CME Group announces effective on Sunday, February 27, 2011, for the trade date of Monday, February 28, 2011, the addition of 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.