In response to customer requests for equitable fee administration and increased efficiency, effective January 1, 2007 CME will implement enhancements to its Interest Rate clearing fee tier structure for futures and options. These enhancements will simplify and automate the billing process so that it is more transparent to exchange Clearing members and end users.

To view the full detail of these changes, please visit our Web site at www.cme.com/irfees.

If you have any questions about these changes, or any other fee issues, please contact the EFS team by email atefsadmin@cme.comor by phone at 312.648.5470.