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Strike, expiration & moneyness

ITM, ATM, OTM and how expiration changes the trade.

9 min · Beginner · Free lesson

What you'll learn

  • Classify any call or put as in the money, at the money or out of the money
  • Explain how strike choice changes an option's cost and the move it needs
  • Describe how more time to expiration raises cost but gives the trade room to work

The idea

Every option has two dials you choose: the strike (the locked-in price) and the expiration (the deadline). Together they decide how much you pay and how far, and how fast, the stock must move for you to win.

Moneyness describes where the strike sits compared with the current stock price. It tells you whether the option already has built-in value today or is purely a bet on a future move.

Think of it like a race. The strike is the finish line and the expiration is the clock. An in-the-money option starts past the finish line. An out-of-the-money option starts behind it and has to run there before time runs out. The farther the finish line and the shorter the clock, the cheaper the ticket, and the less likely you are to finish.

How it works

Calls

  • In the money (ITM): stock price above the strike.
  • At the money (ATM): strike at or very near the stock price.
  • Out of the money (OTM): stock price below the strike.

Puts are the mirror image:

  • ITM: stock price below the strike.
  • ATM: strike at or near the stock price.
  • OTM: stock price above the strike.

What moneyness means for you

  • ITM options cost more because part of the price is real, built-in value. They move more like the stock.
  • ATM options are the middle ground and are the most sensitive to time decay in dollar terms.
  • OTM options are cheap because they are all "hope." They need a bigger move and they expire worthless more often.

Expirations

  • Weeklies expire every week (many large stocks and ETFs, some with several expirations per week).
  • Monthlies usually expire on the third Friday of the month.
  • LEAPS are long-dated options, often a year or more out.
  • More time costs more, but gives your setup room to develop. Less time is cheaper, but the clock is brutal near the end.

Worked example

Hypothetical stock ABC trades at $200. Here is a simplified set of 30-day call prices:

  • $190 call: $11.60. ITM by $10. You pay $10 of built-in value plus $1.60 for time and possibility.
  • $200 call: $5.00. ATM. All of this is time and possibility.
  • $210 call: $1.60. OTM by $10. Cheap, but ABC must climb above $211.60 by expiration to profit.

Breakevens at expiration:

  1. $190 call: $190 + $11.60 = $201.60
  2. $200 call: $200 + $5.00 = $205.00
  3. $210 call: $210 + $1.60 = $211.60

Now the puts on the same stock at $200:

  • $210 put is ITM by $10 (you could sell at $210 a stock worth $200).
  • $190 put is OTM by $10.

How expiration changes the same strike. The $200 call might be priced like this:

  • 7 days to expiration: $2.40 ($240)
  • 30 days: $5.00 ($500)
  • 60 days: $7.10 ($710)

Say your stock plan expects ABC to reach $210 within about three weeks. The 7-day contract is cheapest, but it expires before your idea is scheduled to play out. If ABC chops sideways for a week and then rallies, the weekly is already gone. The 30-day contract costs more, but it is still alive when the move comes. Twice the time does not cost twice the price: the 60-day costs $7.10, not $10.00. You pay less per day for longer-dated options.

The lesson: pick the expiration based on how long your stock setup needs, then add a buffer. Never pick it based only on which contract is cheapest.

Common mistakes

  • Buying far-OTM weeklies because they are cheap — they need a big, fast move and usually expire worthless — use them rarely, if ever, and size them as money you expect to lose.
  • Mixing up put moneyness — a put is ITM when the stock is below the strike, not above — say the rule out loud before you click.
  • Choosing expiration by price instead of plan — a cheap contract that dies before your setup finishes is not cheap — match expiration to your expected holding time plus a buffer.
  • Ignoring the expiration date on the ticket — similar-looking contracts can expire weeks apart — confirm the date on every order.

Checklist

  • Can I say whether my option is ITM, ATM or OTM?
  • Do I know how far the stock must move to reach my breakeven?
  • Does the expiration give my stock setup enough time, plus a buffer?
  • Am I avoiding a far-OTM weekly bought only because it is cheap?
  • Have I confirmed the exact expiration date on the order?

Practice: Moneyness sorting drill

  1. Open the options chain for QQQ in Paper Sim and note the current price.
  2. List three calls and three puts: one ITM, one ATM and one OTM of each type.
  3. For each, write the premium, the dollar cost per contract and the breakeven at expiration.
  4. Compare the same ATM strike across a weekly, a 30-day and a 60-day expiration and note the cost per day of each.
  5. Record which expiration fits a setup you expect to take two weeks, and why, in your Trade Journal.

Key takeaways

  • Calls are ITM when the stock is above the strike; puts are ITM when the stock is below the strike.
  • ITM options cost more because they contain built-in value; OTM options are cheaper but need a bigger move.
  • More time costs more in total but less per day, and gives the setup room to work.
  • Choose the expiration from your stock plan's expected timeline plus a buffer, not from the cheapest price.

Glossary

  • Strike price — The fixed price at which the option lets you buy (call) or sell (put) the stock.
  • Moneyness — Where the strike sits relative to the stock price: in, at or out of the money.
  • Weekly option — A short-dated contract that expires within the week, highly sensitive to time decay.
  • LEAPS — Long-dated options, typically with a year or more until expiration.

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