CME Equity Options Spreads Change – Effective Sunday, October 15, 2006

Market Data Advisory Notices

To	Market Data Distributors
From	Market Data Operations
Subject	CME Equity Options Spreads Change – Effective Sunday, October 15, 2006
Notice Date	2006-09-25
Notice Number	Q2006-166
Effective Date	2006-10-15
Effective Sunday, October 15, 2006 (trade date Monday, October 16, 2006), the Instrument Group Codes for CME Equity options spreads will be consolidated to simplify listing groups in the CME Equity product complex. Unique Instrument Group Codes will be assigned, by product, for all exchange-defined CME Equity options spreads. The Instrument Group Code is found in positions 70-71 in the Instrument Creation (MO) market data message. Please view the attached memo for more information.