An option is said to be at the money if the spot price of the underlying is equal to the strike price. Any movement in the spot price of underlying from this stage would either make the option ITM or OTM.
Moneyness is a term describing the relationship between the strike price of the option contract and the current market price of the underlying asset. There are three types of moneyness, In-The-Money (ITM), At-The-Money (ATM) and Out-Of-The-Money ...