Calamos Institutional Strategies

Performance as of 3/31/08

  Average Annual Total Return
After fee returns in shaded area
Calamos Strategy Inception 1-Year 5-Year 10-Year Since Inception
Growth
1/1/91 4.87% 15.57%  15.73% 18.15%
4.05% 14.58% 14.77% 17.16%
Blue Chip
1/1/04 0.77% - - 7.78%
-0.22% - - 6.72%
Value
2/1/02 -2.61% 14.21% - 7.20%
-3.57% 13.09% - 6.14%
International Growth
4/1/05 8.96% - - 20.03%
7.90% - - 18.86%
Global Opportunities
10/1/96 1.77% 15.10% 10.46% 12.54%
0.81% 13.99% 9.39% 11.44%
Global Equity
10/1/96 6.84% - - 6.84%
5.70% - - 5.70%
Growth and Income
1/1/89 0.62% 11.46% 11.58% 14.91%
-0.04% 10.75% 10.81% 14.09%
High Yield
11/1/99 -1.00% 9.45% - 8.44%
-1.73% 8.64% - 7.64%
Convertible
10/1/79 1.63% 9.20% 7.32% 10.73%
1.13% 8.66% 6.80% 10.12%
Government Money Market
5/16/07 - - - -
- - - -

Government Money
Market Fund

Data as of 7/23/08
Total Net Assets $703.0 M
Daily Yield 2.11%
SEC 7-Day Yield 2.08%
Compound 7-Day 2.10%
SEC 30-Day Yield 2.07%
Compound 30-Day 2.09%
Average Days to Maturity 55
Daily Factor 0.00005651
See Notes >

For more information, please contact us at 630-245-8715 / toll free 800-323-9943 or email crm@calamos.com.

Performance data quoted represents past performance, which is no guarantee of future results. Current performance may be lower or higher than the performance quoted.
Average annual total return measures net investment income and capital gain or loss from portfolio investments as an annualized average assuming reinvestment of dividends and capital gains distributions. The S&P performance since inception of the Blue Chip Strategy (1/1/04) is 6.11%; since inception of the International Growth Strategy (4/1/05) is 5.85%; since inception of the High Yield Strategy (11/1/99) is 1.32%; and since inception of the Value Strategy (2/1/02) is 4.46%.

Returns presented for the Growth, Blue Chip, Value, International Growth, Global Opportunities, Growth and Income, High Yield and Convertible strategies reflect those of the Growth, Blue Chip, Value, International Growth, Global Opportunities, Growth and Income, High Yield and Institutional Convertible Composites, respectively.

The Growth and Income Composite is an actively managed composite comprised of all fully discretionary, feepaying accounts of $250,000 or more, managed by Calamos Advisors LLC.

The Growth, Blue Chip, Value, International Growth, Global Opportunities and High Yield Composites are actively managed composites comprised of all fully discretionary, fee-paying accounts of $500,000 or more, managed by Calamos Advisors LLC.

The Institutional Convertible Composite is an actively managed composite comprised of all fully discretionary, feepaying accounts of $1,000,000 or more, managed by Calamos Advisors LLC. Returns cited are net of commission and other similar fees charged on securities transactions and include reinvestment of net realized gains and interest. Fees include the investment advisory fee charge by Calamos Advisors LLC. Returns greater than 12 months are annualized.

Source: Calamos Advisors LLC and Russell/Mellon Analytical Services LLC.

Before investing, carefully consider the Fund's investment objectives, risks, charges and expenses. Please see the prospectus containing this and other information or call 800-582-6959. Read it carefully.

Important Fund Information
An investment in the Government Money Market Fund is not insured or guaranteed by the Federal Deposit Insurance Corporation or any other government agency. Although the Fund seeks to preserve the value of your investment at $1.00 per share, this share price is not guaranteed and you could lose money by investing in the Fund.

NOTES

Current (SEC) Yield—Reflects the dividends and interest earned by the Fund during the 7-day and 30-day periods ended as of the date stated above after deducting the Government Money Market Fund's expenses for that same period.

Compound (Effective) 7-day and 30-day Yields—Calculated similarly, although these figures are slightly higher than the Fund's 7-day and 30-day SEC Yields because of the effects of compounding. The 7-day and 30-day Compound Effective Yields assume that income earned from the Fund's investments is reinvested and generating additional income.

Calamos Advisors LLC is a federally registered investment advisor. Part II of Form ADV, which provides background information about the firm and its business practices, is available upon written request to:

Calamos Advisors LLC
2020 Calamos Court
Naperville, IL 60563-2787
Attn: Compliance Officer

5110 rev 0308


CALAMOS

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