News Release

NYMEX to Change Margins for Natural Gas Basis, Swing Swap Futures Contracts

Thu Nov 02 2006

NEW YORK, NY, November 2, 2006 — The New York Mercantile Exchange, Inc. today announced that it will change margins for its natural gas basis swap and swing swap futures contracts, beginning tomorrow.

Margins for the first month of the NGPL Mid-Continent basis swap futures contract will increase to $700 from $600 for clearing members, to $770 from $660 for members, and to $945 from $810 for customers. Margins for all months remain unchanged.

Margins for the first month of the Northwest Pipeline, Rockies basis swap futures contract will increase to $1,200 from $1,000 for clearing members, to $1,320 from $1,100 for members, and to $1,620 from $1,350 for customers. Margins for all months remain unchanged.

Margins for the first through sixth months of the Transco Zone 6 basis swap futures contract will not change. Margins for the seventh through 12th months will increase to $700 from $300 for clearing members, to $770 from $330 for members, and to $945 from $405 for customers. Margins for all other months will increase to $700 from $400 for clearing members, to $770 from $440 for members, and to $945 from $540 for customers.

Margins for the ANR Oklahoma, CenterPoint natural gas, Dawn natural gas, Demarcation, Dominion, NGPL Mid-Continent, NGPL Tex/OK, Panhandle, and Ventura swing swap futures contracts will decrease to $2,000 from $3,500 for clearing members, to $2,200 from $3,850 for members, and to $2,700 from $4,725 for customers.

Margins for the Chicago Citygate and El Paso Permian swing swap futures contracts will decrease to $2,000 from $3,600 for clearing members, to $2,200 from $3,960 for members, and to $2,700 from $4,860 for customers.

Margins for the Houston Ship Channel and Waha swing swap futures contracts will decrease to $2,000 from $5,000 for clearing members, to $2,200 from $5,500 for members, and to $2,700 from $6,750 for customers.

Margins for the Kern River Opal, PG&E Citygate, and SoCal swing swap futures contracts will decrease to $2,000 from $4,500 for clearing members, to $2,200 from $4,950 for members, and to $2,700 from $6,075 for customers.

Margins for the San Juan swing swap futures contract will decrease to $2,000 from $4,000 for clearing members, to $2,200 from $4,400 for members, and to $2,700 from $5,400 for customers.

Margins for the Sumas swing swap futures contract will decrease to $2,000 from $4,300 for clearing members, to $2,200 from $4,730 for members, and to $2,700 from $5,805 for customers.

Margins for the TETCO M-3 swing swap futures contract will decrease to $2,000 from $4,600 for clearing members, to $2,200 from $5,060 for members, and to $2,700 from $6,210 for customers.

Margins for the Transco Zone 6 swing swap futures contract will decrease to $2,000 from $4,200 for clearing members, to $2,200 from $4,620 for members, and to $2,700 from $5,670 for customers.

# # #


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

Corporate Communications

+1 312 930 3434
Email