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The Options Clearing Corporation Announces New Security Futures Open Interest Record

CHICAGO, July 26, 2005 - The Options Clearing Corporation (OCC) announced today that open interest in security futures passed the 1 million contract milestone for the first time on July 25. At the close of trading open interest stood at 1,031,912 for security futures cleared by OCC and traded at OneChicago and the CBOE Futures Exchange.

Open interest is the total number of contracts that have not yet been offset or taken to delivery. It is seen as an indicator of longer term investing in the product.

Last year, OCC cleared about 2.3 million security futures contracts. Last week, that total had been surpassed and about 2.8 million security futures contracts had been cleared through Monday.

"This open interest milestone signals continued growth of the security futures product and OCC stands ready to efficiently handle continuing volume increases," said Michael Cahill, OCC President and Chief Operating Officer. "For both futures and options, OCC is a customer-driven clearing organization delivering world-class risk management, clearance and settlement services at a reasonable and transparent cost."

About OCC

OCC, founded in 1973, is the largest clearing organization in the world for options and was the first clearing house to receive a 'AAA' credit rating from Standard & Poor's Corporation. Operating under the jurisdiction of the Securities and Exchange Commission and the Commodity Futures Trading Commission, OCC provides clearing and settlement services for the American Stock Exchange, the Boston Options Exchange, Chicago Board Options Exchange, CBOE Futures Exchange, International Securities Exchange, OneChicago, Pacific Exchange, Philadelphia Stock Exchange and Philadelphia Board of Trade. More information about OCC is available through its Web site at www.optionsclearing.com.