Effective Sunday, January 21, 2007, the following market data messages will be removed from the CME Market Data Platform administration channel (channel 2) in the production environment.  These messages will then be disseminated via their respective CME Market Data Platform product data channels:

• Instrument Creation (MO) messages
• Trading Day Timetables (MH) messages
• Group State Change Market (MJ) messages
• Start of CME Globex^® Platform (MK) messages
• Start of Instrument Referential Broadcasting (ML) messages
• End of Instrument Referential Broadcasting (MM) messages

A similar change has already taken effect in the certification environment.  Additionally, for CME Equity, FX and Commodity options, this change has been applied to both the certification and production environments.

The Instrument Creation (MO) messages – Replay Only channels 1 and 16 are not affected by this change.  We strongly recommend customers use the MO messages on channels 1 and 16 to download weekly Instrument Creation (MO) messages, and use the individual product channels to receive mid-week instrument additions.

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.