Glass Lewis and Proxy Governance Recommend NYMEX Shareholders Vote 'FOR' the Acquisition...

Glass Lewis and Proxy Governance Recommend NYMEX Shareholders Vote 'FOR' the
Acquisition by CME Group

NEW YORK, July 31 /PRNewswire-FirstCall/ -- NYMEX Holdings (NYSE: NMX),
parent company of the New York Mercantile Exchange, Inc., today announced that
Glass Lewis & Co. and Proxy Governance, two leading proxy advisory firms, have
recommended that NYMEX shareholders vote "FOR" the acquisition by CME Group at
the Special Shareholders Meeting scheduled for August 18.
In making its recommendation, Glass Lewis stated, "Consolidation among
exchange operators continues to be a viable growth strategy. The transaction
will result in a more competitive exchange, offers NYMEX Holdings shareholders
a financially fair consideration and is expected to be accretive to earnings
for the surviving shareholders of CME Group."
The Glass Lewis report concluded: "... we recommend that shareholders of
each company vote FOR this proposal."
The Board of Directors of NYMEX Holdings recommends that shareholders vote
"FOR" the adoption of the agreement and plan of merger.
About NYMEX Holdings, Inc.
NYMEX Holdings, Inc. (NYSE: NMX) is the parent company of New York
Mercantile Exchange, Inc., the world's largest physical commodities exchange,
offering futures and options trading in energy, metals and other contracts and
clearing services for more than 400 off-exchange contracts. Through a hybrid
model of open outcry floor trading and electronic trading on the CME Globex(R)
electronic platform, as well as clearing off-exchange instruments through
NYMEX ClearPort(R) Clearing, 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 Statements
This press release may contain forward-looking information regarding CME
Group Inc. ("CME Group") and NYMEX Holdings, Inc. ("NYMEX Holdings") and the
combined company after the completion of the merger that are intended to be
covered by the safe harbor for "forward-looking statements" provided by the
Private Securities Litigation Reform Act of 1995. These statements include,
but are not limited to, the benefits of the business combination transaction
involving CME Group and NYMEX Holdings, including future financial and
operating results, the new company's plans, objectives, expectations and
intentions and other statements that are not historical facts. Such statements
are based on current beliefs, expectations, forecasts and assumptions of CME
Group's and NYMEX Holdings' management which are subject to risks and
uncertainties which could cause actual outcomes and result to differ
materially from these statements. Other risks and uncertainties relating to
the proposed transaction include, but are not limited to the satisfaction of
conditions to closing; including receipt of shareholder, antitrust, regulatory
and other approvals on the proposed terms and schedule; the proposed
transaction may not be consummated on the proposed terms and schedule;
uncertainty of the expected financial performance of CME Group following
completion of the proposed transaction; CME Group may not be able to achieve
the expected cost savings, synergies and other strategic benefits as a result
of the proposed transaction or may take longer to achieve the cost savings,
synergies and benefits than expected; the integration of NYMEX Holdings with
CME Group's operations may not be successful or may be materially delayed or
may be more costly or difficult than expected; general industry and market
conditions; general domestic and international economic conditions; and
governmental laws and regulations affecting domestic and foreign operations.
For more information regarding other related risks, see Item 1A of CME
Group's Annual Report on Form 10-K for the fiscal year ended December 31, 2007
and Item 1A of NYMEX's Annual Report on Form 10-K for the fiscal year ended
December 31, 2007 and additional updates to these risks contained in our
Quarterly reports. Copies of said 10-Ks and 10-Qs are available online at
http://www.sec.gov/ or on request from the applicable company. You should not
place undue reliance on forward-looking statements, which speak only as of the
date of this press release. Except for any obligation to disclose material
information under the Federal securities laws, CME Group and NYMEX Holdings
undertake no obligation to release publicly any revisions to any forward-
looking statements to reflect events or circumstances after the date of this
press release.
Important Merger Information
In connection with the merger 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 11, 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.
SOURCE NYMEX Holdings, Inc.

Media, Anu Ahluwalia, +1-212-299-2439, or IR contact, Keil Decker,
+1-212-299-2209, both of NYMEX Holdings, Inc.