CME Group Inc. Announces Date of Second-Quarter 2008 Earnings Release,

by Chicago Mercantile Exchange 24 Jun 22:07

CHICAGO, June 24 /PRNewswire-FirstCall/ — CME Group Inc. (NYSE:
CME)(NASDAQ: CME) will announce earnings for the second quarter of 2008
before the financial markets open on Tuesday, July 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) 718-5107 if calling from within the United States or (719)
325-4800 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 Inc.

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

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