Market  Data Advisory Notices
To Market Data Distributors/RLC Users
From Market Data Operations
Subject Market Data Depth of Book Change for Some CME Options Products -- Phase-In Effective Immediately
Notice Date 2006-11-13
Notice Number Q2006-208
Effective Date 2006-11-13

Effective immediately, CME® will begin phasing in a change to the depth of the Market Data book from 5-deep to 1-deep (top of book only) for the following options products:

Options Products                 Effective Date

CME FX Options                        November 12, 2006 (trade date November 13, 2006)

Equity Options                           November 19, 2006 (trade date November 20, 2006)

Commodity Options                    December 3, 2006 (upon launch)

This change is being made to conserve bandwidth.

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.