How Does an Option’s ‘Moneyness’ Relate to the Delta Option Greek?
Delta measures the sensitivity of an option's price to a $1 change in the underlying asset's price. OTM options have a Delta closer to zero because a small price change is less likely to move them into the money.
ITM options have a Delta closer to 1 (for calls) or -1 (for puts), as their price moves nearly dollar-for-dollar with the underlying asset. ATM options have a Delta near 0.5 or -0.5.