CME's May Trading Volume Is Second Highest On Record - At 45.1 Million GLOBEX® Electronic Trading Volume In May Increases 108 Percent

Trading volume on Chicago Mercantile Exchange Inc. (CME) in May reached the second highest level for a single month in exchange history, as 45.1 million contracts changed hands, an increase of 35 percent from May 2001. Year-to-date volume reached 209.3 million contracts, representing an increase of 33 percent over 2001. The underlying value of the contracts traded totaled $31 trillion.

Volume on GLOBEX®, CME's electronic trading platform, rose 108 percent to 13,727,607 contracts, while year-to-date electronically traded volume increased by 94 percent to 56,938,817 contracts.

Trading in futures contracts on CME set a second consecutive all-time monthly record at 35.5 million contracts. The month was also the best May on record for trading of options on futures contracts, with 9.5 million contracts changing hands.

Trading in stock index products rose to an all-time record of 14.8 million contracts, including a record 7.6 million E-mini™ S&P 500 futures, 4.6 million E-mini Nasdaq-100 futures and 40,507 E-mini Russell 2000 futures.

Interest rate product volume set a new May record of 27.7 million contracts, an increase of 23 percent from May 2001. Eurodollar futures, the world's most actively traded futures contract, traded a May record of 18.7 million contracts, up 19 percent from year-ago levels. Volume in Eurodollar options on futures set a May record of 8.9 million contracts, an increase of 75 percent.

Volume in foreign exchange products rose 20 percent in May over the same month last year, to 1.9 million contracts. An all-time monthly record of 101,522 Euro FX options changed hands. New May records were set in Euro FX futures at 611,387 contracts and Australian dollar futures at 77,449 contracts.

Open interest on CME at month's end stood at 18.1 million positions, 38 percent higher than year-ago levels.

Chicago Mercantile Exchange Inc. (www.cme.com) is the largest futures exchange in the United States. As an international marketplace, CME brings together buyers and sellers on its trading floors and GLOBEX around-the-clock electronic trading platform. CME offers futures contracts and options on futures primarily in four product areas: interest rates, stock indexes, foreign exchange and commodities. The exchange moves about $1.5 billion per day in settlement payments and manages $28.2 billion in collateral deposits. CME is a wholly owned subsidiary of Chicago Mercantile Exchange Holdings Inc.

Complete monthly volume statistics are available on the CME Web site at www.cmne.com.