Please be informed that in response to clearing firms’ requests, CME Clearing has postponed the deadline for firms to convert give-up API messages and electronic trade confirms from TREX to FIXML format to Friday, November 30, 2007.    Also, the exchange will discontinue support and use of electronic TREX confirms and give-up API messaging effective Monday, February 4, 2008.

Meeting the November 30, 2007 deadline is essential in order to successfully participate in Globex Mock integration testing for CBOT products which begins December 1, 2007.   While TREX formatted electronic trade confirms will be supported during the Globex integration tests, firms that go into these tests utilizing TREX will find they have to participate in a second round of testing in FIXML format in January.

Additionally, the deadline for converting to FIXML format for all pit, transfer, FLEX, and differential spread trades is March 31, 2008.   Firms can begin testing these trade types in FIXML format in our certification environment beginning on Monday, November 5, 2007.

As is standard protocol for all such message or application conversions, firms are required to test and certify their success in the certification environment.   Testing is available in each of our certification environments on a daily basis from 8:00 am to 5:00 pm, except Tuesdays when they are not available from 12:00 pm to 5:00 pm.

For questions, please contact CME Clearing Services at 312.207.2525 or e-mail at ccs@cmegroup.com

Thank you.

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