AI Expiry Planner: Review Your Trade Before Expiry

This AI expiry planner opens a general AI Trade Analyzer for a manually entered trade. It reviews prices and context you enter; it does not select an expiry or inspect an option chain, the list of available contracts and quotes. Use the expiry rules below to check the contract separately, then enter your proposed trade for a risk review. AI comments can be wrong.

Check the contract before reviewing the trade

As checked on 16 October 2026, NSE lists Nifty weekly options for Tuesday expiry and monthly options for the last Tuesday of the month. A trading holiday brings expiry forward to the previous trading day. Bank Nifty options have monthly and quarterly expiries; they do not have a current weekly series. Match the expiry displayed in your broker’s contract description to the exchange listing.

The weekday change comes from NSE circular NSE/FAOP/68747 dated 25 June 2025. Its transition distinguishes existing contracts from newly introduced contracts, so an old screenshot can show a different weekday. NSE/FAOP/64506 dated 10 October 2024 discontinued Bank Nifty, Fin Nifty and Midcap Nifty weekly options, retaining weekly index options only on Nifty at NSE.

A weekday rule is a starting point, not an exact holiday-adjusted date. Confirm the listed expiry for the particular series before using any countdown. The lot-size and expiry reference explains why the contract month matters.

Which indices expire when

The table gives the standing rule. The next actual date can differ when a holiday falls on the weekday. The lot size and expiry calendar lists dates, and the expiry day calculator helps with the arithmetic. Always confirm the date in your broker's contract name.

What the displayed form actually accepts

Quick Analysis is useful for checking the arithmetic of a proposed entry, stop and target. The detailed route gives the AI more of your reasoning. Neither route turns a vague description such as “next weekly Bank Nifty” into a valid contract. Resolve the instrument and expiry before requesting comments.

For an option-premium example, enter premium-based Entry, Target and Stop Loss values consistently. Mixing an index level with an option premium produces a meaningless price difference. A rising index view also does not determine whether the option position itself is long or short; check the actual position direction.

Worked example: a manually entered Nifty premium plan

This is a made-up long-option plan, not a trade suggestion. Assume Entry ₹150, Target ₹180, Stop Loss ₹135, Lots 1 and Capital ₹1,00,000. Select Nifty 50. NSE’s lot file, opened on 16 October 2026, lists 65 units for the October, November and December 2026 series; the current form also uses that multiplier.

Quick Analysis displays the risk percentage as 1.0%, rounded from 0.975%. These calculations exclude charges, the gap between buying and selling quotes, and execution at a worse price than the stop. ₹975 describes the assumed stop exit, not the maximum possible option loss. If the stop cannot be filled as planned, the realised loss can be larger.

Use the risk-reward calculator to inspect the price distances separately. For a different series, confirm the applicable lot quantity before repeating this example. The form’s preset multiplier cannot establish the terms of every future contract.

A copyable expiry-day trading plan

Fill this in before the market opens. Keep it short so you can follow it under pressure. It is a record of your own rules, not advice.

1. Date, contract and expiry, and where you confirmed them.
2. Key levels you will watch, written before the open.
3. Your view for the day, and what would prove it wrong.
4. Setups you allow yourself. Everything else is skipped.
5. Position size in lots, and the rupee amount you will risk per trade.
6. Maximum loss for the day. When it is reached, you stop.
7. Maximum number of trades for the day.
8. A cut-off time after which you take no new trade. Choose a time well before the derivatives close.
9. What you do if you are in a loss after the cut-off: close, hold or hedge, decided now.
10. A line for what you will review tonight.

Use the risk per trade calculator to turn a rupee limit into a lot count. Keep these rules the same for several expiries before you judge them. Sometimes the plan says no trade, and that is a valid result.

Why premiums swing so hard on expiry day

Two Greeks explain most of it. Gamma is how fast delta changes. Near expiry, an at-the-money option has high gamma, so a small move in the index can turn a cheap option into a valuable one, or the reverse. Theta is time decay. With little time left, an option with no intrinsic value loses its remaining premium quickly. Together, they give big percentage swings in cheap options. The theta decay entry and the Greeks guide have more.

Read estimates and scores with care

The detailed wizard contains estimates such as trade score, expected value, probability of profit, margin and a loss scenario. Its probability uses an internal assumption linked to the entered reward-to-risk ratio. It is not an observed success rate for your setup, a fitted expiry model or a result measured from your journal.

Expected value means the average outcome implied by the assumed chances and payoffs. It inherits that probability assumption. A positive displayed estimate therefore does not show that the trade has a profitable edge. The margin shortcut is not your broker’s requirement, and the loss-scenario label does not establish a maximum loss. Check margin, settlement exposure and available funds independently.

The form also calculates absolute price differences. A neatly displayed risk figure cannot prove that the stop makes sense for the direction or option structure. Read the price levels yourself, especially when working with sold options or a spread, which combines option positions. The current single-position form cannot express the combined payoff of every multi-leg position.

What happens if you hold options to expiry

Options that finish in the money are exercised at expiry. Options that finish out of the money expire worthless, and the buyer loses the premium paid. Settlement differs by product. Stock options are settled by physical delivery of shares, which needs cash or shares in your account. For index options, NSE Clearing describes cash settlement, but some NSE contract pages word it differently, so read the specification of the contract you hold. See cash settlement and physical settlement.

Option buyers can pay Securities Transaction Tax (STT) when an in-the-money option is exercised at expiry. Check the current rate in the STT calculator and your contract note. Brokers may also square off positions before expiry and charge for it, so read your broker's policy.

Common expiry-day mistakes

• Buying too many cheap options because each one costs little.
• Selling near-the-money options without a defined risk.
• Chasing a move after the cut-off time or after a loss.
• Ignoring the bid-ask spread on thin strikes.
• Entering without knowing the contract's exact expiry.
• Treating a probability score from any tool as a forecast.

Beginners can trade on expiry day, but it is a fast environment. Many traders choose to skip it until they have a track record in calmer sessions. That is a personal decision, and the journal can show how your expiry-day trades compare with the rest.

Build an expiry-day note you can review later

• Write the complete contract name, expiry and the source used to confirm them. Keep the observation time with any external market information.
• Record why the entry, stop and target were chosen. State what would make you cancel the idea before entering.
• List open positions and combined exposure outside the single-trade form. Allow for charges and imperfect exits.
• Choose a personal review and exit plan. Keep it in your own notes; this page does not schedule reminders or manage an order.
• After the trade, compare the actual fill and behaviour with the original plan rather than judging only the final profit.

The expiry-day trading guide gives further context for reviewing expiry exposure. A separate options Greeks calculator can illustrate model sensitivities; its assumptions and inputs still need checking. Neither calculation predicts the next price move.

OneTradeJournal records trades by hand. You can log your stop, target, strategy, emotions, mistakes and plan deviation, then review your reports. The pre-trade checklist can warn; it cannot prevent an order. OneTradeJournal is not a broker or SEBI-registered adviser and does not place trades.

Questions about the AI expiry planner

Sources

• NSE expiry-day revision and transition circular, opened 16 October 2026.
• NSE weekly-index option discontinuation circular, read 16 October 2026.
• NSE Nifty contract expiry rules and Bank Nifty specifications, checked 16 October 2026.
• NSE market-lot file, retrieved 16 October 2026; use the column for the contract series.