I watched last month that even on expiry date premium in bank nifty strike prices are much higher than nifty strike prices?

Option premium is combination of intrinsic value(how much the option is in the money) and time value. Try to consider this way.

Also try to compare the ratio of time value to intrinsic value of Options Contracts with strikes near Spot price. U will find everything is okay :slight_smile:

Dont go by the absolute values try to calculate in % terms when comparing two things in stock mkt :slight_smile:

So what is your question?