As filed with the Securities and Exchange Commission on June 1, 2010

Securities Act registration no. 33-19228
Investment Company Act file no. 811-05443

 

 

SECURITIES AND EXCHANGE COMMISSION

Washington, D.C. 20549

FORM N-1A

þ		REGISTRATION STATEMENT UNDER THE SECURITIES ACT OF 1933 POST-EFFECTIVE AMENDMENT NO. 73

and

þ		REGISTRATION STATEMENT UNDER THE INVESTMENT COMPANY ACT OF 1940 AMENDMENT NO. 76

Approximate Date of Proposed Public Offering: As soon as practicable following the effectiveness of the Registration Statement.

It is proposed that this filing will become effective:

           þ    immediately upon filing pursuant to paragraph (b) of rule 485

           o    on March 1, 2009 pursuant to paragraph (b) of rule 485

           o    60 days after filing pursuant to paragraph (a)(1) of rule 485

           o    on                      pursuant to paragraph (a)(1) of rule 485

           o    75 days after filing pursuant to paragraph (a)(2) of rule 485

           o    on                      pursuant to paragraph (a)(2) of rule 485

If appropriate, check the following box:

o

This post-effective amendment designates a new effective date for a previously filed post-effective amendment.

Amending Parts A, B and C, and filing exhibits

 

 

 

Table of Contents

 

 

Calamos Discovery Growth Fund

 

 

 

 

taxable account. These costs, which are not reflected in the annual fund operating expenses or in the example, affect the Fund’s performance.

 

 

 

 

 

Buying and Redeeming Fund Shares

Minimum Initial Investment

Classes A and C: $2,500/$500 for IRA

 

Minimum Additional Investment

Classes A and C: $50

 

To Place Orders

Please contact your intermediary, or place your order directly:
Mail:
U.S. Bancorp Fund Services, LLC
P.O. Box 701
Milwaukee, WI 53201
Phone: 800.582.6959

 

Class B shares may only be purchased by existing investors through the reinvestment of dividends and/or capital gain distributions in Class B shares of the Fund or by exchange of existing Class B shares held in another Fund.

 

Transaction Policies

The Fund’s shares are redeemable. In general, investors may purchase, redeem, or exchange Fund shares on any business day by written request (to the address noted above), by wire transfer, by telephone (at the number noted above), or through a financial intermediary. Orders to buy and redeem shares are processed at the next net asset value (share price or “NAV”) to be calculated only on days when the New York Stock Exchange is open for regular trading.

 

Tax Information

The Fund’s distributions may be taxable as ordinary income or capital gains, except when your investment is in an IRA, 401(k) or other tax-advantaged investment plan.

 

Payments to Broker-Dealers and Other Financial Intermediaries

If you purchase shares of the Fund through a broker-dealer or other financial intermediary (such as a bank), the Fund and its related companies may pay the intermediary for the sale of Fund shares and related services. These payments may create a conflict of interest by influencing the broker-dealer or other intermediary and your salesperson to recommend the Fund over another investment. Ask your salesperson or visit your financial intermediary’s website for more information.

 

Additional Information About Investment Strategies and Related Risks

 

What are the investment objectives and principal strategies of the Fund?

When buying and selling growth-oriented securities, the investment adviser focuses on the company’s earnings growth potential coupled with financial strength and stability. In addition, the Fund’s investment adviser focuses on individual stock selection (referred to as a “bottom-up approach”) and quantitative research.

 

In seeking to meet the Fund’s investment objective, the Fund’s investment adviser utilizes highly disciplined institutional management strategies designed to help enhance investment returns while managing risk. As part of these strategies, an in-depth proprietary analysis is employed on an issuing company and its securities. At the portfolio level, risk management tools are also used, such as diversification across companies, sectors and industries to achieve a risk-reward profile suitable for the Fund’s objectives.

 

The Fund’s investment objective may not be changed without the approval of a “majority of the outstanding” shares of the Fund, as defined in the Investment Company Act of 1940. There can be no assurance that the Fund will achieve its objective.

 

Principal Risks of Investing in the Fund

This prospectus describes the risks you may face as an investor in the Fund. It is important to keep in mind that generally, investments with a higher potential reward also have a higher risk of losing money. The reverse is also commonly true: the lower the risk, the lower the potential reward. However, as you consider an investment in the Fund, you should also take into account your tolerance for the daily fluctuations of the financial markets and whether you can afford to leave your money in this investment for a long period of time to ride out down periods.

 

As with any security, there are market and investment risks associated with your investment in the Fund. The value of your investment will fluctuate over time, and it is possible to lose money.

 

In response to market, economic, political, or other conditions, the Fund may temporarily use a different investment strategy for defensive purposes. If the Fund does so, different factors could affect the Fund’s performance, and the Fund may not achieve its investment objective.

 

Additional information regarding the principal risks of investing in the Fund is included below.

 

Market Risk. The risk that the securities markets will increase or decrease in value is considered market risk and applies to any security. If there is a general decline in the stock or fixed-income market, it is possible your investment may lose value regardless of the individual results of the companies in which a Fund invests.

 

Market Disruption Risk. Certain events have a disruptive effect on securities markets, including but not limited to, terrorist attacks, war and other geopolitical events or catastrophes. The Fund’s investment adviser, Calamos Advisors , cannot predict the effect of similar events in the future on the U.S. or foreign economies. Certain securities such as high yield and equity securities tend to be impacted more by these events than other types of securities in terms of price and volatility.

 

Recent Market Events. Over the last several years, domestic and international markets have experienced acute turmoil. This turmoil resulted in unusual and extreme volatility in the equity and debt markets, in the prices of individual securities and in the world economy. In addition, many governments throughout the world responded to the turmoil with a variety of significant fiscal and monetary policy changes, including but not limited to, direct capital infusions into companies, new monetary programs and dramatically lower interest rates. An unexpected or quick reversal of these policies could increase the volatility in the equity and debt markets. These market conditions and continuing economic risks add significantly to the risk of short-term volatility in the Fund.

 

Investment Management Risk. Whether the Fund achieves its investment objective(s) is significantly impacted by whether Calamos Advisors is able to choose suitable investments for the Fund.

 

Equity Investments Risk. Equity investments are subject to greater fluctuations in market value than other asset classes as a result of such factors as a company’s business performance, investor perceptions, stock market trends and general economic conditions.

 

 

Growth Stock Risk. Growth securities experience relatively rapid earnings growth and typically trade at higher multiples of current earnings than other securities. Therefore, growth securities may be more sensitive to changes in current or expected earnings than other securities. Growth securities also may be more volatile because growth companies usually invest a high portion of earnings in their business, and they may lack the dividends of value stocks that can lessen the decreases in stock prices in a falling market. A company may never achieve the earnings expansion the Fund anticipates.

 

Mid-Sized Company Risk. Mid-sized company stocks have historically been subject to greater investment risk than large company stocks. The risks generally associated with these companies include more limited product lines, markets and financial resources, lack of management depth or experience, dependency on key personnel, and vulnerability to adverse market and economic developments. Accordingly, the prices of mid-sized company stocks tend to be more volatile than prices of large company stocks.

 

Small Company Risk. Small company stocks have historically been subject to greater investment risk than mid-sized and large company stocks. The risks generally associated with small companies include more limited product lines, markets and financial resources, lack of management depth or experience, dependency on key personnel, and vulnerability to adverse market and economic developments. Accordingly, the prices of small company stocks tend to be more volatile than prices of mid-sized and large company stocks. Further, the prices of small company stocks are often adversely affected by limited trading volumes and the lack of publicly available information.

 

Securities Lending Risk. The Fund may lend its portfolio securities to broker-dealers and banks in order to generate additional income for the Fund. Any such loan must be continuously secured by collateral in cash or cash equivalents maintained on a current basis in an amount at least equal to the market value of the securities loaned by the Fund. In the event of bankruptcy or other default of a borrower of portfolio securities, the Fund could experience both delays in liquidating the loan collateral or recovering the loaned securities and losses, including (a) possible decline in the value of the collateral or in the value of the securities loaned during the period while the Fund seeks to enforce its rights thereto, (b) possible subnormal levels of income and lack of access to income during this period, and (c) expenses of enforcing its rights. In an effort to reduce these risks, the Fund’s securities lending agent monitors, and reports to Calamos Advisors on, the creditworthiness of the firms to which the Fund lends securities. The Fund may also experience losses as a result of a diminution in value of its cash collateral investments.

 

Foreign Securities Risk. There are special risks associated with investing in foreign securities that are not typically associated with investing in U.S. companies. These risks include fluctuations in the exchange rates of foreign currencies that may affect the U.S. dollar value of a security, and the possibility of substantial price volatility as a result of political and economic instability in the foreign country. Other risks of investing in foreign securities include: less public information about issuers of securities, different securities regulation, different accounting, auditing and financial reporting standards and less liquidity in foreign markets than in U.S. markets.

 

Portfolio security holdings disclosure

A description of the Fund’s policies and procedures in connection with the disclosure of portfolio security holdings of the Fund is available in the statement of additional information and on the Fund’s website, www.calamos.com.

 

Fund Facts

 

Who manages the Fund?

The Fund’s investments are managed by Calamos Advisors LLC , 2020 Calamos Court, Naperville, IL. Calamos Advisors is an indirect subsidiary of Calamos Asset Management, Inc. , whose voting shares are majority-owned by Calamos Family Partners, Inc. , which is controlled by John P. Calamos, Sr. and the Calamos family.

 

Subject to the overall authority of the board of trustees, Calamos Advisors provides continuous investment supervision and management to the Fund under a management agreement and also furnishes office space, equipment and management personnel. For these services, the Fund pays Calamos Advisors a fee based on its average daily net assets, which is accrued daily and paid on a monthly basis at the annual rate of 1.00%.

 

Calamos Advisors has contractually agreed to limit the annual ordinary operating expenses of the Fund, as a percentage of the average net assets of the particular class of shares, to 1.50% for Class A shares, 2.25% for Class B shares and 2.25% for Class C shares. For purposes of this agreement, operating expenses do not include dividend expense on short positions. This agreement is binding on Calamos Advisors through June 30, 2011.

 

On March 26, 2010, the board of trustees unanimously approved the management agreement for the Fund. A discussion regarding the basis for the approval by the board of trustees of the management agreement for the Fund will be included in the Fund’s annual report to shareholders for the period ended October 31, 2010.

 

Team Approach to Management. Calamos Advisors employs a team approach to portfolio management, led by the Co-CIOs and comprised generally of the Co-CIOs, directors, senior strategy analysts, intermediate analysts and junior analysts. The Co-CIOs, directors and senior strategy analysts are supported by and lead a team of investment professionals whose valuable contributions create a synergy of expertise that can be applied across many different investment strategies.

 

Portfolio holdings are reviewed and trading activity is discussed on a regular basis by team members. Team members, including the Co-CIOs and senior strategy analysts, may each make trading decisions guided by the Fund’s investment objective and strategy.

 

While day-to-day management of the Fund is a team effort, the Co-CIOs, along with the senior strategy analysts, have joint primary and supervisory responsibility for the Fund and work with all team members in developing and executing the Fund’s investment program. Each is further identified below.

 

John P. Calamos, Sr. and Nick P. Calamos, Co-CIOs of Calamos Advisors, generally focus on firmwide risk management and the top-down approach of diversification by country and industry sector and macro-level investment themes. Nick P. Calamos, Co-CIO of Calamos Advisors, also focuses on portfolio level risk management, sector and country weightings, bottom-up fundamental security analysis, and corresponding research and analysis for key holdings. As Co-CIOs, Messrs, John P. Calamos, Sr. and Nick P. Calamos direct the team’s focus on macro themes, upon which the portfolio’s strategy is based. The team, as a whole, implements the investment strategies, under the general direction and supervision of the Co-CIOs and the senior strategy analysts. John P. Calamos, Jr., Jeff Scudieri, Jon Vacko, John Hillenbrand, Steve Klouda, Bryan Lloyd, Dino Dussias, Christopher Hartman and Joe Wysocki are each senior strategy analysts.

 

During the past five years, John P. Calamos, Sr. has been President and Trustee of the Trust and chairman, CEO and Co-CIO of Calamos Advisors and its predecessor company, and Nick P. Calamos has been Vice President and Trustee of the Trust (through June 2006) and Senior Executive Vice President and Co-CIO of Calamos Advisors and its predecessor company. John P. Calamos, Jr., Executive Vice President of Calamos Advisors , joined the firm in 1985 and has held various senior investment positions since that time. Jeff Scudieri joined Calamos Advisors in 1997 and has been a senior strategy analyst since September 2002. Jon Vacko joined Calamos Advisors in 2000 and has been a senior strategy analyst since July 2002. John Hillenbrand joined Calamos Advisors in 2002 and has been a senior strategy analyst since August 2002. Steve Klouda joined Calamos Advisors in 1994 and has been a senior strategy analyst since July 2002. Bryan Lloyd joined Calamos Advisors in October 2003 and has been a senior strategy analyst since June 2006. Dino Dussias joined Calamos Advisors in October 1995 and has been a senior strategy analyst since April 2007. Christopher Hartman joined Calamos Advisors in February 1997 and has been a senior strategy analyst since May 2007. Joe Wysocki joined Calamos Advisors in October 2003 and has been a senior strategy analyst since February 2007.

 

 

The Fund’s statement of additional information provides additional information about the team leaders, including other accounts they manage, their ownership in the Calamos Family of Funds and their compensation.

 

What classes of shares does the Fund offer?

This prospectus offers three classes of shares of each Fund: Class A and Class C shares and in limited circumstances, Class B shares. Class I shares and Class R shares, which have different expense structures, are offered by a separate prospectus. The Fund does not accept purchases of Class B shares from new or existing investors, except from existing investors through Qualifying Transactions (as defined above). The different classes of Fund shares are investments in the same portfolio of securities, but each class of shares has different expenses and will likely have different NAVs. The main differences between Class A, Class B and Class C shares lie primarily in their initial and contingent deferred sales charge structures and their distribution fees. Class A shares generally bear an initial sales charge at the time of purchase, while Class B and Class C shares generally bear a contingent deferred sales charge at the time of redemption. All three share classes bear distribution and/or service fees.

 

Class A shares

The offering price for Class A shares is the NAV per share plus an initial sales charge. The maximum sales charge is 4.75% of the offering price. The sales charge varies depending on the amount of your purchase, as follows:

 

		SALES CHARGE
		AS A % OF				AS A % OF
		NET AMOUNT				OFFERING
		INVESTED				PRICE
Less than $50,000			4.99	%			4.75	%
$50,000 but less than $100,000			4.44				4.25
$100,000 but less than $250,000			3.63				3.50
$250,000 but less than $500,000			2.56				2.50
$500,000 but less than $1,000,000			2.04				2.00
$1,000,000 or more*			None				None

*		Redemption of shares may be subject to a contingent deferred sales charge as discussed below.

 

Class A shares also have a 0.25% distribution (12b-1) fee. See “Distribution and service (Rule 12b-1) plan” for more information about distribution fees.

 

How can I reduce sales charges for Class A purchases?

As the table above shows, the larger your investment, the lower your initial sales charge on Class A shares. Each investment threshold that qualifies for a lower sales charge is known as a “breakpoint.” You may be able to qualify for a breakpoint on the basis of a single purchase or by aggregating the amounts of more than one purchase in the following ways:

 

Rights of accumulation

You may combine the value at the current public offering price of Class A, B and C shares of any Funds within the Calamos Family of Funds already owned and Fidelity Prime Money Market Fund Shares (discussed below) previously purchased by exchanging from Calamos Fund shares with a new purchase of Class A shares of the Fund to reduce the sales charge on the new purchase. The sales charge for the new shares will be figured at the rate in the table above that applies to the combined value of your current and new investment.

 

Statement of intention

Under a letter of intent, you may purchase additional Class A shares of the Fund over a 13-month period and receive the same sales charge as if you had purchased all the shares at once. A letter of intent does not obligate you to purchase or sell additional Class A shares. See the statement of additional information for more information about letters of intent.

 

 

$1,000,000 purchase order

You may purchase the Fund’s Class A shares at the NAV without a sales charge provided that the total amount invested in Class A shares of all Funds within the Calamos Family of Funds totals at least $1,000,000. Shares purchased at NAV in an account with a value of $1,000,000 may incur a contingent deferred sales charge of 0.50% if sold within two years after purchase, excluding shares purchased from the reinvestment of dividends or capital gains distributions. See “Contingent deferred sales charges” for more information about contingent deferred sales charges.

 

What accounts are eligible for reduced sales charges on Class A shares?

You may aggregate your eligible accounts with the eligible accounts of members of your immediate family to obtain a breakpoint discount. The types of eligible accounts that may be aggregated to obtain the breakpoint discounts described above include:

 

 

For the purpose of obtaining a breakpoint discount, members of your “immediate family” include your spouse, child, stepchild, parent, stepparent, sibling, grandchild and grandparent, in each case including in-law and adoptive relationships. In addition, a fiduciary can count all shares purchased for a trust, estate or other fiduciary account (including one or more employee benefit plans of the same employer) that has multiple accounts. Eligible accounts include those registered in the name of your financial intermediary through which you own Calamos Family of Funds shares.

 

Who may purchase Class A shares without a sales charge?

Any of the following investors may purchase Class A shares of the Fund at NAV, with no initial sales charge:

 

(a) any investor buying shares through a wrap account or other investment program whereby the investor pays the investment professional directly for services;

 

(b) any investor buying Class A shares by exchanging Class A shares of another Fund in the Calamos Family of Funds or Fidelity Prime Money Market Fund Shares, if purchases of those shares have previously incurred a sales charge (see “Money market fund” below);

 

(c) any trust created under a pension, profit sharing or other employee benefit plan (including qualified and non-qualified deferred compensation plans), where such plan has at least $1,000,000 in assets or 100 employees, or where the administrator for such plan acts as the administrator for qualified employee benefit plans with assets of at least $1,000,000;

 

(d) any company exchanging shares with a Fund pursuant to a merger, acquisition or exchange offer;

 

(e) any investor or intermediary platform on behalf of investors, including any investment company, that has entered into an investment advisory agreement or other written arrangements with Calamos Advisors or its affiliates;

 

(f) any insurance company separate account;

 

(g) any current or retired trustee of the Trust, or other registered investment company where Calamos Advisors acts as the sole investment adviser; or any associated trust, person, profit sharing or other benefit plan of such current or retired trustee;

 

(h) any employee of Calamos Financial Services LLC (“CFS”), the Funds’ distributor, its affiliates or an entity with a selling group agreement with CFS and its employees; and

 

(i) any member of the immediate family of a person qualifying under (g) or (h), including a spouse, child, stepchild, parent, stepparent, sibling, grandchild and grandparent, in each case including in-law and adoptive relationships.

 

Proceeds of Class A shares redeemed from the Fund within the previous 60 days may be reinvested in Class A shares of the Fund at NAV without a sales charge.

 

How do I obtain a breakpoint discount or purchase Class A shares without a sales charge?

The steps to obtain a breakpoint discount depend on how your account is maintained with the Calamos Family of Funds. To obtain any of the breakpoint discounts described above, you must notify us or your financial advisor at the time you purchase shares of each eligible account you or a member of your immediate family maintains. For example, if an initial investment that was less

 

 

than $1,000,000 grows to over $1,000,000, you must tell us or your financial advisor that you qualify to purchase Class A shares without an initial sales charge when you make a subsequent investment. If you do not let us or your financial advisor know of all of the holdings or planned purchases that make you eligible for a reduction, you may not receive a discount to which you are otherwise entitled. If you make your investment through a financial advisor, it is solely your financial advisor’s responsibility to ensure that you receive discounts for which you are eligible, and the Fund is not responsible for a financial advisor’s failure to apply the eligible discount to your account. You may be asked by us or your financial advisor for account statements or other records to verify your discount eligibility, including, where applicable, records for accounts opened with a different financial advisor and records of accounts established by members of your immediate family. If you own shares exclusively through an account maintained with the Fund’s transfer agent, you will need to provide the foregoing information to us at the time you purchase shares. Additional information regarding sales loads and discounts applicable to us may be found in the Fund’s statement of additional information, which can be obtained on Calamos Advisors’ website at www.calamos.com.

 

Exchange for Class I shares

Holders of Class A shares issued by Fund may exchange their Class A shares for Class I shares provided that they: (1) hold their shares through an institution that has a valid Class I sales agreement with CFS authorizing such an exchange; and (2) are eligible to invest in Class I shares in accordance with the criteria set forth in the Class I shares prospectus. Any such exchange is subject to the Fund’s discretion to accept or reject the exchange. No sales charges or other charges will apply to any such exchange, including any contingent deferred sales charge that would otherwise apply to the redemption within two years of purchase of Class A shares originally purchased at net asset value pursuant to the $1,000,000 purchase order privilege. For federal income tax purposes, a same-Fund exchange will not result in the recognition by the investor of a capital gain or loss. Class A shareholders should contact their financial institution for information on the availability of Class I shares, and should read and consider the Class I shares prospectus before any such exchange.

 

Class B shares

The Fund no does not accept purchases of Class B shares from new or existing investors, except from existing investors through Qualifying Transactions (as defined above).

 

Any purchase request for the Fund’s Class B shares will be rejected (other than through a Qualifying Transaction that is an exchange transaction).

 

Shareholders who own Class B shares of the Fund may purchase Class A or Class C shares of the Fund without regard to the normal initial investment minimum for such shares. Those purchases will be subject to any applicable sales load. As described above under “Rights of accumulation,” for purposes of determining the applicable sales load, the value of an investor’s account will be deemed to include the value of all applicable shares in eligible accounts, including a Class B share account.

 

The offering price for Class B shares is the NAV per share with no initial sales charge. However, the Fund pays an aggregate distribution and service fee at the annual rate of 1.00% of average net assets. As a result, the annual expenses for Class B shares are somewhat higher compared to Class A shares, which pay an aggregate 0.25% distribution fee. After eight years, measured from the first day of the month in which you purchased the shares, Class B shares automatically convert to Class A shares, which means lower annual expenses from the ninth year on.

 

 

Class B shares have a contingent deferred sales charge that declines over the years you own shares, and terminates completely after six years of ownership, measured from the first day of the month in which the shares were purchased. For any shares you sell within those six years, you may be charged at the following rates:

 

 

No order for Class B shares of the Fund may exceed $100,000.

 

Class C shares

The offering price for Class C shares is the NAV per share with no initial sales charge. However, the Fund pays an aggregate distribution and service fee at the annual rate of 1.00% of average net assets. As a result, the annual expenses for Class C shares are somewhat higher compared to Class A shares, which pay an aggregate 0.25% distribution fee.

 

Class C shares have a contingent deferred sales charge of 1.00% for any shares redeemed within one year of purchase, measured from the first day of the month in which the shares were purchased. Class C shares have a lower contingent deferred sales charge than Class B shares, but Class C shares DO NOT convert to Class A shares. No order for Class C shares of the Fund may exceed $1,000,000.

 

Money market fund

If you wish to exchange your Fund shares for shares of a money market fund, you may exchange them for shares of the Fidelity Institutional Money Market-Prime Money Market Portfolio (“Fidelity Prime Money Market Fund Shares”). Class A, Class B and Class C shares of the Fund may be exchanged for Class III, Class IV and Class IV Fidelity Prime Money Market Fund Shares, respectively.

 

Fidelity Prime Money Market Fund Shares are offered by a separate prospectus and are not offered by the Funds. You may at any time exchange your Fidelity Prime Money Market Fund Shares back into shares of the equivalent class of the Calamos Family Of Funds . However, should you redeem (and not exchange) your Fidelity Prime Money Market Fund Shares, you would pay any applicable contingent deferred sales charge. For a prospectus and more complete information on Fidelity Prime Money Market Fund Shares, including management fees and expenses, please call 800.582.6959. Please read the prospectus relating to Fidelity Prime Money Market Fund Shares carefully.

 

Distribution and service (Rule 12b-1) plan

The Fund has a Distribution and Service Plan or “12b-1 Plan.” Under the plan, Class A shares pay a distribution and/or service fee at the annual rate of 0.25% of the average daily net assets of the class. Class B and Class C shares pay a service fee at the annual rate of 0.25% and a distribution fee at the rate of 0.75%. The distribution fees are for the sale of Fund shares, and the service fees are for services provided to shareholders. Since the Fund’s assets are used to pay 12b-1 fees on an ongoing basis, over time those fees will increase the cost of your investment and may cost you more than other types of sales charges. Consequently, long-term shareholders of Class C shares eventually may pay more than the economic equivalent of the maximum initial charges permitted by the Financial Industry Regulatory Authority (“FINRA”). For more information about the 12b-1 Plan, please see the Fund’s statement of additional information.

 

Contingent deferred sales charge

Any contingent deferred sales charge on redemptions of Class B and Class C shares is based on the lesser of the redemption price or purchase price of the Fund shares. For purposes of determining a contingent deferred sales charge, Fund shares are

 

 

considered sold on a first-in, first-out basis. The contingent deferred sales charge may be waived under certain circumstances. See the statement of additional information for more information about the contingent deferred sales charge.

 

Which class of shares should I purchase?

The decision as to which class of shares you should purchase depends on a number of factors, including the amount and intended length of your investment. An investor making an investment that qualifies for reduced sales charges might consider Class A shares. An investor who prefers not to pay an initial sales charge, but who plans to redeem the shares within eight years might consider Class C shares. For more information about the three share classes, consult your financial advisor or call us toll free at 800.582.6959. Please note that financial services firms may receive different compensation depending upon which class of shares they sell.

 

What is the minimum amount I can invest in the Fund?

The minimum initial investment for Class A shares and Class C shares of the Fund is $2,500 per Fund account. For certain qualified retirement plans, such as individual retirement accounts, the minimum initial investment is $500 per Fund account. The minimum subsequent investment in the Fund is $50 per Fund account. The Fund may not waive or reduce the minimum initial or subsequent investment requirement, except for any omnibus account or fees-based program of any financial intermediary with whom Calamos Advisors has entered into an agreement, including, without limitation, profit sharing or pension plans, Section 401(k) plans and Section 403(b)(7) plans in the case of employees of public school systems and certain non-profit organizations. Shareholders who own Class B shares of the Fund may purchase Class A or Class C shares of the Fund without regard to the normal initial investment minimum for such shares.

 

How can I buy shares?

You may buy shares of the Fund by contacting us, your financial advisor or the broker-dealer that gave you this prospectus. Your financial advisor or another intermediary may charge for its services. You may purchase shares from us directly without any additional charges other than those described above. When you buy shares, be sure to specify whether you want Class A, Class B or Class C shares.

 

The offering price for shares will be based on the NAV per share next computed after receipt by the Fund’s transfer agent of your purchase order in good form on any day the New York Stock Exchange (the “NYSE”) is open for trading. Generally, if you place your order by 4:00 p.m. Eastern time, you will receive that day’s offering price. Orders placed after 4:00 p.m. Eastern time will receive the following business day’s offering price.

 

We generally do not sell Fund shares to investors residing outside the U.S., Puerto Rico, Guam and the U.S. Virgin Islands, even if they are U.S. citizens or lawful permanent residents of the U.S. We will sell shares to investors residing outside the U.S. if they have U.S. military APO or FPO addresses.

 

Each purchase of shares is confirmed by a written statement mailed to the shareholder, without issuance of share certificates. You may buy shares using the following methods:

 

By mail

You may purchase shares of the Fund by sending a check payable to the Calamos Family of Funds , along with a completed account application to the Fund’s transfer agent: U.S. Bancorp Fund Services, LLC, P.O. Box 701, Milwaukee, WI 53201. A subsequent investment may be made by detaching the stub from your account statement and sending it with your check in the envelope provided with your statement. All checks must be drawn on a U.S. bank in U.S. funds. The Fund will not accept cashier’s checks in amounts less than $10,000. To prevent check fraud, the Fund will not accept Treasury checks, credit card checks, traveler’s checks, starter checks or checks written by third parties for the purchase of shares. The Fund also will not accept money orders, post-dated checks, post-dated online bill pay checks, or conditional orders for the purchase of shares. A $25 charge will be imposed if any payment submitted for investment is returned, and the investor may be responsible for any loss sustained by the Fund. If you purchase shares by check or by electronic funds transfer via the Automatic Clearing House (“ACH”) Network, and redeem them shortly thereafter, payment may be delayed until the transfer agent is reasonably assured that the check or purchase by ACH has been collected, which may take 15 days.

 

 

By telephone

Once you have established an account, you may make subsequent purchases of $50 or more over the telephone by debiting your bank account. To electronically debit your bank account, you must hold your account at a financial institution that is an ACH member. The Fund will initiate most electronic transfers from your bank account to pay for the share purchase within that same business day. If your order is received prior to generally 4 p.m. Eastern time, your shares will be purchased at the next applicable price calculated on the day your order is placed. To permit telephone purchases, you must authorize telephone purchases on your account application. Call us at 800.582.6959 to purchase shares by telephone or to obtain an account application with the telephone purchase option. If you did not authorize telephone purchases on your original account application, you may request telephone purchases by submitting a request to the Fund’s transfer agent, in writing along with a voided check, at U.S. Bancorp Fund Services, LLC, P.O. Box 701, Milwaukee, WI 53201.

 

The Fund may modify or terminate the ability to purchase shares by telephone at any time, or from time to time, without notice to shareholders. If your order to purchase shares of the Fund is canceled because your electronic transfer does not clear, you will be charged a $25 service fee, and you will be responsible for any resulting loss incurred by the Fund. The Fund and its transfer agent will be liable for losses resulting from unauthorized telephone purchases only if the Fund does not follow reasonable procedures designed to verify the identity of the caller. You should immediately verify your trade confirmations when you receive them.

 

By wire

You may purchase shares by wiring funds from your bank. To open an account by wire, a completed account application is required before your wire can be accepted. You may mail or deliver by overnight mail your account application to the transfer agent. Upon receipt of your completed application, the transfer agent will establish an account for you. Your bank must include the name of the Fund you are purchasing, your account number, and your name so that monies can be correctly applied. Your bank should transmit funds by wire to:

 

U.S. Bank, N.A.

777 East Wisconsin Avenue

Milwaukee, WI 53202

ABA #075000022

 

Credit:

U.S. Bancorp Fund Services, LLC

Account #112-952-137

 

Further Credit:

(name of Fund to be purchased)

(account registration)

(account number)

 

Before sending any wire, please advise the transfer agent of your intent to wire funds. This will ensure prompt and accurate credit upon receipt of your wire. Neither the Fund nor the transfer agent is responsible for delays in the Federal Reserve wire system.

 

By exchange

You may exchange Class A shares of the Fund for Class A shares of another Fund in the Calamos Family of Funds with no sales charge, if you have previously paid a sales charge on the shares you are exchanging. You may exchange Class B shares and Class C shares of the Fund for Class B shares and Class C shares, respectively, of another Fund in the Calamos Family of Funds with no sales charge, and the time period for the contingent deferred sales charge will continue to run. You may exchange Class III Fidelity Prime Money Market Fund Shares for Class A shares of a Fund without paying a sales charge, if you have previously paid a sales charge on the shares you are exchanging. In addition, you may exchange Class B shares and Class C shares of the Fund for Class IV Fidelity Prime Money Market Fund Shares with no sales charge, and the time period for the contingent deferred sales charge will continue to run. See “Money market fund” above.

 

 

The registration of the account to which you are making an exchange must be exactly the same as that of the account from which the exchange is made, and the amount you exchange must meet any applicable minimum investment of the Fund being purchased. You may exchange your shares by writing to us at the Calamos Family of Funds , c/o U.S. Bancorp Fund Services, LLC, P.O. Box 701, Milwaukee, WI 53201. If you have authorized telephone exchange on your account application, you may also exchange your shares by calling us at 800.582.6959. An exchange may also be made by instructing your financial advisor, who will communicate your instruction to us. An exchange transaction generally is considered a sale and purchase of shares for federal income tax purposes and may result in capital gain or loss.

 

The exchange privilege is not intended as a vehicle for short-term or excessive trading. Excessive or short-term exchange activity may interfere with portfolio management and have an adverse effect on all shareholders. Accordingly, the Fund may suspend or permanently terminate the exchange privileges of any investor who appears to be engaged in short-term or excessive trading.

 

Although an investor may be precluded from utilizing the exchange privilege, an investor’s ability to redeem shares of the Fund for cash will not be affected.

 

By Automatic Investment Plan

If you own shares of the Fund, you may purchase additional shares of the Fund periodically through the Automatic Investment Plan. Under the Plan, after your initial investment, you may authorize the Fund to withdraw from your bank checking or savings account an amount that you wish to invest, which must be $50 or more. Your financial institution must be a member of the ACH Network to participate. If you wish to enroll in this Plan, complete the appropriate application form. To obtain the form, call 800.582.6959. The Plan is not available to clients of financial advisors that offer similar investment services. The Fund may terminate or modify this privilege at any time. You may change your withdrawal amount or terminate your participation in the Plan at any time by notifying us by telephone or in writing at least five business days prior to the effective date of the next transaction. A request to change bank information for this Plan may require a signature guarantee. A $25 charge will be imposed if your bank rejects your payment.

 

How can I sell (redeem) shares?

You may redeem shares of the Fund by contacting us or your intermediary. Your intermediary may charge for its services. For shares held direct only, you may redeem shares from us directly without any additional charges other than those described below.

 

Once your instruction to sell shares of the Fund has been received, you may not cancel or revoke your request. It is, therefore, very important that you call us if you have any questions about the requirements for selling shares before submitting your request.

 

Through your broker-dealer (certain charges may apply)

Shares held for you in your broker-dealer’s name must be sold through the broker-dealer.

 

By writing to the Fund’s transfer agent

When your shares are held for you by the Fund’s transfer agent, you may sell your shares by sending a written request to: U.S. Bancorp Fund Services, LLC, P.O. Box 701, Milwaukee, WI 53201. Your redemption request must:

 

 

In the case of shares held by a corporation, the redemption request must be signed in the name of the corporation by an officer whose title must be stated, and a certified bylaw provision or resolution of the board of directors authorizing the officer to so act may be required. In the case of a trust or partnership, the signature must include the name of the registered shareholder and the

 

 

title of the person signing on its behalf. Under certain circumstances, before shares can be redeemed, additional documents may be required in order to verify the authority of the person seeking to redeem.

 

By telephone

Unless telephone redemption was declined on your account application, you may redeem your shares by telephone and have proceeds sent by check to your address of record. With the telephone redemption option, you may sell up to $50,000 worth of shares on any day. You may not redeem by telephone shares held in an IRA account or in an account for which you have changed the address within the preceding 30 days.

 

If you want redemption proceeds sent to your bank account by either wire transfer (at a current cost of $15 per transfer), or electronic funds transfer via the ACH Network at no cost, you must have selected these alternate payment types on the application. If you have authorized telephone redemptions on your original account application, but would like to change the predetermined bank to which proceeds are sent, please submit your request in writing with a signature guarantee, along with a voided check for the new bank account. Only member banks may transmit funds via the ACH network.

 

If you declined telephone redemptions on your original account application, you may request the telephone redemption privilege at a later date by submitting a request in writing, which may require a signature guarantee. Please send your request along with a voided check to have proceeds deposited directly into your bank account to U.S. Bancorp Fund Services, LLC, P. O. Box 701, Milwaukee, WI 53201.

 

To redeem shares from your account by telephone, call 800.582.6959. To reduce the risk of fraudulent instruction and to ensure that instructions communicated by telephone are genuine, the Fund will send your redemption proceeds only to the address or bank/brokerage account as shown on their records. The Funds also may record a call, request more information and send written confirmation of telephone transactions. The Fund and its transfer agent will be liable for losses from unauthorized telephone instructions only if the Fund does not follow reasonable procedures designed to verify the identity of the caller. Please verify the accuracy of each telephone transaction as soon as you receive your confirmation statement.

 

During periods of volatile economic and market conditions, you may have difficulty making a redemption request by telephone, in which case you should make your redemption request in writing.

 

By wire

Broker-dealers or other sales agents may communicate redemption orders by wire to the Fund’s transfer agent. There is no limit on redemption proceeds sent by wire.

 

By systematic withdrawal plan

Under the Fund’s Systematic Withdrawal Plan, you may request that the Fund periodically redeem shares having a specified redemption value and send you a check for the proceeds. In order to initiate the Systematic Withdrawal Plan, call 800.582.6959 and request a systematic withdrawal form. Your account must have a share balance of $25,000 or more. Withdrawal proceeds are likely to exceed dividends and distributions paid on shares in your account and therefore may deplete and eventually exhaust your account. The periodic payments are redemption proceeds and are taxable as such. The maximum annual rate at which Class B shares (and Class C shares in their first year following purchase and Class A shares purchased at NAV pursuant to the $1,000,000 purchase order privilege for two years after the time of purchase) may be redeemed under the Systematic Withdrawal Plan is 10% of the NAV of the account. Because a sales charge is imposed on purchases of Fund shares, you should not purchase shares while participating in the Systematic Withdrawal Plan. You may modify or terminate your Systematic Withdrawal Plan by written notice to the transfer agent at least seven business days prior to the start of the month in which the change is to be effective. You may have a check sent to your address of record or you may have proceeds sent to your predetermined bank account via electronic funds transfer through the ACH Network (which may require a signature guarantee).

 

By exchange

You may redeem all or any portion of your shares of the Fund and use the proceeds to purchase shares of any of the other Funds in the Calamos Family of Funds or Fidelity Prime Money Market Fund Shares if your signed, properly completed application

 

 

is on file. An exchange transaction generally is considered a sale and purchase of shares for federal income tax purposes and may result in capital gain or loss. See “How can I buy shares? — By exchange” for more information about the exchange privilege.

 

Signature guarantees

A signature guarantee is required to redeem shares in the following situations:

 

 

In addition to the situations described above, the Fund and the Fund’s transfer agent reserve the right to require a signature guarantee in other instances based on the circumstances relative to the particular situation.

 

You can obtain a signature guarantee from domestic banks, brokers, dealers including CFS, credit unions, national securities exchanges, registered securities associations, clearing agencies and savings associations, as well as from participants in the New York Stock Exchange Medallion Signature Program and the Securities Transfer Agents Medallion Program (“STAMP”). A notary public is not an acceptable signature guarantor.

 

Redemption-in-kind

Shares normally will be redeemed for cash, although the Fund retains the right to redeem some or all of its shares in-kind under unusual circumstances, in order to protect the interests of remaining shareholders, or to accommodate a request by a particular shareholder that does not adversely affect the interest of the remaining shareholders, by delivery of securities selected from its assets at its discretion. However, the Fund is required to redeem shares solely for cash up to the lesser of $250,000 or 1% of the NAV of the Fund during any 90-day period for any one shareholder. Should redemptions by any shareholder exceed such limitation, the Fund will have the option of redeeming the excess in cash or in-kind. In-kind payment means payment will be made in liquid portfolio securities rather than cash. If that occurs, the redeeming shareholder might incur brokerage and/or other transaction costs to convert the securities to cash.

 

Processing time

The Fund will send your redemption proceeds to you by check to the address of record or by wire to a predetermined bank or brokerage account. Redemption proceeds paid by wire will normally be sent on the next business day after receipt of the redemption request. The cost of the wire (currently $15) will be deducted from the redemption proceeds if you are redeeming all of your shares or only a specific number of shares. If you are redeeming a specific dollar amount, the wire fee will be deducted from the remaining balance in the account. You may also have proceeds sent directly to a predetermined bank or brokerage account via electronic funds transfer through the ACH Network if your bank or brokerage firm is an ACH member. There is no charge for an electronic funds transfer through the ACH Network and your proceeds will be credited to your account within two to three business days.

 

Proceeds from the sale of Fund shares will not be sent to you until the check or ACH purchase used to purchase the shares has cleared, which can take up to 15 days after purchase. You may avoid this delay by buying shares with a wire transfer. The Fund may suspend the right of redemption under certain extraordinary circumstances in accordance with the rules of the Securities and Exchange Commission.

 

 

Small accounts

Due to the relatively high cost of handling small accounts, the Fund may give you 30 days written notice that it intends to redeem your shares, at the NAV of those shares, if your account has a value of less than $500. This would not apply if your account value declined to less than $500 as a result of market fluctuations.

 

Transaction information

Share price

The Fund’s share price, or NAV, is determined as of the close of regular session trading on the NYSE (normally 4:00 p.m. Eastern Time) each day that the NYSE is open. The NYSE is regularly closed on New Year’s Day, the third Mondays in January and February, Good Friday, the last Monday in May, Independence Day, Labor Day, Thanksgiving and Christmas.

 

The NAV per share for each class of Fund shares is calculated by dividing the pro rata share of the value of all of the securities and other assets of the Fund allocable to that class of Fund shares, less the liabilities allocable to that class, by the number of shares of the class outstanding. When shares are purchased or sold, the order is processed at the next NAV (plus any applicable sales charge) that is calculated on a day when the NYSE is open for trading, after receiving a purchase or sale order. Because the Fund may invest in securities that are primarily listed on foreign exchanges and trade on days when the Fund does not price its shares, the Fund’s NAV may change on days when shareholders will not be able to purchase or redeem the Fund’s shares. If shares are purchased or sold through an intermediary, it is the responsibility of that intermediary to transmit those orders to the Fund’s transfer agent so such orders will be received in a timely manner.

 

A purchase or sale order typically is accepted when the Fund’s transfer agent or an intermediary has received a completed application or appropriate instruction along with the intended investment, if applicable, and any other required documentation.

 

Valuation Procedures

The valuation of the Fund’s portfolio securities is in accordance with policies and procedures adopted by and under the ultimate supervision of the board of trustees. Securities for which market quotations are readily available will be valued using the market value of those securities. Securities for which market quotations are not readily available will be fair valued in accordance with policies and procedures adopted by and under the ultimate supervision of the board of trustees. The method by which a security may be fair valued will depend on the type of security and the circumstances under which the security is being fair valued.

 

Portfolio securities that are traded on U.S. securities exchanges, except option securities, are valued at the last current reported sales price at the time the Fund determines its NAV. Securities traded in the over-the-counter market and quoted on The NASDAQ Stock Market are valued at the NASDAQ Official Closing Price, as determined by NASDAQ, or lacking a NASDAQ Official Closing Price, the last current reported sale price on NASDAQ at the time the Fund determines its NAV.

 

When a last sale or closing price is not available, equity securities, other than option securities, that are traded on a U.S. securities exchange and other equity securities traded in the over-the-counter market are valued at the mean between the most recent bid and asked quotations in accordance with guidelines adopted by the board of trustees. Each option security traded on a U.S. securities exchange is valued at the mid-point of the consolidated bid/ask quote for the option security, also in accordance with guidelines adopted by the board of trustees. Each over-the-counter option that is not traded through the Options Clearing Corporation is valued based on a quotation provided by the counterparty to such option under the ultimate supervision of the board of trustees. Fixed-income securities and certain convertible preferred securities are generally traded in the over-the-counter market and are valued by independent pricing services or by dealers who make markets in such securities. Valuations of such fixed income securities and certain convertible preferred securities consider yield or price of equivalent securities of comparable quality, coupon rate, maturity, type of issue, trading characteristics and other market data and do not rely exclusively upon exchange or over-the-counter prices.

 

Trading on European and Far Eastern exchanges and over-the-counter markets is typically completed at various times before the close of business on each day on which the NYSE is open. Each security trading on these exchanges or over-the-counter markets may be valued utilizing a systematic fair valuation model provided by an independent pricing service approved by the board of trustees. The valuation of each security that meets certain criteria in relation to the valuation model is systematically adjusted to reflect the impact of movement in the U.S. market after the foreign markets close. Securities that do not meet the criteria, or

 

 

that are principally traded in other foreign markets, are valued as of the last reported sale price at the time the Fund determines its NAV, or when reliable market prices or quotations are not readily available, at the mean between the most recent bid and asked quotations as of the close of the appropriate exchange or other designated time. Trading of foreign securities may not take place on every NYSE business day. In addition, trading may take place in various foreign markets on Saturdays or on other days when the NYSE is not open and on which the Fund’s NAV is not calculated.

 

If the pricing committee determines that the valuation of a security in accordance with the methods described above is not reflective of a fair value for such security, the security is valued at a fair value by the pricing committee, under the ultimate supervision of the board of trustees, following the guidelines and/or procedures adopted by the board of trustees.

 

The Fund also may use fair value pricing, pursuant to guidelines adopted by the board of trustees and under the ultimate supervision of the board of trustees, if trading in the security is halted or if the value of a security it holds is materially affected by events occurring before the Fund’s pricing time but after the close of the primary market or exchange on which the security is listed. Those procedures may utilize valuations furnished by pricing services approved by the board of trustees, which may be based on market transactions for comparable securities and various relationships between securities that are generally recognized by institutional traders, a computerized matrix system, or appraisals derived from information concerning the securities or similar securities received from recognized dealers in those securities.

 

When fair value pricing of securities is employed, the prices of securities used by the Fund to calculate its NAV may differ from market quotations or official closing prices. In light of the judgment involved in fair valuations, there can be no assurance that a fair value assigned to a particular security is accurate.

 

Intermediaries

The Fund may authorize intermediaries to accept purchase, exchange and redemption orders on the Fund’s behalf. An order properly received by an intermediary will be deemed to have been received by the Fund as of the time of receipt by the intermediary. If you buy, exchange or redeem shares through an intermediary, you will pay or receive the Fund’s NAV per share (plus any applicable sales charge) next calculated after receipt and acceptance of the order by the intermediary, after giving effect to any transaction charge imposed by the intermediary. The Fund’s NAV is determined as of the close of regular session trading on the NYSE (normally 4:00 p.m., Eastern time) each day that the NYSE is open for trading.

 

If you buy and sell Fund shares through an intermediary, that intermediary may charge a fee for that service. Any such charges could constitute a substantial portion of a smaller account and may not be in your best interest. The Fund cannot always identify individual accounts or transactions for an account that is facilitated by an intermediary. Due to differing operational and systems capabilities, an intermediary may calculate sales charges and fees and track transaction activity differently than the Fund. When transacting in Fund shares, be sure you understand how your intermediary calculates sales charges and fees and tracks transaction activity.

 

CFS, the Fund’s distributor, and its affiliates are currently subject to supplemental compensation payment requests by certain securities broker-dealers, banks or other intermediaries, including third party administrators of qualified plans (each an “Intermediary”) whose customers have purchased Fund shares. CFS or its affiliates in their discretion may make payments to a qualifying Intermediary for various purposes, including to help defray costs incurred by the Intermediary to educate financial advisers about the Fund so they can make recommendations and provide services that are suitable and meet shareholder needs, to access the Intermediary’s representatives and to provide marketing support and other specified services. These payments do not increase the amount paid by you or the Fund.

 

Payments to a qualifying Intermediary in any year generally will not exceed the sum of (a) 0.25% of the prior year’s purchases of Fund shares through the Intermediary and (b) 0.12% of the annual average daily value of Fund shares held through the Intermediary. In the case of Fund shares held by a retirement plan investing through a platform sponsored by an Intermediary, payments to the Intermediary generally will not exceed 0.20% of the annual average daily value of those shares. CFS or its affiliates consider a number of factors in determining whether they will make requested payments, including the qualifying Intermediary’s sales, assets and redemption rates, and the nature of the Intermediary’s services.

 

 

Payments to Intermediaries may create a conflict of interest by influencing the broker-dealer or other Intermediary and your salesperson to recommend the Fund over another investment. Ask your salesperson or visit your Intermediary’s website for more information.

 

Anti-money laundering compliance

The Fund is required to comply with various federal anti-money laundering laws and regulations. Consequently, the Fund will request the following information from all investors: full name, date of birth, Social Security number and permanent street address. Corporate, trust, and other entity accounts must provide additional documentation. The Fund will use this information to verify your identity. The Fund will return your application and the monies received to establish your account if any of this information is missing. After your account is established, the Fund may request additional information from you to assist in verifying your identity. If the Fund is unable to verify your identity, they reserve the right to redeem your account at the current day’s NAV. If at any time the Fund believes you may be involved in suspicious activity or if your identifying information matches information on government lists of suspicious persons, the Fund may choose not to establish a new account or may be required to “freeze” your account. The Fund also may be required to provide a governmental agency with information about your attempt to establish a new account or about transactions that have occurred in your account. The Fund also may be required to transfer monies received to establish a new account, transfer an existing account or transfer the proceeds of an existing account to a governmental agency. In some circumstances, the law may not permit the Fund to inform you that it has taken the actions described above.

 

Transaction restrictions

The Fund reserves the right to reject any order for the purchase of shares in whole or in part for any reason, and to suspend the sale of shares to the public in response to conditions in the securities markets or otherwise. The Fund generally expects to inform any investor within 24 hours if a purchase order has been rejected. The Fund are intended for long-term investment purposes only, and are not intended for short-term or excessive trading. Those practices may disrupt portfolio management strategies and/or increase expenses, thus harming Fund performance.

 

The Fund may, in its discretion, suspend, and may permanently terminate, the purchase privileges or the purchase portion of exchange privileges of any investor who engages in trading activity that the Fund believes would be disruptive to the Fund. Although the Fund will attempt to give prior notice of a suspension or termination of such privileges when it is reasonably able to do so, the suspension or termination may be effective immediately, thereby preventing any uncompleted exchange.

 

In addition, the Fund receives purchase and sale orders through intermediaries and cannot always identify or reasonably detect short-term or excessive trading that may be facilitated by those intermediaries or by the use of omnibus accounts by those intermediaries. Omnibus accounts are comprised of multiple investors whose purchases and redemptions are aggregated and netted before being submitted to the Fund, making it more difficult to locate and eliminate short-term or excessive trading. To the degree the Fund is able to identify excessive or short-term trading in accounts maintained by intermediaries, the Fund will seek the cooperation of the intermediary to enforce the Fund’s excessive trading policy. However, there can be no assurance that an intermediary will cooperate in all instances. Certain intermediaries may not presently possess the same operational capabilities to track the number of purchase, redemption or exchange orders made by an individual investor as the Funds, or they may lack such capabilities entirely. Certain intermediaries may possess other capabilities to deter short-term or excessive trading upon which the Fund may rely. In general, the Fund cannot eliminate the possibility that short-term or excessive trading activity will occur in the Fund.

 

The Fund also reserves the right to restrict the account of any investor with respect to purchase orders or the purchase portion of exchange orders, without prior notice, if the trading activity in the account is determined to be disruptive to the Fund. To minimize harm to the Funds and their shareholders, the Fund may, at the Fund’s sole discretion, exercise these rights if an investor has a history of excessive or disruptive trading. In making this judgment, the Fund may consider trading done in multiple accounts under common ownership or control. Such restriction typically is placed in the account immediately after such disruptive trading is determined to be occurring.

 

 

Excessive trading policies and procedures

Excessive trading may present risks to the Fund’s long-term shareholders. Excessive trading into and out of a Fund can be disruptive to the portfolio, including with respect to the implementation of investment strategies. Excessive trading also may create taxable gains to remaining Fund shareholders and may increase Fund expenses, which may negatively impact investment returns for remaining shareholders.

 

To the extent that the Fund invests in foreign securities, it may be at a greater risk for excessive trading. Some investors may seek to profit from the fact that foreign markets or exchanges normally close earlier in the day than do U.S. markets or exchanges. These investors may seek to engage in a practice known as pricing arbitrage to take advantage of information that becomes available after the close of the foreign markets or exchanges but before the Fund prices its shares, which may affect the prices of the foreign securities held by the Fund. Alternatively, some investors may attempt to benefit from stale pricing — when trading in a security held by the Fund is halted and does not resume prior to the time the Fund calculates its NAV. To the extent that the Fund does not accurately value securities, short-term arbitrage traders may dilute the Fund’s NAV, which may negatively impact long-term shareholders. Although the Fund has adopted policies and procedures intended to reduce their exposure to price arbitrage, stale pricing and other potential pricing inefficiencies, the Fund cannot entirely eliminate the potential for short-term arbitrage trades to dilute the value of Fund shares.

 

The Fund’s policy is against trading of Fund shares by Fund shareholders that is disruptive to the management of the Fund. In analyzing whether trading is disruptive, the Fund will consider the purpose of the trades, the effects on the Fund’s portfolio and shareholders, and the impact of any costs or administrative charges it may incur (net of any reimbursement by the shareholder). For certain redemption and reinvestment transactions in which the investment adviser or its affiliates may engage, see page 52 of the statement of additional information. The Fund attempts to detect and deter excessive trading through the following methods:

 

 

Although the Fund will take steps to detect and deter abusive trading pursuant to the policies and procedures approved by the board of trustees, there are no assurances that these policies and procedures will be effective in limiting excessive trading in all circumstances. For example, the Fund may be unable to completely eliminate the possibility of excessive trading in certain omnibus accounts and other accounts traded through intermediaries as discussed in the “Transaction restrictions” section.

 

The Fund’s policies and procedures regarding excessive trading may be modified at any time.

 

Distributions and taxes

Dividends and capital gains distributions

You may receive two kinds of distributions from the Fund: dividends and capital gains distributions. Unless you requested on the account application or in writing that distributions be made in cash, all dividends and capital gains distributions are paid by crediting you with additional Fund shares of the same class you already own. In addition, under the same shareholder account registration and within the same share class, dividends and distributions from one Fund may be reinvested into another Fund, with this receiving Fund account being subject to the minimum initial investment requirements. These shares are valued at the next NAV per share that is computed after the dividend or distribution date. There is no sales charge applied. The Fund declares and pays dividends annually. Net realized long-term capital gains, if any, are paid to shareholders by the Fund at least annually.

 

If a dividend check is returned undeliverable, or if a check remains outstanding for six months, the Fund reserves the right to reinvest those dividends in additional shares of the Fund at the current NAV and to designate the account as a dividend reinvestment account.

 

 

Taxes

You may realize a capital gain or capital loss when you redeem or exchange shares. Distributions, whether received in cash or reinvested in additional Fund shares, are subject to federal income tax and may be subject to state or local taxes. The federal tax treatment will depend on how long you owned the shares and on your individual tax position. You may be subject to state and local taxes on your investment in the Fund, depending on the laws of your home state and locality.

 

The dividends and distributions paid by the Fund are subject to taxation as of the date of payment, except for those distributions declared in October, November or December and paid in January of the next year. Such a distribution will be treated as though it were received on December 31 of the year in which it is declared.

 

You may be taxed on dividends from net investment income and capital gains distributions at different rates depending on your tax situation. Dividends paid by the Fund from net investment income generally are taxable to you as ordinary income, unless paid from “qualified dividend income,” as described below. Federal taxes on distributions of capital gains by the Fund are determined by how long the Fund owned the investments that generated the gains, rather than how long you have owned your shares. Distributions of gains from investments that the Fund owned for more than one year will generally be taxable to you as long-term capital gains. Distributions of gains from investments that the Fund owned for one year or less will generally be taxable to you as ordinary income. Annually, the Fund will advise you of the source of your distributions for tax purposes.

 

A portion of the dividends from net investment income paid by the Fund may be eligible for the reduced rate applicable to “qualified dividend income,” provided that the recipient of the dividend is an individual and that certain holding period requirements are met. No assurance can be given as to what portion of the dividends paid by the Fund will consist of “qualified dividend income.”

 

The Fund may be required to withhold federal income tax (“backup withholding”) from payments to you if:

 

 

These certifications are contained in the application that you complete and return when you open an account. The Fund must promptly pay to the IRS all amounts withheld. Therefore, it is usually not possible for the Fund to reimburse you for amounts withheld. You may, however, claim the amount withheld as a credit on your federal income tax return.

 

Other information

Shareholder accounts

Each shareholder of the Fund receives quarterly account statements showing transactions in Fund shares, with a balance denominated in Fund shares. A confirmation will be sent to the shareholder upon purchase, redemption, or change of shareholder address (sent to both the former and the new address).

 

Retirement plans

You may use the Fund as an investment for your IRA, profit sharing plan, pension plan, Section 401(k) plan, Section 403(b)(7) plan in the case of employees of public school systems and certain non-profit organizations, and certain other qualified plans. A master IRA plan and information regarding plan administration, fees, and other details are available from us or your plan administrator.

 

Prospectuses and shareholder reports

The Fund reduces the number of duplicate prospectuses and annual and semiannual reports you receive by sending only one copy of each to those addresses shared by two or more accounts. Call us at 800.582.6959 or write to us at the Calamos Family of Funds , c/o U.S. Bancorp Fund Services, LLC, P.O. Box 701, Milwaukee, WI 53201 if you want to receive individual copies of these documents. The Fund will begin sending you individual copies within 30 days of your request.

 

Financial Highlights

 

Financial highlights are not available, as the Fund commenced operation on or about the date of this prospectus.

 

 

Table of Contents

 

 

Calamos Discovery Growth Fund

 

 

 

 

 

 

 

 

 

Buying and Redeeming Fund Shares

Minimum Initial Investment

Class I: $1,000,000

Class R: None

 

Minimum Additional Investment

Classes I and R: None

 

To Place Orders

Please contact your intermediary, or place your order directly:
Mail:
U.S. Bancorp Fund Services, LLC
P.O. Box 701
Milwaukee, WI 53201
Phone: 800.582.6959

 

Transaction Policies

The Fund’s shares are redeemable. In general, investors may purchase, redeem, or exchange Fund shares on any business day by written request (to the address noted above), by wire transfer, by telephone (at the number noted above), or through a financial intermediary. Orders to buy and redeem shares are processed at the next net asset value (share price or “NAV”) to be calculated only on days when the New York Stock Exchange is open for regular trading.

 

Tax Information

The Fund’s distributions may be taxable as ordinary income or capital gains, except when your investment is in an IRA, 401(k) or other tax-advantaged investment plan.

 

Payments to Broker-Dealers and Other Financial Intermediaries

If you purchase shares of the Fund through a broker-dealer or other financial intermediary (such as a bank), the Fund and its related companies may pay the intermediary for the sale of Fund shares and related services. These payments may create a conflict of interest by influencing the broker-dealer or other intermediary and your salesperson to recommend the Fund over another investment. Ask your salesperson or visit your financial intermediary’s website for more information.

 

Additional Information About Investment Strategies and Related Risks

 

What are the investment objectives and principal strategies of the Fund?

When buying and selling growth-oriented securities, the investment adviser focuses on the company’s earnings growth potential coupled with financial strength and stability. In addition, the Fund’s investment adviser focuses on individual stock selection (referred to as a “bottom-up approach”) and quantitative research.

 

In seeking to meet the Fund’s investment objective, the Fund’s investment adviser utilizes highly disciplined institutional management strategies designed to help enhance investment returns while managing risk. As part of these strategies, an in-depth proprietary analysis is employed on an issuing company and its securities. At the portfolio level, risk management tools are also used, such as diversification across companies, sectors and industries to achieve a risk-reward profile suitable for the Fund’s objectives.

 

The Fund’s investment objective may not be changed without the approval of a “majority of the outstanding” shares of the Fund, as defined in the Investment Company Act of 1940. There can be no assurance that the Fund will achieve its objective.

 

Principal Risks of Investing in the Fund

This prospectus describes the risks you may face as an investor in the Fund. It is important to keep in mind that generally, investments with a higher potential reward also have a higher risk of losing money. The reverse is also commonly true: the lower the risk, the lower the potential reward. However, as you consider an investment in the Fund, you should also take into account your tolerance for the daily fluctuations of the financial markets and whether you can afford to leave your money in this investment for a long period of time to ride out down periods.

 

As with any security, there are market and investment risks associated with your investment in the Fund. The value of your investment will fluctuate over time, and it is possible to lose money.

 

In response to market, economic, political, or other conditions, the Fund may temporarily use a different investment strategy for defensive purposes. If the Fund does so, different factors could affect the Fund’s performance, and the Fund may not achieve its investment objective.

 

Additional information regarding the principal risks of investing in the Fund is included below.

 

Market Risk. The risk that the securities markets will increase or decrease in value is considered market risk and applies to any security. If there is a general decline in the stock or fixed-income market, it is possible your investment may lose value regardless of the individual results of the companies in which a Fund invests.

 

Market Disruption Risk. Certain events have a disruptive effect on securities markets, including but not limited to, terrorist attacks, war and other geopolitical events or catastrophes. The Fund’s investment adviser, Calamos Advisors , cannot predict the effect of similar events in the future on the U.S. or foreign economies. Certain securities such as high yield and equity securities tend to be impacted more by these events than other types of securities in terms of price and volatility.

 

Recent Market Events. Over the last several years, domestic and international markets have experienced acute turmoil. This turmoil resulted in unusual and extreme volatility in the equity and debt markets, in the prices of individual securities and in the world economy. In addition, many governments throughout the world responded to the turmoil with a variety of significant fiscal and monetary policy changes, including but not limited to, direct capital infusions into companies, new monetary programs and dramatically lower interest rates. An unexpected or quick reversal of these policies could increase the volatility in the equity and debt markets. These market conditions and continuing economic risks add significantly to the risk of short-term volatility in the Fund.

 

Investment Management Risk. Whether the Fund achieves its investment objective(s) is significantly impacted by whether Calamos Advisors is able to choose suitable investments for the Fund.

 

Equity Investments Risk. Equity investments are subject to greater fluctuations in market value than other asset classes as a result of such factors as a company’s business performance, investor perceptions, stock market trends and general economic conditions.

 

 

Growth Stock Risk. Growth securities experience relatively rapid earnings growth and typically trade at higher multiples of current earnings than other securities. Therefore, growth securities may be more sensitive to changes in current or expected earnings than other securities. Growth securities also may be more volatile because growth companies usually invest a high portion of earnings in their business, and they may lack the dividends of value stocks that can lessen the decreases in stock prices in a falling market. A company may never achieve the earnings expansion the Fund anticipates.

 

Mid-Sized Company Risk. Mid-sized company stocks have historically been subject to greater investment risk than large company stocks. The risks generally associated with these companies include more limited product lines, markets and financial resources, lack of management depth or experience, dependency on key personnel, and vulnerability to adverse market and economic developments. Accordingly, the prices of mid-sized company stocks tend to be more volatile than prices of large company stocks.

 

Small Company Risk. Small company stocks have historically been subject to greater investment risk than mid-sized and large company stocks. The risks generally associated with small companies include more limited product lines, markets and financial resources, lack of management depth or experience, dependency on key personnel, and vulnerability to adverse market and economic developments. Accordingly, the prices of small company stocks tend to be more volatile than prices of mid-sized and large company stocks. Further, the prices of small company stocks are often adversely affected by limited trading volumes and the lack of publicly available information.

 

Securities Lending Risk. The Fund may lend its portfolio securities to broker-dealers and banks in order to generate additional income for the Fund. Any such loan must be continuously secured by collateral in cash or cash equivalents maintained on a current basis in an amount at least equal to the market value of the securities loaned by the Fund. In the event of bankruptcy or other default of a borrower of portfolio securities, the Fund could experience both delays in liquidating the loan collateral or recovering the loaned securities and losses, including (a) possible decline in the value of the collateral or in the value of the securities loaned during the period while the Fund seeks to enforce its rights thereto, (b) possible subnormal levels of income and lack of access to income during this period, and (c) expenses of enforcing its rights. In an effort to reduce these risks, the Fund’s securities lending agent monitors, and reports to Calamos Advisors on, the creditworthiness of the firms to which the Fund lends securities. The Fund may also experience losses as a result of a diminution in value of its cash collateral investments.

 

Foreign Securities Risk. There are special risks associated with investing in foreign securities that are not typically associated with investing in U.S. companies. These risks include fluctuations in the exchange rates of foreign currencies that may affect the U.S. dollar value of a security, and the possibility of substantial price volatility as a result of political and economic instability in the foreign country. Other risks of investing in foreign securities include: less public information about issuers of securities, different securities regulation, different accounting, auditing and financial reporting standards and less liquidity in foreign markets than in U.S. markets.

 

Portfolio Security Holdings Disclosure. A description of the Fund’s policies and procedures in connection with the disclosure of portfolio security holdings of the Fund is available in the statement of additional information and on the Fund’s website, www.calamos.com.

 

Fund Facts

 

Who manages the Fund?

The Fund’s investments are managed by Calamos Advisors LLC , 2020 Calamos Court, Naperville, IL. Calamos Advisors is an indirect subsidiary of Calamos Asset Management, Inc., whose voting shares are majority-owned by Calamos Family Partners, Inc., which is controlled by John P. Calamos, Sr. and the Calamos family.

 

Subject to the overall authority of the board of trustees, Calamos Advisors provides continuous investment supervision and management to the Fund under a management agreement and also furnishes office space, equipment and management personnel. For these services, the Fund pays Calamos Advisors a fee based on its average daily net assets, which is accrued daily and paid on a monthly basis at the annual rate of 1.00%.

 

Calamos Advisors has contractually agreed to limit the annual ordinary operating expenses of the Fund, as a percentage of the average net assets of the particular class of shares, to 1.25% for Class I shares and 1.75% for Class R shares. For purposes of this agreement, operating expenses do not include dividend expense on short positions. This agreement is binding on Calamos Advisors through June 30, 2011.

 

On March 26, 2010, the board of trustees unanimously approved the management agreement for the Fund. A discussion regarding the basis for the approval by the board of trustees of the management agreement for the Fund will be included in the Fund’s annual report to shareholders for the period ended October 31, 2010.

 

Team Approach to Management. Calamos Advisors employs a team approach to portfolio management, led by the Co-CIOs and comprised generally of the Co-CIOs, directors, senior strategy analysts, intermediate analysts and junior analysts. The Co-CIOs, directors and senior strategy analysts are supported by and lead a team of investment professionals whose valuable contributions create a synergy of expertise that can be applied across many different investment strategies.

 

Portfolio holdings are reviewed and trading activity is discussed on a regular basis by team members. Team members, including the Co-CIOs and senior strategy analysts, may each make trading decisions guided by the Fund’s investment objective and strategy.

 

While day-to-day management of the Fund is a team effort, the Co-CIOs, along with the senior strategy analysts, have joint primary and supervisory responsibility for the Fund and work with all team members in developing and executing the Fund’s investment program. Each is further identified below.

 

John P. Calamos, Sr. and Nick P. Calamos, Co-CIOs of Calamos Advisors, generally focus on firmwide risk management and the top-down approach of diversification by country and industry sector and macro-level investment themes. Nick P. Calamos, Co-CIO of Calamos Advisors, also focuses on portfolio level risk management, sector and country weightings, bottom-up fundamental security analysis, and corresponding research and analysis for key holdings. As Co-CIOs, Messrs, John P. Calamos, Sr. and Nick P. Calamos direct the team’s focus on macro themes, upon which the portfolio’s strategy is based. The team, as a whole, implements the investment strategies, under the general direction and supervision of the Co- CIOs and the senior strategy analysts. John P. Calamos, Jr., Jeff Scudieri, Jon Vacko, John Hillenbrand, Steve Klouda, Bryan Lloyd, Dino Dussias, Christopher Hartman and Joe Wysocki are each senior strategy analysts.

 

During the past five years, John P. Calamos, Sr. has been President and Trustee of the Trust and chairman, CEO and Co-CIO of Calamos Advisors and its predecessor company, and Nick P. Calamos has been Vice President and Trustee of the Trust (through June 2006) and Senior Executive Vice President and Co-CIO of Calamos Advisors and its predecessor company. John P. Calamos, Jr., Executive Vice President of Calamos Advisors , joined the firm in 1985 and has held various senior investment positions since that time. Jeff Scudieri joined Calamos Advisors in 1997 and has been a senior strategy analyst since September 2002. Jon Vacko joined Calamos Advisors in 2000 and has been a senior strategy analyst since July 2002. John Hillenbrand joined Calamos Advisors in 2002 and has been a senior strategy analyst since August 2002. Steve Klouda joined Calamos Advisors in 1994 and has been a senior strategy analyst since July 2002. Bryan Lloyd joined Calamos Advisors in October 2003 and has been a senior strategy analyst since June 2006. Dino Dussias joined Calamos Advisors in October 1995 and has been a senior strategy analyst since April 2007. Christopher Hartman joined Calamos Advisors in February 1997 and has been a senior strategy analyst since May 2007. Joe Wysocki joined Calamos Advisors in October 2003 and has been a senior strategy analyst since February 2007.

 

 

The Fund’s statement of additional information provides additional information about the team leaders, including other accounts they manage, their ownership in the Calamos Family of Funds and their compensation.

 

What classes of shares does the Fund offer?

This prospectus offers two classes of shares of the Fund: Class I and Class R shares. Class A, Class B and Class C shares, which have different expense structures, are offered by a separate prospectus. The different classes of Fund shares are investments in the same portfolio of securities, but each class of shares has different expenses and will likely have different NAVs. The main difference between Class I and Class R shares lies primarily in their distribution and service fees. Class R shares bear an aggregate distribution and service fee of 0.50% of average net assets, while Class I shares do not bear distribution or service fees.

 

Class I shares

The offering price for Class I shares is the NAV per share with no initial sales charge. There is no contingent deferred sales charge nor distribution or service fees with respect to Class I shares.

 

Class I shares are offered primarily for direct investment by investors through certain tax-exempt retirement plans (including 401(k) plans, 457 plans, employer-sponsored 403(b) plans, profit sharing and money purchase pension plans, defined benefit plans and non-qualified deferred compensation plans) and by institutional clients, provided such plans or clients have assets of at least $1 million. Class I shares may also be offered to certain other entities or programs, including, but not limited to, investment companies, under certain circumstances.

 

The minimum initial investment required to purchase the Fund’s Class I shares is $1 million. There is no minimum subsequent investment requirement. The Fund may waive the minimum initial investment of $1 million at its sole discretion. The minimum initial investment is waived for current or retired trustees of the Trust, Calamos Asset Management, Inc. and its subsidiaries, officers, employees and their immediate family members, including a spouse, child, stepchild, parent,stepparent sibling, grandchild and grandparent, in each case including in-law and adoptive relationships. It is also waived for clients of Calamos Advisors or an affiliate thereof who acquire shares of the Fund made available through a mutual fund asset allocation program offered by Calamos Advisors or an affiliate thereof. Also, the minimum initial investment for Class I shares may be waived or reduced at the discretion of Calamos Financial Services LLC (“CFS”), the Fund’s distributor, including waivers or reductions for purchases made through certain registered investment advisers and qualified third party platforms.

 

As a result of the relatively lower expenses for Class I shares, the level of income dividends per share (as a percentage of NAV) and, therefore, the overall investment return, will typically be higher for Class I shares than for Class A, Class C or Class R shares.

 

Class R shares

The offering price for Class R shares is the NAV per share with no initial sales charge. However, each Fund pays an aggregate distribution and service fee at the annual rate of 0.50% of average net assets. Class R shares may only be purchased through certain tax-exempt retirement plans held in plan level or omnibus accounts, including 401(k) plans, 457 plans, employer-sponsored 403(b) plans, profit sharing and money purchase pension plans, defined benefit plans and non-qualified deferred compensation plans. There is no minimum initial investment requirement for Class R shares.

 

Distribution and service (Rule 12b-1) plan

The Fund has a Distribution and Service Plan or “12b-1 Plan.” Under the plan, Class R shares pay a distribution and/or service fee at the annual rate of 0.50% of the average daily net assets of the class. The distribution fees are for the sale of Fund shares, and the service fees are for services provided to shareholders. Since the Fund’s assets are used to pay 12b-1 fees on an ongoing basis, over time those fees will increase the cost of your investment and may cost you more than other types of sales charges. For more information about the 12b-1 Plan, please see the Fund’s statement of additional information.

 

Money market fund

If you wish to exchange your Class I shares of the Fund for shares of a money market fund, you may exchange them for Class I shares of the Fidelity Institutional Money Market-Prime Money Market Portfolio (“Fidelity Prime Money Market Fund Shares”).

 

 

Fidelity Prime Money Market Fund Shares are offered by a separate prospectus and are not offered by the Funds. You may at any time exchange your Fidelity Prime Money Market Fund Shares back into shares of the equivalent class of the Calamos Family Of Funds . However, should you redeem (and not exchange) your Fidelity Prime Money Market Fund Shares, you would pay any applicable contingent deferred sales charge. For a prospectus and more complete information on Fidelity Prime Money Market Fund Shares, including management fees and expenses, please call 800.582.6959. Please read the prospectus relating to Fidelity Prime Money Market Fund Shares carefully.

 

How can I buy shares?

If you participate in a tax-exempt retirement plan, you may purchase Class I shares or Class R shares by contacting your plan’s administrator, whose contact information is available through your employer’s human resources department. If you are an institutional client, you may purchase Class I shares either directly or through an authorized dealer.

 

The offering price for shares will be based on the NAV per share next computed after receipt by the Fund’s transfer agent of your purchase order in good form on any day the New York Stock Exchange (the “NYSE”) is open for trading. Generally, if you place your order by 4:00 p.m. Eastern time, you will receive that day’s offering price. Orders placed after 4:00 p.m. Eastern time will receive the following business day’s offering price.

 

We generally do not sell Fund shares to investors residing outside the U.S., Puerto Rico, Guam and the U.S. Virgin Islands, even if they are U.S. citizens or lawful permanent residents of the U.S. We will sell shares to investors residing outside the U.S. if they have U.S. military APO or FPO addresses.

 

Each purchase of shares is confirmed by a written statement mailed to the shareholder, without issuance of share certificates. You may buy shares using the following methods:

 

By mail

You may purchase shares of the Fund by sending a check payable to the Calamos Family of Funds , along with a completed account application to the Fund’s transfer agent: U.S. Bancorp Fund Services, LLC, P.O. Box 701, Milwaukee, WI 53201. A subsequent investment may be made by detaching the stub from your account statement and sending it with your check in the envelope provided with your statement. All checks must be drawn on a U.S. bank in U.S. funds. The Fund will not accept cashier’s checks in amounts less than $10,000. To prevent check fraud, the Fund will not accept Treasury checks, credit card checks, traveler’s checks, starter checks or checks written by third parties for the purchase of shares. The Fund also will not accept money orders, post-dated checks, post-dated online bill pay checks, or conditional orders for the purchase of shares. A $25 charge will be imposed if any payment submitted for investment is returned, and the investor may be responsible for any loss sustained by the Fund. If you purchase shares by check or by electronic funds transfer via the Automatic Clearing House (“ACH”) Network, and redeem them shortly thereafter, payment may be delayed until the transfer agent is reasonably assured that the check or purchase by ACH has been collected, which may take 15 days.

 

By telephone

Once you have established an account, you may make subsequent purchases of $50 or more over the telephone by debiting your bank account. To electronically debit your bank account, you must hold your account at a financial institution that is an ACH member. The Fund will initiate most electronic transfers from your bank account to pay for the share purchase within that same business day. If your order is received prior to generally 4 p.m. Eastern time, your shares will be purchased at the next applicable price calculated on the day your order is placed. To permit telephone purchases, you must authorize telephone purchases on your account application. Call us at 800.582.6959 to purchase shares by telephone or to obtain an account application with the telephone purchase option. If you did not authorize telephone purchases on your original account application, you may request telephone purchases by submitting a request to the Fund’s transfer agent, in writing along with a voided check, at U.S. Bancorp Fund Services, LLC, P.O. Box 701, Milwaukee, WI 53201.

 

The Fund may modify or terminate the ability to purchase shares by telephone at any time, or from time to time, without notice to shareholders. If your order to purchase shares of the Fund is canceled because your electronic transfer does not clear, you will be charged a $25 service fee, and you will be responsible for any resulting loss incurred by the Fund. The Fund and its transfer

 

 

agent will be liable for losses resulting from unauthorized telephone purchases only if the Fund does not follow reasonable procedures designed to verify the identity of the caller. You should immediately verify your trade confirmations when you receive them.

 

By wire

You may purchase shares by wiring funds from your bank. To open an account by wire, a completed account application is required before your wire can be accepted. You may mail or deliver by overnight mail your account application to the transfer agent. Upon receipt of your completed application, the transfer agent will establish an account for you. Your bank must include the name of the Fund you are purchasing, your account number, and your name so that monies can be correctly applied. Your bank should transmit funds by wire to:

 

U.S. Bank, N.A.

777 East Wisconsin Avenue

Milwaukee, WI 53202

ABA #075000022

 

Credit:

U.S. Bancorp Fund Services, LLC

Account #112-952-137

 

Further Credit:

(name of Fund to be purchased)

(account registration)

(account number)

 

Before sending any wire, please advise the transfer agent of your intent to wire funds. This will ensure prompt and accurate credit upon receipt of your wire. Neither the Fund nor the transfer agent is responsible for delays in the Federal Reserve wire system.

 

By exchange

You may exchange Class I shares and Class R shares of the Fund for Class I shares and Class R shares, respectively, of another Fund in the Calamos Family of Funds with no sales charge. In addition, you may exchange Class I Fidelity Prime Money Market Fund Shares for Class I shares of the Fund, provided you meet the eligibility requirements for Class I shares. See “Money market fund” above.

 

Holders of Class A shares issued the Fund may exchange their Class A shares for Class I shares provided that they: (1) hold their shares through an institution that has a valid Class I sales agreement with CFS authorizing such an exchange; and (2) are eligible to invest in Class I shares in accordance with the criteria set forth in this prospectus. Any such exchange is subject to the Fund’s discretion to accept or reject the exchange. No sales charges or other charges will apply to any such exchange, including any contingent deferred sales charge that would otherwise apply to the redemption within two years of purchase of Class A shares originally purchased at net asset value pursuant to the $1,000,000 purchase order privilege. For federal income tax purposes, a same-Fund exchange will not result in the recognition by the investor of a capital gain or loss. Class A shareholders should contact their financial institution for information on the availability of Class I shares, and should read and consider this prospectus before any such exchange.

 

The registration of the account to which you are making an exchange must be exactly the same as that of the account from which the exchange is made, and the amount you exchange must meet any applicable minimum investment of the Fund being purchased. You may exchange your shares by writing to us at the Calamos Family of Funds , c/o U.S. Bancorp Fund Services, LLC, P.O. Box 701, Milwaukee, WI 53201. If you have authorized telephone exchange on your account application, you may also exchange your shares by calling us at 800.582.6959. An exchange may also be made by instructing your financial advisor, who will communicate your instruction to us. An exchange transaction generally is considered a sale and purchase of shares for federal income tax purposes and may result in capital gain or loss.

 

 

The exchange privilege is not intended as a vehicle for short-term or excessive trading. Excessive or short-term exchange activity may interfere with portfolio management and have an adverse effect on all shareholders. Accordingly, the Fund may suspend or permanently terminate the exchange privileges of any investor who appears to be engaged in short-term or excessive trading. Although an investor may be precluded from utilizing the exchange privilege, an investor’s ability to redeem shares of the Fund for cash will not be affected.

 

How can I sell (redeem) shares?

If you participate in a tax-exempt retirement plan, you may redeem Class I shares or Class R shares by contacting your plan’s administrator, whose contact information is available through your employer’s human resources department. If you are an institutional client, you may redeem Class I shares either directly or through an authorized dealer.

 

Once your instruction to sell shares of the Fund has been received, you may not cancel or revoke your request. It is, therefore, very important that you call us if you have any questions about the requirements for selling shares before submitting your request.

 

Through your broker-dealer (certain charges may apply)

Shares held for you in your broker-dealer’s name must be sold through the broker-dealer.

 

By writing to the Fund’s transfer agent

When your shares are held for you by the Fund’s transfer agent, you may sell your shares by sending a written request to: U.S. Bancorp Fund Services, LLC, P.O. Box 701, Milwaukee, WI 53201. Your redemption request must:

 

 

In the case of shares held by a corporation, the redemption request must be signed in the name of the corporation by an officer whose title must be stated, and a certified bylaw provision or resolution of the board of directors authorizing the officer to so act may be required. In the case of a trust or partnership, the signature must include the name of the registered shareholder and the title of the person signing on its behalf. Under certain circumstances, before shares can be redeemed, additional documents may be required in order to verify the authority of the person seeking to redeem.

 

By telephone

Unless telephone redemption was declined on your account application, you may redeem your shares by telephone and have proceeds sent by check to your address of record. With the telephone redemption option, you may sell up to $50,000 worth of shares on any day. You may not redeem by telephone shares held in an IRA account or in an account for which you have changed the address within the preceding 30 days.

 

If you want redemption proceeds sent to your bank account by either wire transfer (at a current cost of $15 per transfer), or electronic funds transfer via the ACH Network at no cost, you must have selected these alternate payment types on the application. If you have authorized telephone redemptions on your original account application, but would like to change the predetermined bank to which proceeds are sent, please submit your request in writing with a signature guarantee, along with a voided check for the new bank account. Only member banks may transmit funds via the ACH network.

 

If you declined telephone redemptions on your original account application, you may request the telephone redemption privilege at a later date by submitting a request in writing, which may require a signature guarantee. Please send your request along with a voided check to have proceeds deposited directly into your bank account to U.S. Bancorp Fund Services, LLC, P. O. Box 701, Milwaukee, WI 53201.

 

 

To redeem shares from your account by telephone, call 800.582.6959. To reduce the risk of fraudulent instruction and to ensure that instructions communicated by telephone are genuine, the Fund will send your redemption proceeds only to the address or bank/brokerage account as shown on their records. The Funds also may record a call, request more information and send written confirmation of telephone transactions. The Fund and its transfer agent will be liable for losses from unauthorized telephone instructions only if the Fund does not follow reasonable procedures designed to verify the identity of the caller. Please verify the accuracy of each telephone transaction as soon as you receive your confirmation statement.

 

During periods of volatile economic and market conditions, you may have difficulty making a redemption request by telephone, in which case you should make your redemption request in writing.

 

By wire

Broker-dealers or other sales agents may communicate redemption orders by wire to the Fund’s transfer agent. There is no limit on redemption proceeds sent by wire.

 

By exchange

You may redeem all or any portion of your shares of the Fund and use the proceeds to purchase shares of any of the other Funds in the Calamos Family of Funds or Fidelity Prime Money Market Fund Shares if your signed, properly completed application is on file. An exchange transaction generally is considered a sale and purchase of shares for federal income tax purposes and may result in capital gain or loss. See “How can I buy shares? — By exchange” for more information about the exchange privilege.

 

Signature guarantees

A signature guarantee is required to redeem shares in the following situations:

 

 

In addition to the situations described above, the Fund and the Fund’s transfer agent reserve the right to require a signature guarantee in other instances based on the circumstances relative to the particular situation.

 

You can obtain a signature guarantee from domestic banks, brokers, dealers including CFS, credit unions, national securities exchanges, registered securities associations, clearing agencies and savings associations, as well as from participants in the New York Stock Exchange Medallion Signature Program and the Securities Transfer Agents Medallion Program (“STAMP”). A notary public is not an acceptable signature guarantor.

 

Redemption-in-kind

Shares normally will be redeemed for cash, although the Fund retains the right to redeem some or all of its shares in-kind under unusual circumstances, in order to protect the interests of remaining shareholders, or to accommodate a request by a particular shareholder that does not adversely affect the interest of the remaining shareholders, by delivery of securities selected from its assets at its discretion. However, the Fund is required to redeem shares solely for cash up to the lesser of $250,000 or 1% of the NAV of the Fund during any 90-day period for any one shareholder. Should redemptions by any shareholder exceed such limitation, the Fund will have the option of redeeming the excess in cash or in-kind. In-kind payment means payment will be made in liquid portfolio securities rather than cash. If that occurs, the redeeming shareholder might incur brokerage and/or other transaction costs to convert the securities to cash.

 

 

Processing time

The Fund will send your redemption proceeds to you by check to the address of record or by wire to a predetermined bank or brokerage account. Redemption proceeds paid by wire will normally be sent on the next business day after receipt of the redemption request. The cost of the wire (currently $15) will be deducted from the redemption proceeds if you are redeeming all of your shares or only a specific number of shares. If you are redeeming a specific dollar amount, the wire fee will be deducted from the remaining balance in the account. You may also have proceeds sent directly to a predetermined bank or brokerage account via electronic funds transfer through the ACH Network if your bank or brokerage firm is an ACH member. There is no charge for an electronic funds transfer through the ACH Network and your proceeds will be credited to your account within two to three business days.

 

Proceeds from the sale of Fund shares will not be sent to you until the check or ACH purchase used to purchase the shares has cleared, which can take up to 15 days after purchase. You may avoid this delay by buying shares with a wire transfer. The Fund may suspend the right of redemption under certain extraordinary circumstances in accordance with the rules of the Securities and Exchange Commission.

 

Small accounts

Due to the relatively high cost of handling small accounts, the Fund may give you 30 days written notice that it intends to redeem your shares, at the NAV of those shares, if your account has a value of less than $500. This would not apply if your account value declined to less than $500 as a result of market fluctuations.

 

Transaction information

Share price

The Fund’s share price, or NAV, is determined as of the close of regular session trading on the NYSE (normally 4:00 p.m. Eastern Time) each day that the NYSE is open. The NYSE is regularly closed on New Year’s Day, the third Mondays in January and February, Good Friday, the last Monday in May, Independence Day, Labor Day, Thanksgiving and Christmas.

 

The NAV per share for each class of Fund shares is calculated by dividing the pro rata share of the value of all of the securities and other assets of the Fund allocable to that class of Fund shares, less the liabilities allocable to that class, by the number of shares of the class outstanding. When shares are purchased or sold, the order is processed at the next NAV (plus any applicable sales charge) that is calculated on a day when the NYSE is open for trading, after receiving a purchase or sale order. Because the Fund may invest in securities that are primarily listed on foreign exchanges and trade on days when the Fund does not price its shares, the Fund’s NAV may change on days when shareholders will not be able to purchase or redeem the Fund’s shares. If shares are purchased or sold through an intermediary, it is the responsibility of that intermediary to transmit those orders to the Fund’s transfer agent so such orders will be received in a timely manner.

 

A purchase or sale order typically is accepted when the Fund’s transfer agent or an intermediary has received a completed application or appropriate instruction along with the intended investment, if applicable, and any other required documentation.

 

Valuation Procedures

The valuation of the Fund’s portfolio securities is in accordance with policies and procedures adopted by and under the ultimate supervision of the board of trustees. Securities for which market quotations are readily available will be valued using the market value of those securities. Securities for which market quotations are not readily available will be fair valued in accordance with policies and procedures adopted by and under the ultimate supervision of the board of trustees. The method by which a security may be fair valued will depend on the type of security and the circumstances under which the security is being fair valued.

 

Portfolio securities that are traded on U.S. securities exchanges, except option securities, are valued at the last current reported sales price at the time the Fund determines its NAV. Securities traded in the over-the-counter market and quoted on The NASDAQ Stock Market are valued at the NASDAQ Official Closing Price, as determined by NASDAQ, or lacking a NASDAQ Official Closing Price, the last current reported sale price on NASDAQ at the time the Fund determines its NAV.

 

When a last sale or closing price is not available, equity securities, other than option securities, that are traded on a U.S. securities exchange and other equity securities traded in the over-the-counter market are valued at the mean between the most recent bid

 

 

and asked quotations in accordance with guidelines adopted by the board of trustees. Each option security traded on a U.S. securities exchange is valued at the mid-point of the consolidated bid/ask quote for the option security, also in accordance with guidelines adopted by the board of trustees. Each over-the-counter option that is not traded through the Options Clearing Corporation is valued based on a quotation provided by the counterparty to such option under the ultimate supervision of the board of trustees. Fixed-income securities and certain convertible preferred securities are generally traded in the over-the-counter market and are valued by independent pricing services or by dealers who make markets in such securities. Valuations of such fixed income securities and certain convertible preferred securities consider yield or price of equivalent securities of comparable quality, coupon rate, maturity, type of issue, trading characteristics and other market data and do not rely exclusively upon exchange or over-the-counter prices.

 

Trading on European and Far Eastern exchanges and over-the-counter markets is typically completed at various times before the close of business on each day on which the NYSE is open. Each security trading on these exchanges or over-the-counter markets may be valued utilizing a systematic fair valuation model provided by an independent pricing service approved by the board of trustees. The valuation of each security that meets certain criteria in relation to the valuation model is systematically adjusted to reflect the impact of movement in the U.S. market after the foreign markets close. Securities that do not meet the criteria, or that are principally traded in other foreign markets, are valued as of the last reported sale price at the time the Fund determines its NAV, or when reliable market prices or quotations are not readily available, at the mean between the most recent bid and asked quotations as of the close of the appropriate exchange or other designated time. Trading of foreign securities may not take place on every NYSE business day. In addition, trading may take place in various foreign markets on Saturdays or on other days when the NYSE is not open and on which the Fund’s NAV is not calculated.

 

If the pricing committee determines that the valuation of a security in accordance with the methods described above is not reflective of a fair value for such security, the security is valued at a fair value by the pricing committee, under the ultimate supervision of the board of trustees, following the guidelines and/or procedures adopted by the board of trustees.

 

The Fund also may use fair value pricing, pursuant to guidelines adopted by the board of trustees and under the ultimate supervision of the board of trustees, if trading in the security is halted or if the value of a security it holds is materially affected by events occurring before the Fund’s pricing time but after the close of the primary market or exchange on which the security is listed. Those procedures may utilize valuations furnished by pricing services approved by the board of trustees, which may be based on market transactions for comparable securities and various relationships between securities that are generally recognized by institutional traders, a computerized matrix system, or appraisals derived from information concerning the securities or similar securities received from recognized dealers in those securities.

 

When fair value pricing of securities is employed, the prices of securities used by the Fund to calculate its NAV may differ from market quotations or official closing prices. In light of the judgment involved in fair valuations, there can be no assurance that a fair value assigned to a particular security is accurate.

 

Intermediaries

The Fund may authorize intermediaries to accept purchase, exchange and redemption orders on the Fund’s behalf. An order properly received by an intermediary will be deemed to have been received by the Fund as of the time of receipt by the intermediary. If you buy, exchange or redeem shares through an intermediary, you will pay or receive the Fund’s NAV per share (plus any applicable sales charge) next calculated after receipt and acceptance of the order by the intermediary, after giving effect to any transaction charge imposed by the intermediary. The Fund’s NAV is determined as of the close of regular session trading on the NYSE (normally 4:00 p.m., Eastern time) each day that the NYSE is open for trading.

 

If you buy and sell Fund shares through an intermediary, that intermediary may charge a fee for that service. Any such charges could constitute a substantial portion of a smaller account and may not be in your best interest. The Fund cannot always identify individual accounts or transactions for an account that is facilitated by an intermediary. Due to differing operational and systems capabilities, an intermediary may calculate sales charges and fees and track transaction activity differently than the Fund. When transacting in Fund shares, be sure you understand how your intermediary calculates sales charges and fees and tracks transaction activity.

 

 

CFS, the Fund’s distributor, and its affiliates are currently subject to supplemental compensation payment requests by certain securities broker-dealers, banks or other intermediaries, including third party administrators of qualified plans (each an “Intermediary”) whose customers have purchased Fund shares. CFS or its affiliates in their discretion may make payments to a qualifying Intermediary for various purposes, including to help defray costs incurred by the Intermediary to educate financial advisers about the Fund so they can make recommendations and provide services that are suitable and meet shareholder needs, to access the Intermediary’s representatives and to provide marketing support and other specified services. These payments do not increase the amount paid by you or the Fund.

 

Payments to a qualifying Intermediary in any year generally will not exceed the sum of (a) 0.25% of the prior year’s purchases of Fund shares through the Intermediary and (b) 0.12% of the annual average daily value of Fund shares held through the Intermediary. In the case of Fund shares held by a retirement plan investing through a platform sponsored by an Intermediary, payments to the Intermediary generally will not exceed 0.20% of the annual average daily value of those shares. CFS or its affiliates consider a number of factors in determining whether they will make requested payments, including the qualifying Intermediary’s sales, assets and redemption rates, and the nature of the Intermediary’s services.

 

Payments to Intermediaries may create a conflict of interest by influencing the broker-dealer or other Intermediary and your salesperson to recommend the Fund over another investment. Ask your salesperson or visit your Intermediary’s website for more information.

 

Anti-money laundering compliance

The Fund is required to comply with various federal anti-money laundering laws and regulations. Consequently, the Fund will request the following information from all investors: full name, date of birth, Social Security number and permanent street address. Corporate, trust, and other entity accounts must provide additional documentation. The Fund will use this information to verify your identity. The Fund will return your application and the monies received to establish your account if any of this information is missing. After your account is established, the Fund may request additional information from you to assist in verifying your identity. If the Fund is unable to verify your identity, they reserve the right to redeem your account at the current day’s NAV. If at any time the Fund believes you may be involved in suspicious activity or if your identifying information matches information on government lists of suspicious persons, the Fund may choose not to establish a new account or may be required to “freeze” your account. The Fund also may be required to provide a governmental agency with information about your attempt to establish a new account or about transactions that have occurred in your account. The Fund also may be required to transfer monies received to establish a new account, transfer an existing account or transfer the proceeds of an existing account to a governmental agency. In some circumstances, the law may not permit the Fund to inform you that it has taken the actions described above.

 

Transaction restrictions

The Fund reserves the right to reject any order for the purchase of shares in whole or in part for any reason, and to suspend the sale of shares to the public in response to conditions in the securities markets or otherwise. The Fund generally expects to inform any investor within 24 hours if a purchase order has been rejected. The Fund are intended for long-term investment purposes only, and are not intended for short-term or excessive trading. Those practices may disrupt portfolio management strategies and/or increase expenses, thus harming Fund performance.

 

The Fund may, in its discretion, suspend, and may permanently terminate, the purchase privileges or the purchase portion of exchange privileges of any investor who engages in trading activity that the Fund believes would be disruptive to the Fund. Although the Fund will attempt to give prior notice of a suspension or termination of such privileges when it is reasonably able to do so, the suspension or termination may be effective immediately, thereby preventing any uncompleted exchange.

 

In addition, the Fund receives purchase and sale orders through intermediaries and cannot always identify or reasonably detect short-term or excessive trading that may be facilitated by those intermediaries or by the use of omnibus accounts by those intermediaries. Omnibus accounts are comprised of multiple investors whose purchases and redemptions are aggregated and netted before being submitted to the Fund, making it more difficult to locate and eliminate short-term or excessive trading. To the degree the Fund is able to identify excessive or short-term trading in accounts maintained by intermediaries, the Fund will

 

 

seek the cooperation of the intermediary to enforce the Fund’s excessive trading policy. However, there can be no assurance that an intermediary will cooperate in all instances. Certain intermediaries may not presently possess the same operational capabilities to track the number of purchase, redemption or exchange orders made by an individual investor as the Funds, or they may lack such capabilities entirely. Certain intermediaries may possess other capabilities to deter short-term or excessive trading upon which the Fund may rely. In general, the Fund cannot eliminate the possibility that short-term or excessive trading activity will occur in the Fund.

 

The Fund also reserves the right to restrict the account of any investor with respect to purchase orders or the purchase portion of exchange orders, without prior notice, if the trading activity in the account is determined to be disruptive to the Fund. To minimize harm to the Funds and their shareholders, the Fund may, at the Fund’s sole discretion, exercise these rights if an investor has a history of excessive or disruptive trading. In making this judgment, the Fund may consider trading done in multiple accounts under common ownership or control. Such restriction typically is placed in the account immediately after such disruptive trading is determined to be occurring.

 

Excessive trading policies and procedures

Excessive trading may present risks to the Fund’s long-term shareholders. Excessive trading into and out of a Fund can be disruptive to the portfolio, including with respect to the implementation of investment strategies. Excessive trading also may create taxable gains to remaining Fund shareholders and may increase Fund expenses, which may negatively impact investment returns for remaining shareholders.

 

To the extent that the Fund invests in foreign securities, it may be at a greater risk for excessive trading. Some investors may seek to profit from the fact that foreign markets or exchanges normally close earlier in the day than do U.S. markets or exchanges. These investors may seek to engage in a practice known as pricing arbitrage to take advantage of information that becomes available after the close of the foreign markets or exchanges but before the Fund prices its shares, which may affect the prices of the foreign securities held by the Fund. Alternatively, some investors may attempt to benefit from stale pricing — when trading in a security held by the Fund is halted and does not resume prior to the time the Fund calculates its NAV. To the extent that the Fund does not accurately value securities, short-term arbitrage traders may dilute the Fund’s NAV, which may negatively impact long-term shareholders. Although the Fund has adopted policies and procedures intended to reduce their exposure to price arbitrage, stale pricing and other potential pricing inefficiencies, the Fund cannot entirely eliminate the potential for short-term arbitrage trades to dilute the value of Fund shares.

 

The Fund’s policy is against trading of Fund shares by Fund shareholders that is disruptive to the management of the Fund. In analyzing whether trading is disruptive, the Fund will consider the purpose of the trades, the effects on the Fund’s portfolio and shareholders, and the impact of any costs or administrative charges it may incur (net of any reimbursement by the shareholder). For certain redemption and reinvestment transactions in which the investment adviser or its affiliates may engage, see page 52 of the statement of additional information. The Fund attempts to detect and deter excessive trading through the following methods:

 

 

Although the Fund will take steps to detect and deter abusive trading pursuant to the policies and procedures approved by the board of trustees, there are no assurances that these policies and procedures will be effective in limiting excessive trading in all circumstances. For example, the Fund may be unable to completely eliminate the possibility of excessive trading in certain omnibus accounts and other accounts traded through intermediaries as discussed in the “Transaction restrictions” section.

 

The Fund’s policies and procedures regarding excessive trading may be modified at any time.

 

 

 

Distributions and taxes

Dividends and capital gains distributions

You may receive two kinds of distributions from the Fund: dividends and capital gains distributions. Unless you requested on the account application or in writing that distributions be made in cash, all dividends and capital gains distributions are paid by crediting you with additional Fund shares of the same class you already own. In addition, under the same shareholder account registration and within the same share class, dividends and distributions from one Fund may be reinvested into another Fund, with this receiving Fund account being subject to the minimum initial investment requirements. These shares are valued at the next NAV per share that is computed after the dividend or distribution date. There is no sales charge applied. The Fund declares and pays dividends annually. Net realized long-term capital gains, if any, are paid to shareholders by the Fund at least annually.

 

If a dividend check is returned undeliverable, or if a check remains outstanding for six months, the Fund reserves the right to reinvest those dividends in additional shares of the Fund at the current NAV and to designate the account as a dividend reinvestment account.

 

Taxes

You may realize a capital gain or capital loss when you redeem or exchange shares. Distributions, whether received in cash or reinvested in additional Fund shares, are subject to federal income tax and may be subject to state or local taxes. The federal tax treatment will depend on how long you owned the shares and on your individual tax position. You may be subject to state and local taxes on your investment in the Fund, depending on the laws of your home state and locality.

 

The dividends and distributions paid by the Fund are subject to taxation as of the date of payment, except for those distributions declared in October, November or December and paid in January of the next year. Such a distribution will be treated as though it were received on December 31 of the year in which it is declared.

 

You may be taxed on dividends from net investment income and capital gains distributions at different rates depending on your tax situation. Dividends paid by the Fund from net investment income generally are taxable to you as ordinary income, unless paid from “qualified dividend income,” as described below. Federal taxes on distributions of capital gains by the Fund are determined by how long the Fund owned the investments that generated the gains, rather than how long you have owned your shares. Distributions of gains from investments that the Fund owned for more than one year will generally be taxable to you as long-term capital gains. Distributions of gains from investments that the Fund owned for one year or less will generally be taxable to you as ordinary income. Annually, the Fund will advise you of the source of your distributions for tax purposes.

 

A portion of the dividends from net investment income paid by the Fund may be eligible for the reduced rate applicable to “qualified dividend income,” provided that the recipient of the dividend is an individual and that certain holding period requirements are met. No assurance can be given as to what portion of the dividends paid by the Fund will consist of “qualified dividend income.”

 

The Fund may be required to withhold federal income tax (“backup withholding”) from payments to you if:

 

 

These certifications are contained in the application that you complete and return when you open an account. The Fund must promptly pay to the IRS all amounts withheld. Therefore, it is usually not possible for the Fund to reimburse you for amounts withheld. You may, however, claim the amount withheld as a credit on your federal income tax return.

 

 

 

Other information

Shareholder accounts

Each shareholder of the Fund receives quarterly account statements showing transactions in Fund shares, with a balance denominated in Fund shares. A confirmation will be sent to the shareholder upon purchase, redemption, or change of shareholder address (sent to both the former and the new address).

 

Retirement plans

You may use the Fund as an investment for your IRA, profit sharing plan, pension plan, Section 401(k) plan, Section 403(b)(7) plan in the case of employees of public school systems and certain non-profit organizations, and certain other qualified plans. A master IRA plan and information regarding plan administration, fees, and other details are available from us or your plan administrator.

 

Prospectuses and shareholder reports

The Fund reduces the number of duplicate prospectuses and annual and semiannual reports you receive by sending only one copy of each to those addresses shared by two or more accounts. Call us at 800.582.6959 or write to us at the Calamos Family of Funds , c/o U.S. Bancorp Fund Services, LLC, P.O. Box 701, Milwaukee, WI 53201 if you want to receive individual copies of these documents. The Fund will begin sending you individual copies within 30 days of your request.

 

Financial Highlights

 

Financial highlights are not available, as the Fund commenced operation on or about the date of this prospectus.

This page intentionally left blank.

 

STATEMENT OF ADDITIONAL INFORMATION		March 1, 2010 as supplemented on June 1, 2010

CALAMOS (R) FAMILY OF FUNDS

GROWTH FUND
VALUE FUND
BLUE CHIP FUND
MULTI-FUND BLEND
INTERNATIONAL GROWTH FUND
EVOLVING WORLD GROWTH FUND
GLOBAL EQUITY FUND
GROWTH AND INCOME FUND
GLOBAL GROWTH AND INCOME FUND
CONVERTIBLE FUND
TOTAL RETURN BOND FUND
HIGH YIELD FUND
MARKET NEUTRAL INCOME FUND
DISCOVERY GROWTH FUND
2020 Calamos Court
Naperville, Illinois 60563
800.582.6959

     This Statement of Additional Information relates to CALAMOS(R) Growth Fund, CALAMOS(R) Value Fund, CALAMOS(R) Blue Chip Fund, CALAMOS(R) Multi-Fund Blend, CALAMOS(R) International Growth Fund, CALAMOS(R) Global Equity Fund, CALAMOS(R) Evolving World Growth Fund, CALAMOS(R) Growth and Income Fund, CALAMOS(R) Global Growth and Income Fund, CALAMOS(R) Convertible Fund, CALAMOS(R) Total Return Bond Fund, CALAMOS(R) High Yield Fund, CALAMOS(R) Market Neutral Income Fund and CALAMOS(R) Discovery Growth Fund (the “Funds”), each of which is a series of Calamos Investment Trust (the “Trust”). It is not a prospectus, but provides information that should be read in conjunction with the CALAMOS(R) Family of Funds prospectus, dated March 1, 2010, and the CALAMOS(R) Discovery Growth Fund prospectus, dated June 1, 2010, and any supplements thereto, which are incorporated herein by reference. The Funds’ financial statements and financial highlights for the fiscal year ended October 31, 2009 (except for those of Discovery Growth Fund, which had not commenced operation as of October 31, 2009), as well as the report of the independent registered public accounting firm, are incorporated herein by reference from the Funds’ annual report to shareholders. The prospectus and the annual and semi-annual reports of the Funds may be obtained without charge by writing or telephoning the Funds at the address or telephone numbers set forth above.

MFSAI 1160 06/10

TABLE OF CONTENTS

		PAGE
The Trust and the Funds			3
Investment Objectives			3
Investment Practices			4
Investment Restrictions			23
Management			27
Investment Advisory Services			35
Team Approach to Management			39
Distribution Plan			42
Distributor			46
Other Compensation to Dealers			46
Portfolio Transactions			48
Share Classes and Pricing of Shares			51
Taxation			54
Certain Shareholders			60
Custodian and Transfer Agent			93
Fund Accounting and Financial Accounting Agent			93
Independent Registered Public Accounting Firm			94
General Information			94
Financial Statements			95
Appendix — Description of Bond Ratings			96

THE TRUST AND THE FUNDS

     The Trust was organized as a Massachusetts business trust on December 21, 1987. Each Fund is an open-end, diversified management investment company. Prior to June 23, 1997, the name of the Trust was CFS Investment Trust. Market Neutral Income Fund was named “Market Neutral Fund” prior to December 30, 2005 and “Strategic Income Fund” prior to July 30, 1999. Prior to April 1, 2003, Global Growth and Income Fund was named “Global Convertible Fund” and Growth and Income Fund was named “Convertible Growth and Income Fund.” Prior to December 1, 2003, Value Fund was named “Mid Cap Value Fund.”

INVESTMENT OBJECTIVES

     Each Fund’s investment objectives are shown below:

     GROWTH FUND seeks long-term capital growth.

     VALUE FUND seeks long-term capital growth.

     BLUE CHIP FUND seeks long-term capital growth. Under normal circumstances, Blue Chip Fund will invest at least 80% of its net assets (plus any borrowings) in “Blue Chip” companies.

     MULTI-FUND BLEND seeks long-term capital growth with current income as its secondary objective. The Fund invests primarily in Class I shares of a combination of CALAMOS (R) Funds (the “underlying funds”) on a fixed percentage allocation basis. The Fund makes equal allocations of its assets among Growth Fund, Value Fund and Global Growth and Income Fund.

     INTERNATIONAL GROWTH FUND seeks long-term capital growth. The Fund invests primarily in a globally diversified portfolio of equity securities.

     EVOLVING WORLD GROWTH FUND seeks long-term capital growth.

     GLOBAL EQUITY FUND seeks long-term capital growth. The Fund invests primarily in a globally diversified portfolio of equity securities. Under normal circumstances, the Fund will invest at least 80% of its net assets (plus any borrowings) in equity securities.

     GROWTH AND INCOME FUND seeks high long-term total return through growth and current income. The Fund invests primarily in a diversified portfolio of convertible, equity and fixed-income securities.

     GLOBAL GROWTH AND INCOME FUND seeks high long-term total return through capital appreciation and current income. The Fund invests primarily in a globally diversified portfolio of convertible, equity and fixed-income securities.

     CONVERTIBLE FUND seeks current income with growth as its secondary objective. Under normal circumstances, Convertible Fund will invest at least 80% of its net assets (plus any borrowings) in convertible securities.

     TOTAL RETURN BOND FUND seeks total return, consistent with preservation of capital and prudent investment management. Under normal circumstances, the Fund will invest at least 80% of its net assets (plus any borrowings) in a diversified portfolio of fixed-income instruments of varying maturities, including derivative instruments with economic characteristics similar to such fixed-income instruments.

     HIGH YIELD FUND seeks the highest level of current income obtainable with reasonable risk. Its secondary objective is capital gain where consistent with its primary objective. Under normal circumstances, High Yield Fund will invest at least 80% of its net assets (plus any borrowings) in high yield, fixed-income securities (junk bonds).

     MARKET NEUTRAL INCOME FUND seeks high current income consistent with stability of principal. The Fund seeks to achieve its objective primarily through investment in convertible securities and employment of short selling to enhance income and hedge against market risk.

     DISCOVERY GROWTH FUND seeks long-term capital growth. The investment objectives of each Fund may not be changed without the approval of a “majority of the outstanding” shares of that Fund, as defined in the Investment Company Act of 1940, as amended (the “1940 Act”). Each of Blue Chip Fund, High Yield Fund Convertible Fund, Global Equity Fund and Total Return Bond Fund will notify shareholders at least 60 days prior to any change in its 80% policy.

INVESTMENT PRACTICES

     The prospectus contains information concerning each Fund’s investment objectives and principal investment strategies and risks. This Statement of Additional Information provides additional information concerning certain securities and strategies used by the Funds and their associated risks.

     In pursuing its investment objectives, each Fund will invest as described below and in the Funds’ prospectus. The table below indicates whether each Fund, directly or indirectly through its investment in the underlying funds, invests in the securities and instruments listed as part of its principal (P) or non-principal (N) investment strategies.

EQUITY SECURITIES

     Equity securities include common and preferred stocks, warrants, rights, and depository receipts. An investment in the equity securities of a company represents a proportionate ownership interest in that company. Therefore, a Fund participates in the financial success or failure of any company in which it has an equity interest.

     Equity investments are subject to greater fluctuations in market value than other asset classes as a result of such factors as the issuer’s business performance, investor perceptions, stock market trends and general economic conditions. Equity securities are subordinated to bonds and other debt instruments in a company’s capital structure in terms of priority to corporate income and liquidation payments. See the prospectus for additional information regarding equity investments and their risks.

CONVERTIBLE SECURITIES

     Convertible securities include any corporate debt security or preferred stock that may be converted into underlying shares of common stock. The common stock underlying convertible securities may be issued by a different entity than the issuer of the convertible securities. Convertible securities entitle the holder to receive interest payments paid on corporate debt securities or the dividend preference on a preferred stock until such time as the convertible security matures or is redeemed or until the holder elects to exercise the conversion privilege. As a result of the conversion feature, however, the interest rate or dividend preference on a convertible security is generally less than would be the case if the security were a non-convertible obligation.

     The value of convertible securities is influenced by both the yield of non-convertible securities of comparable issuers and by the value of the underlying common stock. A convertible security’s value viewed without regard to its conversion feature (i.e., strictly on the basis of its yield) is sometimes referred to as its “investment value.” A convertible security’s investment value typically will fluctuate inversely with changes in prevailing interest rates. However, at the same time, the convertible security will be influenced by its “conversion value,” which is the market value of the underlying common stock that would be obtained if the convertible security were converted. Conversion value fluctuates directly with the price of the underlying common stock.

     If, because of a low price of the common stock, a convertible security’s conversion value is substantially below its investment value, the convertible security’s price is governed principally by its investment value. If a convertible security’s conversion value increases to a point that approximates or exceeds its investment value, the convertible security’s value will be principally influenced by its conversion value. A convertible security will sell at a premium over its conversion value to the extent investors place value on the right to acquire the underlying common stock while holding a fixed-income security. Holders of convertible securities have a claim on the issuer’s assets prior to the common stockholders, but may be subordinated to holders of similar non-convertible securities of the same issuer.

SYNTHETIC CONVERTIBLE INSTRUMENTS

     A Fund may establish a “synthetic” convertible instrument by combining fixed-income securities (which may be either convertible or non-convertible) with the right to acquire equity securities. In establishing a synthetic instrument, a Fund may pool a basket of fixed-income securities and a basket of warrants or options that produce the economic characteristics similar to a convertible security. Within each basket of fixed-income securities and warrants or options, different companies may issue the fixed-income and convertible components, which may be purchased separately and at different times.

     More flexibility is possible in the assembly of a synthetic convertible instrument than in the purchase of a convertible security. Although synthetic convertible instruments may be selected where the two components are issued by a single issuer, the character of a synthetic convertible instrument allows the combination of components representing distinct issuers, when management believes that such a combination would better promote a Fund’s investment objectives. A synthetic convertible instrument also is a more flexible investment in that its two components may be purchased separately. For example, a Fund may purchase a warrant for inclusion in a synthetic convertible instrument but temporarily hold short-term investments while postponing the purchase of a corresponding bond pending development of more favorable market conditions. Convertible Fund’s holdings of synthetic convertible instruments are considered convertible securities for purposes of the Fund’s policy to invest at least 80% of its net assets (plus any borrowings) in convertible securities.

     A holder of a synthetic convertible instrument faces the risk of a decline in the price of the security or the level of the index involved in the convertible component, causing a decline in the value of the call option or warrant purchased to create the synthetic convertible instrument. Should the price of the stock fall below the exercise price and remain there throughout the exercise period, the entire amount paid for the call option or warrant would be lost. Because a synthetic convertible instrument includes the fixed-income component as well, the holder of a synthetic convertible instrument also faces the risk that interest rates will rise, causing a decline in the value of the fixed-income instrument.

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

DEBT SECURITIES (INCLUDING HIGH YIELD FIXED-INCOME SECURITIES)

     In pursuing its investment objectives, a Fund may invest in convertible and non-convertible debt securities, including high yield fixed-income securities (i.e., securities rated BB or lower by Standard & Poor’s Corporation, a division of The McGraw-Hill Companies (“S&P”), or Ba or lower by Moody’s Investor Services, Inc. (“Moody’s”)) and securities that are not rated but are considered by Calamos Advisors LLC (“Calamos Advisors”), the Funds’ investment adviser, to be of similar quality. There are no restrictions as to the ratings of debt securities that may be acquired by a Fund or the portion of a Fund’s assets that may be invested in debt securities in a particular rating category, except that Total Return Bond Fund may not invest more than 25% of its net assets in high yield fixed-income securities, and no Fund other than High Yield Fund may acquire a security rated below C.

     Securities rated BBB or Baa are considered to be medium grade and to have speculative characteristics. High yield fixed-income securities are predominantly speculative with respect to the issuer’s capacity to pay interest and repay principal. Investment in medium- or lower-quality debt securities involves greater investment risk, including the possibility of issuer default or bankruptcy. An economic downturn could severely disrupt the market for such securities and adversely affect the value of such securities. In addition, lower-quality bonds are less sensitive to interest rate changes than higher-quality instruments and generally are more sensitive to adverse economic changes or individual corporate developments. During a period of adverse economic changes, including a period of rising interest rates, issuers of such bonds may experience difficulty in servicing their principal and interest payment obligations.

     Achievement by a Fund of its investment objectives will be more dependent on Calamos Advisors’ credit analysis than would be the case if the Fund were investing in higher-quality debt securities. Because the ratings of rating services (which evaluate the safety of principal and interest payments, not market risks) are used only as preliminary indicators of investment quality, Calamos Advisors employs its own credit research and analysis. These analyses may take into consideration such quantitative factors as an issuer’s present and potential liquidity, profitability, internal capability to generate funds, debt/equity ratio and debt servicing capabilities, and such qualitative factors as an assessment of management, industry characteristics, accounting methodology, and foreign business exposure.

     Medium- and lower-quality debt securities may be less marketable than higher-quality debt securities because the market for them is less broad. The market for unrated debt securities is even narrower. During periods of thin trading in these markets, the spread between bid and asked prices is likely to increase significantly, and a Fund may have greater difficulty selling its portfolio securities. The market value of these securities and their liquidity may be affected by adverse publicity and investor perceptions.

U.S. GOVERNMENT OBLIGATIONS

     U.S. Government Obligations include securities that are issued or guaranteed by the U.S. Treasury or by various U.S. Government agencies and instrumentalities. U.S. Treasury obligations (“U.S. Treasuries”) include Treasury bills, Treasury notes, and Treasury bonds. U.S. Treasuries also include the separate principal and interest components of U.S. Treasuries that are traded under the Separate Trading of Registered Interest and Principal of Securities (“STRIPS”) program. U.S. Treasury obligations are backed by the full faith and credit of the U.S.

     Obligations issued or guaranteed by U.S. Government agencies and instrumentalities may be supported by any of the following: (a) the full faith and credit of the U.S., (b) the right of the issuer to borrow an amount limited to a specific line of credit from the U.S. Treasury, (c) the discretionary authority of the U.S. Treasury to lend to such Government agency or instrumentality, or (d) the credit of the agency or instrumentality. Government agencies that issue or guarantee securities backed by the full faith and credit of the U.S. include the Government National Mortgage Association (“GNMA”) and the Small Business Administration. Government agencies and instrumentalities that issue or guarantee securities not backed by the full faith and credit of the U.S. include the Federal Farm Credit Banks, the Federal Home Loan Banks, the Federal Home Loan Mortgage Corporation, the Federal National Mortgage Association (“FNMA”), the Federal Land Bank, the Bank for Cooperatives, the Federal Intermediate Credit Bank, the Federal Financing Bank, the Resolution Funding Corporation, the Financing Corporation of America and the Tennessee Valley Authority. In the case of securities not backed by the full faith and credit of the U.S., the investor must look principally to the agency issuing or guaranteeing the obligation for ultimate repayment and may not be able to assert a claim against the U.S. in the event the agency or instrumentality does not meet its commitment.

     A Fund may invest in securities issued or guaranteed by any of the entities listed above or by any other agency established or sponsored by the U.S. Government, provided that the securities are otherwise permissible investments of the Fund. Certain U.S. Government Obligations that have a variable rate of interest readjusted no less frequently than annually will be deemed to have a maturity equal to the period remaining until the next readjustment of the interest rate.

     A Fund’s yield will fluctuate due to changes in interest rates, economic conditions, quality ratings and other factors. The prepayment experience of the mortgages underlying mortgage-related securities, such as obligations issued by GNMA, may affect the value of, and return on, an investment in such securities.

STRIPPED SECURITIES

     Stripped securities include Treasury receipts, securities of government-sponsored enterprises (“GSEs”), stripped mortgage-backed securities (“SMBS”), and other “stripped” securities that evidence ownership in either the future interest payments or the future principal payments on U.S. Government, mortgage and other obligations. The stripped securities purchased are issued by the U.S. Government (or a U.S. Government agency or instrumentality) or by private issuers such as banks, corporations and other institutions at a discount to their face value. These securities generally are structured to make a lump-sum payment at maturity and do not make periodic payments of

principal or interest. Hence, the duration of these securities tends to be longer and they are therefore more sensitive to interest rate fluctuations than similar securities that offer periodic payments over time. The Funds will not purchase stripped securities that are subject to prepayment or extension risk. SMBS are usually structure with two classes that receive different proportions of the interest and principal distributions on a pool of mortgage assets. SMBS that are structured to receive interest only are extremely sensitive to changes in the prevailing interest rates as well as the rate of principal payments (including prepayments) on the related underlying mortgage assets, and are therefore much more volatile than SMBS that receive principal only.

     Stripped securities may also include participations in trusts that hold U.S. Treasury securities such as Treasury Investors Growth Receipts (“TIGRs”) and Certificates of Accrual on Treasury Securities (“CATS”) or other obligations where the trust participations evidence ownership in either the future interest payments or the future principal payments on the obligations. These participations are normally issued at a discount to their “face value,” and can exhibit greater price volatility than ordinary debt securities because of the way in which their principal and interest are returned to investors.

MORTGAGE-RELATED AND OTHER ASSET-BACKED SECURITIES

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

     The value of some mortgage- or asset-backed securities may be particularly sensitive to changes in prevailing interest rates. Early repayment of principal on some mortgage-related securities may expose a Fund to a lower rate of return upon reinvestment of principal. When interest rates rise, the value of a mortgage-related security generally will decline; however, when interest rates are declining, the value of mortgage-related securities with prepayment features may not increase as much as other fixed-income securities. The rate of prepayments on underlying mortgages will affect the price and volatility of a mortgage-related security, and may shorten or extend the effective maturity of the security beyond what was anticipated at the time of purchase. If unanticipated rates of prepayment on underlying mortgages accelerate the effective maturity of a mortgage-related security, the volatility of the security can be expected to increase. The value of these securities may fluctuate in response to the market’s perception of the creditworthiness of the issuers. Additionally, although mortgages and mortgage-related securities are generally supported by some form of government or private guarantee and/or insurance, there is no assurance that private guarantors or insurers will meet their obligations.

     One type of SMBS has one class receiving all of the interest from the mortgage assets (the interest-only, or “IO” class), while the other class will receive all of the principal (the principal- only, or “PO” class). The yield to maturity on an IO class is extremely sensitive to the rate of principal payments (including prepayments) on the underlying mortgage assets, and a rapid rate of principal payments may have a material adverse effect on a Fund’s yield to maturity from these securities.

     Total Return Bond Fund may invest up to 5% of its total assets in any combination of mortgage-related and other asset-backed IO and PO securities. A Fund may invest in collateralized debt obligations (“CDOs”), which include collateralized bond obligations (“CBOs”), collateralized loan obligations (“CLOs”) and other similarly structured securities. CBOs and CLOs are types of asset-backed securities. A CBO is a trust that is backed by a diversified pool of high risk, below investment grade fixed-income securities. A CLO is a trust typically collateralized by a pool of loans, which may include, among others, domestic and foreign senior secured loans, senior unsecured loans, and subordinate corporate loans, including loans that may be rated below investment grade or equivalent unrated loans. A Fund may invest in other asset-backed securities that have been offered to investors.

LOAN PARTICIPATIONS AND ASSIGNMENTS

     A Fund may invest in fixed- and floating-rate loans, which investments generally will be in the form of loan participations and assignments of portions of such loans. Participations and assignments involve special types of risk, including credit risk, interest rate risk, liquidity risk, and the risks of being a lender. If a Fund purchases a participation, it may only be able to enforce its rights through the lender, and may assume the credit risk of the lender in addition to the borrower.

INFLATION-INDEXED BONDS

     Inflation-indexed bonds (other than municipal inflation-indexed bonds and certain corporate inflation-indexed bonds, which are more fully described below) are fixed-income securities whose principal value is periodically adjusted according to the rate of inflation. If the index measuring inflation falls, the principal value of inflation-indexed bonds (other than municipal inflation indexed bonds and certain corporate inflation-indexed bonds) will be adjusted downward, and consequently the interest payable on these securities (calculated with respect to a smaller principal amount) will be reduced. Repayment of the original bond principal upon maturity (as adjusted for inflation) is guaranteed in the case of U.S. Treasury inflation-indexed bonds. For bonds that do not provide a similar guarantee, the adjusted principal value of the bond repaid at maturity may be less than the original principal.

     With regard to municipal inflation-indexed bonds and certain corporate inflation-indexed bonds, the inflation adjustment is reflected in the semi-annual coupon payment. As a result, the principal value of municipal inflation-indexed bonds and such corporate inflation-indexed bonds does not adjust according to the rate of inflation.

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

MUNICIPAL BONDS

     Municipal bonds are generally issued by states and local governments and their agencies, authorities and other instrumentalities. Municipal bonds are subject to interest rate, credit and market risk. The ability of an issuer to make payments could be affected by litigation, legislation or other political events or the bankruptcy of the issuer. Lower rated municipal bonds are subject to greater credit and market risk than higher quality municipal bonds. The types of municipal bonds in which a Fund may invest include municipal lease obligations. A Fund may also invest in securities issued by entities whose underlying assets are municipal bonds. Total Return Bond Fund may invest, without limitation, in residual interest bonds, which are created by depositing municipal securities in a trust and dividing the income stream of an underlying municipal bond in two parts, one, a variable rate security and the other, a residual interest bond. The interest rate for the variable rate security is determined by an index or an auction process held approximately every seven to 35 days, while the residual interest bond holder receives the balance of the income from the underlying municipal bond less an auction fee. The market prices of residual interest bonds may be highly sensitive to changes in market rates and may decrease significantly when market rates increase. Since February 2008, a significant number of auction rate municipal bonds have failed to attract buyers, resulting in “failed auctions” and a resetting of the periodic rates to rates in excess of that which would otherwise prevail in the short-term market. The auction failures have affected municipal issuers throughout the nation. Failed auctions generally do not reflect the credit strength of individual issuers, but reflect concerns relating to bond insurers that have insured these auction rate bonds as well as changes in the operation of the auction rate market itself. As an outcome of these failed auctions, governmental issuers have experienced significantly higher service costs on auction rate bonds, and bondholders may experience significantly less liquidity than has been anticipated.

RULE 144A SECURITIES

     A Fund may purchase securities that have been privately placed but that are eligible for purchase and sale by certain qualified institutional buyers, such as the Funds, under Rule 144A (“Rule 144A Securities”) under the Securities Act of 1933, as amended (the “Securities Act”). Calamos Advisors, under the supervision of the Trust’s board of trustees, will consider whether Rule 144A Securities are illiquid and thus subject to a Fund’s restriction of investing no more than a specified percentage of its net assets in securities that are illiquid at the time of purchase. A determination of whether a Rule 144A Security is liquid or not is a question of fact. In making this determination, Calamos Advisors will consider the trading markets for the specific security, taking into account the unregistered nature of a Rule 144A Security. In addition, Calamos Advisors may consider the (1) frequency of trades and quotes, (2) number of dealers and potential purchasers, (3) dealer undertakings to make a market and (4) nature of the security and of marketplace trades (e.g., the time needed to dispose of the security, the method of soliciting offers and the mechanics of transfer). The liquidity of Rule 144A Securities will be monitored and, if as a result of changed conditions, it is determined that a Rule 144A Security is no longer liquid, a Fund’s holdings of illiquid securities would be reviewed to determine what, if any, steps are required to assure that the Fund does not invest more than 10% (or 15% in the case of Global Growth and Income Fund, International Growth Fund, Global Equity Fund, Total Return Bond Fund, Evolving World Growth Fund and Discovery Growth Fund) of its net assets in illiquid securities. Investing in Rule 144A Securities could have the effect of increasing the amount of a Fund’s assets invested in illiquid securities if qualified institutional buyers are unwilling to purchase such securities.

FOREIGN SECURITIES

     Global Growth and Income Fund, International Growth Fund, Global Equity Fund and Evolving World Growth Fund may invest all of their net assets, Total Return Bond Fund may invest up to 35% of its net assets, and each other Fund, except for Multi-Fund Blend, may invest up to 25% of its net assets, in securities of foreign issuers. A foreign security is a security issued by a foreign government or a company organized under the laws of a foreign country. For this purpose, foreign securities do not include American Depositary Receipts (ADRs) or securities guaranteed by a U.S. person, but may include foreign securities in the form of European Depositary Receipts (EDRs), Global Depositary Receipts (GDRs) or other securities representing underlying shares of foreign issuers. Positions in those securities are not necessarily denominated in the same currency as the common stocks into which they may be converted. ADRs are receipts typically issued by an American bank or trust company evidencing ownership of the underlying securities. EDRs are European receipts listed on the Luxembourg Stock Exchange evidencing a similar arrangement. GDRs are U.S. dollar-denominated receipts issued by international banks evidencing ownership of foreign securities. Generally, ADRs, in registered form, are designed for the U.S. securities markets and EDRs and GDRs, in bearer form, are designed for use in foreign securities markets. A Fund may invest in sponsored or unsponsored ADRs. In the case of an unsponsored ADR, a Fund is likely to bear its proportionate share of the expenses of the depository and it may have greater difficulty in receiving shareholder communications than it would have with a sponsored ADR.

     To the extent positions in portfolio securities are denominated in foreign currencies, a Fund’s investment performance is affected by the relative strength or weakness of the U.S. dollar against those currencies. For example, if the dollar falls in value relative to the Japanese yen, the dollar value of a Japanese stock held in the portfolio will rise even though the price of the stock remains unchanged. Conversely, if the dollar rises in value relative to the yen, the dollar value of the Japanese stock will fall. (See discussion of transaction hedging and portfolio hedging below under “Currency Exchange Transactions.”)

     Investors should understand and consider carefully the risks involved in foreign investing. Investing in foreign securities, which are generally denominated in foreign currencies, and utilization of forward foreign currency exchange contracts involve certain considerations comprising both risks and opportunities not typically associated with investing in U.S. securities. These considerations include: fluctuations in exchange rates of foreign currencies; possible imposition of exchange control regulation or currency restrictions that would prevent cash from being brought back to the U.S.; less public information with respect to issuers of securities; less governmental supervision of stock exchanges, securities brokers, and issuers of securities; lack of uniform accounting, auditing and financial reporting standards; lack of uniform settlement periods and trading practices; less liquidity and frequently greater price volatility in foreign markets than in the U.S.; greater costs of buying, holding and selling securities, including brokerage, tax and custody costs; and sometimes less advantageous legal, operational and financial protections applicable to foreign sub-custodial arrangements.

     Although each Fund that invests in foreign securities intends to invest in companies and government securities of countries having stable political environments, there is the possibility of expropriation or confiscatory taxation, seizure or nationalization of foreign bank deposits or other assets, establishment of exchange controls, the adoption of foreign government restrictions, or other adverse political, social or diplomatic developments that could affect investment in these nations.

     Each Fund that invests in foreign securities, other than Global Growth and Income Fund, International Growth Fund, Global Equity Fund and Evolving World Growth Fund, expects that substantially all of its foreign investments will be in developed nations. However, each Fund that invests in foreign securities may invest in the securities of emerging countries. The securities markets of emerging countries are substantially smaller, less developed, less liquid and more volatile than the securities markets of the U.S. and other more developed countries. Disclosure and regulatory standards in many respects are less stringent than in the U.S. and other major markets. There also may be a lower level of monitoring and regulation of emerging markets and the activities of investors in such markets, and enforcement of existing regulations has been extremely limited. Economies in individual emerging markets may differ favorably or unfavorably from the U.S. economy in such respects as growth of gross domestic product, rates of inflation, currency depreciation, capital reinvestment, resource self-sufficiency and balance of payments positions. Many emerging market countries have experienced high rates of inflation for many years, which has had and may continue to have very negative effects on the economies and securities markets of those countries.

CURRENCY EXCHANGE TRANSACTIONS

     Currency exchange transactions may be conducted either on a spot (i.e., cash) basis at the spot rate for purchasing or selling currency prevailing in the foreign exchange market or through forward currency exchange contracts (“forward contracts”). Forward contracts are contractual agreements to purchase or sell a specified currency at a specified future date (or within a specified time period) and price set at the time of the contract. Forward contracts are usually entered into with banks, foreign exchange dealers and broker-dealers, are not exchange traded, and are usually for less than one year, but may be renewed.

     Forward currency exchange transactions may involve currencies of the different countries in which the Funds may invest and serve as hedges against possible variations in the exchange rate between these currencies. Currency exchange transactions are limited to transaction hedging and portfolio hedging involving either specific transactions or portfolio positions, except to the extent described below under “Synthetic Foreign Money Market Positions.” Transaction hedging is the purchase or sale of forward contracts with respect to specific receivables or payables of a Fund accruing in connection with the purchase and sale of its portfolio securities or the receipt of dividends or interest thereon. Portfolio hedging is the use of forward contracts with respect to portfolio security positions denominated or quoted in a particular foreign currency. Portfolio hedging allows a Fund to limit or reduce its exposure in a foreign currency by entering into a forward contract to sell such foreign currency (or another foreign currency that acts as a proxy for that currency) at a future date for a price payable in U.S. dollars so that the value of the foreign denominated portfolio securities can be approximately matched by a foreign denominated liability. A Fund may not engage in portfolio hedging with respect to the currency of a particular country to an extent greater than the aggregate market value (at the time of making such sale) of the securities held in its portfolio denominated or quoted in that particular currency, except that the Fund may hedge all or part of its foreign currency exposure through the use of a basket of currencies or a proxy currency where such currencies or currency act as an effective proxy for other currencies. In such a case, the Fund may enter into a forward contract where the amount of the foreign currency to be sold exceeds the value of the securities denominated in such currency. The use of this basket hedging technique may be more efficient and economical than entering into separate forward contracts for each currency held in the Fund. No Fund may engage in “speculative” currency exchange transactions.

     If a Fund enters into a forward contract, its custodian will segregate liquid assets of the Fund having a value equal to the Fund’s commitment under such forward contract from day to day, except to the extent that the Fund’s forward contract obligation is covered by liquid portfolio securities denominated in, or whose value is tied to, the currency underlying the forward contract. At the maturity of the forward contract to deliver a particular currency, the Fund may either sell the portfolio security related to the contract and make delivery of the currency, or it may retain the security and either acquire the currency on the spot market or terminate its contractual obligation to deliver the currency by purchasing an offsetting contract with the same currency trader obligating it to purchase on the same maturity date the same amount of the currency.

     It is impossible to forecast with absolute precision the market value of portfolio securities at the expiration of a forward contract. Accordingly, it may be necessary for a Fund to purchase additional currency on the spot market (and bear the expense of such purchase) if the market value of the security is less than the amount of currency the Fund is obligated to deliver and if a decision is made to sell the security and make delivery of the currency. Conversely, it may be necessary to sell on the spot market some of the currency received upon the sale of the portfolio security if its market value exceeds the amount of currency the Fund is obligated to deliver.

     If a Fund retains the portfolio security and engages in an offsetting currency transaction, it will incur a gain or a loss to the extent that there has been movement in forward contract prices. If the Fund engages in an offsetting currency transaction, it subsequently may enter into a new forward contract to sell the currency. Should forward prices decline during the period between the Fund’s entering into a forward contract for the sale of a currency and the date it enters into an offsetting contract for the purchase of the currency, the Fund will realize a gain to the extent the price of the currency it has agreed to sell exceeds the price of the currency it has agreed to purchase. Should forward prices increase, the Fund will suffer a loss to the extent the price of the currency it has agreed to purchase exceeds the price of the currency it has agreed to sell. A default on the contract would deprive the Fund of unrealized profits or force the Fund to cover its commitments for purchase or sale of currency, if any, at the current market price.

     Hedging against a decline in the value of a currency does not eliminate fluctuations in the value of a portfolio security traded in that currency or prevent a loss if the value of the security declines. Hedging transactions also preclude the opportunity for gain if the value of the hedged currency should rise. Moreover, it may not be possible for a Fund to hedge against a devaluation that is so generally anticipated that the Fund is not able to contract to sell the currency at a price above the devaluation level it anticipates. The cost to a Fund of engaging in currency exchange transactions varies with such factors as the currency involved, the length of the contract period, and prevailing market conditions. Because currency exchange transactions are usually conducted on a principal basis, no fees or commissions are involved.

SYNTHETIC FOREIGN MONEY MARKET POSITIONS

     A Fund may invest in money market instruments denominated in foreign currencies. In addition to, or in lieu of, such direct investment, a Fund may construct a synthetic foreign money market position by (a) purchasing a money market instrument denominated in one currency, generally U.S. dollars, and (b) concurrently entering into a forward contract to deliver a corresponding amount of that currency in exchange for a different currency on a future date and at a specified rate of exchange. For example, a synthetic money market position in Japanese yen could be constructed by purchasing a U.S. dollar money market instrument, and entering concurrently into a forward contract to deliver a corresponding amount of U.S. dollars in exchange for Japanese yen on a specified date and at a specified rate of exchange. Because of the availability of a variety of highly liquid short-term U.S. dollar money market instruments, a synthetic money market position utilizing such U.S. dollar instruments may offer greater liquidity than direct investment in foreign currency and a concurrent construction of a synthetic position in such foreign currency, in terms of both income yield and gain or loss from changes in currency exchange rates, in general should be similar, but would not be identical because the components of the alternative investments would not be identical.

SWAPS, CAPS, FLOORS AND COLLARS

     A Fund may enter into interest rate, currency, index, credit default and other swaps and the purchase or sale of related caps, floors and collars. A Fund expects to enter into these transactions primarily to preserve a return or spread on a particular investment or portion of its portfolio, to protect against currency fluctuations, as a duration management technique or to protect against any increase in the price of securities the Fund anticipates purchasing at a later date. A Fund will not sell interest rate caps or floors where it does not own securities or other instruments providing the income stream the Fund may be obligated to pay. Interest rate swaps involve the exchange by a Fund with another party of their respective commitments to pay or receive interest, e.g., an exchange of floating rate payments for fixed rate payments with respect to a notional amount of principal. A currency swap is an agreement to exchange cash flows on a notional amount of two or more currencies based on the relative value differential among them and an index swap is an agreement to swap cash flows on a notional amount based on changes in the values of the reference indices. A credit default swap is an agreement to transfer the credit exposure of fixed-income products between parties. The purchase of a cap entitles the purchaser to receive payments on a notional principal amount from the party selling such cap to the extent that a specified index exceeds a predetermined interest rate or amount. The purchase of a floor entitles the purchaser to receive payments on a notional principal amount from the party selling such floor to the extent that a specified index falls below a predetermined interest rate or amount. A collar is a combination of a cap and a floor that preserves a certain return within a predetermined range of interest rates or values.

     A Fund will usually enter into swaps on a net basis, i.e., the two payment streams are 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. Inasmuch as a Fund will segregate assets (or enter into offsetting positions) to cover its obligations under swaps, Calamos Advisors believes such obligations do not constitute senior securities under the 1940 Act and, accordingly, will not treat them as being subject to its borrowing restrictions. A Fund will not enter into any swap, cap, floor or collar transaction unless, at the time of entering into such transaction, the unsecured long-term debt of the securities dealers, financial institutions or other parties with whom the Fund has entered into such a transaction (“Counterparties”), combined with any credit enhancements, is rated at least A by S&P or Moody’s or has an equivalent rating from an NRSRO or is determined to be of equivalent credit quality by Calamos Advisors. If there is a default by the Counterparty, the Fund may have contractual remedies pursuant to the agreements related to the transaction. The swap market has grown substantially in recent years with a large number of banks and investment banking firms acting both as principals and as agents utilizing standardized swap documentation. As a result, the swap market has become relatively liquid, however, some swaps may be considered illiquid. Caps, floors and collars are more recent innovations for which standardized documentation has not yet been fully developed and, accordingly, they are less liquid than swaps.

STRUCTURED PRODUCTS

     A Fund may invest in interests in entities organized and operated for the purpose of restructuring the investment characteristics of certain other investments. This type of restructuring involves the deposit with or purchase by an entity, such as a corporation or trust, of specified instruments and the issuance by that entity of one or more classes of securities (“structured products”) backed by, or representing interests in, the underlying instruments. The term “structured products” as used herein excludes synthetic convertibles. See “Investment Practices—Synthetic Convertible Securities.” The cash flow on the underlying instruments may be apportioned among the newly issued structured products to create securities with different investment characteristics such as varying maturities, payment priorities and interest rate provisions, and the extent of the payments made with respect to structured products is dependent on the extent of the cash flow on the underlying instruments. A Fund may invest in structured products, which represent derived investment positions based on relationships among different markets or asset classes.

     A Fund may also invest in other types of structured products, including, among others, baskets of credit default swaps referencing a portfolio of high-yield securities. A structured product may be considered to be leveraged to the extent its interest rate varies by a magnitude that exceeds the magnitude of the change in the index rate. Because they are linked to their underlying markets or securities, investments in structured products generally are subject to greater volatility than an investment directly in the underlying market or security. Total return on the structured product is derived by linking return to one or more characteristics of the underlying instrument. Because certain structured products of the type in which a Fund may invest may involve no credit enhancement, the credit risk of those structured products generally would be equivalent to that of the underlying instruments. A Fund may invest in a class of structured products that is either subordinated or unsubordinated to the right of payment of another class. Subordinated structured products typically have higher yields and present greater risks than unsubordinated structured products. Although a Fund’s purchase of subordinated structured products would have similar economic effect to that of borrowing against the underlying securities, the purchase will not be deemed to be leverage for purposes of the Fund’s limitations related to borrowing and leverage.

     Certain issuers of structured products may be deemed to be “investment companies” as defined in the 1940 Act. As a result, a Fund’s investments in these structured products may be limited by the restrictions contained in the 1940 Act. Structured products are typically sold in private placement transactions, and there may not be an active trading market for structured products. As a result, certain structured products in which the Fund invests may be deemed illiquid.

LENDING OF PORTFOLIO SECURITIES

     In seeking to earn additional income, a Fund may lend its portfolio securities to qualified parties (typically broker-dealers and banks) who need to borrow securities in order to cover transactions into which they have entered. Any such loan must be continuously secured by collateral in cash or cash equivalents maintained on a current basis in an amount at least equal to the market value of the securities loaned by the Fund. The Fund would continue to receive the equivalent of the interest or dividends paid by the issuer on the securities loaned, and would also receive an additional return that may be in the form of a fixed fee or a percentage of income earned on the collateral. The Fund may experience losses as a result of a diminution in value of its cash collateral investments. The Fund may pay reasonable fees to persons unaffiliated with the Fund for services in arranging these loans. The Fund would have the right to call the loan and obtain the securities loaned at any time on notice of not less than five business days. The Fund would not have the right to vote the securities during the existence of the loan; however, the Fund may attempt to call back the loan and vote the proxy if time permits prior to the record date. In the event of bankruptcy or other default of the borrower, the Fund could experience both delays in liquidating the loan collateral or recovering the loaned securities and losses, including (a) possible decline in the value of the collateral or in the value of the securities loaned during the period while the Fund seeks to enforce its rights thereto, (b) possible subnormal levels of income and lack of access to income during this period, and (c) expenses of enforcing its rights. In an effort to reduce these risks, the Fund’s securities lending agent will monitor, and report to Calamos Advisors on, the creditworthiness of the firms to which the Fund lends securities.

REPURCHASE AGREEMENTS

     As part of its strategy for the temporary investment of cash, a Fund may enter into “repurchase agreements” pertaining to U.S. Government securities with member banks of the Federal Reserve System or primary dealers (as designated by the Federal Reserve Bank of New York) in such securities. Each Fund may invest in repurchase agreements, provided that Global Growth and Income Fund, International Growth Fund, Global Equity Fund, Total Return Bond Fund, Evolving World Growth Fund and Discovery Growth Fund may not invest more than 15%, and each other Fund may not invest more than 10%, of its net assets in illiquid securities, including repurchase agreements maturing in more than seven days, and any other illiquid securities. A repurchase agreement arises when a Fund purchases a security and simultaneously agrees to resell it to the vendor at an agreed upon future date. The resale price is greater than the purchase price, reflecting an agreed upon market rate of return that is effective for the period of time the Fund holds the security and that is not related to the coupon rate on the purchased security. Such agreements generally have maturities of no more than seven days and could be used to permit a Fund to earn interest on assets awaiting long term investment. A Fund requires continuous maintenance by the custodian for the Fund’s account in the Federal Reserve/Treasury Book Entry System of collateral in an amount equal to, or in excess of, the market value of the securities that are the subject of a repurchase agreement. In the event of a bankruptcy or other default of a seller of a repurchase agreement, a Fund could experience both delays in liquidating the underlying security and losses, including: (a) possible decline in the value of the underlying security during the period while the Fund seeks to enforce its rights thereto; (b) possible subnormal levels of income and lack of access to income during this period; and (c) expenses of enforcing its rights. In an effort to reduce these risks, Calamos Advisors will monitor the creditworthiness of the firms with which a Fund enters into repurchase agreements.

OPTIONS ON SECURITIES, INDEXES AND CURRENCIES

     A Fund may purchase and sell (write) put options and call options on securities, indexes or foreign currencies. A Fund may purchase agreements, sometimes called cash puts, that may accompany the purchase of a new issue of bonds from a dealer.

     A put option gives the purchaser of the option, upon payment of a premium, the right to sell, and the writer the obligation to buy, the underlying security, commodity, index, currency or other instrument at the exercise price. For instance, a Fund’s purchase of a put option on a security might be designed to protect its holdings in the underlying instrument (or, in some cases, a similar instrument) against a substantial decline in the market value by giving such Fund the right to sell such instrument at the option exercise price. A call option, upon payment of a premium, gives the purchaser of the option the right to buy, and the seller the obligation to sell, the underlying instrument at the exercise price. A Fund’s purchase of a call option on a security, financial future, index, currency or other instrument might be intended to protect it against an increase in the price of the underlying instrument that it intends to purchase in the future by fixing the price at which it may purchase such instrument.

     A Fund may purchase and sell (write) exchange listed options and over-the-counter options (“OTC options”). Exchange listed options are issued by a regulated intermediary such as the Options Clearing Corporation (“OCC”), which guarantees the performance of the obligations of the parties to such options. The discussion below uses the OCC as an example, but is also applicable to other financial intermediaries.

     With certain exceptions, OCC issued and exchange listed options generally settle by physical delivery of the underlying security or currency, although in the future cash settlement may become available. Index options and Eurodollar instruments are cash settled for the net amount, if any, by which the option is “in-the-money” (i.e., where the value of the underlying instrument exceeds, in the case of a call option, or is less than, in the case of a put option, the exercise price of the option) at the time the option is exercised. Frequently, rather than taking or making delivery of the underlying instrument through the process of exercising the option, listed options are closed by entering into offsetting purchase or sale transactions that do not result in ownership of the new option.

     OTC options are purchased from or sold to sellers or purchasers (“Counterparties”) through direct bilateral agreement with the Counterparties. In contrast to exchange listed options, which generally have standardized terms and performance mechanics, all the terms of an OTC option, including such terms as method of settlement, term, exercise price, premium, guarantees and security, are set by negotiation of the parties. A Fund will only sell (write) OTC options (other than OTC currency options) that are subject to a buy-back provision permitting the Fund to

require the Counterparty to sell the option back to the Fund at a formula price within seven days. A Fund generally is expected to enter into OTC options that have cash settlement provisions, although it is not required to do so. The staff of the Securities and Exchange Commission (the “SEC”) currently takes the position that OTC options purchased by a fund, and portfolio securities “covering” the amount of a fund’s obligation pursuant to an OTC option sold by it (or the amount of assets equal to the formula price for the repurchase of the option, if any, less the amount by which the option is “in the money”) are illiquid, and are subject to a fund’s limitation on investing no more than 10% of its net assets (or 15% in the case of Global Growth and Income Fund, International Growth Fund, Global Equity Fund, Total Return Bond Fund, Evolving World Growth Fund and Discovery Growth Fund) in illiquid securities.

     A Fund may also purchase and sell (write) options on securities indices and other financial indices. Options on securities indices and other financial indices are similar to options on a security or other instrument except that, rather than settling by physical delivery of the underlying instrument, they settle by cash settlement, i.e., an option or an index gives the holder the right to receive, upon exercise of the option, an amount of cash if the closing level of the index upon which the option is based exceeds, in the case of a call, or is less than, in the case of a put, the exercise price of the option (except if, in the case of an OTC option, physical delivery is specified). This amount of cash is equal to the excess of the closing price of the index over the exercise price of the option, which also may be multiplied by a formula value. The seller of the option is obligated, in return for the premium received, to make delivery of this amount. The gain or loss on an option on an index depends on price movements in the instruments making upon the market, market segment, industry or other composite on which the underlying index is based, rather than price movements in individual securities, as is the case with respect to options on securities.

     A Fund will sell (write) call options and put options only if they are “covered.” For example, a call option written by a Fund will require such Fund to hold the securities subject to the call (or securities convertible into the needed securities without additional consideration) or to segregate cash or liquid assets sufficient to purchase and deliver the securities if the call is exercised. A call option sold by a Fund on an index will require such Fund to own portfolio securities that correlate with the index or to segregate cash or liquid assets equal to the excess of the index value over the exercise price on a current basis. A put option written by a Fund requires such Fund to segregate cash or liquid assets equal to the exercise price.

     OTC options entered into by a Fund and OCC issued and exchange listed index options will generally provide for cash settlement. As a result, when a Fund sells (writes) these instruments, it will only segregate an amount of cash or liquid assets equal to its accrued net obligations, as there is no requirement for payment or delivery of amounts in excess of the net amount. These amounts will equal 100% of the exercise price in the case of a non cash-settled put, the same as an OCC guaranteed listed option sold by a Fund, or the “in-the-money” amount plus any sell-back formula amount in the case of a cash-settled put or call. In addition, when a Fund sells (writes) a call option on an index at a time when the in-the-money amount exceeds the exercise price, the Fund will segregate, until the option expires or is closed out, cash or cash equivalents equal in value to such excess. OCC issued and exchange listed options sold by a Fund other than those above generally settle with physical delivery, or with an election of either physical delivery or cash settlement and the Fund will segregate an amount of cash or liquid assets equal to the full value of the option. OTC options settling with physical delivery, or with an election of either physical delivery or cash settlement, will be treated the same as other options settling with physical delivery.

     If an option written by a Fund expires, the Fund realizes a capital gain equal to the premium received at the time the option was written. If an option purchased by a Fund expires, the Fund realizes a capital loss equal to the premium paid.

     A Fund will realize a capital gain from a closing purchase transaction if the cost of the closing option is less than the premium received from writing the option, or, if it is more, such Fund will realize a capital loss. If the premium received from a closing sale transaction is more than the premium paid to purchase the option, a Fund will realize a capital gain or, if it is less, the Fund will realize a capital loss. The principal factors affecting the market value of a put or a call option include supply and demand, interest rates, the current market price of the underlying security or index in relation to the exercise price of the option, the volatility of the underlying security or index, and the time remaining until the expiration date.

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

     RISKS ASSOCIATED WITH OPTIONS. There are several risks associated with transactions in options. For example, there are significant differences between the securities markets, the currency markets and the options markets that could result in an imperfect correlation among these markets, causing a given transaction not to achieve Calamos Advisors’ objective. A decision as to whether, when and how to use options involves the exercise of skill and judgment, and even a well-conceived transaction may be unsuccessful to some degree because of market behavior or unexpected events. A Fund’s ability to utilize options successfully will depend on Calamos Advisors’ ability to predict pertinent market investments, which cannot be assured.

     A Fund’s ability to close out its position as a purchaser or seller (writer) of an OCC or exchange listed put or call option is dependent, in part, upon the liquidity of the option market. Among the possible reasons for the absence of a liquid option market on an exchange are: (i) insufficient trading interest in certain options; (ii) restrictions on transactions imposed by an exchange; (iii) trading halts, suspensions or other restrictions imposed with respect to particular classes or series of options or underlying securities including reaching daily price limits; (iv) interruption of the normal operations of the OCC or an exchange; (v) inadequacy of the facilities of an exchange or OCC to handle current trading volume; or (vi) a decision by one or more exchanges to discontinue the trading of options (or a particular class or series of options), in which event the relevant market for that option on that exchange would cease to exist, although outstanding options on that exchange would generally continue to be exercisable in accordance with their terms. If a Fund were unable to close out an option that it has purchased on a security, it would have to exercise the option in order to realize any profit or the option would expire and become worthless. If a Fund were unable to close out a covered call option that it had written on a security, it would not be able to sell the underlying security until the option expired. As the writer of a covered call option on a security, a Fund foregoes, during the option’s life, the opportunity to profit from increases in the market value of the security covering the call option above the sum of the premium and the exercise price of the call. As the writer of a covered call option on a foreign currency, a Fund foregoes, during the option’s life, the opportunity to profit from any currency appreciation.

     The hours of trading for listed options may not coincide with the hours during which the underlying financial instruments are traded. To the extent that the option markets close before the markets for the underlying financial instruments, significant price and rate movements can take place in the underlying markets that cannot be reflected in the option markets.

     Unless the parties provide for it, there is no central clearing or guaranty function in an OTC option. As a result, if the Counterparty (as described above under “Options on Securities, Indexes and Currencies”) fails to make or take delivery of the security, currency or other instrument underlying an OTC option it has entered into with a Fund or fails to make a cash settlement payment due in accordance with the terms of that option, a Fund will lose any premium it paid for the option as well as any anticipated benefit of the transaction. Accordingly, Calamos Advisors must assess the creditworthiness of each such Counterparty or any guarantor or credit enhancement of the Counterparty’s credit to determine the likelihood that the terms of the OTC option will be satisfied.

     A Fund may purchase and sell (write) call options on securities indices and currencies. All calls sold by a Fund must be “covered.” Even though a Fund will receive the option premium to help protect it against loss, a call sold by a Fund exposes such Fund during the term of the option to possible loss of opportunity to realize appreciation in the market price of the underlying security or instrument and may require the Fund to hold the security or instrument that it might otherwise have sold. A Fund may purchase and sell (write) put options on securities indexes and currencies. In selling (writing) put options, there is a risk that the Fund may be required to buy the underlying index or currency at a disadvantageous price above the market price.

FUTURES CONTRACTS AND OPTIONS ON FUTURES CONTRACTS

     A Fund may enter into interest rate futures contracts, index futures contracts, volatility index futures contracts and foreign currency futures contracts. An interest rate, index, volatility index or foreign currency futures contract provides for the future sale by one party and purchase by another party of a specified quantity of a financial instrument or the cash value of an index(1) at a specified price and time. A public market exists in futures contracts covering a number of indexes (including, but not limited to, the Standard & Poor’s 500 Index, the Russell 2000 Index, the Value Line Composite Index, and the New York Stock Exchange Composite Index) as well as financial instruments (including, but not limited to, U.S. Treasury bonds, U.S. Treasury notes, Eurodollar certificates of deposit and foreign currencies). Other index and financial instrument futures contracts are available and it is expected that additional futures contracts will be developed and traded. A Fund may enter into such contract if, in Calamos Advisors’ opinion, such contract meets the Fund’s investment parameters.

     A Fund may purchase and write call and put futures options. Futures options possess many of the same characteristics as options on securities, indexes and foreign currencies (discussed above). A futures option gives the holder the right, in return for the premium paid, to assume a long position (call) or short position (put) in a futures contract at a specified exercise price at any time during the period of the option. Upon exercise of a call option, the holder acquires a long position in the futures contract and the writer is assigned the opposite short position. In the case of a put option, the opposite is true. A Fund might, for example, use futures contracts to hedge against or gain exposure to fluctuations in the general level of stock prices, anticipated changes in interest rates or currency fluctuations that might adversely affect either the value of a Fund’s securities or the price of the securities that the Fund intends to purchase. Although other techniques could be used to reduce or increase a Fund’s exposure to stock price, interest rate and currency fluctuations, a Fund may be able to achieve its desired exposure more effectively and perhaps at a lower cost by using futures contracts and futures options.

     A Fund will only enter into futures contracts and futures options that are standardized and traded on an exchange, board of trade or similar entity, or quoted on an automated quotation system.

     The success of any futures transaction by a Fund depends on Calamos Advisors’ correctly predicting changes in the level and direction of stock prices, interest rates, currency exchange rates and other factors. Should those predictions be incorrect, the Fund’s return might have been better had the transaction not been attempted; however, in the absence of the ability to use futures contracts, Calamos Advisors might have taken portfolio actions in anticipation of the same market movements with similar investment results, but, presumably, at greater transaction costs.

     When a Fund makes a purchase or sale of a futures contract, the Fund is required to deposit with its custodian (or broker, if legally permitted) a specified amount of cash or U.S. Government securities or other securities acceptable to the broker (“initial margin”). The margin required for a futures contract is set by the exchange on which the contract is traded and may be modified during the term of the contract, although the Fund’s broker may require margin deposits in excess of the minimum required by the exchange. The initial margin is in the nature of a performance bond or good faith deposit on the futures contract, which is returned to the Fund upon termination of the contract, assuming all contractual obligations have been satisfied. The Fund expects to earn interest income on its initial margin deposits. A futures contract held by the Fund is valued daily at the official settlement price of the exchange on which it is traded. Each day the Fund pays or receives cash, called “variation margin,” equal to the daily change in value of the futures contract. This process is known as “marking-to-market.” Variation margin paid or received by the Fund does not represent a borrowing or loan by the Fund but is instead settlement between the Fund and the broker of the amount one would owe the other if the futures contract had expired at the close of the previous day. In computing daily net asset value, the Fund will mark-to-market its open futures positions.

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