News Release

CME to List Seven New Weather Contracts in Cities in the United States and Europe

Mon Jun 20 2005

Exchange Continues to Build on the Success of its Innovation in Weather Derivatives CHICAGO, June 14, 2005 - CME, the largest U.S. futures exchange, today announced it will expand its innovative weather futures and options product lines with seven new contracts, three in the United States and four in Europe, which are scheduled to launch on Monday, June 20 (Sunday night, June 19 on CME® Globex®). The three U.S. cities include Baltimore, Detroit and Salt Lake City and the four European cities include Barcelona, Essen, Madrid and Rome. CME currently lists weather futures and options on futures contracts based on aggregate temperatures for 22 cities, including 15 in the U.S., five in Europe and two in Japan. “Weather is one of the largest variables impacting economic activity and corporate performance across many industries,” said Rick Redding, Managing Director, Products and Services for CME.. “CME weather futures contracts provide the marketplace with important hedging tools that allow businesses worldwide to manage something that has always seemed unmanageable. If organizations today are not hedging the weather they are speculating.” The new U.S. listings will include Heating Degree Day (HDD) and Cooling Degree Day (CDD) on both Monthly and Seasonal futures and options and the new European listings will include Heating Degree Day (HDD) and Cumulative Average Temperature (CAT) on both Monthly and Seasonal futures and options. Product specifications are identical to the existing U.S. and European Cities. Cities in U.S. will be priced in U.S. dollars and cities in Europe will be priced in British Pounds. The futures contracts will trade only on the exchange’s electronic trading platform from 5 p.m. to 3:15 p.m. Chicago time the following day. Trading on all of the contracts will terminate at 9 a.m. Chicago time on the first Exchange business day that is at least two calendar days after the last calendar day of the respective contract period. Options on all CME weather futures will be traded on CME’s trading floor from 8:30 a.m. to 3:15 p.m. Chicago time. On April 13, 2005, CME announced that year-to-date trading of futures and options on futures in its weather derivative contracts already surpassed the total volume of contracts traded in 2004. CME Weather traded in 2005 has now reached a total of 307,000 contracts as of the close of trading on Monday, June 13, 2005, compared with 123,000 in 2004. In May 2005, CME for the first time surpassed 100,000 weather contracts traded in a single month. For more information on trading weather futures at CME, visit the exchange’s Website at www.cme.com/edu/comwea/tradingwea/. Chicago Mercantile Exchange Inc. (www.cme.com) is the largest futures exchange in the United States. As an international marketplace, CME brings together buyers and sellers on CME Globex electronic trading platform and on its trading floors. CME offers futures and options on futures primarily in four product areas: interest rates, stock indexes, foreign exchange and commodities. The exchange moved about $1.5 billion per day in settlement payments in first quarter 2005 and managed $44.4 billion in collateral deposits as of March 31, 2005, including $4.3 billion in deposits for non-CME products. CME is a wholly owned subsidiary of Chicago Mercantile Exchange Holdings Inc. (NYSE, NASDAQ: CME), which is part of the Russell 1000® Index. 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 annualreport on Form 10-K, which can be obtained at its Web site at www.sec.gov. 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, the globe logo and CME Globex are registered trademarks of Chicago Mercantile Exchange Inc. E-mini is a trademark of CME. CLEARING 21 is a registered trademark of CME and New York Mercantile Exchange, Inc. S&P, S&P 500, NASDAQ-100, Nikkei 225, Russell 1000, Russell 2000, TRAKRS, Total Return Asset Contracts and other trade names, service marks, trademarks and registered trademarks that are not proprietary to Chicago Mercantile Exchange Inc. are the property of their respective owners, and are used herein under license.

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