CME S&P 500/Citigroup Growth Options Instrument Group Code Change – RLC Users Only

Market Data Advisory Notices

To	Market Data Distributors
From	CME Market Data Operations
Subject	CME S&P 500/Citigroup Growth Options Instrument Group Code Change – RLC Users Only – Effective May 13, 2007
Notice Date	2007-04-30
Notice Number	Q2007-114
Effective Date	2007-05-13
Effective Sunday, May 13, 2007, the Instrument Group Code for all CME S&P 500®/Citigroup Growth options on futures will change to SN from SO. The Instrument Group Code is located in position 70-71 of the Instrument Creation (MO) market data message. Additional information on MO messages is available in the RLC Message Specifications document for CME’s Market Data Platform.