On Monday, April 23, 2007, changes in Trading Unit size, Price Increments and Minimum Fluctuations on CME^® Frost Days Monthly and Seasonal Futures and Options contracts will take effect.  The changes follow:

• Trading Unit Size:  The size of the unit of trading will be 1,000 Euros (€) times the respective CME Seasonal Frost Days Index (current size is 10,000€).
• Price Increments:  The minimum price fluctuation is 1 index point, with a value of 1,000 Euros (€).
• Minimum Fluctuation:  The minimum fluctuation will be 1 index point, with a value of 1,000 Euros (€).