9A.14 Physical settlement of stock options

The rule Stock options are European (exercise only at expiry; for contracts expiring from 27 Jan 2011 per M08 · 8.11) and physically settled: SEBI made physical settlement mandatory for all stock derivatives in circular SEBI/HO/MRD/DOPI/CIR/P/2018/161 of 31 Dec 2018, in three batches completed with the October 2019 expiry. The do-not-exercise facility for stock options was discontinued from the March 2023 expiry (NSE Clearing circular NCL/CMPT/55330 of 20 Jan 2023, para g), and since then cash-segment and F&O delivery obligations of the same client in the same stock are netted (same circular, under SEBI circular SEBI/HO/MRD2_DCAP/P/CIR/2022/165 of 30 Nov 2022). At expiry, every ITM option is exercised and assigned:

Position at expiry, ITM	Obligation
Long call	buy lot × shares at $K$ (pay $K\times$lot)
Short call	deliver lot × shares, receive $K\times$lot
Long put	deliver lot × shares, receive $K\times$lot
Short put	buy lot × shares at $K$ (pay $K\times$lot)

The trap, quantified (illustrative numbers, not a sourced episode) A stock trades near ₹1,500 with a lot of 500 shares (both illustrative; read the lot from NewBrdLotQty). In expiry week a trader buys the 1,480 call for ₹5 (₹2,500 per lot) as a cheap bet. The stock settles at 1,500. The option is ITM by ₹20, so intrinsic value is ₹10,000, but the obligation is to pay $1{,}480\times500=\text{₹}7{,}40{,}000$ and take delivery of shares worth ₹7,50,000. A ₹2,500 position became a ₹7.4 lakh cash requirement. A short put at 1,520 ends with the obligation to buy shares at ₹7,60,000 that are worth ₹7,50,000. Brokers raise margins on ITM stock options in expiry week toward the delivery value and may square off positions themselves (M08 · 8.11; check your broker's policy).

Costs STT on options exercised is 0.15% of intrinsic value, charged to the buyer (from 1 Apr 2026; NSE circular NSE/FATAX/73524). Physically settled contracts also generate a delivery in the cash market, with its own charges; read your broker's charge sheet for how STT and stamp duty are applied to delivery-settled F&O, because the treatment differs from cash-settled index options.

Case material This module could not source a documented, dated episode of a retail trader caught by physical settlement with verifiable numbers. The example above is illustrative.

Practitioner rules Close or roll ITM and near-the-money stock options before the last day unless you intend to make or take delivery. A short option that is OTM at 15:00 can finish ITM at settlement; the obligation is decided by the settlement price (from 7 Dec 2026, the stock's VWAP over the last 30 minutes of continuous trading across all exchanges; SEBI circular of 15 Oct 2026, para 4.9), not by where the option traded during the day.

9A.14.1Single-stock F&O: a risk checklist#

Physical settlement is one of six risks that index derivatives do not have, or have in milder form. Before any stock future or option position, check each:

1. Ban period (MWPL). When the market-wide futures-equivalent OI in a stock exceeds 95% of its market-wide position limit, the stock enters a ban: you may only reduce positions, and from 1 Oct 2025 any trade must reduce your end-of-day futures-equivalent position. The MWPL is the lower of 15% of free float and 65 times average daily delivery value, with a floor of 10% of free float (SEBI circular SEBI/HO/MRD/TPD-1/P/CIR/2025/79 of 29 May 2025, paras 5.2–5.3). A position you cannot add to or hedge with the same stock's derivatives is a position you cannot manage; check the exchange's daily ban list and how close the stock is to it (M04A · 4A.11).
2. Physical settlement (this section): an ITM position at expiry is a delivery obligation for the full contract value.
3. Results-day gap × leverage. Losses are on notional, margin is a fraction of notional. For a gap $g$ and a margin rate $m$ (SPAN plus ELM as a fraction of notional), the overnight loss as a multiple of the margin posted is $g/m$; as a fraction of capital $C$ it is $g\,n\,N/C$ for $n$ lots of notional $N$. Stocks gap far more than the index around results (M06A · 6A.1–6A.3).
4. Corporate actions. On splits, bonuses, rights, demergers and dividends at or above 2% of the stock's market value, the exchanges adjust strikes, lot sizes and futures prices so that positions keep their value (SEBI circulars SMDRP/DC/CIR-8/01 of 21 Jun 2001, SMDRP/DC/CIR-15/02 of 18 Dec 2002 and CIR/MRD/DoP-1/P/00108/2018 of 5 Jul 2018; the 2% dividend threshold from 29 Jun 2022 under SEBI/HO/MRD2/MRD2_DCAP/P/CIR/2022/90). An unadjusted ordinary dividend still moves the stock on the ex-date; adjusted contracts trade with odd lot sizes and strikes for the rest of their life. M01 · 1.10 gives the adjustment factors.
5. Liquidity. Most stock option strikes trade thinly outside the near month and a few strikes around the money; filter the bhavcopy by TtlTradgVol to see it. The bhavcopy has no quotes; a close-based IV on a strike with little volume is not a price you can trade (9A.2, pitfall 4).
6. Margin changes. Clearing corporations raise margins on volatile stocks, and brokers raise them further on ITM stock options in expiry week toward the delivery value. A margin increase on a losing position is a second call on cash at the worst moment (M07 · 7.2).