Notice No. 08-632 December 9, 2008 REMINDER- Natural Gas Options and Natural Gas Penultimate Swap Expiration Date Please be reminded that the expiration date for the January 2009 Natural Gas Option and the January 2009 Natural Gas Penultimate Swap is Wednesday, December 24, 2008. Please refer to the Notice to Members 07-50 that explains the Exchange’s expiration policy under the new holiday calendar. Should you have any questions or require any further information, please contact ExchangeInformation@cmegroup.com