News Release

CME Group Inc. Announces Date of First-Quarter 2008 Earnings Release, Conference Call

Tue Mar 25 2008

CHICAGO, March 25 /PRNewswire-FirstCall/ -- CME Group Inc. (NYSE: CME)(NASDAQ: CME) will announce earnings for the first quarter of 2008 before the financial markets open on Tuesday, April 22, 2008. The company has scheduled an investor conference call that day at 8:30 a.m. Eastern time (7:30 a.m. Central time).

A live audio Webcast of the conference call will be available on the Investor Relations section of the company's Web site, http://www.cmegroup.com/. Following the conference call, an archived recording will be available at the same site. Those wishing to listen to the live conference via telephone should dial (877) 718-5108 if calling from within the United States or (719) 325-4815 if calling from outside the United States, at least 10 minutes before the call begins.

CME Group (http://www.cmegroup.com/) is the world's largest and most diverse exchange. Formed by the 2007 merger of the Chicago Mercantile Exchange Holdings and CBOT Holdings, CME Group serves the risk management needs of customers around the globe. As an international marketplace, CME Group brings buyers and sellers together on the CME Globex electronic trading platform and on its trading floors. CME Group offers the widest range of benchmark products available across all major asset classes, including futures and options based on interest rates, equity indexes, foreign exchange, agricultural commodities and alternative investment products such as weather and real estate. CME Group's Class A common stock is traded on the New York Stock Exchange and the Nasdaq Global Select Market under the symbol "CME."

The Globe logo, CME, Chicago Mercantile Exchange, CME Group, Globex and E-mini, are trademarks of Chicago Mercantile Exchange Inc. CBOT and Chicago Board of Trade are trademarks of the Board of Trade of the City of Chicago. All other trademarks are the property of their respective owners. Further information about CME Group and its products can be found at http://www.cmegroup.com/.

CME-G

SOURCE: CME Group

CONTACT: Media, Anita Liskey, +1-312-466-4613, or William Parke,
+1-312-930-3467, or Investors, John Peschier, +1-312-930-8491, all of CME
Group, news@cmegroup.com

Web site: http://www.cmegroup.com/
http://www.cmegroup.mediaroom.com/

Corporate Communications

+1 312 930 3434
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