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Chicago Mercantile Exchange Holdings Inc. Declares Regular Quarterly Dividend - Quarterly Dividend Increased 50 Percent

Date 06/11/2003

Chicago Mercantile Exchange Holdings Inc. (NYSE: CME) yesterday announced that its Board of Directors has declared a regular quarterly dividend of 21 cents per share, payable on Dec. 26, 2003 to Class A and Class B shareholders of record on Dec. 10, 2003.

As announced in September, CME has modified its dividend payout policy, raising its annual dividend target to 30 percent of the prior year's cash earnings, which were approximately $88 million in 2002. Previously, the annual dividend target was approximately 20 percent of the prior year's cash earnings, or 14 cents per share in each of the first three quarters of 2003. The amount and payment of any dividend remains subject to the discretion of the Board of Directors.

Chicago Mercantile Exchange Holdings Inc. became the first publicly traded U.S. financial exchange on Dec. 6, 2002. The company was added to the Russell 1000® Index on July 1, 2003. It is the parent company of Chicago Mercantile Exchange Inc. (www.cme.com), the largest futures exchange in the United States. As an international marketplace, CME brings together buyers and sellers on its trading floors and GLOBEX® electronic trading platform. CME offers futures contracts and options on futures primarily in four areas: interest rates, stock indexes, foreign exchange and commodities. The exchange moved about $1.5 billion per day in settlement payments in the first nine months of 2003 and managed $29.6 billion in collateral deposits at Sept. 30, 2003.

Statements in this news release that are not historical facts are forward-looking statements. These statements are not guarantees of future performance and involve risks, uncertainties and assumptions that are difficult to predict. Therefore, actual outcomes and results may differ materially from what is expressed or implied in any forward-looking statements. More detailed information about factors that may affect our performance may be found in our filings with the Securities and Exchange Commission, including our most recent Annual Report on Form 10-K, which is available in the Investor Information section of the CME Web site. We undertake no obligation to publicly update any forward-looking statements, whether as a result of new information, future events or otherwise.

Chicago Mercantile Exchange, CME and GLOBEX are registered trademarks of Chicago Mercantile Exchange Inc. Further information about Chicago Mercantile Exchange Holdings Inc. and Chicago Mercantile Exchange Inc. is available on the CME Web site at www.cme.com.