REMINDER: Amendments to Exercise Price Rules for Certain Options on CME Standard and Poor's 500 Stock Price Index Futures and Options on E-mini Standard and Poor's 500 Stock Price Index Futures Contracts

Effective Sunday, September 30, 2018, for trade date Monday, October 1, 2018, and pending all relevant CFTC regulatory review periods, Chicago Mercantile Exchange Inc. (“CME” or “Exchange”) will amend the exercise price rules of certain Options on E-mini Standard and Poor’s 500 Stock Price Index Futures (“ES options”) and Options on Standard and Poor’s 500 Stock Price Index Futures (“SP options”) (collectively, “option contracts”).

Please refer questions regarding to:

John Wiesner       john.wiesner@cmegroup.com    312.930.3066

Tom Boggs           thomas.boggs@cmegroup.com 312.930.3038

Frederick Sturm    frederick.sturm@cmegroup.com 312.930.1282

Please click here for PDF of SER-8215R.