Any risk/additional cost in exercising Index Option Contract?

Hey, so last week was unusual… I’m just wondering, If I have a large quantity of Bank nifty contracts, and the market suddenly moves like 2000 points in my direction, is it okay to let the contract exercise if there are no buyers for that strike price?

I mean, I don’t need to have any money in my account on the day of expiry in order to exercise the contract, right? Only the difference between contract strike price and current market price will be transferred to my account, right?

I know this is a very basic query, but after what happened last week, I just want to make sure I won’t get screwed if I ever got stuck with a Deep ITM Index contract. Thanks :smile: