News Release

Nymex to Change Margins for Petroleum Products Futures Contracts

Wed Sep 06 2006

New York, N.Y., September 6, 2006 — The New York Mercantile Exchange, Inc. today announced margin changes for some of its petroleum products futures contracts on NYMEX ClearPort®, beginning at the close of business on September 7.

Margins for the Gulf Coast jet oil and Gulf Coast heating oil calendar swap futures contracts will decrease to $4,500 from $5,000 for clearing members, to $4,950 from $5,500 for members, and to $6,075 from $6,750 for customers.

Margins for the New York Harbor residual fuel 1% sulfur swap futures contract will decrease to $2,750 from $3,000 for clearing members, to $3,025 from $3,300 for members, and to $3,713 from $4,050 for customers.

The margins for the first month of the Gulf Coast gasoline vs. Gulf Coast heating oil spread swap futures contract will increase to $5,000 from $2,500 for clearing members, to $5,500 from $2,750 for members, and to $6,750 from $3,375 for customers.

The margins for the Gulf Coast jet fuel vs. New York Harbor No. 2 heating oil spread swap futures contract will increase to $1,500 from $1,200 for clearing members, to $1,650 from $1,320 for members, and to $2,025 from $1,620 for customers.

Margins for the New York Harbor gasoline vs. New York Harbor heating oil 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.

The margins for the No. 2 heating oil up-down spread calendar swap futures contract will increase to $1,000 from $675 for clearing members, to $1,100 from $743 for members, and to $1,350 from $911 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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