Effective Thursday, February 1, 2007, the opening time of Regular Trading Hours (RTH) for the Goldman Sachs Commodity Index (GSCI) futures and options will change.  The revised trading hours will be from 7:55 a.m. until 1:40 p.m. Central Time (CT). Currently, trading hours are 8:45 a.m. until 1:40 p.m. (CT change).

This change is the result of a new opening time for NYMEX’s floor-traded energy markets, which will open an hour earlier (to 8:00 a.m. from 9:00 a.m. CT), also scheduled to occur on February 1^st.

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.