CME Prices Underwritten Public Offering

CME Group Inc. prices an underwritten public offering of $750 million aggregate principal amount of 5.75% notes due 2014. The offering is being made under CME Group's existing shelf registration statement and is expected to close on 9 February 2009,

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CME Group Inc. prices an underwritten public offering of $750 million aggregate principal amount of 5.75% notes due 2014. The offering is being made under CME Group’s existing shelf registration statement and is expected to close on 9 February 2009, subject to customary closing conditions.

CME Group intends to use the net proceeds from the offering to repay any outstanding commercial paper borrowings that are backstopped by the company’s 364-day revolving bridge facility. The company will use the remaining net proceeds from the offering for general corporate purposes. The company expects to terminate the bridge facility following the offering.

L.D.

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