Bankniftyweekly option - One doubt

[knarendra]

Today BNF-20165 ( 22.9.16),@ 3.15 PM. But,
The the weekly option 20200 PE is Rs: 65/- .Today is weekly option closing day.
But still just 15 minits to closing Rs ; 30/- is higher in weekly option .

How to gain it? or its wrong?pl.explain .

 

[niftyaajkal]

the underlying index is BankNifty and not BNF
check BN value at that time and then co-relate.

 

[saurabhjain2005]

You should look at the index "Nifty Bank" and not BNF Future. As it expires weekly, the option rates depend on index, not future. In nifty, by expiry, Future and index become almost same as it loses all the premium, but in Banknifty, as the expiry is far, there is still a good amount of premium in BNF and hence the difference.