ITM, ATM, OTM Options — What Each Means

If you've ever opened an option chain on Zerodha, Dhan, or your broker app, you've seen strikes stretching above and below the current Nifty or stock price. Some are highlighted, some are coloured, some have higher premiums than others. That whole layout is built around one idea — moneyness.

Get this concept right, and the option chain stops looking like a wall of numbers. It starts looking like a menu, with each strike telling you exactly what kind of bet you're placing.

Forget the Jargon — Think of a Coupon

Before any acronyms, let's build the intuition with something everyone in India already understands — a petrol coupon.

Imagine someone hands you a coupon that says: "You can buy 1 litre of petrol at ₹100, valid until next Thursday." The current price at the pump is ₹110.

Would you use that coupon today? Of course — you'd save ₹10 instantly. The coupon has real, usable value right now. In options language, that coupon is in the money.

Now imagine a different coupon: "Buy 1 litre at ₹110." The pump is also at ₹110. The coupon doesn't hurt, but it doesn't help either. It's exactly at the money.

And a third coupon: "Buy 1 litre at ₹120." Pump is at ₹110. Would you ever use this coupon today? No — you'd just go straight to the pump. The coupon is currently useless. It's out of the money.

That's the entire idea behind moneyness. An option is just a coupon — a contract that gives you the right (not the obligation) to buy or sell at a fixed strike price. Where the market sits relative to that strike is everything.

The Moneyness Ruler

Here's the same idea applied to a real Nifty example. Imagine Nifty is currently trading at 25,000. Strike prices are listed every 50 points — 24,800, 24,900, 25,000, 25,100, 25,200, and so on.

For a Call option (a "right to buy" contract), the moneyness map looks like this:

Notice how the zones split cleanly around the current spot price. Strikes below spot are ITM Calls (you'd happily exercise your right to buy below market). The strike at spot is ATM. Strikes above spot are OTM Calls (no one would exercise a right to buy above market — yet).

Puts Flip the Direction

Calls give you the right to buy. Puts give you the right to sell. And because of that one difference, the whole ruler flips.

Go back to the petrol example. Suppose instead of a "buy" coupon, you have a "sell" coupon — "You can sell 1 litre of petrol at ₹120, valid until Thursday." The pump is at ₹110.

Would you use it? Yes — you'd happily sell at ₹120 when the going rate is ₹110. That coupon is in the money — except this time, because of the higher strike. The exact opposite of a Call.

Same Nifty, same strikes, totally different map. Here's the simplest rule to never forget which way is which:

Memorise that one sentence and you'll never confuse the two again. Everything else flows from it.

Inside an Option Chain

Now let's look at what this all becomes on a real broker screen. Most option chains list Calls on the left, the strike price in the middle, and Puts on the right. Same Nifty at 25,000 — here's what a clean version would look like:

Three things to notice the moment you look at this:

One — premiums shrink as you move into OTM territory. A 24,800 Call costs ₹315; a 25,200 Call costs ₹78. The further OTM, the cheaper the option. That's why beginners are drawn to OTM — they're affordable. It's also why most beginners lose money on options. Cheap doesn't mean good odds.

Two — at the ATM strike (25,000), Call and Put premiums are almost identical. ₹165 vs ₹160. That's no accident — both options have zero built-in value at ATM, so they're priced purely on time and volatility expectations.

Three — moneyness mirrors across the strike. The same 25,200 strike is OTM for Calls but ITM for Puts. Two sides of the same coin.

Every Premium is Two Things

Once you can read moneyness, the next question that always comes up is: why does the price look the way it does?

The answer is built into one of the most useful formulas in options:

Look at our 24,800 Call priced at ₹315. With Nifty at 25,000:

The intrinsic value is 25,000 − 24,800 = ₹200. That's the part you'd capture by exercising it right now. The remaining ₹115 is time value — what the market thinks the option might be worth as Nifty keeps moving.

Now look at the 25,200 Call priced at ₹78. Nifty is below the strike, so there's no intrinsic value at all. Every paisa of that ₹78 is pure time value. You're not buying any built-in worth — you're buying hope, plus a deadline.

This is the single most important insight from the whole article. When you buy an OTM option, the entire premium has to be earned by a favourable move before expiry. If the market doesn't move enough, the premium decays toward zero. That's the math behind every "cheap option that expired worthless" story.

Which Strike Should a Beginner Pick?

This is where most articles end with "it depends." That's not very useful. Here's a cleaner way to think about it.

If you're directionally confident — you genuinely believe Nifty is going up over the next few sessions — your strike choice trades cost against safety.

For beginners, the practical guidance is: start with ATM or slightly ITM. These behave more predictably than far-OTM strikes, so you learn how options actually move in real time — without the trap of paying low premiums for an option that needs a miracle to print. They still carry risk; the premium can still be lost if the move doesn't come.

Deep OTM strikes are not "bad" — they have legitimate uses in strategies, hedges, and event-driven plays. But buying them as your first lottery ticket is the most common way new option traders donate to the market.

Frequently Asked Questions