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.