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What is futures rollover and how does it work in NSE/BSE F&O markets?
What is futures rollover in Indian F&O markets: how rolling over works, the cost of roll (roll spread), how rollover percentage is interpreted as a sentiment indicator, and the monthly expiry calendar for NSE.
In one line
Futures rollover is the process of squaring off an expiring futures contract (near month) and initiating a new position in the next month's contract (far month) to maintain continuous directional exposure beyond the current expiry without delivery.
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How rollover works
NSE stock futures and index futures expire on the last Thursday of each month. An investor who is long a Nifty October futures contract must either close the position before expiry or roll it over into November futures. Rolling over involves selling the October contract (closing the near-month position) and buying the November contract (opening a far-month position) simultaneously.
The roll spread is the price difference between the near-month and far-month contracts. In a normal (contango) market, far-month futures trade at a premium to near-month (reflecting the cost of carry: financing cost minus expected dividends). The roll cost for a long holder is the premium paid when moving from a near-month to a far-month contract.
Rollover is routinely done in the last few days before expiry (the rollover window). NSE monitors and publishes rollover data daily during this window. High rollover percentages indicate that a large share of the existing open interest has been rolled to the next month, suggesting position holders are maintaining their directional bets rather than closing them.
Reading rollover data as a sentiment indicator
Rollover percentage measures what portion of the open interest in an expiring contract has been carried forward to the next month. Industry convention is to compare current rollover with the 3-month average rollover to assess whether positioning is above or below normal.
High rollover with price rising (longs being carried forward) is bullish: investors are confident enough to pay the roll cost to maintain long positions. High rollover with price falling (shorts being carried forward) is bearish. Low rollover indicates profit-booking or risk reduction rather than conviction continuation.
FAQ2 reader questions · AEO-eligible
Common questions on what is futures rollover.
What is the difference between rolling over and settling futures?
Settlement means the futures contract expires and the P&L is settled in cash (cash settlement for Indian futures -- there is no physical delivery of shares for most stock futures). The investor's position is closed at the final settlement price. Rolling over is different: the investor actively closes the expiring position before final settlement and opens a new position in the next contract month, maintaining continuous market exposure beyond expiry.
What is cost of carry in futures pricing?
The cost of carry is the theoretical premium of a futures contract over the spot price, reflecting the cost of holding the underlying asset from now until expiry. For equity futures, cost of carry = spot price x (risk-free rate) x (days to expiry / 365) minus expected dividends. When a futures contract trades above the theoretical cost of carry price (premium to fair value), it signals bullish sentiment; below fair value (discount) signals bearish sentiment.
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