As you are aware, pending regulatory approval, OneChicago has announced that trading of Single Stock Futures is scheduled to begin on October 25,2002. In preparation for the launch, CME is requiring that all member firms that will either post-trade process (PTP) and/or clear at the CME, participate in no less than one Saturday end-to-end test.  In addition, we strongly encourage you to review the output from the Tuesday and Thursday test cycles, as noted in the ONE test schedule.

You should begin participating in testing by October 1^st, but no later than October 8^th.  This will ensure that you go through at least 2 complete cycles including numerous trade scenarios and corporate events.  Please take the time to review the test plan provided by ONE.

PTP

On each mid-week test date, you will be able to log onto FEC-QA and GUS-QA and view the trades injected for that day�s test.  We encourage you to enter changes to non-match critical fields and mark other ONE trades as give-ups. Make sure you then go to GUS-QA to allocate and accept.  Firms should �buddy-up� with another CME clearing firm and give-up to each other.

TREX messages will be automatically released to member firms� test �05" queues each afternoon between 2-3:00, CDT. You may also request that your test TREX messages be mailed to you.  To make this arrangement, please send the recipient�s e-mail address to sjurek@cme.com.  You must notify us at least 24hr prior to the test day.

Clearing Output

Data files will be posted to firms� FTP sub-directories with the same dataset names as production but with the extension .ONETEST Print reports will be available via Infopac or Document Direct.  Both the data files and reports will be available the morning following the test day.

Testing Set-up Requirements

Please download and review the ONE Testing Documentation for complete details at www.ONEChicago.com

If you have any questions, Please contact Karen McCoy

(312) 930-4524 or Stacey Jurek (312) 338-2088.