@siva @Bhuvanesh suppose with enough funds a options buyer exercised his call option on TCS with ITM. So at 3 30 pm only he will pay the lot size X Strike price and buy the shares?. So next day at 9 am only he can sell right BTST ?
Or T+2 demat sell only allowed?
And What if spot comes down well below strike the very next day? The whole ITM exercise is futile?
Like US or somewhere in between exercise before expiry is not allowed right?