New Release Environment Harmonization - Effective Sunday, October 11, 2009

To provide a robust customer testing environment as close to production as possible, CME Group is harmonizing the New Release environment this Sunday, October 11. This synchronization will result in listed instruments in New Release better matching those listed in production; for instance, strike prices will match. The following impacts will occur:

• All GTC and GTD orders will be removed
• All User-Defined Spreads (UDS) will be eliminated
• The ISIN Codes for all currently listed products will be impacted
  • CME Group recommends all customers purge and re-load their instrument databases from the Security Definition (tag 35-MsgType=d) market data messages every week
  • There is no impact for customers who purge and re-load weekly, or who do not rely on the ISIN Code for instrument identification.
  • Please contact your front-end system provider for more information.

Please contact CSET at 312.930.2322 with any questions or concerns.

Please contact Market Data Operations (MDO) at mdo@cmegroup.com, if you have any questions concerning this notice.