Comment on How to use the option calculator?

NAJEEB T P commented on 19 Oct 2017, 09:01 AM

Hello Kartik,
Inputting the data into Zeroda BS option pricing formula with Nifty yesterday underlying close at 10210.85 for a strike of 10300 call with expiry as 26/10/2017, 15 30 hrs ,current day AV as 12.26 and RBI 91day treasury bill yield as 6.07 outputs to 38.58 as the call option price.But if the same is input to as 24/10/2017 as expiry dates shaving of the 2 day trading holiday ,option call price reflects to 27.81(settlement price is 28.45). Diwali trading hour would compensate to that.So my question is , Is not imputing calendar days give distorted results in option pricing.
It would be appreciated if in the expiry column the default time is set as 15.30 hrs instead of 23.59 hrs.

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