For your information, MDP connectivity testing will be offered to all existing Market Data API customers during themorning hours (6:00 a.m. – 12:00 noon CT) of Saturday, August 19 and Saturday, August 26, 2006, to assist them in their migration to the MDP.  During the test, CME will replay MDP production messages.

We ask that all Market Data Distributors be aware of this testing and take measures to ensure that the replayed data is not captured for later dissemination or intermingled with production data.

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.