Moneyness

ITM, ATM, OTM

A call option is in-the-money when the underlying trades above the strike price, out-of-the-money when it trades below it, and roughly at-the-money when the two sit close together. For a put, the relationship flips: in-the-money means the underlying trades below the strike, and out-of-the-money means it trades above it. An option's premium splits into two components as a result — intrinsic value, the amount by which the option is already in-the-money and worth exercising today (zero for an at-the-money or out-of-the-money option), and time value, the remainder of the premium, which reflects the market's estimate of the chance the option still moves further into the money before expiration arrives. Every quoted option price is simply the sum of those two pieces, in whatever proportion the current moneyness dictates.

What Moneyness Drives

Moneyness is the single biggest input into an option's delta — a deep in-the-money option carries a delta near 1 (or -1 for puts) and moves almost point-for-point with the underlying, while a far out-of-the-money option carries a delta near zero and barely moves at all as the underlying shifts around it. It also drives theta decay and assignment probability directly: an in-the-money option carries meaningfully higher odds of being exercised or assigned at expiration than an out-of-the-money one does, and the two erode along very different time-value paths as expiration approaches, with at-the-money options typically decaying fastest of the three because they hold the most time value relative to their price at any given moment.

Choosing Moneyness by Goal

Selecting a strike is really selecting a moneyness, and the choice encodes the underlying goal of the position rather than simply a view on where price is headed next. An out-of-the-money strike sold for premium favors the option expiring worthless and the seller collecting the income outright, month after month; a deep in-the-money strike sold as a covered call instead favors being called away at a defined, already-decided price, trading away further upside for a larger, more certain premium collected today. Reading moneyness alongside delta and time-to-expiration together completes the basic vocabulary needed to describe any option position on the books, alongside the strike price and expiration date themselves — the four coordinates any position can be fully located by.