News Release

NYMEX to Change Margins for Petroleum Products Futures Contracts

Tue Jun 06 2006

NEW YORK, N.Y., June 6, 2006 — The New York Mercantile Exchange, Inc. announced that it will change margins for several of its NYMEX ClearPort® petroleum products and spread futures contracts, at the close of business on tomorrow.

Margins for the unleaded 87 up-down spread calendar swap futures contract will decrease to $2,000 from $3,000 for clearing members; to $2,200 from $3,300 for members; and to $2,700 from $4,050 for customers.

Margins for the European ULSD 50 PPM CIF Northwest Europe swap futures contract will increase to $36,000 from $21,000 for clearing members; to $39,600 from $23,100 for members; and to $48,600 from $28,350 for customers.

Margins for the Brent—Dubai swap futures contract will increase to $600 from $300 for clearing members; to $660 from $330 for members; and to $810 from $405 for customers.

Margins for the first month of the New York Harbor gasoline crack spread calendar swap futures contract will increase to $3,325 from $2,500 for clearing members, to $3,658 from $2,750 for members, and to $4,489 from $3,375 for customers. Margins for the second to fifth months will be $3,150 for clearing members, $3,465 for members, and $4,253 for customers. Margins for all other months will be $2,450 for clearing members, $2,695 for members, and $3,308 for customers.

Margins for the first month of the RBOB crack spread swap futures contract will increase to $4,000 from $2,500 for clearing members; to $4,400 from $2,750 for members; and to $5,400 from $3,375 for customers. Margins for the second to fifth months will be $3,500 for clearing members, $3,850 for members, and $4,725 for customers. Margins for all other months will be $2,500 for clearing members, $2,750 for members, and $3,375 for customers.

Margins for the first month of the European gasoil calendar swap futures contract will increase to $37,000 from $33,800 for clearing members, to $40,700 from $37,180 for members, and to $49,950 from $45,630 for customers. Margins for the second to fifth months will increase to $35,000 from $32,000 for clearing members, to $38,500 from $35,200 for members, and to $47,250 from $43,200 for customers. Margins for all other months remain unchanged.

Intra—commodity spread margins for the first month of the New York Harbor gasoline crack spread calendar swap and RBOB crack spread swap futures contracts will decrease to $100 from $240 for clearing members, to $110 from $264 for members, and to $135 from $324 for customers. Margins for all other months will be $100 for clearing members, $110 for members, and $135 for customers.

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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.

Contact: Anu Ahluwalia , 212-299-2439

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