News Release

CME Reports Average Daily Volume of 4.5 Million Contracts in October 2005, Up 40 Percent from Year-Ago Period

Tue Nov 01 2005

CHICAGO, Nov. 1 /PRNewswire-FirstCall/ -- CME, the world's largest and most diverse financial exchange, today said average daily volume in October was 4.5 million contracts, up nearly 40 percent from the same period a year ago. Total monthly volume was more than 94 million contracts. Average daily volume on the CME Globex electronic trading platform averaged 3.3 million contracts, a 52 percent increase from October 2004. Electronic trading represented 74 percent of total CME volume in October, compared with 68 percent in the prior-year period. Electronic options represented 10 percent of total options in October, compared with 6 percent in the third quarter and 5 percent in the second quarter.

CME total interest rate volume was 2.4 million contracts per day in October, up 35 percent from the same period a year ago. This increase was driven by growth in trading of electronic CME Eurodollar futures, which represented 81 percent of total CME Eurodollar futures volume in October, compared with 72 percent in October 2004. Electronic CME Eurodollar futures averaged 1.4 million contracts per day in October, up 57 percent from the same period a year ago.

Trading in CME E-mini™ equity index products averaged a record 1.6 million contracts per day in October, an increase of 44 percent compared with the same period last year. CME achieved average daily volume records of 1.1 million E-mini S&P 500 contracts, 155,000 E-mini Russell 2000 contracts and 27,000 S&P MidCap 400 contracts. The company also posted an average daily volume record of 45,000 E-mini S&P electronic options contracts, compared with the prior record of 21,000 contracts per day in September.

Average daily volume of CME foreign exchange products was 328,000 contracts, a 52 percent increase compared with October 2004. October 2005 was a record non-roll month for these products. During the month, electronic foreign exchange products increased 73 percent from the same period a year ago to 277,000 contracts per day.

Open interest for all CME products at the end of October was 33 million contracts, with an additional 7 million Total Return Asset Contracts™ (TRAKRS). Additionally, the Chicago Board of Trade (CBOT) had approximately 13 million open positions at the CME Clearing House at the end of October. Open interest represents the number of contract positions that are not closed out at the end of a trading session.

All statistics in this news release exclude data on CME's non-traditional TRAKRS™ products unless otherwise noted.

  CME MONTHLY AVERAGE DAILY VOLUME (In Thousands)

                                October 2005   October 2004   Percent Change
  CME PRODUCT LINE
  Interest Rates                    2,351           1,738           35%
  E-Minis                           1,634           1,134           44%
  Equity Standard                     129              93           38%
  Foreign Exchange                    328             215           52%
  Commodities                          45              37           23%
    Sub Total                       4,488           3,217           40%
  TRAKRS                               21              39          -46%
    Total                           4,509           3,256           38%

  VENUE
  Open Outcry                       1,114             983           13%
  CME Globex (Ex TRAKRS)            3,328           2,192           52%
  Privately Negotiated                 46              41           12%


  CME RATE PER CONTRACT THROUGH SEPTEMBER 2005 (excluding trakrs)

  Average Rate Per Contract (In Dollars)
  Rolling Three-Month Average

                      By Product Line                         By Venue
                                                                        Pri-
  3-Month                                                             vately
  Period Interest         Equity  Foreign  Commod-       Open    CME   Nego-
  Ending  Rates E-Minis Standard Exchange  ities  Total Outcry Globex tiated
  Sep-05  0.502   0.705   1.400    1.353   0.904  0.659  0.463  0.696  3.674
  Aug-05  0.506   0.692   1.346    1.361   0.886  0.664  0.470  0.696  3.604
  Jul-05  0.502   0.684   1.324    1.348   0.855  0.655  0.472  0.679  3.561


  Average Daily Volume (In Thousands)
  Rolling 3 Month Average

                 By Product Line                             By Venue
                                                                        Pri-
  3-Month                                                             vately
  Period Interest         Equity  Foreign  Commod-       Open    CME   Nego-
  Ending  Rates E-Minis Standard Exchange  ities  Total Outcry Globex tiated
  Sep-05  2,489   1,181   124      336       50   4,180  1,263  2,897   47
  Aug-05  2,235   1,151   118      329       46   3,879  1,122  2,712   45
  Jul-05  2,311   1,179   119      334       50   3,994  1,107  2,839   47

Chicago Mercantile Exchange Inc. ( http://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 $1.4 billion per day in settlement payments in the first three quarters of 2005 and managed $43.8 billion in collateral deposits at September 30, 2005, including $3.8 billion in deposits for non-CME products. CME is a wholly owned subsidiary of Chicago Mercantile Exchange Holdings Inc. (NYSE: CME)(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 quarterly report on Form 10-Q, which can be obtained at its Web site at http://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. Further information about CME and its products is available on the CME Web site at http://www.cme.com/ .

CME-G

SOURCE: Chicago Mercantile Exchange Inc.

CONTACT: Media. Anita Liskey, +1-312-466-4613, or Bill Parke,
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