Total options volume rose 16 percent to average 1.8 million contracts per day, and total electronic options volume increased 23 percent to average 275,000 contracts per day.

CME Group E-mini equity index volume averaged 2.5 million contracts per day, up 61 percent compared with April 2007. CME Group interest rate volume averaged 6.0 million contracts per day, up 24 percent from April 2007. CME Group foreign exchange (FX) volume averaged 613,000 contracts per day, up 41 percent from the same period in 2007.

CME Group commodities and alternative investments volume averaged 937,000 contracts per day, up 10 percent, and represented the second highest monthly volume to date. Monthly NYMEX energy and metals volume on the CME Globex electronic trading platform increased 43 percent to average 942,000 contracts per day.

All references to volume and rate per contract information in the text of this document assume combined legacy CME and legacy CBOT volumes and exclude our non-traditional TRAKRS products, for which CME Group receives significantly lower clearing fees than other CME Group products, and Swapstream products. -- www.cme.com