News Release

CME Reports May 2006 Volume Averaged a Record 5.4 Million Contracts Per Day, Up 34 Percent from Year-Ago Period

Thu Jun 01 2006

CHICAGO, June 1 /PRNewswire-FirstCall/ -- CME, the world's largest and most diverse financial exchange, today announced May volume averaged a record 5.4 million contracts per day, up 34 percent from May 2005. Total monthly volume in May 2006 was 119 million contracts. Average daily volume on the CME Globex® electronic trading platform increased 35 percent from May 2005 to a record 4.0 million contracts per day, representing 74 percent of total exchange volume. Total options volume was 1.1 million contracts per day, up 54 percent month over month. Electronic options averaged a record 111,000 contracts per day for the month, up 146 percent from the same period a year ago.

CME foreign exchange products in May averaged a record 501,000 contracts per day, up 69 percent compared with the year-ago period. In May, electronic foreign exchange products increased 90 percent to average a record 451,000 contracts per day compared with the same period last year. CME Euro FX futures reached a monthly average daily volume record of 204,000.

Trading in CME E-mini equity index products averaged a record 1.7 million contracts per day in May, up 40 percent compared with May 2005. The CME E- mini Russell 2000® futures reached a record 167,000 contracts per day in May, up 55 percent from the prior-year period. Total equity options volume grew 129 percent to a record 122,000 contracts per day during the month. CME E-mini options average daily volume more than tripled compared to the prior May, averaging a record 44,000 contracts per day. E-mini Russell 2000 options reached record volume in May. CME equity standard products volume grew 68 percent to average 159,000 contracts per day.

All statistics in this news release exclude data on CME's non-traditional TRAKRS® products, and CME Auction Markets™ products, unless otherwise noted. All references to options refer to options on futures contracts.

CME total interest rate volume averaged 3.0 million contracts per day in May, up 25 percent from the same period a year ago. This increase was driven by continued growth in CME Eurodollar options, up 50 percent to an average of 1.0 million contracts per day. Electronic volume of CME Eurodollar options averaged 66,000 contracts per day during the month, more than doubling from 31,000 during May 2005. This represented 7.0 percent of total CME Eurodollar options volume, the highest monthly percentage to date.

CME commodities and alternative investments volume averaged 84,000 contracts per day in May, up 39 percent over the same period a year ago.

Open interest for all CME products was a record 47 million contracts at the end of May, up from 30 million contracts at the end of December. Additionally, the Chicago Board of Trade had 15 million open positions with CME Clearing at month end. Open interest represents the number of contract positions that remain open at the end of a trading session.


                                   May 2006       May 2005  Percent Change
  Interest Rates                    2,970           2,385           25%
  E-Minis                           1,688           1,205           40%
  Equity Standard                     159              95           68%
  Foreign Exchange                    501             296           69%
  Commodities and Alt. Inv.            84              60           39%
    Sub Total                       5,402           4,041           34%
  TRAKRS                              159              22          617%
    Total                           5,562           4,063           37%

  Open Outcry                       1,390           1,054           32%
  CME Globex (Ex TRAKRS)            3,973           2,942           35%
  Privately Negotiated                 40              45          -13%

Note: CME Weather and GSCI products moved from Equity Standard to Commodities in April, and prior months were adjusted.


  Average Rate Per Contract (In Dollars)

  3-Month        By Product Line                            By Venue
                                        ities                         Priv-
                                         and                          ately
       Interest   E-   Equity  Foreign   Alt.         Open    CME     Nego-
         Rates  Minis Standard Exchange  Inv. Total  Outcry  Globex  tiated
   -06  0.478   0.717   1.445    1.253  0.948 0.641   0.471   0.667   3.672
   -06  0.493   0.712   1.431    1.253  0.953 0.652   0.477   0.679   3.583
   -06  0.506   0.703   1.452    1.251  0.972 0.669   0.496   0.688   3.659

  Average Daily Volume (In Thousands)

  3-Month        By Product Line                            By Venue
                                        ities                         Priv-
                                         and                          ately
       Interest   E-   Equity  Foreign   Alt.         Open    CME     Nego-
        Rates   Minis Standard Exchange  Inv.  Total Outcry  Globex  tiated
   -06  3,123   1,526   156      466      80   5,352  1,535   3,764     53
   -06  3,100   1,403   146      423      72   5,144  1,561   3,526     57
   -06  2,919   1,408   145      407      80   4,958  1,467   3,435     57
   -06  2,477   1,315   140      394      69   4,395  1,273   3,068     54

Chicago Mercantile Exchange Holdings Inc. (NYSE: CME)(NASDAQ: CME) 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. ( ), the world's largest and most diverse futures exchange. As an international marketplace, CME brings together buyers and sellers on its CME Globex electronic trading platform and on its trading floors. CME offers futures and options on futures primarily in interest rates, equities, foreign exchange and commodities. The exchange managed $47.0 billion in collateral deposits at March 31, 2006, including $3.8 billion in deposits for non-CME products.

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 Quarterly Report on Form 10-Q, which can be obtained at its Web site at . 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. Further information about CME and its products is available on the CME Web site at .



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

Web site:

Corporate Communications

+1 312 930 3434