
CME Group/Chicago HQ
Main Switchboard
Local: 312-930-1000
Toll Free: 866-716-7274
Customer Service
Product inquiries, website issues, and specific questions
Phone: 312-930-2316
Toll Free: 800-331-3332
E-mail: info@cmegroup.com
More CME Group Direct Lines
Click for phone list by department

| Date | ESF for S&P 500 Weekly and End-of-Month Options |
| 11/20/2009 | 1090.31 |
| 11/19/2009 | 1093.4 |
| 11/18/2009 | 1108.06 |
On expiration days for standard and E-mini S&P 500 Weekly and End-of-Month (EOM) options, CME calculates a special fixing price based on the weighted average trading price of E-mini S&P 500 futures in the last 30 seconds (2:59:30 – 3:00:00 p.m.) before the 3:00 p.m. (Chicago Time) options expiration. It will be disseminated immediately using the symbol ESF and is used to determine which options are in-the-money and, therefore, exercisable.
*CME disclaims liability for the ESF Options fixing price, and no representation or warranty, express or implied, is made concerning the ESF fixing price (including, without limitation, the Methodology for its determination and its suitability for any particular use).