ADVISORY, July 23, 2008 (PRIME NEWSWIRE) --

 What:
 Craig Donohue, CME Group Chief Executive Officer, and Jamie Parisi,
 CME Group Chief Financial Officer, will preside over the closing bell
 to celebrate the CME Group's single listing of its Common Stock on
 The NASDAQ Stock Market.

 CME Group ceased listing on the NYSE on July 11, 2008, and commenced
 trading on The NASDAQ Global Select Market on July 14, 2008, under
 the symbol (Nasdaq:CME). CME Group has been listed on the NYSE since
 December 2002 and dually listed its stock on the NASDAQ in May 2005.

 The CME Group and NASDAQ OMX Group have also expanded a long-term
 partnership on exclusive Nasdaq 100(r) license extended through 2019.

 Where:
 NASDAQ MarketSite - 4 Times Square - 43rd & Broadway - Broadcast Studio

 When:
 Thursday, July 24, 2008, at 4:00 p.m. EDT

 Contacts:
 Allan Schoenberg
 Allan.Schoenberg@cmegroup.com

 NASDAQ MarketSite:
 Jolene Libretto; 646.441.5220; 347.219.9539
 Jolene.Libretto@nasdaqomx.com

Feed Information:

The closing bell is available from 3:50 p.m. to 4:05 p.m. on Galaxy 3C, Transponder 9. The downlink frequency is 4040 Vertical; Audio 6.2-6.8. The feed can also be found on Waterfront fiber 1623. If you have any questions, please contact Jolene Libretto at (646) 441-5220.

Radio Feed:

An audio transmission of the closing bell is also available from 3:50 p.m. to 4:05 p.m. on uplink IA6 C band / transponder 24, downlink frequency 4180 horizontal. The feed can be found on Waterfront fiber 1623 as well.

Webcast:

A live Webcast of the NASDAQ Closing Bell will be available at: http://www.nasdaq.com/about/marketsitetowervideo.asx

Photos:

To obtain a hi-resolution photograph of the Market Close, please go to http://www.nasdaq.com/reference/marketsite_events.stm and click on the market close of your choice.

About CME Group:

CME Group (www.cmegroup.com) is the world's largest and most diverse derivatives exchange. Formed by the 2007 merger of the Chicago Mercantile Exchange (CME) and the Chicago Board of Trade (CBOT), 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 is listed on NASDAQ under the symbol "CME."