I have a question regarding the strike price that is given on OptionMetrics. My goal is to primarily retrieve options prices of a specific maturity with strike prices that are 20% in-the-money, at-the-money and 20% out-the-money. In order to do so I need to use the direct relationship between the strike price $K$ and the spot price $S_t$.
The exact definition as given by Investopedia.com is:
For a call option, when the option's strike price is below the market price of the underlying asset, an option is In-The-Money.
When I use the date from OptionMetrics I find that my strike price is given in the form '257000' for instance, hence with header 'Strike price times 1000'. However the index price (market price) at that particular point in time is about 9580. This large difference holds for all observations.
How do I then calculate the amount that the option is in- or out-of-the money?
I am therefore wondering whether someone has experience with working with OptionMetrics and more specific on filtrating options that are say 20% in-the-money.