Dear CME Globex Customers,

You are cordially invited to the CME FirmSoft Focus Group meeting. The CME FirmSoft Focus Group meetings are designed to communicate CME FirmSoft enhancements and solicit user input on current and future development.

Topics to be discussed include:

• CME FirmSoft Distribution
• Recent and Upcoming Enhancements
• CME FirmSoft POST
• CME FirmSoft Clearing Firm Self-Administration

The CME FirmSoft Focus Group meeting will take place today, Wednesday, April 26, 2006, at 4:00 p.m. Central time (CT) at:

CME
Committee Room X, 8 South
20 South Wacker Drive
Chicago, IL 60606

Please register to attend.

After the meeting, we hope you will join us for a cocktail reception in the CME Club.

If you are unable to attend the CME FirmSoft Focus Group meeting in person, a webinar will be held on tomorrow, Thursday, April 27, 10:30 a.m. CT. Register online to attend.

We look forward to seeing you there!

CME Globex Account Management
312.634.8700