As you were notified previously in CME Special Executive Reports, S-5620, dated Friday, February 11, 2011, and S-5617, dated Wednesday, February 9, 2011, effective on Sunday, February 27, 2011, for the trade date of Monday, February 28, 2011, CME is adding Russian Ruble futures and options serial contract months for trading on CME Globex® and the open outcry trading floor. The serial contract months will supplement the current March quarterly cycle futures and March quarterly cycle options on futures and their associated weekly expirations. CME had more limited serial month Russian ruble futures and options listings immediately before the Russian Financial Crisis in August / September / October 1998. No rule amendments are necessary for these new serial contract month listings. CME is simply listing new serial months for trading.