Exercise

What Exercise Means

Exercise is the option buyer's act of using their contractual right — buying the underlying at the strike for a call, or selling it at the strike for a put. Only the holder (buyer) can exercise; the seller has the matching obligation through assignment. An option is only worth exercising if it is in-the-money.

In practice, most traders close their option positions in the market rather than exercising, capturing the premium directly. Exercise matters most at expiry, when in-the-money options are settled automatically.

European vs American Exercise

The exercise style defines when a holder may exercise. European-style options can be exercised only at expiry; American-style options can be exercised any time up to expiry. American options therefore carry a small extra premium for the added flexibility. Index options globally are usually European; many stock options are American.

Exercise in the Indian Market

Nifty and BankNifty options are European-style, so they can only be exercised at expiry, and they are cash-settled — an in-the-money option automatically pays its intrinsic value in cash on Thursday, with no manual exercise or share delivery. NSE stock options are physically settled, so exercise there can trigger actual delivery. This distinction drives how positions are managed into expiry.

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