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Chicago Board Of Trade Officials To Ring CBOE's Bell To Open Trading In Options On CBOT Holdings, Inc. (BOT) On Tuesday, April 25th At 8:30 A.M.

Date 24/04/2006

The Chicago Board Options Exchange (CBOE) today announced that Chicago Board of Trade (CBOT) Chairman Charles Carey, President and CEO Bernard Dan and CBOT board members will ring in the first day of trading options on the stock of CBOT Holdings, Inc (NYSE and CBOE ticker symbol BOT) at CBOE on Tuesday, April 25, 2006 at 8:30 a.m. CDT. (Photo Editors note: photo opportunity information on page 2 of this news release).

CBOE, the world's largest options exchange, will start trading, for the first time, options on CBOT Holdings, Inc., the parent company of the Chicago Board of Trade, the second largest futures exchange in the United States. BOT stock was listed for the first time on the New York Stock Exchange in October 2005.

"We are especially pleased to list BOT options and to celebrate with our friends the great success that the Board of Trade has realized since the initial public offering of their stock," said CBOE Chairman and Chief Executive Officer William J. Brodsky. "It is especially fitting that we should commemorate this day together as another milestone in the long history that we have shared since CBOE was founded by members of the Chicago Board of Trade 33 years ago."

CBOE was started by members of the Chicago Board of Trade on April 26, 1973, thereby creating the first listed options market. Volume on the first day of trading was 911 contracts, on 16 stocks, trading call options only. Volume for that first year of options trading totaled 1.1 million contracts. Today, average daily volume at CBOE is 2.4 million contracts, and more than 468 million option contracts were traded at CBOE last year. CBOE has continued as a leader in the industry it founded, creating innovative new products, such as the CBOE Volatility Index (VIX), and transforming the way options are traded, with the creation of the first Hybrid Trading System, blending the best elements of floor-based trading with the advantages of screen-based trading.

For additional information about the CBOE and its products, visit the CBOE website at http://www.cboe.com/. For more information on new listings, visit the Trading Tools section at: http://www.cboe.com/NewListings. CBOE, the world's largest options exchange and creator of listed options, is regulated by the Securities and Exchange Commission (SEC).