CME® Spread Type Changes – Effective Sunday, May 21, 2006

Market Data Advisory Notices

To	Market Data Distributors
From	Market Data Operations
Subject	CME® Spread Type Changes – Effective Sunday, May 21, 2006
Notice Date	2006-05-02
Notice Number	Q2006-64
Effective Date	2006-05-21
In an effort to simplify and streamline customer processing of CME-listed spreads, effective Sunday, May 21, 2006 (for trade date Monday, May 22^nd), CME will implement new Spread Types on both the RLC messages and ITC 2.1 messages. The attached notice provides detailed information regarding changes to both message specifications.