CME Group Inc. (CME) reported that Tuesday's market swoops drove record trading activity in its electronic futures on the Standard & Poor's 500 stock index.

More than 25.7 million e-mini S&P futures changed hands Tuesday as the contract price at one point hit its lowest level in a year before investors rallied behind the Federal Reserve's commitment to keep rates near zero until mid-2013.

"All that energy in the markets took us to extremes," said Frank Lesh, a broker with Futurepath Trading in Chicago. "And a lot of speculators wanted in on the action."

-By Jacob Bunge, Dow Jones Newswires; 312 750 4117; jacob.bunge@dowjones.com

--Howard Packowitz contributed to this article.

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