NMX Nymex Holdings

NEW YORK, July 14 /PRNewswire-FirstCall/ -- NYMEX Holdings, Inc. (NYSE:NMX), the parent company of the New York Mercantile Exchange, Inc., today announced that July 18, 2008, will be the record date for stockholders entitled to vote upon the proposed acquisition by CME Group Inc. at a special meeting for that purpose. July 18 will also be the record date for owners of Class A memberships entitled to vote on the proposed transaction. The dates have not yet been set for either of the special meetings. About NYMEX Holdings, Inc. NYMEX Holdings, Inc. (NYSE:NMX) is the parent company of the New York Mercantile Exchange, Inc., the world's largest physical commodities exchange, offering futures and options trading in energy and metals contracts and clearing services for more than 400 off-exchange energy contracts. Through a hybrid model of open outcry floor trading and electronic trading on CME Globex(R) and NYMEX ClearPort(R), NYMEX offers crude oil, petroleum products, natural gas, coal, electricity, gold, silver, copper, aluminum, platinum group metals, emissions, and soft commodities contracts for trading and clearing virtually 24 hours each day. Further information about NYMEX Holdings, Inc. and the New York Mercantile Exchange, Inc. is available on the NYMEX website at http://www.nymex.com/. Forward Looking and Cautionary Statements This press release may contain forward-looking statements within the meaning of the Private Securities Litigation Reform Act, with respect to our future performance, operating results, strategy, and other future events. Such statements generally include words such as could, can, anticipate, believe, expect, seek, pursue, and similar words and terms, in connection with any discussion of future results. Forward-looking statements involve a number of assumptions, risks, and uncertainties, any of which may cause actual results to differ materially from the anticipated, estimated, or projected results referenced in forward-looking statements. In particular, the forward-looking statements of NYMEX Holdings, Inc., and its subsidiaries are subject to the following risks and uncertainties: the success and timing of new futures contracts and products; changes in political, economic, or industry conditions; the unfavorable resolution of material legal proceedings; the impact and timing of technological changes and the adequacy of intellectual property protection; the impact of legislative and regulatory actions, including without limitation, actions by the Commodity Futures Trading Commission; and terrorist activities and international hostilities, which may affect the general economy as well as oil and other commodity markets. We assume no obligation to update or supplement our forward-looking statements. Important Merger Information In connection with the proposed transaction involving CME Group and NYMEX Holdings, CME Group has filed a registration statement on Form S-4 with the Securities and Exchange Commission ("SEC") on June 10, 2008 containing a preliminary joint proxy statement/prospectus. The registration statement has not yet become effective. This material is not a substitute for the final prospectus/proxy statement or any other documents the parties will file with the SEC. Investors and security holders are urged to read the final prospectus/proxy statement and any other such documents, when available, which will contain important information about the proposed transaction. The final prospectus/proxy statement will be, and other documents filed or to be filed by CME Group with the SEC are or will be available free of charge at the SEC's Web site (http://www.sec.gov/) or from CME Group Inc., Attention: Shareholder Relations, 20 S. Wacker Drive, Chicago, Illinois 60606 , (312) 930-1000 or NYMEX Holdings, Inc., Attention: Investor Relations, at One North End Avenue, World Financial Center, New York, New York 10282, (212) 299-2000. CME Group and NYMEX Holdings and their respective directors, executive officers and other members of management and employees may be deemed to be participants in the solicitation of proxies from CME Group and NYMEX Holdings shareholders in respect of the proposed transaction. Information regarding CME Group and NYMEX Holdings' directors and executive officers is available in their respective proxy statements for their 2008 annual meeting of stockholders. Additional information regarding the interests of such potential participants is included in the joint proxy statement/prospectus and the other relevant documents filed with the SEC when they become available. This document shall not constitute an offer to sell or the solicitation of an offer to buy any securities, nor shall there be any sale of securities in any jurisdiction in which such offer, solicitation or sale would be unlawful prior to registration or qualification under the securities laws of any such jurisdiction. No offering of securities shall be made except by means of a prospectus meeting the requirements of Section 10 of the Securities Act of 1933, as amended. DATASOURCE: NYMEX Holdings, Inc. CONTACT: Media, Anu Ahluwalia, +1-212-299-2439, or Investors, Keil Decker, +1-212-299-2209, both of NYMEX Holdings, Inc. Web site: http://www.nymex.com/

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