Overview
What is it:
These terms describe an option's relationship between the current stock price and its Strike Price. An option is in-the-money when the current stock price is above the strike price, meaning exercising would produce a gain, and out-of-the-money when the current price is below the strike price, meaning there's no spread and the option carries no exercise value.
Why does it matter:
Knowing which state your options are in lets you accurately assess whether vested options are currently worth exercising, rather than assuming a vested option automatically carries value the way a vested share does.
What do people most often get wrong:
People often treat an out-of-the-money option as worthless. An option that's underwater today can still have real value if there's meaningful time left before expiration and the stock has room to recover. It's worth nothing to exercise today, but there's still a chance the stock price rises above the strike price before expiration, giving the option renewed value.