Contract Month
Contract month (also called delivery month or expiry month) is the specific calendar month in which a futures contract reaches its delivery or cash settlement date, identifying which point along the futures curve a particular contract represents and determining the tenor of the underlying price exposure.
Key takeaways
- Each commodity and financial futures contract has a defined expiration cycle (e.g., WTI crude oil trades all 12 calendar months; corn trades only March, May, July, September, December).
- The 'front month' is the nearest-expiration actively traded contract; the 'back months' are deferred contracts further along the curve.
- Ticker codes for futures contracts encode the contract month: F (January), G (February), H (March), J (April), K (May), M (June), N (July), Q (August), U (September), V (October), X (November), Z (December).
- Open interest and volume are typically concentrated in the front one to three contract months; deferred months can have wide bid-ask spreads.
- Roll date — when traders transition from the expiring front month to the new front month — is a critical liquidity event that generates roll yield (positive or negative).
Explanation
The contract month is the basic unit of the futures term structure, allowing traders to select the exact time horizon of their price exposure. Different market participants use different contract months according to their underlying economic needs. An oil refiner purchasing crude oil three months forward to hedge a customer commitment will use the contract month corresponding to that delivery date. A macro trader expressing a view on oil prices over the next year may trade back-month contracts to avoid the noise of near-term physical supply/demand.
Expiration cycles vary by commodity and reflect the underlying physical market's seasonality and delivery logistics. Agricultural futures (corn, soybeans, wheat) trade specific contract months tied to the crop cycle — corn trades H (March), K (May), N (July), U (September), Z (December). Energy products trade all 12 months because petroleum demand is relatively continuous throughout the year. Financial futures (S&P 500, Treasury bonds, Eurodollars) trade quarterly expiration cycles (H, M, U, Z) timed to correspond with institutional portfolio rebalancing and corporate earnings cycles.
The last trading day and first notice day (for physical delivery contracts) are critical calendar events. First notice day — the first day on which holders of long futures positions can be served notice of delivery — typically precedes the contract month's last trading day by two to three weeks. Investors who do not want physical delivery must close or roll their long positions before first notice day. Cash-settled contracts (e.g., E-mini S&P 500) lack first notice day but expire at the open or close of their contract month's settlement date.
Roll timing is a significant operational consideration for commodity funds. Most commodity index funds and ETPs maintain a rolling schedule published in advance (the Bloomberg Commodity Index rolls from the 5th to 9th business day of the month preceding expiration). Large, predictable rolling by commodity index investors creates a mechanical price pattern: front-month contracts face selling pressure during the roll window while the new front-month faces buying, causing temporary widening of the calendar spread — a phenomenon exploited by roll-timing arbitrageurs.
Example
An investor in the United States Oil Fund ETF (USO) examines its holdings in early October 2024. USO holds the November 2024 WTI crude oil contract (CLX4 in Bloomberg/CME notation). The November contract's last trading day is October 21, 2024; first notice day is October 31 (for cash-settled equivalents, the final settlement is on the last business day of October). USO begins rolling on October 9, systematically selling CLX4 and buying CLZ4 (December 2024) over a rolling schedule. If WTI is in contango by $0.70 per barrel month-to-month, the roll results in selling November at approximately $73.00 and buying December at approximately $73.70 — a cost of $0.70 per barrel, or roughly 0.96% of notional, crystallized in a single month's roll.
Related terms
Calendar Spread Cash Settlement Commodity Index Contango Delivery Futures Contract Futures Curve Iron Condor Isda Master Agreement Margin Call Mixed Swap Portfolio Rebalancing