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Mont Belvieu Iso-Butane (OPIS) Futures Contract Specs

Contract Unit 42,000 gallons
Price Quotation U.S. dollars and cents per gallon
Trading Hours 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 0.00001 per gallon = $0.42
Product Code CME Globex: A8I
CME ClearPort: 8I
Clearing: 8I
Listed Contracts Monthly contracts listed for the current year and the next 4 calendar years. List 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 is equal to the arithmetic average of the OPIS Mt. Belvieu Iso-Butane (non-LDH) price for each business day during the contract month.
Termination Of Trading Trading terminates on the last business day of the contract month.
Position Limits NYMEX Position Limits
Exchange Rulebook NYMEX 406
Block Minimum Block Minimum Thresholds
Vendor Codes Quote Vendor Symbols Listing