Effective Sunday, December 10, 2006 (trade date Monday, December 11, 2006), the contract size will be reduced on CME Frost Days Products (CME Frost Days Futures and Options on Futures, CME Seasonal Frost Days Futures and Options on Futures) from 10,000 Euros (€) to 1,000 Euros (€).  Consequently, minimum fluctuation and price increment will be reduced from 10,000 Euros (€) to 1,000 Euros (€).  The ticker symbols of the affected products are listed below.

Contract Name                                                                                            Ticker Code

CME Frost Days Futures                                                                                        FZ

CME Frost Days Options on Futures                                                                     FZ

CME Seasonal Frost Days Futures                                                                        FZX

CME Seasonal Frost Days Options on Futures                                                     FZX

This change is being made at the request of customers who desire a smaller contract size.

If you have any questions regarding this notice, please contact:

Marilee Radecki                                312.930.8193                        mradecki@cme.com

Kevin Brady                                       312.648.3653                        kbrady@cme.com

Thank you.