Variable Tick Threshold Levels To Change

Market Data Advisory Notices

To	Market Data Distributors
From	Market Data Operations
Subject	Variable Tick Threshold Levels To Change
Notice Date	2006-03-17
Notice Number	Q2006-36
Effective Date
Effective Sunday, April 2, 2006 for Trade Date Monday, April 3, 2006, the variable tick threshold levels will be raised from 3.00 Index points to 5.00 Index points for the S&P 500^®, S&P/Citigroup Growth^TM and S&P/Citigroup Value^TM options, and for the E-mini® S&P 500 options and option strategies (ES). This change affects the Trading Floor and CME Globex options pricing. Please view the attached memo for more information.