CME Globex Performance Enhancements for Interest Rates - Postponed

The implementation for CME Globex performance enhancements for Interest Rates May 16, 2010, have been postponed until further notice. Additional information will be available in forthcoming Market Data Operations notices.

Effective this Sunday, May 16, 2010 CME Group is implementing an upgrade to Interest Rate futures markets on the CME Globex electronic trading platform that will result in significantly reduced message response times. Already among the fastest in the industry, in internal testing environments this upgrade has reduced iLink and FIX/FAST response times by an average of 15% for Interest Rate futures and future spreads.

Please note: as a result of the reduced message response times, bandwidth utilization in these futures markets is expected to ultimately increase by as much as 20%.

There will be no changes to functionality or messaging format with these performance improvements. Good 'Till Cancelled and Good 'Till Date (GTC/GTD) orders will not be impacted.

This upgrade is designed to enhance our liquid, efficient and competitive marketplace for participants worldwide.