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What is rollover in futures and options
Rollover in F&O means closing your position in the expiring near-month contract and simultaneously opening an equivalent position in the next-month contract, to carry your view forward beyond expiry. Rollover percentage is a closely watched metric in the last week of every expiry.
In one line
For an individual account, rollover means closing an expiring futures or options position and opening a later-expiry position. Published aggregate rollover ratios compare expiry-level open interest, but do not link the two legs or reveal whether the later inventory is long, short, a hedge or a spread.
BazaarBaaziSource & method
Why futures expire and what rollover solves
Every futures and options contract has a fixed exchange-specified expiry date. NSE expiry weekdays and available products have changed over time, so the current contract specification should be checked instead of assuming the old last-Thursday convention. If you want to maintain exposure beyond expiry, you can close the expiring contract and open a later one.
The cost of rolling is called the roll cost or roll yield, which is the difference between the near-month price and the next-month price (the spread). If the next month trades at a premium to the expiring contract, rolling a long position costs money. If it trades at a discount (backwardation), rolling benefits a long position. Roll cost is a recurring charge for traders who continuously carry directional futures exposure.
Reading rollover percentage as a sentiment tool
Around expiry, exchanges and data platforms publish expiry-level open interest and derived rollover ratios. The exact formula must be stated. Because public aggregate OI does not link an account's closing near-month leg to its opening later-month leg, the ratio is an inventory distribution measure rather than a count of identified positions transferred.
Comparing the ratio with its own history can show whether later-expiry inventory is unusually large by that formula. Price direction does not solve the identity problem: the inventory can contain longs and shorts, hedges, spreads and new participants. Use it as descriptive contract-structure context, not proof of bullish or bearish conviction.
Rollover in options: a different mechanic
Options rollover works differently because options have no intrinsic obligation the way futures do. An option holder can let the contract expire (worthless if OTM) or close it. If you want to maintain a directional options bet across expiry, you sell the expiring option and buy the same strike (or an adjusted one) in the next expiry. This is called rolling your options position.
The cost of rolling an options position depends on the time value in the next contract relative to the one being closed. Rolling a long call from near-month to next-month costs the difference in premium, plus you are paying for additional time value. For options sellers, rolling a short position into the next month collects additional premium, which is a core strategy in systematic covered-call and put-selling approaches.
FAQ4 reader questions · AEO-eligible
Common questions on what is rollover.
When should I roll over a futures position?
Most traders roll over 2 to 3 days before expiry to avoid settlement risk and thin liquidity in the expiring contract on the last day. Rolling too late risks wide spreads and poor execution.
What does 70% rollover mean?
It means the published later-expiry open-interest ratio is 70% under that provider's stated formula. It does not prove that 70% of the same accounts transferred positions, because aggregate OI does not link legs or accounts.
Is rollover bullish?
Not by itself. Aggregate rollover data does not identify long versus short ownership, hedges or spread legs. It describes where open inventory sits across expiries and needs separate position and price evidence.
What is the roll cost in futures?
Roll cost is the price difference between closing the near-month contract and opening the next-month contract. If the next month trades at a premium, a long position pays a roll cost. If the next month is at a discount, the long benefits from a positive roll.
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