Effective Sunday, June 19, 2005, to support the rollout of additional options contracts on the CME Globex electronic trading platform, the ISIN codes for all outright CME Eurodollar options instruments will change in the CME production environment. 

The ISIN code is the 12 character alphanumeric identifier for each instrument listed on the CME Globex platform, and can be found in positions 1 through 12 of all contract –specific CME Market Data API messages.  CME recommends that customers clear the ISIN codes from existing product tables and reacquire them from the CME MD API MO (m-oh) message on a weekly basis.

If you have any questions regarding this notice, please contact:

Marilee Radecki                      312.930.8193              mradecki@cme.com

Kevin Brady                             312.648.3653              kbrady@cme.com

Thank you.