Asset Class Navigation

Henry Hub Natural Gas Last Day Financial Futures Contract Specs

Contract Unit 2,500 million British thermal units (mmBtu).
Price Quotation U.S. dollars and cents per mmBtu
Trading Hours CME Globex: Sunday - Friday 6:00 p.m. - 5:15 p.m. New York time/ET (5:00 p.m. - 4:15 p.m. Chicago Time/CT) with a 45-minute break each day beginning at 5:15 p.m. (4:15 p.m. CT)
CME ClearPort: Sunday - Friday 6:00 p.m. - 5:15 p.m. New York time/ET (5:00 p.m. - 4:15 p.m. Chicago Time/CT) with a 45-minute break each day beginning at 5:15 p.m. (4:15 p.m. CT)
Minimum Price Fluctuation $0.001 per mmBtu
Product Code CME Globex: NN
CME ClearPort: NN
Clearing: NN
TAS: NNT
Listed Contracts The current year plus the next twelve calendar years. A new calendar year will be added following the termination of trading in the December contract of the current year.
Settlement Method Financially Settled
Floating Price The Floating Price for each contract month will be equal to the NYMEX (Henry Hub) Natural Gas Futures contract final settlement price for the corresponding contract month on the last trading day for that contract month.
Termination Of Trading Posting of transactions shall cease on the 3rd business day prior to the contract month.
Trade At Marker Or Trade At Settlement Rules Trading at settlement is available for spot (except on the last trading day), 2nd and 3rd months and subject to the existing TAS rules. Trading in all TAS products will cease daily at 2:30 PM Eastern Time. The TAS products will trade off of a "Base Price" of 0 to create a differential (plus or minus 10 ticks) versus settlement in the underlying product on a 1 to 1 basis. A trade done at the Base Price of 0 will correspond to a "traditional" TAS trade which will clear exactly at the final settlement price of the day.
Settlement Procedures Delivery under the contract shall be by cash settlement. Final settlement, following termination of posting for a contract month, will be based on the Floating Price. The final settlement price will be the Floating Price calculated for each contract month.

Daily NYMEX Henry Hub Futures Settlement Procedure (PDF)
Final NYMEX Henry Hub Natural Gas Last Day Financial Futures Settlement Procedure (PDF)
Position Limits NYMEX Position Limits
Exchange Rulebook NYMEX 508
Block Minimum Block Minimum Thresholds
Price Limit Or Circuit Trading halts and price limits for this contract are subject to the provisions governing Special Price Fluctuation Limits for Henry Hub Natural Gas Futures set forth in Chapter 220.
Vendor Codes Quote Vendor Symbols Listing