Market Data Advisory Notices
To | Market Data Distributors
From | Market Data Operations
Subject | Attention ITC 2.1 Message Users Only: Change in Category Code "N" Messages for CME Pit-Traded Options - Effective Monday, December 17, 2007
Notice Date | 2007-11-14
Notice Number | Q2007-291
Effective Date | 2007-12-17
Effective Monday, December 17, 2007, forITC 2.1 users only, CME Group will change the conditions under which “LAST” messages (Category “N” messages – Bid/Ask LAST update messages) will be generated for CME pit-traded options . The new conditions under which “LAST” messages will be generated for CME pit-traded options are as follows: a). There is a new bid that is higher than the LAST; b). There is a new offer that is lower than the LAST; c). There is any trade. Currently, CME sends a “LAST” when: a). There is a New Bid that is higher than the LAST; b). There is a new offer that is lower than the LAST; c). There is a trade that is different from the LAST. Pit-traded options market data messages are currently transmitted via Channel 3 of the MDP.