News Release

Exchange to Change Margins on Some NYMEX ClearPort® Futures Contracts

Thu May 04 2006

NEW YORK, N.Y., May 4, 2006 — The New York Mercantile Exchange, Inc., today announced margin changes for several of its NYMEX ClearPort® petroleum products and spread futures contracts, as of the close of business on Friday.

The margins on the high–low sulfur fuel oil spread swap futures contract will decrease to $8,000 from $9,000 for clearing members, to $8,800 from $9,900 for members, and to $10,800 from $12,150 for customers.

Margins on the dated–to–frontline Brent swap futures contract will increase to $200 from $120 for clearing members, to $220 from $132 for members, and to $270 from $162 for customers.

The margins on the Gulf Coast jet fuel calendar swap futures contract will decrease to $5,000 from $9,000 for clearing members, to $5,500 from $9,900 for members, and to $6,750 from $12,150 for customers.

The margins on the Gulf Coast gasoline calendar swap futures contract will decrease to $6,000 from $6,500 for clearing members, to $6,600 from $7,150 for members, and to $8,100 from $8,775 for customers.

Margins on the Gulf Coast #6 fuel 3% swap futures contract will increase to $3,000 from $2,800 for clearing members, to $3,300 from $3,080 for members, and to $4,050 from $3,780 for customers.

Margins on the New York Harbor Conv. gas vs. NYMEX unleaded gasoline spread swap futures contract will decrease to $3,000 from $4,000 for clearing members, to $3,300 from $4,400 for members, and to $4,050 from $5,400 for customers.

The margins on the Singapore fuel oil spread swap futures contract will decrease to $1,000 from $2,000 for clearing members, to $1,100 from $2,200 for members, and to $1,350 from $2,700 for customers.

The margins on the European 1% fuel oil calendar swap (Northwest Europe) and European 3.5% fuel oil Rotterdam calendar swap futures contracts will decrease to $15,000 from $16,000 for clearing members, to $16,500 from $17,600 for members, and to $20,250 from $21,600 for customers.

The margins on the European 1% fuel oil Rotterdam calendar swap futures contract will decrease to $15,000 from $20,000 for clearing members, to $16,500 from $22,000 for members, and to $20,250 from $27,000 for customers.

Margins on the Singapore gasoil vs. Rotterdam gasoil swap futures contract will increase to $3,000 from $2,000 for clearing members, to $3,300 from $2,200 for members, and to $4,050 from $2,700 for customers

Margins for the first month of the East/West fuel oil spread swap futures contract will increase to $6,000 from $5,000 for clearing members, to $6,600 from $5,500 for members, and to $8,100 for customers. Margins on all other months will decrease to $4,000 from $5,000 for clearing members, to $4,400 from $5,500 for members, and to $5,400 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: Brenda Guzman , 212-299-2436

Corporate Communications

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