News Release

Exchange Announces Procedures for the Transition of the e-miNY Futures Contracts to NYMEX ClearPortsm

Wed May 18 2005
New York, N.Y., May 18, 2005 — New York Mercantile Exchange, Inc., will transition its e-miNYsm crude oil and natural gas futures contracts to NYMEX ClearPortsm from the Chicago Mercantile Exchange GLOBEX® system on June 20. After the transition, the contracts will be referred to as the NYMEX miNYsm contracts. The transition and listing of the July and August contracts is explained below.

The August NYMEX miNYsm crude oil and natural gas futures contracts will not be listed for trading on GLOBEX®. The July e-miNYsm crude oil contract will expire on GLOBEX® at 2:30 PM Eastern standard time (EST) on June 20. The August contract will be listed for trading on NYMEX ClearPortsm at 3:15 PM EST on June 20.

The July e-miNYsm natural gas contract will be listed on GLOBEX® until 2:30 PM EST on June 20. The July contract will be listed on NYMEX ClearPortsm and resume trading at 3:15 PM EST on June 20, the same time that the August contract is listed for trading.

Exchange President James E. Newsome said, "We are pleased to consolidate the NYMEX miNYsm contracts on to the NYMEX ClearPortsm clearing and trading platform, offering our customers the ability to manage their market risk from a single electronic venue."

# # #

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.

Corporate Communications

+1 312 930 3434