Attention RLC Message Users: CME Globex Group Code Change for E-Mini S&P SmallCap 600

Market Data Advisory Notices

To	Market Data Distributors
From	Market Data Operations
Subject	Attention RLC Message Users: CME Globex Group Code Change for E-Mini S&P SmallCap 600 - Effective Sunday, August 26, 2007
Notice Date	2007-08-08
Notice Number	Q2007-200
Effective Date	2007-08-26
*Effective Sunday, August 26, 2007* (trade date Monday, August 27), the Instrument Group Code for the E-mini S&P SmallCap 600 futures will change to ER, from the current Instrument Group Code of EP. This change affects all customer environments: Production, Certification and New Release. The Instrument Group Code can be found in the Instrument Creation (MO) RLC market data message, in positions 70-71.