Futures Rolls Explained: When, Why and What It Costs
Every futures contract expires. Holding a position across expiry means closing one month and opening the next — and that is not a free operation. The roll costs the spread between the two contracts plus two sets of commissions.
Why contracts expire at all
A future is an obligation to deliver or receive a physical good, or to settle an index, on a specific date. When that date arrives the contract stops being a market and becomes a settlement. Anyone still holding it must deliver, receive, or have it cash-settled.
Continuous charts hide this. A chart of "ES" going back five years is a stitched-together series of quarterly contracts, and the stitching points are rolls. The chart does not show the spread you paid to move between them.
Two delivery structures
| Monthly (e.g. CL, NG) | Quarterly (e.g. ES, NQ, 6E) | |
|---|---|---|
| Listed months | All 12 | Mar / Jun / Sep / Dec (H, M, U, Z) |
| Liquidity | Concentrated in front months | Concentrated in the nearest quarter |
| Roll frequency | Monthly if you hold continuously | Quarterly |
| Roll cost | Higher — more frequent | Lower |
| Settlement | Usually physical | Usually cash (indices, FX) |
When to roll
The general rule: roll when open interest in the next contract exceeds the current one. That is the point where liquidity has moved and staying in the old month starts costing you in spread.
| Contract type | Typical roll window | Why |
|---|---|---|
| Equity index (ES, NQ) | 3–5 days before expiry | Volume shifts cleanly to the next quarter |
| Energy (CL, NG) | 5–10 days before expiry | Physical players dominate the last week |
| Metals (GC, SI) | 2–3 weeks before first notice | Liquidity moves early |
| Grains | Varies by crop cycle | Delivery month is genuinely physical |
| Treasuries | Around the quarterly cycle | Rolls tied to the quarterly refunding |
Your broker's cut-off is earlier than the exchange expiry. Brokers send a monthly notice listing first notice and last trading days for each contract. Missing it can mean forced liquidation at an unfavourable price, or in the case of physical contracts, an obligation you cannot meet.
What the roll costs
Two components:
- The calendar spread — the price difference between the expiring and next contract. In contango the next contract is higher, so a long position pays to roll up. In backwardation it is lower, so a long position is paid.
- Two sets of commissions — closing one contract and opening another
Example: rolling one CL contract
| Item | Amount |
|---|---|
| Front month sale | $68.40 |
| Next month purchase | $68.70 |
| Spread paid (contango) | $0.30 × 1,000 bbl |
| Spread cost | $300 |
| Commissions (both legs) | ~$4–$8 |
| Total | ~$305 |
On a 1,000-barrel contract that is 0.45% of notional, paid every month a position is held through a roll. Held for a year, a continuously rolled crude position pays several percent in roll costs alone — which is why commodity index funds underperform spot prices in contango markets.
Contango and backwardation
| Contango | Backwardation | |
|---|---|---|
| Curve shape | Later months higher | Later months lower |
| Cause | Storage and financing costs exceed convenience yield | Current scarcity — the spot is bid |
| Long roll effect | Pays each roll | Earns each roll |
| Typical market | Gold, equity indices (financing) | Oil in a supply shock, grains in a shortage |
How to roll in practice
- Roll as a spread, not two separate market orders — a calendar spread order gets both legs at a defined price
- Roll before liquidity thins, not on the last day
- Check the direction — long positions roll sell-near/buy-far; short positions do the opposite
- Watch for contract changes — some rolls change tick size or contract unit, which changes your risk
See the specification table for delivery months of every contract, and the margin guide for what happens to your requirement across the roll.
Frequently asked
Do I have to roll, or does it happen automatically?
It is never automatic. Your broker may liquidate an expiring position, but it will not open the next month for you.
What happens if I hold to expiry?
Cash-settled contracts settle in cash against the final settlement price. Physically settled contracts require delivery — 1,000 barrels of crude or 5,000 ounces of silver — which retail accounts cannot take.
Is the roll a loss?
It is a cost, not a disappearance. Your position continues at the new price; the spread you paid is real money out.
Most-looked-up contracts
- E-mini S&P 500 (ES)
- E-mini Nasdaq-100 (NQ)
- Crude Oil (CL)
- Gold (GC)
- Euro FX (6E)
- Corn (ZC)
- Silver (SI)
- Natural Gas (NG)
- Copper (HG)
Complete list of all 135: futures contract specifications.