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What is Expiry?

Expiry is the fixed date on which an options or futures contract ceases to exist — after which an in-the-money option is exercised and settled, and an out-of-the-money option simply lapses worthless.

Quick answer: Expiry is the fixed date on which an options or futures contract ceases to exist — after which an in-the-money option is exercised and settled, and an out-of-the-money option simply lapses worthless.

In simple words

Think of every derivative as having a built-in deadline. Until that date you can buy or sell the contract freely. On the expiry date the contract is 'cashed out' one final time against the market: if it has value (in-the-money) you receive that value; if it has no value (out-of-the-money) it disappears and the premium you paid, or collected, is gone. For Indian index options like Nifty, this final settlement is done automatically in cash — you do not have to do anything.

Purpose

Expiry exists so a derivative can reference a definite point in time. An option is a bet on where the underlying will be by a certain date; without a fixed end date, there would be nothing to price time decay or settlement against. Expiry converts an open contract into a final, cash-or-delivery outcome and lets the exchange close out all obligations cleanly.

Visual explanation

What is Expiry?

Every option and futures contract moves from open, through the holding period, to expiry — where it is exercised or lapses.

Contractopensbuy / sell to openHoldingperiodtime decay worksExpirydaylast trading dayITM → exercisesettled in cash/sharesOTM → lapseexpires worthlessEvery option and futures contract follows this lifecycle from open to settlement.

Professional explanation

What actually happens on the expiry date

On the expiry date the contract trades normally until the market closes. The exchange then fixes a settlement price for the underlying and compares it to each option's strike. In-the-money options are automatically exercised (auto-exercise) and settled; out-of-the-money options expire worthless and are removed. Futures are marked to the final settlement price and closed. After this, the contract no longer exists and cannot be traded, held or transferred.

Cash settlement for Indian index options

All Indian index derivatives — Nifty, Bank Nifty, FinNifty and Sensex options and futures — are cash-settled. No shares or index units change hands. Instead the exchange pays or collects the net difference between the strike and the final settlement price. For a Nifty 25,000 call that finishes with the index at 25,120, the buyer receives (25,120 − 25,000) = 120 points × the lot size, in cash, with no delivery obligation.

Why every trader must respect expiry

Expiry is the moment a position's theoretical value becomes a realised, final number. Time value that was cushioning a losing option vanishes; a small move can flip an at-the-money option's outcome; and for physically-settled stock options, an in-the-money finish can create an unexpected delivery obligation. Understanding expiry is therefore not optional — it is the difference between a controlled exit and a surprise.

Practical example (Nifty / Bank Nifty)

Illustrative — Nifty spot 25,000, lot size 75

Nifty is at 25,000 and you hold one lot (75) of the 25,100 CE (call), for which you paid ₹60. Two outcomes at expiry: (a) Nifty settles at 25,180 — your call is in-the-money by 80 points, so you are auto-exercised and receive 80 × 75 = ₹6,000 in cash (a net profit of ₹6,000 − ₹4,500 premium = ₹1,500 before charges). (b) Nifty settles at 24,950 — your call is out-of-the-money, expires worthless, and you lose the full ₹4,500 premium.

The same contract on a single stock — say a Reliance 3,000 CE — would instead be physically settled: an in-the-money finish would obligate you to take delivery of the shares (lot size × ₹3,000 of stock), which is why many traders square off stock options before expiry.

Advantages

  • Creates a definite, poolable settlement point so the exchange can clear all obligations cleanly.
  • Enables time-based pricing — theta, the expiry calendar and the whole term structure only make sense because contracts end.
  • Cash settlement (for index options) makes closing out effortless — no delivery, no logistics, automatic credit or debit.

Limitations

  • Time value disappears at expiry, so an option that is 'nearly right' can still finish worthless.
  • Physically-settled stock options can create unwanted delivery obligations if held in-the-money to expiry.
  • The fixed date concentrates risk: gamma and pin risk spike on the final day, making outcomes hard to control.

Why it matters in practice

  • Know your contract's exact expiry date and last trading time before you enter — never be surprised by it.
  • Decide in advance whether you will hold to expiry (and accept settlement) or square off beforehand.
  • For stock options, treat an in-the-money finish as a delivery event, not just a cash P&L.
  • Remember that out-of-the-money options are worth exactly zero the instant they expire, however close they were.

Common mistakes

  • Assuming an option keeps some value at expiry — at expiry it is worth only its intrinsic value, which is zero if out-of-the-money.
  • Forgetting that Indian stock options are physically settled and being caught with a delivery obligation.
  • Confusing the expiry date with the settlement date — trading ends on expiry, but funds/shares settle a day or two later.
  • Holding a losing option 'in hope' into the last hour, when time decay and gamma make the outcome most brutal.

Professional usage

Professionals plan the whole trade around expiry from the outset. They size positions for the gamma and pin risk of the final day, decide their square-off rule before entering, track whether each instrument is cash- or physically-settled, and never let an in-the-money stock option drift into an unintended delivery. To them, expiry is not an event that happens to a position — it is a parameter they manage.

Key takeaways

  • Expiry is the date a contract ceases to exist; after it, an option is worth only its intrinsic value.
  • Indian index options are cash-settled automatically; single-stock options are physically settled.
  • Decide your hold-or-square-off rule and know your settlement type before expiry arrives, not on the day.

Frequently asked questions

What is option expiry in simple terms?
Option expiry is the date an options contract ends. After it, the option is either exercised (if in-the-money) and settled, or it expires worthless (if out-of-the-money). It can no longer be traded or held.
What happens to my option on the expiry date?
It is settled against the final settlement price. If it is in-the-money, it is automatically exercised and you receive the intrinsic value (in cash for index options). If out-of-the-money, it lapses and is worth nothing.
Do I need to do anything for my option to be exercised at expiry?
No. Indian exchanges use automatic exercise (auto-exercise) — any in-the-money option is exercised for you by the exchange at expiry. You do not need to place an exercise instruction.
Are Nifty options cash-settled or physically settled?
Cash-settled. All Indian index options and futures (Nifty, Bank Nifty, FinNifty, Sensex) are settled in cash against the final settlement price — no delivery of the index takes place.
What happens if my option expires out-of-the-money?
It expires worthless. A buyer loses the entire premium paid; a seller keeps the entire premium received. The contract is then removed from your account.
Is the expiry date the same as the settlement date?
No. The expiry date is the last day the contract trades; settlement of funds (or shares) happens on a later settlement date, typically the next working day for cash settlement.
Can I sell my option before expiry instead of holding it?
Yes, and most traders do. You can square off (sell what you bought, or buy back what you sold) any time up to the last trading moment on expiry day, capturing the remaining premium.
Why do options lose value as expiry approaches?
Because of time decay (theta). An option's time value shrinks as the deadline nears and there is less time for the underlying to move, so out-of-the-money and at-the-money options bleed value fastest in the final days.
What is the difference between option expiry and futures expiry?
Both end on the same expiry date, but a future is simply marked to the final settlement price and closed, while an option is exercised only if in-the-money and otherwise lapses. Futures always settle; options settle only if they have value.
Does every option contract have an expiry date?
Yes. Every exchange-traded option and futures contract has a fixed expiry date defined in its contract specification. There is no such thing as a perpetual exchange-traded option in India.
What time do Indian options expire on expiry day?
Trading continues until the normal market close (3:30 PM IST) on the expiry day. The final settlement price is derived from the underlying's last 30 minutes, and settlement is processed after the close.
Can an option be exercised before its expiry date?
Indian index and stock options are European-style, meaning they can only be exercised at expiry, not before. American-style early exercise does not apply to NSE/BSE options.

Voice search & related questions

Natural-language questions people ask about What is Expiry?.

What does it mean when an option expires?
It means the contract has reached its end date and no longer exists. If it was in-the-money it pays out its intrinsic value; if out-of-the-money it becomes worthless.
What happens on options expiry day in India?
The option trades until the 3:30 PM close, the exchange fixes the final settlement price from the last 30 minutes, in-the-money options are auto-exercised and cash-settled, and out-of-the-money options expire worthless.
Do Nifty options settle in cash?
Yes, Nifty and all Indian index options are cash-settled — you receive or pay the cash difference, and there is no delivery of the index.
What if I forget to close my option before expiry?
For index options, nothing bad happens — an in-the-money option is auto-exercised for cash, an out-of-the-money one just lapses. For stock options, an in-the-money finish triggers physical delivery, which can be costly, so those are better squared off.
Is expiry the last day to trade an option?
Yes. The expiry date is the last trading day; you can buy or sell the option any time until the market closes that day, after which it is settled and removed.

Sources & references

Last reviewed 11 July 2026. Educational content only — not investment advice. Exchange rules change; verify current conventions on NSE/BSE.

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Educational content only — not investment advice. Examples use illustrative numbers and current exchange conventions that may change. Options and futures involve substantial risk. See our Risk Disclosure and SEBI Disclaimer.