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Stock Market · Options Theory

Physical settlement of options

Since 2019, ITM stock options in India are physically settled at expiry. This is different from index options, which remain cash-settled. Understanding physical settlement prevents nasty expiry surprises.

What physical settlement means for stock options

If you hold an ITM stock option at expiry, you either receive or deliver actual shares:

• Long ITM call: you must PAY the full strike price × lot size to receive shares
• Long ITM put: you must DELIVER shares at the strike price (you receive cash)
• Short ITM call: you must DELIVER shares at the strike price
• Short ITM put: you must PAY to BUY shares at the strike price

An ITM short call at expiry requires you to deliver shares you may not own. If you don't own them, your broker buys them in the auction market. Potentially at a significant premium.

Expiry week margin increases

In the last 5 days before expiry, SEBI mandates increased margin for stock F&O positions. For deep ITM options, the margin requirement can jump to near the full delivery value. Requiring large capital top-ups.

Many retail traders are force-closed during expiry week simply because they can't meet the higher margin requirements.

Index options: cash-settled (no physical delivery)

Nifty and Bank Nifty options remain cash-settled. The final P&L is calculated from the final settlement price, no actual shares change hands.

Always close stock option positions 2–3 days before expirythe safe rule for retail traders

The short-seller's nightmare

Short OTM options that become ITM near expiry trigger delivery obligations. What seemed like a safely-OTM short can quickly become a multi-lakh obligation. This is why option sellers must monitor positions actively through expiry week.

Takeaway. ITM stock options settle by physical share delivery at expiry. A long ITM call means buying the shares, a short ITM call means delivering them. Carrying one into expiry converts an options position into a full-value equity obligation, and the margin requirement climbs in the days beforehand to match.