CALAMOS Releases Monthly Closed-End Fund Portfolio Data and Special Report


NAPERVILLE, Ill., May 10, 2004 (PRIMEZONE) -- Calamos Investments has released the monthly portfolio data for March and April including asset allocation, quality allocation, representative holdings, sector weightings and other fund characteristics for the Calamos Convertible Opportunities and Income Fund (NYSE:CHI) (Cusip No.: 128117108) and the Calamos Convertible and High Income Fund (NYSE:CHY) (Cusip No.: 12811P108).

In addition to the regular commentary, the firm has posted a report supporting its belief that rising interest rates signal a stronger economy with potential to boost equity-sensitive securities such as those held within the Calamos closed-end funds. The report also discusses steps that the Funds took to seek to offset the potential negative effects of a rise in short-term rates on the cost of leverage.

The report and monthly portfolio data will be posted on Calamos' website at www.calamos.com. Printed copies can be obtained by calling (800) 582-6959.

About CALAMOS

CALAMOS INVESTMENTS provides professional money management services to clients that include major corporations, public and private institutions, pension funds, insurance companies and individuals and is an investment advisor to open-end and closed-end funds. It offers high yield, equity, global, growth and income, convertible, and alternative investment strategies. Engaged in securities research and investing since 1977, the firm manages approximately $29.0 billion in assets as of March 31, 2004.

Past performance is no guarantee of future results. You can purchase or sell common shares daily. Like any other stock, market price will fluctuate with the market. Upon sale, your shares may have a market price that is above or below net asset value and may be worth more or less than your original investment. Due to ongoing market volatility, performance is subject to substantial short-term fluctuations.

The Funds invest in lower-rated fixed-income securities, often referred to as "junk bonds," which generally present greater risks than higher quality securities, because of the greater likelihood that the company issuing the lower-rated securities will default on income and principal payments. Shares of closed-end funds frequently trade at a market price that is below their net asset value.



            

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