ITM option squareoff or let it expire

I take sell in banknifty ITM option with strike price 42000 call option at 1400 Rs. It is now at 1100 Rs. so i have profit.
on expiry day end if profit remains like this, shud i buy it back or shud i let it get auto exercise…which is more better from brokerage cost point of view?

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Index options are cash-settled, if you do not square-off the position on expiry, ITM positions are settled at the intrinsic value by the exchange. Also, as the position is ITM, the brokerage will be applicable.

The additional STT of 0.125% is applicable only for Long ITM option positions, since you’re holding a short position, the STT is already paid and it’ll not be applicable.