This notice details two upcoming changes to NYMEX options products.

Expanded Listings Effective October 26, 2008

As a reminder, beginning Sunday evening, October 26, 2008 (for trade date Monday, October 27, 2008), CME Group will expand the listing of NYMEX American Style Natural Gas Options (ON), as well as, NYMEX European Style Natural Gas Look Alike Options (LN) with consecutive monthly contract months through December 2016.  With the expiration of the December 2008 option, an entire new calendar year (2017) will be added. The expanded option listings will be available on both the NYMEX Division trading floor for Open-Outcry trading, and also for clearing on ClearPort® Clearing.  The expanded contract months will not be listed on CME Globex®.

Expanded Listings Effective December 7, 2008

Also, tentatively scheduled to occur Sunday evening, December 7, 2008 (for trade date Monday, December 8, 2008), CME Group plans to further extend the contract listing of NYMEX American Style Natural Gas Options (ON) and NYMEX European Style Natural Gas Look Alike Options (LN) with consecutive monthly contract months through December 2021.  Again, the expanded option listings will be on both the NYMEX Division trading floor for open-outcry trading, as well as for clearing on ClearPort® Clearing.  The expanded contract months will not be listed on CME Globex.

Should you have any questions regarding these changes, please contact Ungyoung Kim at 212-299-2603. C ontact Market Data Operations (MDO) at mdo@cmegroup.com , if you have any questions concerning this notice.