This change applies only to distributors receiving market data via channel four of the MDN.

Effective with the GLOBEX® session on Sunday, January 11, 2004, CME will implement a change to GLOBEX market data for options on equity index futures.  CME currently provides both “Best Five (5) Bids/Offers (the “MA” message)” and “Full Depth of Book (the “MC” and “MF” messages)” for all options products.  This is inconsistent with the underlying equity index futures contracts, where only “Best Five (5) Bids/Offers” information is distributed.  Going forward, CME will provide only “Best Five (5) Bids/Offers” for each option on an equity index future as well.

This change should have no impact on most distributor systems.  However, distributors are encouraged to verify that their systems do not rely on receipt of the full depth of book messages for such options.

If you have any questions regarding this notice, please contact Marilee Radecki at 312.930.8193 or email mradecki@cme.com or Lisa Amato at 312.338.2654 or email lamato@cme.com.

Thank you.