Additional Contract Listing for Corn-calendar & Basis Swaps, Wheat Calendar Swaps, and Soybean Calendar Swaps - Effective Monday, April 20, 2009

Effective Monday, April 20, 2009, Corn, Wheat, and Soybean Calendar Swaps and Corn Basis swaps trading on CME ClearPort will have a new listing convention. Current listing convention is 12 consecutive months.

New listing convention is as follows:

·          16 consecutive months in Corn Calendar and Basis Swaps

·          14 consecutive months in Wheat Calendar Swaps

·          15 consecutive months in Soybean Calendar Swaps  

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