investment objective. However, the fact that a decision to increase the Fund’s leverage will have the effect of increasing net assets, and therefore NFA’s management fee, means that NFA may have an incentive to increase the Fund’s use of leverage. NFA will seek to manage that incentive by only increasing the Fund’s use of leverage when it determines that such increase is consistent with the Fund’s investment objective, and by periodically reviewing the Fund’s performance and use of leverage with the Fund’s Board of Trustees.

Leverage involves special risks. There is no assurance that the Fund’s leveraging strategy will be successful.

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RISK FACTORS

Risk is inherent in all investing. Investing in any investment company security involves risk, including the risk that you may receive little or no return on your investment or even that you may lose part or all of your investment. Therefore, before investing you should consider carefully the following risks that you assume when you invest in Common Shares.

Investment and Market Risk

An investment in the Fund’s Common Shares is subject to investment risk, including the possible loss of the entire principal amount that you invest. Your investment in Common Shares represents an indirect investment in the municipal securities owned by the Fund, which generally trade in the over-the-counter markets. Your Common Shares at any point in time may be worth less than your original investment, even after taking into account the reinvestment of Fund dividends and distributions. In addition, if the current national economic downturn deteriorates into a prolonged recession, the ability of municipalities to collect revenue and service their obligations could be materially and adversely affected.

Market Discount from Net Asset Value

Shares of closed-end investment companies like the Fund have during some periods traded at prices lower than net asset value. The Fund cannot predict whether Common Shares will trade at, above or below net asset value. This characteristic is a risk separate and distinct from the risk that the Fund’s net asset value could decrease as a result of investment activities. Investors bear a risk of loss to the extent that the price at which they sell their shares is lower in relation to the Fund’s net asset value than at the time of purchase, assuming a stable net asset value. Proceeds from the sale of Common Shares in this offering will be reduced by transaction costs (if applicable, which vary depending on the offering method used). Depending on the premium of the Common Shares at the time of any offering of Common Shares hereunder, the Fund’s net asset value may be reduced by an amount up to the offering costs borne by the Fund (estimated to be an additional 0.64% of the offering price assuming a Common Share offering price of $15.72 (the Fund’s closing price on the NYSE on December 7, 2012)). The net asset value per Common Share will be reduced by costs associated with any future offerings of Common or preferred shares. The Common Shares are designed primarily for long-term investors, and you should not view the Fund as a vehicle for trading purposes.

Credit and Below Investment Grade Risk

Credit risk is the risk that one or more municipal securities in the Fund’s portfolio will decline in price, or the issuer thereof will fail to pay interest or principal when due, because the issuer of the security experiences a decline in its financial status. In general, lower-rated municipal 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 impact on the Fund’s net asset value or dividends. Credit risk is increased when a portfolio security is downgraded or the perceived creditworthiness of the issuer deteriorates. The Fund may invest up to 20% of its Managed Assets in municipal securities that are rated below investment grade at the time of investment or that are unrated but judged to be of comparable quality by Nuveen Asset Management. If a municipal security satisfies the rating requirements described above at the time of investment and is subsequently downgraded below that rating, the Fund will not be required to dispose of the security. If a downgrade occurs, Nuveen Asset Management will consider what action, including the sale of the security, is in the best interests of the Fund and its shareholders. This means that the Fund may invest in municipal securities that are involved in bankruptcy or insolvency proceedings or are experiencing other financial difficulties at the time of acquisition (such securities are commonly referred to as distressed securities). Municipal securities of below investment grade quality, commonly referred to as junk bonds, are regarded as having predominately speculative characteristics with respect to capacity to pay interest and repay principal when due, and are susceptible to default or decline in market value due to adverse economic and business developments. Also, to the extent that the rating assigned to

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a municipal security in the Fund’s portfolio is downgraded by any NRSRO, the market price and liquidity of such security may be adversely affected. The market values for municipal securities of below investment grade quality tend to be volatile, and these securities are less liquid than investment grade municipal securities. For these reasons, an investment in the Fund, compared with a portfolio consisting solely of investment grade securities, may experience the following:

Adverse changes in economic conditions are more likely to lead to a weakened capacity of a below investment grade issuer to make principal payments and interest payments compared to an investment grade issuer. The principal amount of below investment grade securities outstanding has proliferated in the past decade as an increasing number of issuers have used below investment grade securities for financing. The current downturn may severely affect the ability of highly leveraged issuers to service their debt obligations or to repay their obligations upon maturity. As the national economy experiences the current economic downturn, resulting in decreased tax and other revenue streams of municipal issuers, or in the event interest rates rise sharply, increasing the interest cost on variable rate instruments and negatively impacting economic activity, the number of defaults by below investment grade municipal issuers is likely to increase. Similarly, downturns in profitability in specific industries could adversely affect private activity bonds. The market values of lower quality debt securities tend to reflect individual developments of the issuer to a greater extent than do higher quality securities, which react primarily to fluctuations in the general level of interest rates. Factors having an adverse impact on the market value of lower quality securities may have an adverse impact on the Fund’s net asset value and the market value of its Common Shares. In addition, the Fund may incur additional expenses to the extent it is required to seek recovery upon a default in payment of principal or interest on its portfolio holdings. In certain circumstances, the Fund may be required to foreclose on an issuer’s assets and take possession of its property or operations. In such circumstances, the Fund would incur additional costs in disposing of such assets and potential liabilities from operating any business acquired.

The secondary market for below investment grade securities may not be as liquid as the secondary market for more highly rated securities, a factor that may have an adverse effect on the Fund’s ability to dispose of a particular security. There are fewer dealers in the market for below investment grade municipal securities than the market for investment grade municipal securities. The prices quoted by different dealers for below investment grade municipal securities may vary significantly, and the spread between the bid and ask price is generally much larger for below investment grade municipal securities than for higher quality instruments. 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 these instruments may become illiquid. As a result, the Fund could find it more difficult to sell these securities or may be able to sell the securities only at prices lower than if such securities were widely traded. Prices realized upon the sale of such lower rated or unrated securities, under these circumstances, may be less than the prices used in calculating the Fund’s net asset value.

Issuers of such below investment grade securities are highly leveraged and may not have available to them more traditional methods of financing. Therefore, the risk associated with acquiring the securities of such issuers generally is greater than is the case with higher rated securities. For example, during an economic downturn or a sustained period of rising interest rates, highly leveraged issuers of below investment grade securities may

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experience financial stress. During such periods, such issuers may not have sufficient revenues to meet their interest payment obligations. The issuer’s ability to service its debt obligations also may be adversely affected by specific developments, the issuer’s inability to meet specific projected forecasts or the unavailability of additional financing. The risk of loss from default by the issuer is significantly greater for the holders of below investment grade securities because such securities are generally unsecured and are often subordinated to other creditors of the issuer. Prices and yields of below investment grade securities will fluctuate over time and, during periods of economic uncertainty, volatility of below investment grade securities may adversely affect the Fund’s net asset value. In addition, investments in below investment grade zero coupon bonds rather than income-bearing below investment grade securities, may be more speculative and may be subject to greater fluctuations in value due to changes in interest rates.

The Fund may invest in distressed securities, which are securities issued by companies that are involved in bankruptcy or insolvency proceedings or are experiencing other financial difficulties at the time of acquisition by the Fund. The issuers of such securities may be in transition, out of favor, financially leveraged or troubled, or potentially troubled, and may be or have recently been involved in major strategic actions, restructurings, bankruptcy, reorganization or liquidation. These characteristics of these companies can cause their securities to be particularly risky, although they also may offer the potential for high returns. These companies’ securities may be considered speculative, and the ability of the companies to pay their debts on schedule could be affected by adverse interest rate movements, changes in the general economic climate, economic factors affecting a particular industry or specific developments within the companies. Distressed securities frequently do not produce income while they are outstanding and may require the Fund to bear certain extraordinary expenses in order to protect and recover its investment.

Investments in lower rated or unrated securities may present special tax issues for the Fund to the extent that the issuers of these securities default on their obligations pertaining thereto, and the federal income tax consequences to the Fund as a holder of such distressed securities may not be clear.

Interest Rate Risk

Generally, when market interest rates rise, bond prices fall, and vice versa. Interest rate risk is the risk that the municipal securities in the Fund’s portfolio will decline in value because of increases in market interest rates. As interest rates decline, issuers of municipal securities may prepay principal earlier than scheduled, forcing the Fund to reinvest in lower-yielding securities and potentially reducing the Fund’s income. As interest rates increase, slower than expected principal payments may extend the average life of securities, potentially locking in a below-market interest rate and reducing the Fund’s value. In typical market interest rate environments, the prices of longer-term municipal securities generally fluctuate more than prices of shorter-term municipal securities as interest rates change. Because the Fund will invest primarily in longer-term municipal securities, the Common Share net asset value and market price per share will fluctuate more in response to changes in market interest rates than if the Fund invested primarily in shorter-term municipal securities. Because the values of lower-rated and comparable unrated debt securities are affected both by credit risk and interest rate risk, the price movements of such lower grade securities typically have not been highly correlated to the fluctuations of the prices of investment grade quality securities in response to changes in market interest rates. The Fund’s use of leverage, as described herein, will tend to increase Common Share interest rate risk.

Municipal Securities Market Risk

Investing in the municipal securities market involves certain risks. The municipal market is one in which dealer firms make markets in bonds on a principal basis using their proprietary capital, and during the recent market turmoil these firms’ capital was severely constrained. As a result, some firms were unwilling to commit their capital to purchase and to serve as a dealer for municipal bonds. The amount of public information available about the municipal securities in the Fund’s portfolio is generally less than that for corporate equities or bonds, and the investment performance of the Fund may therefore be more dependent on the analytical abilities of

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Nuveen Asset Management than if the Fund were a stock fund or taxable bond fund. The secondary market for municipal securities, particularly the below investment grade bonds in which the Fund may invest, also tends to be less well-developed or liquid than many other securities markets, which may adversely affect the Fund’s ability to sell its municipal securities at attractive prices or at prices approximating those at which the Fund currently values them.

The ability of municipal issuers to make timely payments of interest and principal may be diminished during general economic downturns and as governmental cost burdens are reallocated among federal, state and local governments. In addition, laws enacted in the future by Congress or state legislatures or referenda 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 municipalities to levy taxes. Issuers of municipal securities 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. Any income derived from the Fund’s ownership or operation of such assets may not be tax-exempt.

Reinvestment Risk

Reinvestment risk is the risk that income from the Fund’s portfolio will decline if and when the Fund invests the proceeds from matured, traded or called bonds at market interest rates that are below the portfolio’s current earnings rate. A decline in income could affect the Common Shares’ market price or their overall returns.

Leverage Risk

The Fund anticipates using leverage to seek to enhance total returns. The Fund’s total effective leverage may be up to 10% of its Managed Assets. The use of leverage creates special risks for Common Shareholders, including the likelihood of greater volatility of net asset value and market price of, and distributions on, the Common Shares. The Fund will pay (and Common Shareholders will bear) any costs and expenses relating to the Funds’ use of leverage, which will result in a reduction in the net asset value of the Common Shares. There can be no assurance that the Fund’s leverage strategy will be successful. Furthermore, the amount of fees paid to NFA for investment advisory services will be higher if the Fund uses leverage because the fees will be calculated based on the Fund’s Managed Assets—this may create an incentive for Nuveen Asset Management to leverage the Fund. See “Risk Factors—Leverage Risk” and “Risk Factors—Inverse Floating Rate Securities Risk.”

Inverse Floating Rate Securities Risk

The Fund may invest up to 10% of its Managed Assets in inverse floating rate securities. Typically, inverse floating rate securities represent beneficial interests in a special purpose trust (sometimes called a “tender option bond trust”) formed by a third party sponsor for the purpose of holding municipal bonds. See “Municipal Securities—Inverse Floating Rate Securities.” In general, income on inverse floating rate securities will decrease when interest rates increase and increase when interest rates decrease. Investments in inverse floating rate securities may subject the Fund to the risks of reduced or eliminated interest payments and losses of principal.

The Fund may invest in inverse floating rate securities issued by special purpose trusts that have recourse to the Fund. In Nuveen Asset Management’s discretion, the Fund may enter into a separate shortfall and forbearance agreement with the third party sponsor of a special purpose trust. The Fund may enter into such recourse agreements (i) when the liquidity provider to the special purpose trust requires such an agreement because the level of leverage in the trust exceeds the level that the liquidity provider is willing to support absent such an agreement; and/or (ii) to seek to prevent the liquidity provider from collapsing the trust in the event that

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the municipal obligation held in the trust has declined in value. Such an agreement would require the Fund to reimburse the third party sponsor of the trust, upon termination of the trust issuing the inverse floater, the difference between the liquidation value of the bonds held in the trust and the principal amount due to the holders of floating rate interests. In such instances, the Fund may be at risk of loss that exceeds its investment in the inverse floating rate securities.

Inverse floating rate securities may increase or decrease in value at a greater rate than the underlying interest rate, which effectively leverages the Fund’s investment. As a result, the market value of such securities generally will be more volatile than that of fixed rate securities.

The Fund’s investments in inverse floating rate securities issued by special purpose trusts that have recourse to the Fund may be highly leveraged. The structure and degree to which the Fund’s inverse floating rate securities are highly leveraged will vary based upon a number of factors, including the size of the trust itself and the terms of the underlying municipal security. An inverse floating rate security generally is considered highly leveraged if the principal amount of the short-term floating rate interests issued by the related special purpose trust has a three to one gearing to the principal amount of the inverse floating rate securities owned by the trust. In the event of a significant decline in the value of an underlying security, the Fund may suffer losses in excess of the amount of its investment (up to an amount equal to the value of the municipal securities underlying the inverse floating rate securities) as a result of liquidating special purpose trusts or other collateral required to maintain the Fund’s anticipated effective leverage ratio.

The Fund’s investment in inverse floating rate securities will create effective leverage. Any effective leverage achieved through the Fund’s investment in inverse floating rate securities will create an opportunity for increased Common Share net income and returns, but will also create the possibility that Common Share long-term returns will be diminished if the cost of leverage exceeds the return on the inverse floating rate securities purchased by the Fund. See “Risk Factors—Leverage Risk.”

The amount of fees paid to Nuveen Asset Management for investment advisory services will be higher if the Fund uses leverage because the fees will be calculated based on the Fund’s Managed Assets—this may create an incentive for Nuveen Asset Management to leverage the Fund. Managed Assets means the total assets of the Fund, minus the sum of its accrued liabilities (other than liabilities incurred for the express purpose of creating effective leverage). Total assets for this purpose shall include assets attributable to the Fund’s use of effective leverage (whether or not those assets are reflected in the Fund’s financial statements for purposes of generally accepted accounting principles), such as, but not limited to, the portion of assets in special purpose trusts of which the Fund owns the inverse floater certificates that has been effectively financed by the trust’s issuance of floating rate certificates.

There is no assurance that the Fund’s strategy of investing in inverse floating rate securities will be successful.

Inverse floating rate securities have varying degrees of liquidity based, among other things, upon the liquidity of the underlying securities deposited in a special purpose trust. The market price of inverse floating rate securities is more volatile than the underlying securities due to leverage. The leverage attributable to such inverse floating rate securities may be “called away” on relatively short notice and therefore may be less permanent than more traditional forms of leverage. In certain circumstances, the likelihood of an increase in the volatility of net asset value and market price of the Common Shares may be greater for a fund (like the Fund) that relies primarily on inverse floating rate securities to achieve a desired effective leverage ratio. The Fund may be required to sell its inverse floating rate securities at less than favorable prices, or liquidate other Fund portfolio holdings in certain circumstances, including, but not limited to, the following:

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Insurance Risk

The Fund may purchase municipal securities that are secured by insurance, bank credit agreements or escrow accounts. The credit quality of the companies that provide such credit enhancements will affect the value of those securities. Certain significant providers of insurance for municipal securities have recently incurred significant losses as a result of exposure to sub-prime mortgages and other lower credit quality investments that have experienced recent defaults or otherwise suffered extreme credit deterioration. As a result, such losses have reduced the insurers’ capital and called into question their continued ability to perform their obligations under such insurance if they are called upon to do so in the future. While an insured municipal security will typically be deemed to have the rating of its insurer, if the insurer of a municipal security suffers a downgrade in its credit rating or the market discounts the value of the insurance provided by the insurer, the rating of the underlying municipal security will be more relevant and the value of the municipal security would more closely, if not entirely, reflect such rating. In such a case, the value of insurance associated with a municipal security would decline and may not add any value. The insurance feature of a municipal security does not guarantee the full payment of principal and interest through the life of an insured obligation, the market value of the insured obligation or the net asset value of the Common Shares represented by such insured obligation.

Tax Risk

To qualify for the favorable U.S. federal income tax treatment generally accorded to regulated investment companies, among other things, the Fund must derive in each taxable year at least 90% of its gross income from certain prescribed sources and satisfy a diversification test on a quarterly basis. If the Fund fails to satisfy the qualifying income or diversification requirements in any taxable year, the Fund may be eligible for relief provisions if the failures are due to reasonable cause and not willful neglect and if a penalty tax is paid with respect to each failure to satisfy the applicable requirements. Additionally, relief is provided for certain de minimis failures of the diversification requirements where the Fund corrects the failure within a specified period. In order to be eligible for the relief provisions with respect to a failure to meet the diversification requirements, the Fund may be required to dispose of certain assets. If these relief provisions were not available to the Fund and it were to fail to qualify for treatment as a regulated investment company for a taxable year, all of its taxable income (including its net capital gain) would be subject to tax at regular corporate rates without any deduction for distributions to stockholders, and such distributions would be taxable as ordinary dividends to the extent of the Fund’s current and accumulated earnings and profits.

To qualify to pay exempt-interest dividends, which are treated as items of interest excludable from gross income for federal income tax purposes, at least 50% of the value of the total assets of the Fund must consist of obligations exempt from regular income tax as of the close of each quarter of the Fund’s taxable year. If the proportion of taxable investments held by the Fund exceeds 50% of the Fund’s total assets as of the close of any quarter of the Fund’s taxable year, the Fund will not satisfy the general eligibility test that permits it to pay exempt-interest dividends for the taxable year.

The value of the Fund’s investments and its net asset value may be adversely affected by changes in tax rates and policies. Because interest income from municipal securities is normally not subject to regular federal income taxation, the attractiveness of municipal securities in relation to other investment alternatives is affected by changes in federal income tax rates or changes in the tax-exempt status of interest income from municipal securities. Any proposed or actual changes in such rates or exempt status, therefore, can significantly affect the demand for and supply, liquidity and marketability of municipal securities. This could in turn affect the Fund’s net asset value and ability to acquire and dispose of municipal securities at desirable yield and price levels. Additionally, the Fund is not a suitable investment for individual retirement accounts, for other tax-exempt or tax-deferred accounts or for investors who are not sensitive to the federal income tax consequences of their investments.

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Taxability Risk

The Fund will invest in municipal securities in reliance at the time of purchase on an opinion of bond counsel to the issuer that the interest paid on those securities will be excludable from gross income for federal income tax purposes, and Nuveen Asset Management will not independently verify that opinion. Subsequent to the Fund’s acquisition of such a municipal security, however, the security may be determined to pay, or to have paid, taxable income. As a result, the treatment of dividends previously paid or to be paid by the Fund as “exempt-interest dividends” could be adversely affected, subjecting the Fund’s shareholders to increased federal income tax liabilities.

Distributions of ordinary taxable income (including any net short-term capital gain) will be taxable to shareholders as ordinary income (and not eligible for favorable taxation as “qualified dividend income”), and capital gain dividends will be subject to capital gains taxes. See “Tax Matters.”

Borrowing Risks

In addition to borrowing for leverage (See “Use of Leverage”), the Fund may borrow for temporary or emergency purposes, including to meet redemption requests, pay dividends, repurchase its shares, or clear portfolio transactions. Borrowing may exaggerate changes in the net asset value of the Fund’s shares and may affect the Fund’s net income. When the Fund borrows money, it must pay interest and other fees, which will reduce the Fund’s returns if such costs exceed the returns on the portfolio securities purchased or retained with such borrowings. Any such borrowings are intended to be temporary. However, under certain market conditions, including periods of low demand or decreased liquidity in the municipal bond market such borrowings might be outstanding for longer periods of time. The Fund will not purchase additional portfolio securities while outstanding such temporary or emergency borrowings exceed 5% of the value of its total assets.

Inflation Risk

Inflation risk is the risk that the value of assets or income from investment will be worth less in the future as inflation decreases the value of money. As inflation increases, the real value of Common Shares and the distributions can decline. In addition, during any period of rising inflation, interest rates on borrowings would likely increase, which would tend to further reduce returns to Common Shareholders.

Sector and Industry Risk

The Fund may invest up to 25% of its net assets in municipal securities in any one industry or in any one state of origin. In addition, subject to the concentration limits of the Fund’s investment policies and guidelines, the Fund may invest a significant portion of its net assets in certain sectors of the municipal securities market, such as hospitals and other health care facilities, charter schools and other private educational facilities, special taxing districts and start-up utility districts, and private activity bonds including industrial development bonds on behalf of transportation companies such as airline companies, whose credit quality and performance may be more susceptible to economic, business, political, regulatory and other developments than other sectors of municipal issuers. If the Fund invests a significant portion of its net assets in the sectors noted above, the Fund’s performance may be subject to additional risk and variability. To the extent that the Fund focuses its net assets in the hospital and healthcare facilities sector, for example, the Fund will be subject to risks associated with such sector, including adverse government regulation and reduction in reimbursement rates, as well as government approval of products and services and intense competition. Securities issued with respect to special taxing districts will be subject to various risks, including real-estate development related risks and taxpayer concentration risk. Further, the fees, special taxes or tax allocations and other revenues established to secure the obligations of securities issued with respect to special taxing districts are generally limited as to the rate or amount that may be levied or assessed and are not subject to increase pursuant to rate covenants or municipal or corporate guarantees. Charter schools and other private educational facilities are subject to various risks, including the reversal of legislation authorizing or funding charter schools, the failure to renew or secure a

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charter, the failure of a funding entity to appropriate necessary funds and competition from alternatives such as voucher programs. Issuers of municipal utility securities can be significantly affected by government regulation, financing difficulties, supply and demand of services or fuel and natural resource conservation. The transportation sector, including airports, airlines, ports and other transportation facilities, can be significantly affected by changes in the economy, fuel prices, labor relations, insurance costs and government regulation.

Special Risks Related to Certain Municipal Obligations

The Fund may invest in municipal leases and certificates of participation in such leases. Municipal leases and certificates of participation involve special risks not normally associated with general obligations or revenue bonds. Leases and installment purchase or conditional sale contracts (which normally provide for title to the leased asset to pass eventually to the governmental issuer) have evolved as a means for governmental issuers to acquire property and equipment without meeting the constitutional and statutory requirements for the issuance of debt. The debt issuance limitations are deemed to be inapplicable because of the inclusion in many leases or contracts of “non-appropriation” clauses that relieve the governmental issuer of any obligation to make future payments under the lease or contract unless money is appropriated for such purpose by the appropriate legislative body on a yearly or other periodic basis. In addition, such leases or contracts may be subject to the temporary abatement of payments in the event the governmental issuer is prevented from maintaining occupancy of the leased premises or utilizing the leased equipment. Although the obligations may be secured by the leased equipment or facilities, the disposition of the property in the event of non-appropriation or foreclosure might prove difficult, time consuming and costly, and may result in a delay in recovering or the failure to fully recover the Fund’s original investment. In the event of non-appropriation, the issuer would be in default and taking ownership of the assets may be a remedy available to the Fund, although the Fund does not anticipate that such a remedy would normally be pursued. To the extent that the Fund invests in unrated municipal leases or participates in such leases, the credit quality rating and risk of cancellation of such unrated leases will be monitored on an ongoing basis. Certificates of participation, which represent interests in unmanaged pools of municipal leases or installment contracts, involve the same risks as the underlying municipal leases. In addition, the Fund may be dependent upon the municipal authority issuing the certificates of participation to exercise remedies with respect to the underlying securities. Certificates of participation also entail a risk of default or bankruptcy, both of the issuer of the municipal lease and also the municipal agency issuing the certificate of participation.

Derivatives Risk, Including the Risk of Swaps

The Fund’s use of derivatives involves risks different from, and possibly greater than, the risks associated with investing directly in the investments underlying the derivatives. Whether the Fund’s use of derivatives is successful will depend on, among other things, if Nuveen Asset Management correctly forecasts market values, interest rates and other applicable factors. If Nuveen Asset Management incorrectly forecasts these and other factors, the investment performance of the Fund will be unfavorably affected. In addition, the derivatives market is largely unregulated. It is possible that developments in the derivatives market could adversely affect the Fund’s ability to successfully use derivative instruments.

The Fund may enter into debt-related derivatives instruments including credit swap default contracts and interest rate swaps. Like most derivative instruments, the use of swaps is a highly specialized activity that involves investment techniques and risks different from those associated with ordinary portfolio securities transactions. In addition, the use of swaps requires an understanding by Nuveen Asset Management not only of the referenced asset, rate or index, but also of the swap itself. Because they are two-party contracts and because they may have terms of greater than seven days, swap agreements may be considered to be illiquid. Moreover, the Fund bears the risk of loss of the amount expected to be received under a swap agreement in the event of the default or bankruptcy of a swap agreement counterparty. It is possible that developments in the swaps market, including potential government regulation, could adversely affect the Fund’s ability to terminate existing swap agreements or to realize amounts to be received under such agreements. The derivatives market is subject to a

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changing regulatory environment. It is possible that regulatory or other developments in the derivatives market could adversely affect the Fund’s ability to successfully use derivative instruments. See also, “Risk Factors—Counterparty Risk”, “Risk Factors—Hedging Risk” and the SAI.

Counterparty Risk

Changes in the credit quality of the companies that serve as the Fund’s counterparties with respect to derivatives, insured municipal securities or other transactions supported by another party’s credit will affect the value of those instruments. Certain entities that have served as counterparties in the markets for these transactions have recently incurred significant financial hardships including bankruptcy and losses as a result of exposure to sub-prime mortgages and other lower quality credit investments that have experienced recent defaults or otherwise suffered extreme credit deterioration. As a result, such hardships have reduced these entities’ capital and called into question their continued ability to perform their obligations under such transactions. By using such derivatives or other transactions, the Fund assumes the risk that its counterparties could experience similar financial hardships.

Hedging Risk

The Fund’s use of derivatives or other transactions to reduce risk involves costs and will be subject to Nuveen Asset Management’s ability to predict correctly changes in the relationships of such hedge instruments to the Fund’s portfolio holdings or other factors. No assurance can be given that Nuveen Asset Management’s judgment in this respect will be correct. In addition, no assurance can be given that the Fund will enter into hedging or other transactions at times or under circumstances in which it may be advisable to do so.

Deflation Risk

Deflation risk is the risk that prices throughout the economy decline over time, which may have an adverse effect on the market valuation of companies, their assets and revenues. In addition, 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.

Recent Market Conditions

The financial crisis in the U.S. and global economies over the past several years, including the European sovereign debt crisis, has resulted, and may continue to result, in an unusually high degree of volatility in the financial markets, both domestic and foreign, and in the net asset values of many investment companies, including to some extent the Fund. Conditions in the U.S. and global economies have resulted, and may continue to result, in fixed income instruments experiencing unusual liquidity issues, increased price volatility and, in some cases, credit downgrades and increased likelihood of default. The financial condition of federal, state and local governments may be sensitive to market events, which may, in turn, adversely affect the marketability of notes and bonds they issue. Recent declines in real estate prices and general business activity are reducing tax revenues of many state and local governments and could affect the economic viability of projects that are the sole source of revenue to support various municipal securities. Further, some state and local governments have been and in the future may be subject to direct ballot referenda that could limit their financial flexibility, or their ability to levy taxes or raise tax revenues, which may adversely affect the marketability of notes and bonds issued by those state and local governments. In addition, global economies and financial markets are becoming increasingly interconnected, which increases the possibilities that conditions in one country or region might adversely impact issuers in a different country or region. Because the situation is widespread and largely unprecedented, it may be unusually difficult to identify both risks and opportunities using past models of the interplay of market forces, or to predict the duration of these market conditions. The severity or duration of these conditions may also be affected by policy changes made by governments or quasi-governmental organizations. In addition, on August 5, 2011, S&P lowered its long-term sovereign credit rating on the U.S. federal government

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debt to “AA+” from “AAA.” The downgrade by S&P could increase volatility in both stock and bond markets, result in higher interest rates and higher U.S. Treasury yields and increase the costs of all kinds of debt. These events could have significant adverse effects on the economy generally.

Illiquid Securities Risk

The Fund may invest up to 15% of its Managed Assets in municipal securities and other instruments that, at the time of investment, are illiquid. Illiquid securities are securities that are not readily marketable and may include some restricted securities, which are securities that may not be resold to the public without an effective registration statement under the 1933 Act, if they are unregistered, may be sold only in a privately negotiated transaction or pursuant to an exemption from registration. Illiquid securities involve the risk that the securities will not be able to be sold at the time desired by the Fund or at prices approximating the value at which the Fund is carrying the securities on its books.

Market Disruption Risk

Certain events have a disruptive effect on the securities markets, such as terrorist attacks (including the terrorist attacks in the U.S. on September 11, 2001), war and other geopolitical events. The Fund cannot predict the effects of similar events in the future on the U.S. economy. Below investment grade securities tend to be more volatile than higher rated securities so that these events and any actions resulting from them may have a greater impact on the prices and volatility of below investment grade securities than on higher rated securities.

Impact of Offering Methods Risk

The issuance of Common Shares through the various methods described in the Prospectus may have an adverse effect on prices in the secondary market for the Fund’s Common Shares by increasing the number of Common Shares available for sale. In addition, the Common Shares may be issued at a discount to the market price for such Common Shares, which may put downward pressure on the market price for Common Shares of the Fund.

Certain Affiliations

Certain broker-dealers may be considered to be affiliated persons of the Fund, NFA and/or Nuveen Investments. 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, purchase certain adjustable rate senior loans, if applicable, 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 convert the Fund to open-end status. These provisions 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. See “Certain Provisions in the Declaration of Trust.”

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HOW THE FUND MANAGES RISK

Investment Limitations

The Fund has adopted certain investment limitations designed to limit investment risk and maintain portfolio diversification. These limitations are fundamental and may not be changed without the approval of the holders of a “majority of the outstanding” Common Shares and preferred shares, if issued in the future, voting together as a single class, and, if issued in the future, the approval of the holders of a “majority of the outstanding” preferred shares voting as a separate class. When used with respect to particular shares of the Fund, a “majority of the outstanding” shares means (i) 67% or more of the shares present at a meeting, if the holders of more than 50% of the shares are present or represented by proxy, or (ii) more than 50% of the shares, whichever is less.

The Fund may become subject to guidelines which are more limiting than the investment limitations referred to above in order to obtain and maintain ratings from Moody’s, S&P or Fitch on the preferred shares, if issued in the future, including with respect to the Fund’s hedging strategies described below. The Fund does not anticipate that such guidelines would have a material adverse effect on the Fund’s Common Shareholders or the Fund’s ability to achieve its investment objective. See “Investment Objectives” in the SAI for information about these guidelines and a complete list of the fundamental and non-fundamental investment policies of the Fund.

Quality Investments

Under normal circumstances and as a non-fundamental policy, the Fund will invest at least 80% of its Managed Assets in investment grade securities that, at the time of investment are rated within the four highest grades (Baa or BBB or better) by at least one of the NRSROs or are unrated but judged to be of comparable quality by Nuveen Asset Management.

Derivative Instruments

As previously noted, the Fund may invest in certain derivative instruments in pursuit of its investment objective. Such instruments include financial futures contracts, swap contracts (including interest rate and credit default swaps), options on financial futures, options on swap contracts, or other derivative instruments. Nuveen Asset Management may use derivative instruments to seek to enhance return, to hedge some of the risk of the Fund’s investments in municipal securities or as a substitute for a position in the underlying asset. These types of hedging strategies may generate taxable income.

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 NFA. 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 SAI.

Investment Adviser, Sub-Adviser and Portfolio Manager

Investment Adviser.     NFA, the Fund’s investment adviser, offers advisory and investment management services to a broad range of mutual funds and closed-end fund clients. NFA is responsible for the Fund’s overall investment strategy and its implementation. NFA also is responsible for managing the Fund’s business affairs and providing certain clerical, bookkeeping and other administrative services.

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NFA, 333 West Wacker Drive, Chicago, Illinois 60606, a registered investment adviser, is a wholly-owned subsidiary of Nuveen Investments, Inc. (“Nuveen Investments”). Founded in 1898, Nuveen Investments and its affiliates had approximately $220 billion of assets under management as of September 30, 2012.

Sub-adviser.     Nuveen Asset Management, 333 West Wacker Drive, Chicago, Illinois 60606, serves as the Fund’s sub-adviser, pursuant to a sub-advisory agreement between NFA and Nuveen Asset Management. Nuveen Asset Management is a registered investment adviser, and a wholly-owned subsidiary of NFA. Nuveen Asset Management oversees day-to-day investment operations of the Fund. Pursuant to the sub-advisory agreement, Nuveen Asset Management will be compensated for the services it provides to the fund with a portion of the management fee NFA receives from the Fund. NFA and Nuveen Asset Management retain the right to reallocate investment advisory responsibilities and fees between themselves in the future.

Nuveen Asset Management is responsible for the execution of specific investment strategies and day-to-day investment operations of the Fund. Nuveen Asset Management manages the funds using a team of analysts and portfolio managers that focuses on a specific group of funds. The day-to-day operation of the Fund and the execution of its specific investment strategies is the primary responsibility of Thomas Spalding, the designated portfolio manager of the Fund.

Portfolio Manager.     Thomas Spalding, CFA, is Vice President and Senior Investment Officer of Nuveen Investments and has been the portfolio manager of the Fund since 1999 (“Portfolio Manager”). He has direct investment responsibility for National Long Term funds. He joined Nuveen in 1976 as assistant portfolio manager and has been the portfolio manager of the Nuveen Municipal Value Fund, Nuveen’s first closed-end exchange traded fund, since its inception in 1987. Currently, he manages investments for 21 Nuveen-sponsored investment companies.

Additional information about the portfolio manager’s compensation, other accounts managed by the portfolio manager and the portfolio manager’s ownership of securities in the Fund is provided in the SAI. The SAI is available free of charge by calling (800) 257-8787 or by visiting the Fund’s website at www.nuveen.com. The information contained in, or that can be accessed through, the Fund’s website is not part of this Prospectus of the SAI.

Investment Management and Sub-Advisory Agreements

Investment Management Agreement.     Pursuant to an investment management agreement between NFA and the Fund, the Fund has agreed to pay an annual management fee for the services and facilities provided by NFA, payable on a monthly basis, based on the sum of a fund-level fee and a complex-level fee, as described below.

Fund-Level Fee.     The annual fund-level fee for the Fund, payable monthly, is calculated according to the following schedule:

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Complex-Level Fee.     The annual complex-level fee for the Fund, payable monthly, is calculated according to the following schedule:

A discussion regarding the basis for the Board of Trustees’ decision to renew the Investment Management Agreement for the Fund is available in the Fund’s semi-annual report to shareholders dated September 30, 2012.

Sub-Advisory Agreement.     Pursuant to an investment sub-advisory agreement between NFA and Nuveen Asset Management, Nuveen Asset Management will receive from NFA a management fee equal to 60.000% of NFA’s net management fee from the Fund.

In addition to the fee of NFA, the Fund pays all other costs and expenses of its operations, including compensation of its trustees (other than those affiliated with NFA and Nuveen Asset Management), custodian, transfer agency and dividend disbursing expenses, legal fees, expenses of independent auditors, expenses of repurchasing shares, expenses associated with any Borrowings, expenses of issuing any preferred shares, expenses of preparing, printing and distributing shareholder reports, notices, proxy statements and reports to governmental agencies, and taxes, if any. All fees and expenses are accrued daily and deducted before payment of dividends to investors.

A discussion regarding the basis for the Board of Trustees’ decision to renew the Sub-Advisory Agreement for the Fund is available in the Fund’s semi-annual report to shareholders dated September 30, 2012.

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NET ASSET VALUE

The Fund’s net asset value per share is determined as of the close of regular session trading (normally 4:00 p.m., Eastern Time) on each day the NYSE is open for business. Net asset value is calculated by taking the market value of the Fund’s total assets, including interest or dividends accrued but not yet collected, less all liabilities, and dividing by the total number of shares outstanding. The result, rounded to the nearest cent, is the net asset value per share. All valuations are subject to review by the Fund’s Board of Trustees or its delegate.

In determining net asset value, expenses are accrued and applied daily and securities and other assets for which market quotations are available are valued at market value. The prices of municipal bonds are provided by a pricing service approved by the Fund’s Board of Trustees. When market price quotes are not readily available (which is usually the case for municipal securities), the pricing service, or, in the absence of a pricing service for a particular security, the Board of Trustees of the Fund, or its designee, may establish fair market value using a wide variety of market data including yields or prices of municipal bonds of comparable quality, type of issue, coupon, maturity and rating, market quotes or indications of value from securities dealers, evaluations of anticipated cash flows or collateral, general market conditions and other information and analysis, including the obligor’s credit characteristics considered relevant by the pricing service or the Board of Trustees’ designee. Exchange-listed securities are generally valued at the last sales price on the securities exchange on which such securities are primarily traded. Securities traded on a securities exchange for which there are no transactions on a given day or securities not listed on a securities exchange are valued at the mean of the closing bid and asked prices. Securities traded on Nasdaq are valued at the Nasdaq Official Closing Price. Temporary investments in securities that have variable rate and demand features qualifying them as short-term investments are valued at amortized cost, which approximates market value. See “Net Asset Value” in the SAI for more information.

DISTRIBUTIONS

The Fund pays regular monthly cash distributions to Common Shareholders at a level rate (stated in terms of a fixed cents per Common Share dividend rate) that reflects the past and projected performance of the Fund. Distributions can only be made from net investment income after paying any accrued dividends to preferred shareholders, if any, or interest and required principal payments on borrowings.

The Fund’s ability to maintain a level dividend rate will depend on a number of factors. The net income of the Fund includes all interest income accrued on portfolio assets less all expenses of the Fund. Expenses of the Fund are accrued each day. For each year, all or substantially all the net investment income of the Fund will be distributed. At least annually, the Fund also intends to distribute substantially all of its net capital gain (which is the excess of net long-term capital gain over net short-term capital loss) and ordinary taxable income, if any, after paying any accrued dividends or making any liquidation payments to preferred shareholders, if any, and interest and required principal payments on borrowings. Although it does not now intend to do so, the Board of Trustees may change the Fund’s dividend policy and the amount or timing of the distributions, based on a number of factors, including the amount of the Fund’s undistributed net investment income and historical and projected investment income and the amount of the expenses and dividend rates on the outstanding preferred shares, if any, and expenses and interest on borrowings.

The Fund might not distribute all or a portion of any net capital gain for a taxable year. If the Fund does not distribute all of its net capital gain for a taxable year, it will pay federal income tax on the retained gain. As provided under federal tax law, Common Shareholders of record as of the end of the Fund’s taxable year will include their attributable share of the retained net capital gain in their income for the year as a long-term capital gain (regardless of their holding period in the Common Shares), will be deemed to have paid their proportionate shares of tax paid by the Fund, and will be entitled to income tax credits or refunds for the tax deemed paid on their behalf by the Fund. The Fund will treat the retained capital gains as a substitute for equivalent cash distributions. The Fund may make total distributions during a given calendar year in an amount that exceeds the Fund’s net investment income and net capital gain for that calendar year, in which case the excess would generally be treated by Common Stockholders as a return of capital for tax purposes.

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The Fund reserves the right to change its distribution policy and the basis for establishing the rate of its monthly distributions at any time.

DIVIDEND REINVESTMENT PLAN

If your Common Shares are registered directly with the Fund or if you hold your Common Shares with a brokerage firm that participates in the Fund’s Dividend Reinvestment Plan (“Plan”), you may elect to have all dividends, including any capital gain dividends, on your Common Shares automatically reinvested by the Plan Agent (defined below) in additional Common Shares under the Plan. You may elect to participate in the Plan by contacting Nuveen Investor Services at (800) 257-8787. If you do not participate, you will receive all distributions in cash paid by check mailed directly to you or your brokerage firm by State Street Bank and Trust Company as dividend paying agent (“Plan Agent”).

If you decide to participate in the Plan, the number of Common Shares you will receive will be determined as follows:

(1) If Common Shares are trading at or above net asset value at the time of valuation, the Fund will issue new shares at the then current market price;

(2) If Common Shares are trading below net asset value at the time of valuation, the Plan Agent will receive the dividend or distribution in cash and will purchase Common Shares in the open market, on the NYSE or elsewhere, for the participants’ accounts. It is possible that the market price for the Common Shares may increase before the Plan Agent has completed its purchases. Therefore, the average purchase price per share paid by the Plan Agent may exceed the market price at the time of valuation, resulting in the purchase of fewer shares than if the dividend or distribution had been paid in Common Shares issued by the Fund. The Plan Agent will use all dividends and distributions received in cash to purchase Common Shares in the open market within 30 days of the valuation date. Interest will not be paid on any uninvested cash payments; or

(3) If the Plan Agent begins purchasing Fund shares on the open market while shares are trading below net asset value, but the Fund’s shares subsequently trade at or above their net asset value before the Plan Agent is able to complete its purchases, the Plan Agent may cease open-market purchases and may invest the uninvested portion of the distribution in newly-issued Fund shares at a price equal to the greater of the shares’ net asset value or 95% of the shares’ market value.

You may withdraw from the Plan at any time by giving written notice to the Plan Agent. If you withdraw or the Plan is terminated, you will receive whole shares in your account under the Plan and you will receive a cash payment for any fraction of a share in your account. If you wish, the Plan Agent will sell your shares and send you the proceeds, minus brokerage commissions and a $2.50 service fee.

The Plan Agent maintains all shareholders’ accounts in the Plan and gives written confirmation of all transactions in the accounts, including information you may need for tax records. Upon a repurchase of your shares, the Fund (or its administrative agent) may be required to report to the IRS and furnish to you cost basis and holding period information for Fund shares that you purchased on or after January 1, 2012 (“covered shares”).

For shares of the Fund held in the Plan, you are permitted to elect from among several permitted cost basis methods. In the absence of an election, the Plan will use first-in first-out (“FIFO”) methodology for tracking and reporting your cost basis on covered shares as its default cost basis method. The cost basis method you use may not be changed with respect to a repurchase of shares after the settlement date of the repurchase. You should consult with your tax advisors to determine the best permitted cost basis method for your tax situation and to obtain more information about how the new cost basis reporting rules apply to you.

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Common Shares in your account will be held by the Plan Agent in non-certificated form. Any proxy you receive will include all Common Shares you have received under the Plan.

There is no brokerage charge for reinvestment of your dividends or distributions in Common Shares. However, all participants will pay a pro rata share of brokerage commissions incurred by the Plan Agent when it makes open market purchases.

Automatically reinvesting dividends and distributions does not mean that you do not have to pay income taxes due upon receiving dividends and distributions.

If you hold your Common Shares with a brokerage firm that does not participate in the Plan, you will not be able to participate in the Plan and any dividend reinvestment may be effected on different terms than those described above. Consult your financial advisor for more information.

The Fund reserves the right to amend or terminate the Plan if in the judgment of the Board of Trustees the change is warranted. There is no direct service charge to participants in the Plan; however, the Fund reserves the right to amend the Plan to include a service charge payable by the participants. Additional information about the Plan may be obtained by writing to State Street Bank and Trust Company, Attn: ComputerShare Nuveen Investments, P.O. Box 43071, Providence, Rhode Island 02940-3071 or by calling (800) 257-8787.

PLAN OF DISTRIBUTION

The Fund may sell the Common Shares offered under this Prospectus through

The Fund will bear the expenses of the Offering, including but not limited to, the expenses of preparation of the Prospectus and SAI for the Offering and the expense of counsel and auditors of in connection with the Offering.

Distribution Through At-the-Market Transactions

The Fund has entered into a Distribution Agreement with Nuveen Securities, a form of which has been filed as an exhibit to the Registration Statement of which this Prospectus is a part. The summary of the Distribution Agreement contained herein is qualified by reference to the Distribution Agreement. Subject to the terms and conditions of the Distribution Agreement, the Fund may from time to time offer its Common Shares through Nuveen Securities to certain broker-dealers which have entered into selected dealer agreements with Nuveen Securities. Currently, Nuveen Securities has entered into a selected dealer agreement with UBS pursuant to which UBS will be acting as Nuveen Securities’ sub-placement agent with respect to at-the-market offerings of Common Shares.

Common Shares will only be sold on such days as shall be agreed to by the Fund and Nuveen Securities. Common Shares will be sold at market prices, which shall be determined with reference to trades on the Exchange, subject to a minimum price to be established each day by the Fund. The minimum price on any day will not be less than the current net asset value per Common Share plus the per share amount of the commission to be paid to Nuveen Securities. The Fund and Nuveen Securities will suspend the sale of Common Shares if the per share price of the shares is less than the minimum price.

The Fund will compensate Nuveen Securities with respect to sales of the Common Shares at a commission rate of 1% of the gross proceeds of the Sale of Common Shares. Nuveen Securities will compensate broker-

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dealers participating in the offering at a rate of 0.8% of the gross proceeds of the Sale of Common Shares sold by that broker-dealer. Nuveen Securities may from time to time change the dealer re-allowance. Settlements of sales of Common Shares will occur on the third business day following the date on which any such sales are made.

In connection with the sale of the Common Shares on behalf of the Fund, Nuveen Securities may be deemed to be an underwriter within the meaning of the 1933 Act, and the compensation of Nuveen Securities may be deemed to be underwriting commissions or discounts. Unless otherwise indicated in a further Prospectus supplement, Nuveen Securities will act as underwriter on a reasonable efforts basis.

The offering of Common Shares pursuant to the Distribution Agreement will terminate upon the earlier of (i) the sale of all Common Shares subject thereto or (ii) termination of the Distribution Agreement. The Fund and Nuveen Securities each have the right to terminate the Distribution Agreement in its discretion at any time.

The Fund currently intends to distribute the shares offered pursuant to this Prospectus primarily through at-the-market transactions, although from time to time it may also distribute shares through an underwriting syndicate or a privately negotiated transaction. To the extent shares are distributed other than through at-the-market transactions, the Fund will file a supplement to this Prospectus describing such transactions.

The Fund’s closing price on the NYSE on December 7, 2012 was $15.72.

UBS, its affiliates and their respective employees hold or may hold in the future, directly or indirectly, investment interests in Nuveen Investments, Inc. and its funds. The interests held by employees of UBS or its affiliates are not attributable to, and no investment discretion is held by, UBS or its affiliates.

Distribution Through Underwriting Syndicates

The Fund from time to time may issue additional Common Shares through a syndicated secondary offering. In order to limit the impact on the market price of the Fund’s Common Shares, underwriters will market and price the offering on an expedited basis ( e.g. , overnight or similarly abbreviated offering period). The Fund will launch a syndicated offering on a day, and upon terms, mutually agreed upon between the Fund, Nuveen Securities, one of the Fund’s underwriters, and the underwriting syndicate.

The Fund will offer its shares at a price equal to a specified discount of up to 5% from the closing market price of the Fund’s Common Shares on the day prior to the offering date. The applicable discount will be negotiated by the Fund and Nuveen Securities in consultation with the underwriting syndicate on a transaction-by-transaction basis. The Fund will compensate the underwriting syndicate out of the proceeds of the offering based upon a sales load of up to 4% of the gross proceeds of the sale of Common Shares. The minimum net proceeds per share to the Fund will not be less than the greater of (i) the Fund’s latest net asset value per Common Share or (ii) 91% of the closing market price of the Fund’s Common Shares on the day prior to the offering date.

Distribution Through Privately Negotiated Transactions

The Fund, through Nuveen Securities, from time to time may sell directly to, and solicit offers from, institutional and other sophisticated investors , who may be deemed to be underwriters as defined in the 1933 Act for any resale of Common Shares.

The terms of such privately negotiated transactions will be subject to the discretion of the management of the Fund. In determining whether to sell Common Shares through a privately negotiated transaction, the Fund will consider relevant factors including, but not limited to, the attractiveness of obtaining additional funds through the sale of Common Shares, the purchase price to apply to any such sale of Common Shares and the person seeking to purchase the Common Shares.

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Common Shares issued by the Fund through privately negotiated transactions will be issued at a price equal to the greater of (i) the net asset value per Common Share of the Fund’s Common Shares or (ii) at a discount ranging from 0% to 5% of the average daily closing market price of the Fund’s Common Shares at the close of business on the two business days preceding the date upon which Common Shares are sold pursuant to the privately negotiated transaction. The applicable discount will be determined by the Fund on a transaction-by-transaction basis.

The principal business address of Nuveen Securities is 333 West Wacker Drive, Chicago, Illinois 60606.

DESCRIPTION OF SHARES

Common Shares

The Declaration authorizes the issuance of an unlimited number of Common Shares. The Common Shares being offered have a par value of $0.01 per share and, subject to the rights of holders of preferred shares, if issued, and borrowings, if incurred, have equal rights to the payment of dividends and the distribution of assets upon liquidation. The Common Shares being offered will, when issued, be fully paid and, subject to matters discussed in “Certain Provisions in the Declaration of Trust,” non-assessable, and will have no pre-emptive or conversion rights or rights to cumulative voting. Each Common Share has one vote with respect to matters upon which a shareholder vote is required, consistent with the requirements of the 1940 Act and the rules promulgated thereunder, and will vote together as a single class. Whenever the Fund incurs borrowings and/or preferred shares are outstanding, Common Shareholders will not be entitled to receive any cash distributions from the Fund unless all interest on such borrowings has been paid and all accrued dividends on preferred shares have been paid, unless asset coverage (as defined in the 1940 Act) with respect to any borrowings would be at least 300% after giving effect to the distributions and asset coverage (as defined in the 1940 Act) with respect to preferred shares would be at least 200% after giving effect to the distributions. See “—Preferred Shares” below.

The Common Shares are listed on the NYSE and trade under the ticker symbol “NXP.” The Fund intends to hold annual meetings of shareholders so long as the Common Shares are listed on a national securities exchange and such meetings are required as a condition to such listing. The Fund will not issue share certificates.

Unlike open-end funds, closed-end funds like the Fund do not provide daily redemptions. Rather, if a shareholder determines to buy additional Common Shares or sell shares already held, the shareholder may conveniently do so by trading on the exchange through a broker or otherwise. Shares of closed-end investment companies may frequently trade on an exchange at prices lower than net asset value. Shares of closed-end investment companies like the Fund have during some periods traded at prices higher than net asset value and have during other periods traded at prices lower than net asset value.

Because the market value of the Common Shares may be influenced by such factors as distribution levels (which are in turn affected by expenses), call protection, dividend stability, portfolio credit quality, net asset value, relative demand for and supply of such shares in the market, general market and economic conditions, and other factors beyond the control of the Fund, the Fund cannot assure you that Common Shares will trade at a price equal to or higher than net asset value in the future. 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 “Repurchase of Fund Shares; Conversion to Open-End Fund.”

Borrowings

The Declaration authorizes the Fund, without approval of the Common Shareholders, to borrow money. In this connection, the Fund may issue notes or other evidence of indebtedness (including bank borrowings or commercial paper) and may secure any such borrowings by mortgaging, pledging or otherwise subjecting as security the Fund’s assets. The Fund expects to borrow money at rates generally available to institutional

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investors. In connection with such Borrowings, the Fund may be required to maintain minimum average balances with the lender or to pay a commitment or other fee to maintain a line of credit. Any such requirements will increase the cost of any such borrowings over the stated interest rate. Under the requirements of the 1940 Act, the Fund, immediately after any such Borrowings, must have an “asset coverage” of at least 300%. With respect to any such borrowings, asset coverage means the ratio that the value of the total assets of the Fund, less all liabilities and indebtedness not represented by senior securities (as defined in the 1940 Act), bears to the aggregate amount of such borrowings represented by senior securities issued by the Fund. Certain types of borrowings may result in the Fund being subject to covenants in credit agreements relating to asset coverages or portfolio coverages or otherwise. In addition, as with the issuance of preferred shares, certain types of borrowings may result in the Fund being subject to certain restrictions imposed by guidelines of one or more rating agencies that may issue ratings for commercial paper or notes issued by the Fund. Such restrictions may be more stringent than those imposed by the 1940 Act.

The rights of lenders to the Fund to receive interest on and repayment of principal of any such borrowings will be senior to those of the Common Shareholders, and the terms of any such borrowings may contain provisions which limit certain activities of the Fund, including the payment of dividends to Common Shareholders in certain circumstances. Further, the 1940 Act does (in certain circumstances) grant to the lenders to the Fund certain voting rights in the event of default in the payment of interest on or repayment of principal. In the event that such provisions would impair the Fund’s eligibility for treatment as a regulated investment company under the Internal Revenue Code of 1986, as amended (the “Code”), the Fund will attempt to repay or restructure the borrowings to preserve that eligibility. Any borrowings will likely be ranked senior or equal to all other existing and future borrowings of the Fund. The Fund may also borrow up to an additional 5% of its total assets for temporary purposes. The Fund may also borrow money for repurchase of its shares or as a temporary measure for extraordinary or emergency situations. See “Investment Restrictions” in the SAI.

Preferred Shares

The Declaration authorizes the issuance of an unlimited number of preferred shares in one or more classes or series, with rights as determined by the Board of Trustees, by action of the Board of Trustees without the approval of the Common Shareholders. The Fund does not currently have any preferred shares outstanding. The Fund may issue preferred shares in the future to increase the Fund’s leverage.

Limited Issuance of Preferred Shares.     Under the 1940 Act, the Fund could issue preferred shares with an aggregate liquidation value of up to one-half of the value of the Fund’s total net assets, including any liabilities associated with borrowings, measured immediately after issuance of the preferred shares. “Liquidation value” means the original purchase price of the shares being liquidated plus any accrued and unpaid dividends. In addition, the Fund is not permitted to declare any cash dividend or other distribution on its Common Shares unless the liquidation value of the preferred shares is less than one-half of the value of the Fund’s total net assets (determined after deducting the amount of such dividend or distribution) immediately after the distribution.

Distribution Preference.     If issued in the future, the preferred shares would have complete priority over the Common Shares as to distribution of assets.

Liquidation Preference.     In the event of any voluntary or involuntary liquidation, dissolution or winding up of the affairs of the Fund, holders of preferred shares, if issued in the future, would be entitled to receive a preferential liquidating distribution (expected to equal the original purchase price per share plus accumulated and unpaid dividends thereon, whether or not earned or declared) before any distribution of assets is made to Common Shareholders.

Voting Rights.     Preferred shares are required to be voting shares and to have equal voting rights with Common Shares. Except as otherwise indicated in this Prospectus or the SAI and except as otherwise required by applicable law, holders of preferred shares, if issued in the future, would vote together with Common Shareholders as a single class.

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Holders of preferred shares, if issued in the future, voting as a separate class, would be entitled to elect two of the Fund’s trustees (following the establishment of the Fund by an initial trustee, the Declaration provides for a total of no less than two and no more than 15 trustees). The remaining trustees would be elected by Common Shareholders and holders of preferred shares, if issued in the future, voting together as a single class. In the unlikely event that two full years of accrued dividends are unpaid on the preferred shares, if issued in the future, the holders of all outstanding preferred shares, if issued in the future, voting as a separate class, would be entitled to elect a majority of the Fund’s trustees until all dividends in arrears have been paid or declared and set apart for payment. In order for the Fund to take certain actions or enter into certain transactions, a separate class vote of holders of preferred shares, if issued in the future, would be required, in addition to the single class vote of the holders of preferred shares, if issued in the future, and Common Shares. See “Certain Provisions in the Declaration of Trust” and the SAI under “Description of Shares—Preferred Shares—Voting Rights.”

Redemption, Purchase and Sale of Preferred Shares.     The terms of the preferred shares, if issued in the future, would provide that they may be redeemed by the issuer at certain times, in whole or in part, at the original purchase price per share plus accumulated dividends. Any redemption or purchase of preferred shares, if issued in the future, by the Fund will reduce the leverage applicable to Common Shares, while any issuance of shares by the Fund would increase such leverage.

CERTAIN PROVISIONS IN THE DECLARATION OF TRUST

Under Massachusetts law, shareholders could, under 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.

The 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. Specifically, the Declaration requires a vote by holders of at least two-thirds of the Common Shares and preferred shares, if issued in the future, voting together as a single class, except as described below, to authorize (1) a conversion of the Fund from a closed-end to an open-end investment company, (2) a merger or consolidation of the Fund, or a series or class of the Fund, with any corporation, association, trust or other organization or a reorganization of the Fund, or a series or class of the Fund, (3) a sale, lease or transfer of all or substantially all of the Fund’s assets (other than in the regular course of the Fund’s investment activities), (4) in certain circumstances, a termination of the Fund, or a series or class of the Fund, or (5) a removal of trustees by shareholders (except at the end of a trustee’s term), and then only for cause ¹ , unless, with respect to (1) through (4), such transaction has already been authorized by the affirmative vote of two-thirds of the total number of trustees fixed in accordance with the Declaration or the By-Laws, in which case the affirmative vote of the holders of at least a majority of the Fund’s Common Shares and preferred shares, if issued in the future, outstanding at the time, voting together as a single class, is required; provided, however, that where only a particular class or series is affected (or, in the case of removing a trustee, when the trustee has been elected by only one class), only the required vote by the applicable class or series will be required. Approval of shareholders is not required, however, for any transaction, whether deemed a merger, consolidation, reorganization or otherwise whereby the Fund issues shares in connection with the acquisition of assets (including those subject to liabilities) from any other investment company or similar entity. In the case of the conversion of the Fund to an open-end investment company, or in the case of any of the foregoing transactions constituting a plan of reorganization which adversely affects the holders of preferred shares, if issued

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in the future, the action in question will also require the affirmative vote of the holders of at least two-thirds of the Fund’s preferred shares, if issued in the future, outstanding at the time, voting as a separate class, or, if such action has been authorized by the affirmative vote of two-thirds of the total number of trustees fixed in accordance with the Declaration or the By-Laws, the affirmative vote of the holders of at least a majority of the Fund’s preferred shares, if issued in the future, outstanding at the time, voting as a separate class. None of the foregoing provisions may be amended except by the vote of at least two-thirds of the Common Shares and preferred shares, if issued in the future, voting together as a single class. The votes required to approve the conversion of the Fund from a closed-end to an open-end investment company or to approve transactions constituting a plan of reorganization which adversely affects the holders of preferred shares, if issued in the future, are higher than those required by the 1940 Act. The Board of Trustees is divided into three classes, such a staggered board could delay for up to two years the replacement of a majority of the Board of Trustees. The Board of Trustees believes that the provisions of the Declaration relating to such higher votes are in the best interest of the Fund and its shareholders. See the SAI under “Certain Provisions in the Declaration of Trust.”

The provisions of the Declaration 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 overall effect of these provisions is to render more difficult the accomplishment of a merger or the assumption of control by a third party. They 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 objective and policies. 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 Common Shareholders.

Reference should be made to the Declaration on file with the SEC for the full text of these provisions.

REPURCHASE OF FUND 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 several factors, including dividend levels (which are in turn affected by expenses), net asset value, call protection, dividend stability, portfolio credit quality, relative demand for and supply of such shares in the market, general market and economic conditions and other factors. Because shares of closed-end investment companies may frequently trade at prices lower than net asset value, the Fund’s Board of Trustees has currently determined that, at least annually, it will consider action that might be taken to reduce or eliminate any material discount from net asset value in respect of Common Shares, which may include the repurchase of such shares in the open market or in private transactions, the making of a tender offer for such shares at net asset value, 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 any of these actions, or that share repurchases or tender offers will actually reduce market discount.

If the Fund converted to an open-end investment company, it would be required to redeem all preferred shares then outstanding, if any (requiring in turn that it liquidate a portion of its investment portfolio), and the Common Shares 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. See the SAI under “Certain Provisions in the Declaration of Trust” for a discussion of the voting requirements applicable to the conversion of the Fund to an open-end investment company.

Before deciding whether to take any action if the Common Shares trade below net asset value, the Board would consider all relevant factors, including the extent and duration of the discount, the liquidity of the Fund’s

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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 Fund’s 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 SAI under “Repurchase of Fund Shares; Conversion to Open-End Fund” for a further discussion of possible action to reduce or eliminate such discount to net asset value. On November 16, 2011, the Fund’s Board of Trustees approved an open market share repurchase program under which the Fund may repurchase up to 10% of its Common Shares. To date, the Fund has not repurchased any Common Shares under the program.

TAX MATTERS

The following information is meant as a general summary for U.S. shareholders. Please see the SAI for additional information. Investors should rely on their own tax adviser for advice about the particular federal, state and local tax consequences to them of investing in the Fund.

The Fund intends to elect to be treated and to qualify each year as a regulated investment company (“RIC”) under Subchapter M of the Code. In order to qualify for treatment as a RIC, the Fund must satisfy certain requirements regarding the sources of its income, the diversification of its assets and the distribution of its income. As a RIC, the Fund is not expected to be subject to federal income tax. The Fund primarily invests in municipal securities (as defined above) issued by states, cities and local authorities and certain possessions and territories of the United States (such as Puerto Rico or Guam) or municipal securities whose income is otherwise exempt from regular federal income taxes. Substantially all of the Fund’s dividends paid to you are expected to qualify as “exempt-interest dividends.” A shareholder treats an exempt-interest dividend as interest on state and local bonds exempt from regular federal income tax. Federal income tax law imposes an alternative minimum tax with respect to corporations, individuals, trust and estates. Interest on certain municipal securities, such as certain private activity bonds, is included as an item of tax preference in determining the amount of a taxpayer’s alternative minimum taxable income. If the Fund receives income from such municipal securities, a portion of the dividends paid by the Fund, although exempt from regular federal income tax, will be taxable to shareholders whose tax liabilities are determined under the federal alternative minimum tax. The Fund will annually provide a report indicating the percentage of the Fund’s income attributable to municipal securities and the percentage includable in federal alternative minimum taxable income. Corporations are subject to special rules in calculating their federal alternative minimum taxable income with respect to interest from municipal securities.

In addition to exempt-interest dividends, the Fund may also distribute to its shareholders amounts that are treated as long-term capital gain or ordinary income (which may include short-term capital gains). These distributions are generally subject to regular federal income tax, whether or not reinvested in additional shares. Capital gain distributions are generally taxable at rates applicable to long-term capital gains regardless of how long a shareholder has held its shares. Long-term capital gains are currently taxable at a maximum rate of 15%. Absent further legislation, the maximum 15% rate on long-term capital gains will increase to 20% for taxable years beginning after December 31, 2012. The Fund does not expect that any part of its distributions to shareholders from its investments will qualify for the dividends-received deduction available to corporate shareholders or as “qualified dividend income,” which for taxable years beginning on or before December 31, 2012 is taxable to noncorporate shareholders at a maximum 15% U.S. federal income tax rate.

For taxable years beginning after December 31, 2012, a 3.8% Medicare contribution tax will generally apply to all or a portion of the net investment income of a shareholder who is an individual and not a nonresident alien for federal income tax purposes and who has adjusted gross income (subject to certain adjustments) that exceeds a threshold amount ($250,000 if married filing jointly or if considered a “surviving spouse” for federal income tax purposes, $125,000 if married filing separately, and $200,000 in other cases). This 3.8% tax will also apply to all or a portion of the undistributed net investment income of certain shareholders that are estates and trusts. For these purposes, interest, dividends and certain capital gains will generally be taken into account in computing a shareholder’s net investment income, but exempt-interest dividends will not be taken into account.

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As a regulated investment company, the Fund will not be subject to federal income tax in any taxable year provided that it meets certain distribution requirements. As described in “Distributions” above, the Fund might not distribute some (or all) of its net capital gain. If the Fund does not distribute all of its net capital gain and net investment income, it will be subject to tax at regular corporate rates on the amount retained. If the Fund retains any net capital gain, it may designate the retained amount as undistributed capital gains in a notice to its shareholders who, if subject to federal income tax on long-term capital gains, (i) will be required to include in income for federal income tax purposes, as long-term capital gain, their share of such undistributed amount; (ii) will be deemed to have paid their proportionate shares of the tax paid by the Fund on such undistributed amount and will be entitled to credit that amount of tax against their federal income tax liabilities, if any; and (iii) will be entitled to claim refunds to the extent the credit exceeds such liabilities. For federal income tax purposes, the tax basis of shares owned by a shareholder of the Fund will be increased by an amount equal to the difference between the amount of undistributed capital gains included in the shareholder’s gross income and the tax deemed paid by the shareholder.

Dividends declared by the Fund in October, November or December, payable to shareholders of record in such a month, and paid during the following January will be treated as having been received by shareholders in the year the distributions were declared.

Each shareholder will receive an annual statement summarizing the shareholder’s dividend and capital gains distributions.

The repurchase, sale or exchange of Common Shares normally will result in capital gain or loss to holders of Common Shares who hold their shares as capital assets. Generally a shareholder’s gain or loss will be long-term capital gain or loss if the shares have been held for more than one year even though the increase in value in such Common Shares may be at least partly attributable to tax-exempt interest income. Present law taxes both long-term and short-term capital gains of corporations at the rates applicable to ordinary income. For non-corporate taxpayers, however, long-term capital gains are currently taxed at a maximum rate of 15%, while short-term capital gains and other ordinary income are currently taxed at ordinary income rates. As noted above, absent further legislation, the current rates applicable to long-term capital gains will cease to apply to taxable years beginning after December 31, 2012 and the maximum rate on long-term capital gains will increase to 20%. If a shareholder sells or otherwise disposes of Common Shares before holding them for six months, any loss on the sale or disposition will be treated as a long-term capital loss to the extent of any amounts treated as distributions to the common shareholder of long-term capital gain (including any amount credited to the common shareholder as undistributed capital gain). Any loss realized on a sale or exchange of shares of the Fund will be disallowed to the extent those shares of the Fund are replaced by substantially identical shares of the Fund (including shares acquired by reason of participation in the Plan) within a period of 61 days beginning 30 days before and ending 30 days after the date of disposition of the original shares. In that event, the basis of the replacement shares of the Fund will be adjusted to reflect the disallowed loss.

Any interest on indebtedness incurred or continued to purchase or carry the Fund’s shares to which exempt-interest dividends are allocated is not deductible. Under certain applicable rules, the purchase or ownership of shares may be considered to have been made with borrowed funds even though such funds are not directly used for the purchase or ownership of the shares. In addition, if you receive social security or certain railroad retirement benefits, you may be subject to U.S. federal income tax on a portion of such benefits as a result of receiving investment income, including exempt-interest dividends and other distributions paid by the Fund.

The Fund may be required to withhold (as “backup withholding”) U.S. federal income tax from distributions (including exempt-interest dividends) and repurchase proceeds payable to a shareholder if the shareholder fails to provide the Fund with his or her correct taxpayer identification number or to make required certifications, or if the shareholder has been notified by the IRS that he or she is subject to backup withholding. The backup withholding rate is currently 28% and is scheduled to increase to 31% in 2013. Backup withholding is not an additional tax; rather, it is a way in which the IRS ensures it will collect taxes otherwise due. Any amounts withheld may be credited against a shareholder’s U.S. federal income tax liability.

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CUSTODIAN AND TRANSFER AGENT

The custodian of the assets of the Fund is State Street Bank and Trust Company, One Lincoln Street, Boston, Massachusetts 02110. The Custodian performs custodial, fund accounting and portfolio accounting services. The Fund’s transfer, shareholder services and dividend paying agent is also State Street Bank and Trust Company (“Transfer Agent”). The Transfer Agent is located at 250 Royall Street, Canton, Massachusetts 02021.

INDEPENDENT REGISTERED PUBLIC ACCOUNTING FIRM

Ernst & Young LLP, an independent registered public accounting firm, provides auditing services to the Fund. The principal business address of Ernst & Young LLP is 155 North Wacker Drive, Chicago, Illinois 60606.

LEGAL OPINION

Certain legal matters in connection with the Common Shares will be passed upon for the Fund by Bingham McCutchen LLP, Washington, D.C.

AVAILABLE INFORMATION

The Fund is subject to the informational requirements of the Securities Exchange Act of 1934, as amended (the “Exchange Act”) and the 1940 Act and is required to file reports, proxy statements and other information with the SEC. These documents can be inspected and copied for a fee at the SEC’s public reference room, 100 F Street, NE, Washington, D.C. 20549, and Northeast Regional Office, Woolworth Building, 233 Broadway, New York, New York 10013-2409. Reports, proxy statements, and other information about the Fund can be inspected at the offices of the NYSE.

This Prospectus does not contain all of the information in the Fund’s Registration Statement, including amendments, exhibits, and schedules. Statements in this Prospectus about the contents of any contract or other document are not necessarily complete and in each instance reference is made to the copy of the contract or other document filed as an exhibit to the Registration Statement, each such statement being qualified in all respects by this reference.

Additional information about the Fund and Common Shares can be found in the Fund’s Registration Statement (including amendments, exhibits, and schedules) on Form N-2 filed with the SEC. The SEC maintains a web site (http://www.sec.gov) that contains the Fund’s Registration Statement, other documents incorporated by reference, and other information the Fund has filed electronically with the SEC, including proxy statements and reports file under the Exchange Act.

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