ITM, ATM, OTM

Every option lives in one of three states

Moneyness is a fancy word for one simple question: where is the strike sitting relative to the current stock price? The answer puts every option into one of three buckets. In-the-money (ITM), at-the-money (ATM), or out-of-the-money (OTM). The bucket determines how much the option costs, how much intrinsic value it has, and how likely it is to make money.

For CALLS: a call is ITM when the stock price is ABOVE the strike (you'd profit by exercising). ATM when the stock is at the strike. OTM when the stock is BELOW the strike (no intrinsic value). For PUTS it's the mirror: a put is ITM when the stock is BELOW the strike, ATM at the strike, and OTM when the stock is ABOVE the strike. Two key sentences to memorize and you've got it.

How moneyness affects cost. AAPL at $200. A $190 call (ITM) might cost $12 — $10 intrinsic + $2 extrinsic. A $200 call (ATM) might cost $5 — pure extrinsic. A $210 call (OTM) might cost $1 — pure extrinsic, less of it because it needs a bigger move. ITM is most expensive (you're buying real intrinsic value). ATM is medium. OTM is cheap. The cheaper they get, the less likely they are to pay off.

How moneyness affects probability of profit. A rough rule of thumb: deep ITM options behave a lot like owning the stock — high cost, high probability of finishing profitable. ATM options are roughly 50/50. OTM options are below 50% probability, often well below. There's a real number behind this called delta, which we'll cover in the Greeks chapter — but for now just know that cheap doesn't mean good. Cheap usually means improbable.

Recap: ITM = already in-the-money, expensive, high probability. ATM = at the strike, balanced. OTM = needs a move, cheap, low probability. Calls: ITM when stock > strike. Puts: ITM when stock < strike.