Rollover is the process of moving a position from a contract that is about to expire into a later-dated one so your market exposure continues. In practice that means closing the near contract and opening the next, often as a single calendar spread.
In spot FX and many CFDs, rollover can also mean carrying a leveraged trade past the market’s cut-off time. You keep the position open and pay or receive a daily financing charge, sometimes called the swap.
When do traders roll and how is it done?
You roll when an instrument has a set expiry and you want to stay invested. Futures and options are the usual cases. Commodities, equity indices and rates futures all have last trading days, and options have expiries where rights lapse. If you do nothing, your exposure ends and, in some contracts, you could face delivery or cash settlement.
The cleanest way to roll a futures position is to trade a calendar spread, for example sell June and buy September in one ticket. This prices the difference between months and reduces the risk of being filled on one leg but not the other. You can also leg the trades separately, though that exposes you to intraday moves between the fills.
A simple workflow looks like this:
- Check the contract calendar. For physically delivered commodities, note first notice date, not just last trade date.
- Choose your target month, usually the next liquid contract on the curve.
- Look at the spread market to see the going roll price, then place a limit order in the spread or two linked orders in the outrights.
- Confirm fills, update your records and verify the new expiry, tick value and margin.
Equity and index traders often follow a house convention, such as rolling a week before expiry, to avoid thinning liquidity on the final days.
Futures rolls: spreads, term structure and roll yield
The price gap between futures months reflects storage, financing and convenience yield. When later contracts trade above the near month, the market is in contango. When later months are cheaper, it is in backwardation.
That gap matters for your cost. Suppose you are long 5 crude oil futures at 100 in the front month. The next month is 101. To keep the position, you sell the front at its market price and buy the next at 101. Ignoring fees, the roll costs 1 per barrel, multiplied by the contract size. If contracts are 1,000 barrels, the roll cost is 1,000 per contract, 5,000 total. That cost is not a trading loss from direction. It is the price of moving along the curve. If the curve were backwardated at 99, you would pick up a 1 per barrel benefit.
Hold a rolling long through time and these differences stack up into what traders call roll yield. Negative roll yield in persistent contango drags returns, while positive roll yield in backwardation adds to them. The effect can be large in commodities with storage constraints.
Execution details vary by venue. Some traders roll with market-on-close instructions in the spread, others use passive limits earlier in the roll window to reduce slippage.
Options rolls: up, down or out
Rolling options means closing one option and opening another to reshape risk without exiting the idea. You might roll out, keeping the strike but extending the expiry. You might roll up or down, changing the strike at the same or a later expiry. Spreads can be rolled as a package, for example moving a call spread from this month to next.
The net result can be a debit or a credit. For instance, buying back a short call that has gained value and selling a later-dated call could increase premium outlay if time value is higher. A roll also changes your Greeks. Longer-dated options usually carry more vega, and moving the strike alters delta, which can shift your hedge needs.
Be mindful of assignment. If a short option is near the money close to expiry, some traders roll earlier to avoid being assigned on the short leg.
FX and CFD rollover: overnight financing and swaps
Spot FX conventionally settles two business days after the trade. Brokers roll positions each day using a tom-next swap so retail accounts do not take delivery. The cash result for you is a daily financing charge or credit based on the interest rate gap between the two currencies, plus or minus the provider’s spread. Some venues apply a larger charge on one day each week to account for weekend days. Exact mechanics vary by provider.
CFDs come in two flavours for this. Cash-index and share CFDs typically apply an overnight financing rate to positions you carry past the cut-off. Futures-based CFDs mirror the underlying futures contract. Providers may roll the CFD when the future rolls and apply a price adjustment so the chart remains continuous. The approach and timing differ by firm, so check product terms.
What does a rollover cost and how it shows in P&L
There are several moving parts:
- The spread or price difference between expiries, which creates a benefit or cost when you switch months.
- Bid–offer spread and commissions on the two trades, plus any exchange or clearing fees.
- Financing in FX and cash CFDs, calculated daily and shown as a swap or funding line.
In a futures roll, the closing trade crystallises realised P&L relative to your entry in the expiring month. Your new basis then resets to the price of the later contract. For example, long one contract from 95, you sell the front at 100 and buy the next at 101. You book a realised gain of 5 on the close, and you carry a new long from 101. Your overall economic exposure to the commodity has not changed, but the accounting splits it between realised on the old leg and future moves from the new entry.
On statements you might see separate line items: trade fills for the close and open, a spread differential if traded as a calendar, and any financing or adjustment labelled rollover or swap.
Practical pitfalls and how to plan a roll
Leaving it too late can be costly. Liquidity often dries up as expiry looms, spreads widen and the risk of a partial fill rises. Physical contracts add extra dates, such as first notice, that you must avoid if you do not want delivery risk.
Mind the basis. The near and next contract can move differently around storage reports, dividend dates for index constituents, or seasonal shifts. A spread that looked stable can gap on a data point that barely moves the headline price.
Use limits where possible. A calendar spread limit order anchors the price difference you accept for the roll and helps manage slippage.
Plan around known events. Options traders often roll before earnings if implied volatility is likely to jump or collapse. FX traders note which day carries the multi-day swap. Futures traders often follow a standard roll schedule for each asset class, such as equity indices in the quarterly roll months.
Check size, margin and contract specs. Later months can have different margin or tick values. Verify the new settings before increasing size. Keep an eye on your open positions after the roll to confirm the exposure matches what you intended.
Rollover is also used outside trading to mean refinancing maturing debt, for example when a company replaces a bond with a new issue. The idea is similar, you extend the term of an obligation, but the mechanics and risks are different and depend on credit markets.
Handled deliberately, rolls are just housekeeping, a tidy way to maintain exposure while managing costs and operational risk.