Physical delivery risks in stock F&O
Overview
Physical delivery risk in stock F&O is the exposure a trader carries when a single-stock futures or in-the-money stock option position is held into expiry and converts into an obligation to take or give delivery of the underlying shares at full contract value. The hazard is the gap between the small premium that prices an option and the large contract value behind it: a long in-the-money call bought for a few thousand rupees can become an obligation to pay several lakh rupees and receive the entire lot (NSE Clearing physical-settlement framework). Stock derivatives on the National Stock Exchange have been physically settled since October 2019; index derivatives are cash settled and carry none of this risk.
Three risks sit inside physical settlement. The first is the size mismatch: a position the trader thought of as a small premium bet turns into a multi-lakh delivery. The second is short delivery: a trader obliged to give shares who does not hold them is bought in at auction, at a price that can run well above the market close, plus a penalty. The third is the cost of taking or giving delivery even when it goes smoothly, a full charge stack rather than a single brokerage line. These risks are why Zerodha auto-squares-off some positions before expiry, and why the standing advice is to close in-the-money stock positions rather than let them settle.
This article sets out the obligation-versus-premium mismatch, the short-delivery auction and close-out mechanics with their penalty, the cost of completing a delivery, the broken-hedge case, and the reasoning behind Zerodha’s pre-expiry auto square-off. It sits alongside the schedule in physical delivery timing on Zerodha and the exit guide in how to avoid physical settlement of options .
The obligation dwarfs the premium
An option premium prices the option. The delivery obligation is the full value of the shares under it. Those are different orders of magnitude, and the gap is where most physical-delivery surprises come from.
Take a long call on a stock trading at Rs 1,500 with a lot size of 400. The premium might be Rs 30 per share, Rs 12,000 for the lot, the most the buyer can lose on the option itself. The contract value, what taking delivery costs, is Rs 1,500 times 400, or Rs 6,00,000. If the call finishes in the money and is exercised, the buyer is obliged to pay that Rs 6,00,000 and take 400 shares into demat . A trader who sized the position as a Rs 12,000 bet now faces a six-lakh cash call. The leverage that makes options attractive is the same leverage that makes the delivery obligation large relative to the premium.
The same mismatch hits the short side harder, because a short in-the-money call is an obligation to deliver shares the writer may not own. The premium received is the cap on the gain. The obligation to deliver is uncapped in the sense that the cost of sourcing the shares, if the writer does not hold them, is set by the market and the auction, not by the premium. This is the structural reason naked option writing into expiry is treated as a high-risk activity, covered for margin in naked option selling margin on Zerodha .
Short delivery: the buy-in auction and close-out
The sharpest risk in physical settlement is short delivery: a trader on the give-delivery side, a short in-the-money call or a long in-the-money put settled into a sell obligation, who fails to deliver the shares on the settlement day. The obligation does not vanish; it goes to a buy-in auction.
On the T+2 settlement day NSE Clearing identifies shortages, debits the defaulting member the value of the undelivered shares at a valuation price, and conducts a buying-in auction through the trading system to source the shares for the buyer who was due them (NSE Clearing shortages handling). If the auction price comes in above the valuation price, the defaulting member, and so the client, makes good the difference.
Where the shares cannot be bought in at all, a close-out applies, and the close-out price is deliberately punitive:
| Close-out reference | Value used |
|---|---|
| Highest traded price | From expiry day up to and including the auction day |
| Premium over closing | 20 per cent above the official closing price on the auction day |
| Close-out price | The higher of the two figures above |
The defaulting seller pays this close-out value. Because it takes the higher of a multi-day high or a 20 per cent premium, it sits well above where the stock traded on expiry day, by design, so that defaulting is never cheaper than delivering. On top of the auction or close-out difference, a short-delivery penalty of 0.05 per cent per day applies on the member and is passed to the client (NSE Clearing), and any short-margin penalty the exchange levies on the member is passed on as well.
The illiquid-stock case is the worst version. A short in-the-money call on a thinly traded F&O stock, settled into a delivery the writer cannot meet, can be closed out at a price 20 per cent or more above the expiry close, turning a modest expected loss into an outsized one. This is the auction risk the how to avoid physical settlement of options guide warns short writers about specifically.
The cost of taking or giving delivery
Even when delivery proceeds without default, completing it costs more than closing the position would have. Taking delivery of shares from an exercised call means paying the full contract value in cash by the T+2 pay-in, then, when the trader sells the delivered shares, paying STT at 0.1 per cent on the sale, brokerage on that sale, exchange transaction charges, the SEBI turnover fee, stamp duty on the buy leg, GST on the brokerage and exchange components, and a DP charge of Rs 15.34 per scrip on the sell. That charge stack, detailed in options exercise charges at Zerodha , replaces what would have been one flat Rs 20 brokerage line to close the option in the market.
The DP charge is a flat per-scrip levy that does not scale with quantity, so it weighs more heavily on small delivery quantities. The exercise itself carries the heavier STT line covered in STT on options exercise , 0.15 per cent of intrinsic value rather than 0.15 per cent of premium. None of these costs is avoidable once delivery runs; all of them are avoided by squaring off before expiry.
Broken hedges leave a one-sided obligation
Netting cancels delivery when equal give and take positions exist in the same stock, as set out in physical delivery timing on Zerodha . A trader long two lots of futures and short two lots of in-the-money calls on the same stock has a zero net obligation. The risk is the broken hedge.
If one leg is closed, expires differently, or is assigned in a way the trader did not model, the cancellation fails and a one-sided obligation appears. A short call that the trader expected to net against a long future, where the future was squared off intraday on expiry day, leaves a naked give-delivery obligation with no offsetting take-delivery to cancel it. The trader is then on the short-delivery path with its auction and close-out risk. Hedged positions are not delivery-risk-free; they are delivery-risk-free only while the hedge holds intact through the settlement.
Why Zerodha auto-squares-off some positions
Zerodha closes some stock F&O positions before expiry to cap delivery risk, and the reason traces to a specific regulatory change. The do-not-exercise facility, which let a trader instruct that an in-the-money option not be exercised, was discontinued for non-CTM strikes by an NSE circular dated 14 October 2021. From that point, any in-the-money contract that was not a close-to-money strike was mandatorily exercised, so an option buyer could no longer rely on dropping an in-the-money option to avoid delivery.
That change raised the risk that an out-of-the-money option turning in the money late in the expiry session, with no liquidity to exit, would force a large delivery the trader never intended. Zerodha’s response was to square off risky positions ahead of expiry where the client’s free balance does not cover the delivery requirement, rather than let an unfunded delivery obligation form. The do-not-exercise facility was reinstated for CTM strikes from 28 April 2022, where CTM, close-to-money, means the first three in-the-money strikes immediately on either side of the settlement price, covered in do not exercise option . For positions outside that narrow band, the practical protection is to close before expiry or accept that Zerodha’s risk system may close the position, with any auto square-off charges that applies.
The auto square-off is a risk cap, not a courtesy. It can execute at market into thin expiry-session liquidity, so it is not a substitute for the trader exiting cleanly. The reliable defence is to act on the delivery-margin block when it first appears at Expiry minus 4, square off the in-the-money position, or roll it per how to roll over an F&O position on Zerodha , well before the session closes.
Reducing physical-delivery risk
The risks above share one defence: do not carry an in-the-money stock position into the expiry close unless delivery is the intended outcome and the funds or shares are arranged. Squaring off before expiry removes the obligation, the auction risk, and the heavier exercise levy in a single market trade, the route in how to avoid physical settlement of options . For traders who do want the shares, how to physically settle an in-the-money option sets out funding the contract value by the T+2 pay-in. The short-delivery consequence of failing to deliver is detailed in short delivery and cash settlement on Zerodha .
See also
- How to avoid physical settlement of options
- Short delivery and cash settlement on Zerodha
- Physical delivery timing on Zerodha
- Physical settlement of stock F&O
- STT on options exercise
- Options exercise charges at Zerodha
- How to physically settle an in-the-money option
- How to roll over an F&O position on Zerodha
- Do not exercise option
- Unsquared options on expiry
- Auto square-off charges
- Naked option selling margin on Zerodha
- SPAN margin on Zerodha
- F&O segment on Zerodha
- Zerodha F&O charges
- F&O taxation in India
- SEBI study on retail F&O losses
- F&O trading risks
- Expiry day options trading
- Stock futures lot size on NSE
- Futures and options
- Demat account
- Nifty
- Bank Nifty
- Zerodha
- Kite by Zerodha
- National Stock Exchange
- Securities and Exchange Board of India
External references
- Physical delivery of stock F&O and their risks (Zerodha Z-Connect)
- Zerodha policy on physical settlement of equity derivatives (support)
- NSE Clearing shortages handling
- National Stock Exchange
- Securities and Exchange Board of India
References
- SEBI circular SEBI/HO/MRD/DRMNP/CIR/P/2018/67, dated 11 April 2018, on physical settlement of stock derivatives.
- NSE circular discontinuing the do-not-exercise facility for non-CTM contracts, dated 14 October 2021; reinstated for CTM strikes from 28 April 2022.
- NSE Clearing shortages handling and close-out framework (close-out at the higher of the highest price from expiry to auction day or 20 per cent above the auction-day closing price; 0.05 per cent per day short-delivery penalty).
- Zerodha policy on physical settlement of equity derivatives, support.zerodha.com, as of 21 June 2026.