The New York Mercantile Exchange, Inc. today announced margin changes for its natural gas index swap futures contracts, beginning at the close of business tomorrow.

The New York Mercantile Exchange, Inc. today announced margin changes for some of its natural gas basis swap futures contracts, beginning at the close of business tomorrow.

The New York Mercantile Exchange, Inc. announced margin changes for some of its electricity futures contracts on NYMEX ClearPort.

CME Group (NASDAQ: CME) sent the following letter to the Class A Members of the New York Mercantile Exchange, Inc.:

CME Group Inc. (NASDAQ: CME) and NYMEX Holdings, Inc. (NYSE: NMX) today announced that the closing date of their merger is anticipated to be August 22, 2008. In the merger, NYMEX Holdings will merge with and into CMEG NY Inc., a wholly-owned subsidiary of CME Group.

CME Group (NASDAQ: CME) today sent the following letter to the Class A Members of the New York Mercantile Exchange, Inc.:

CME Group Inc. (NASDAQ: CME) and NYMEX Holdings, Inc. (NYSE: NMX) today announced that the closing date of their merger is anticipated to be August 22, 2008, assuming stockholder and member approval on Monday, August 18, 2008. In the merger, NYMEX Holdings will merge with and into CMEG NY Inc., a wholly-owned subsidiary of CME Group.

CME Group, the world's largest and most diverse derivatives exchange, today declared a third-quarter dividend of $1.15 per share, payable September 25, 2008, to shareholders of record September 10, 2008.

CME Group, Inc. (NASDAQ: CME) announced it priced an underwritten public offering of $250 million aggregate principal amount of floating rate notes due 2009, $300 million aggregate principal amount of floating rate notes due 2010 and $750 million aggregate principal amount of 5.40% notes due 2013. The floating rate notes due 2009 will bear interest equal to LIBOR plus 0.20% per year, adjusted quarterly.

CME Group, the world's largest and most diverse derivatives exchange, announced that Glass Lewis & Co. and Proxy Governance, two leading proxy advisory firms, have recommended that CME Group shareholders vote "FOR" the acquisition of NYMEX Holdings at the Special Shareholders Meeting scheduled for August 18, 2008.

CME Group, the world's largest and most diverse derivatives exchange, today announced that July 2008 volume averaged 11.2 million contracts per day, with total volume for the month exceeding 245 million contracts. Compared with July 2007, volume was down 1 percent.

CME Group, the world's largest and most diverse derivatives exchange, announced today that the Dubai Financial Services Authority (DFSA) has granted CME Group the status of a Recognized Body within the Dubai International Financial Centre (DIFC) for all CBOT products. The DFSA is the independent, integrated regulatory authority responsible for the regulation of all financial and ancillary services conducted in or from the DIFC.