Expiration Dates
Weekly: Every Thursday. Monthly: Last Thursday of month. Quarterly: March, June, September, December.
Key Dates
- Monthly expiry: Last Thursday
- Weekly expiry: Every Thursday
- Triple witching: Quarterly expiry
Trading Around Expiry
- Avoid new positions 2 days before
- Close or roll existing positions
- Max pain theory application
Planning
Mark all expiry dates in calendar. Plan entries and exits around these dates.
Why the Expiry Calendar Governs the Trading Week
Expiry dates are the fixed points around which the entire options trading week revolves, because on each one contracts cease to exist and settlement forces positions to close. In the Indian market index options expire weekly, with Nifty and Bank Nifty settling on different weekdays, giving traders fresh contracts and fresh volatility every few sessions. Knowing the calendar in advance lets a trader plan position entries, avoid holding a decaying position through an unwanted settlement and capitalise on the seasonal rhythm of the market.
The structure has changed over time: previously all Nifty options expired on the last Thursday of the month, but the shift to weekly expiries created far more frequent opportunities and also far more frequent traps. A trader who forgets which day their contract expires can wake up to find a position squared off automatically, or worse, left with an in-the-money premium worth collecting but missed through inattention.
Weekly vs Monthly Expiry Structure
- Weekly expiries: Nifty and Bank Nifty settle on separate weekdays, resetting the option chain each reset.
- Monthly expiries: the last business day of the month, when the full chain for the next month becomes the front month.
- Weekly restart: new weekly strikes list on the Monday following each weekly expiry.
Key Dates Beyond Expiry Itself
Beyond the settlement day, several dates matter for position planning. The day before expiry marks the final time to roll or close a position, when afternoon volatility often spikes as traders square off. Rollover dates, where significant open interest moves from the expiring series into the next, signal where institutional positioning is heading. Result and budget dates inject event-driven volatility that amplifies or destroys option value regardless of the technical picture.
Settlement Mechanics Every Trader Should Know
Index options settle in cash: on the expiry day, any in-the-money contract is converted to its intrinsic value and credited or debited automatically, with no physical delivery. The final settlement price is derived from the closing price of the underlying on the expiry day, and the cut-off for buying or selling to avoid an unwanted exercise is well before the close. For single-stock options, delivery is possible when deeply in the money, so confirm whether your broker handles delivery or squares off automatically.
Building a Personal Expiry Calendar
Maintain a pocket calendar that lists every weekly and monthly expiry, plus the quarterly and series rollovers, so no settlement catches you off guard. Mark the local market holidays because a holiday shifts an expiry forward to the previous business day. Add personal reminders for the days you intend to take advantage of increased premium on Thursday and the high-volume rollover window when the next series opens. Updating this calendar at the start of each month costs minutes and prevents costly lapses.
Using the Calendar to Plan Strategies
- Enter credit spreads with comfortable time to expiry so theta works in your favour.
- Close or roll positions one day before expiry rather than fighting afternoon volatility.
- Time event trades such as straddles around known results and budget dates.
- Align the chosen contract's life with the horizon of your market forecast.
The Discipline of Settlement Awareness
Traders who internalise the expiry calendar stop treating settlement as a surprise and instead bend it to their advantage. The calendar tells you when premium is rich and about to evaporate, when a new series offers clean fresh strikes, and when a holiday risks a painful auto-close. Planning the week around these fixed points converts expiry from a source of anxiety into a scheduling advantage within a consistent, calendar-aware options routine.
Building Your Own Expiry Calendar
Mark not just the contract expiry but the early hours of the expiry day, the series roll window two days before, and any corporate results overlapping the expiry. Guard against surprise holidays that shift settlement, and keep a two-week look-ahead pinned in your trading dashboard. Treat an expiry falling on a truncated session as higher-risk because theta compresses across fewer trading hours.
Planning Around India's Month-End Cluster
Monthly expiries in India frequently land in the same week as RBI monetary policy statements, inflation prints and advance-tax dates, so the last expiry of the month can carry event risk far beyond ordinary settlement. Where a weekly expiry is mostly a theta event, mark a monthly expiry intercepted by a policy date as a volatility event and prefer clearly defined risk until the announcement is behind you.
Build a parallel column beside your expiry list for scheduled macro items: the monthly policy calendar, the February Union Budget and the quarterly results season of your watchlist stocks. When a headline clashes with settlement day, shrink size instead of finding reasons to keep the position. The calendar exists to keep you prepared, not to promise you a trade.
