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Henry Hub Natural Gas Last Day Financial Futures Contract Specs

Contract Unit CME Globex: NN – 2,500 MMBtu per day
                      NNE (clears as NN) – 2,500 MMBtu per month
CME ClearPort: NN 2,500 MMBtu per month or per day
Price Quotation U.S. dollars and cents per MMBtu
Trading Hours CME Globex: Sunday - Friday 6:00 p.m. - 5:00 p.m. (5:00 p.m. - 4:00 p.m. CT) with a 60-minute break each day beginning at 5:00 p.m. (4:00 p.m. CT)

TAS: Sunday - Friday 6:00 p.m. - 2:30 p.m. (5:00 p.m. - 1:30 p.m. CT)
CME ClearPort: Sunday - Friday 6:00 p.m. - 5:00 p.m. (5:00 p.m. - 4:00 p.m. CT) with a 60-minute break each day beginning at 5:00 p.m. (4:00 p.m. CT)
Minimum Price Fluctuation 0.001 per MMBtu = $2.50

TAS: Zero or +/- 10 ticks in the minimum tick increment of the outright
Product Code CME Globex: NN
CME ClearPort: NN
Clearing: NN
TAS: NNT
Listed Contracts Monthly contracts listed for the current year and the next 12 calendar years. Add monthly contracts for a new calendar year 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 Trading terminates on the 3rd last business day of the month prior to the contract month.
Trade At Marker Or Trade At Settlement Rules Trading at Settlement (TAS) is subject to the requirements of Rule 524.A. TAS trades off a "Base Price" of zero (equal to the daily settlement price) to create a differential versus the daily settlement price in the underlying futures contract month. The TAS clearing price equals the daily settlement price of the underlying futures contract month plus or minus the TAS transaction price.

TAS Table
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
Position Limits NYMEX Position Limits
Exchange Rulebook NYMEX 508
Block Minimum Block Minimum Thresholds
Price Limit Or Circuit Price Limits
Vendor Codes Quote Vendor Symbols Listing