Nifty Expiry Day: Weekly Schedule, Settlement Rules and Index Calendar

Nifty expiry day is the date on which Nifty 50 futures and options contracts expire and reach final settlement. Understanding the expiry schedule is essential for anyone trading index derivatives in India.

When Is Nifty Expiry Day?

Nifty 50 weekly options expire every Tuesday. If Tuesday falls on a market holiday, expiry shifts to the previous trading day. Monthly expiry for Nifty 50 falls on the last Tuesday of each month.

This schedule took effect on September 2, 2025, when NSE moved its weekly expiry from Thursday to Tuesday as part of a broader restructuring of index derivative schedules.

Bank Nifty Expiry Day

Bank Nifty expiry day falls on every Wednesday. Monthly expiry for Bank Nifty falls on the last Wednesday of each month. Holiday adjustment follows the same rule: if Wednesday is a market holiday, expiry moves to the previous trading day.

Bank Nifty is India's second most actively traded index derivative after Nifty 50. It attracts heavy volume in at-the-money and near-the-money option strikes during expiry sessions.

Full Index Expiry Calendar

What Happens on Nifty Expiry Day?

On the Nifty 50 expiry day, the exchange calculates a final settlement price. This is determined by the average of Nifty 50 index values during the last 30 minutes of trading (3:00 PM to 3:30 PM IST).

Options expiring in-the-money receive automatic cash settlement equal to their intrinsic value. Options expiring out-of-the-money become worthless — the buyer loses the entire premium paid. No manual action is required; settlement is automatic.

Most active traders, however, close or roll positions before expiry rather than holding through settlement.

How Nifty Expiry Day Differs from Regular Sessions

Time decay accelerates sharply. Option premiums lose time value rapidly on expiry day. At-the-money options, composed almost entirely of time value, can see steep premium collapse even if the underlying index barely moves.

Intraday volatility increases. As participants square off positions, markets often experience sharper bidirectional moves than on regular trading days. Sudden swings in the final hour are common.

Open interest falls. Total OI in near-expiry contracts drops significantly as positions roll to next week or close entirely. This OI roll-off is visible in NSE option chain data during the expiry session.

Max Pain effect. The Max Pain level — the strike price at which total option buyers experience the highest aggregate loss — attracts close attention near expiry. Option writers often hedge near this level, influencing price action in the final trading hours.

Nifty 50 Expiry Day: Monthly vs Weekly

Weekly Nifty contracts expire every Tuesday and attract short-term directional and volatility trades. Monthly contracts serve longer-duration strategies and portfolio hedges.

Monthly expiry sessions typically generate higher total trading volume than regular weekly sessions. Large institutional participants tend to roll or close positions on monthly expiry day, creating elevated activity. The final Tuesday of each month often ranks among the highest-volume sessions of that month.

Nifty Weekly Expiry Day: Practical Points for Traders

The nifty weekly expiry day on Tuesday creates a concentrated activity window from Friday (post-Thursday close) through Tuesday. Positions opened on Wednesday or Thursday carry the risk of accelerated time decay over the following expiry cycle.

The nifty monthly expiry day (last Tuesday) sees additional complexity because the simultaneous expiry of current-month contracts and rollover into next-month contracts can create sharp price swings in the final session.

The NSE publishes an official derivatives expiry calendar listing all weekly and monthly dates with holiday adjustments. Traders can access this calendar directly from the NSE India website.