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Not investment advice. Educational reading. See Disclaimer.
L.3 · BEGINNER · 3 MIN

Moneyness, and Reading Delta as Probability

Moneyness describes an option’s relationship to the current stock price. It determines whether an option has intrinsic value right now — and profoundly affects its price, Greeks, and behavior.

Quiz · 5 questions ↓

Live data

AAPL — Current Price. Open AAPL on the Ledge to see current values.

Compare

MoneynessCall Example (Stock at $150)Put Example (Stock at $150)Has Intrinsic Value?
In-the-Money (ITM)Strike $145 ($5 intrinsic)Strike $155 ($5 intrinsic)Yes
At-the-Money (ATM)Strike $150Strike $150No (just time value)
Out-of-the-Money (OTM)Strike $155Strike $145No

Key point

ATM options have the most time value and the highest theta decay. OTM options are cheaper but more likely to expire worthless. ITM options behave more like the stock itself.

Formula

Call Intrinsic Value = max(Stock Price − Strike, 0)

Try it

Look at an options chain for any stock. Identify which strikes are ITM, ATM, and OTM. Notice how premiums decrease as you move further OTM.

Check-in

A $100 call costs $12 when the stock is at $108. How much is intrinsic value vs. time value?

Key insight

Time value is what you pay for the POSSIBILITY that the option becomes more valuable. It decays to zero at expiration. Intrinsic value is what the option is ACTUALLY worth right now.

Check-in

AAPL at $200. Call strike $210 = OUT of the money (OTM). Call strike $195 = IN the money (ITM). Time value at expiry?

Key insight

Delta does double duty. Besides measuring how much the option moves per $1 in the stock, delta also roughly approximates the probability that the option finishes in-the-money: a 0.30-delta call has about a 30% chance of finishing with intrinsic value, a 0.70-delta call about 70%. Read delta as the odds, then ask whether the premium makes sense given those odds. (It is a risk-neutral rule of thumb, not a guarantee — real-world odds differ — but it is the single most useful intuition for picking a strike.)

Key point

Cheap is not the same as good. Far-OTM options feel attractive because they cost almost nothing — but the low odds of paying off are built directly into that low price. A $0.30 "lottery ticket" on a 10-delta strike pays out maybe one time in ten; ladder ten of them and one $5 winner just about matches what the model expected. Beginners systematically misread a cheap premium as 'a good deal' when it is really the market quoting the long odds back at them.

Check your understanding

Sit with the ideas.

Stock XYZ trades at $80. Which of the following put options is in the money?

Why:
Continue this lesson in the appAdaptive practice · saves your progress · remediation when you miss
Try this in paper trading

Buy 100 shares of a covered-call candidate

Pick a stock you'd be comfortable selling at 10% above today's price. Paper-buy 100 shares (a standard options contract size). Journal what strike + expiration you'd write a covered call at, even though we're not paper-trading options at v1.

Open paper portfolio →

Practice mode — simulated trades, not investment advice.

Other lessons in this course.

  1. 01Calls and Puts: The Building Blocks
  2. 02Options P&L: Calculating Profit and Breakeven
  3. 03Moneyness, and Reading Delta as Probability— reading now
  4. 04The Four Greeks: Delta, Theta, Gamma, and Vega
  5. 05Implied Volatility: The Options Market's Forecast
  6. 06Covered Calls, Cash-Secured Puts, and Protective Puts
  7. 07Intrinsic vs Time Value: The Two Halves of Every Premium
  8. 08Assignment, Exercise, and the Early-Exercise Surprise
Continue this lesson in the app →See it on a real ticker →