| Notice to Members |
| Notice No. 503 11/20/2007 |
| Expansion of Listing Months for Natural Gas Calendar Spread Option |
|---|
| Please be advised that the Exchange will expand its listing of its Natural Gas Calendar Spread Option Contracts. Beginning with Wednesday, November 21, 2007, there will be a two month Calendar Spread Option on the spread between January 2009 and March 2009 Natural Gas futures. |
| Should you have any questions or require any further information, please contact exchangeinfo@nymex.com |