ITM, ATM and OTM Options Explained: A Beginner's Guide

What Do ITM, ATM and OTM Mean?

ITM, ATM and OTM describe an option's moneyness — the relationship between the underlying price and the option's strike price.

The three categories are:

Understanding moneyness is essential because it affects an option's premium, intrinsic value, time value and behaviour as expiry approaches.

What Is an ATM Option?

An ATM, or At the Money, option has a strike price very close to the current price of the underlying.

Suppose NIFTY is trading around 25,000.

The 25,000 Call and 25,000 Put would generally be considered ATM, subject to the available strike intervals and exact market price.

ATM options often contain substantial time value and can be highly sensitive to movements in the underlying.

What Is an ITM Call Option?

A Call is ITM when the underlying price is above the strike price.

If NIFTY is at 25,000, a 24,800 Call is ITM.

Its intrinsic value is:

25,000 - 24,800 = 200 points

The market premium can be higher than the intrinsic value because it can also contain time value.

What Is an OTM Call Option?

A Call is OTM when the underlying price is below the strike price.

If NIFTY is at 25,000, a 25,300 Call is OTM.

It currently has no intrinsic value because buying at 25,300 is less attractive than the underlying price of 25,000.

Its premium therefore consists primarily of time value.

What Is an ITM Put Option?

A Put is ITM when the underlying price is below the strike price.

Suppose SENSEX is trading at 81,000.

An 81,500 Put is ITM because it gives the holder the right to sell at 81,500 while the underlying is at 81,000.

Its intrinsic value is:

81,500 - 81,000 = 500 points

The premium can still be greater than this amount because of time value.

What Is an OTM Put Option?

A Put is OTM when the underlying price is above the strike price.

If SENSEX is at 81,000, an 80,500 Put is OTM.

It has no intrinsic value at that moment.

Its premium is therefore primarily time value.

Simple NIFTY Example

Suppose NIFTY is trading at 25,000.

For Calls:

For Puts:

For Calls, strikes below the underlying are generally ITM.

For Puts, strikes above the underlying are generally ITM.

Why Does Moneyness Matter?

ITM options generally contain intrinsic value.

ATM options often contain significant time value and can have high sensitivity to the underlying.

OTM options have no intrinsic value, so their premium is entirely time value.

As expiry approaches, the time value of OTM options can decline rapidly if the underlying does not move sufficiently.

ITM, ATM and OTM for Option Buyers

ITM options generally cost more because they contain intrinsic value.

OTM options are usually cheaper, but a lower premium does not mean lower risk.

A far OTM option may require a large underlying move before expiry to become valuable enough to overcome the premium paid.

ATM options often sit between these extremes.

ITM, ATM and OTM for Option Sellers

ITM options generally have higher premiums because they contain intrinsic value.

OTM options may offer smaller premiums but can still become expensive if the underlying makes a sharp move.

Strike selection should therefore consider the strategy, risk, time to expiry, volatility and expected market behaviour.

Moneyness Can Change

Moneyness is not permanent.

Suppose NIFTY is at 25,000 and a 25,200 Call is OTM.

If NIFTY rises to 25,300, the same 25,200 Call becomes ITM.

This is why option chains must be evaluated dynamically as the underlying moves.

Common Beginner Mistakes

Mistake 1: Assuming OTM Means Safe

An OTM option may have a small premium, but the underlying may need to make a large move before expiry.

Mistake 2: Assuming ITM Is Always Better

ITM options have intrinsic value but also require a larger initial premium.

Mistake 3: Ignoring Time to Expiry

An OTM option with little time remaining can lose its time value quickly.

Mistake 4: Looking Only at Premium

Premium alone does not determine whether an option is attractive. Strike, expiry, volatility and Greeks also matter.

Final Takeaway

ITM, ATM and OTM describe the relationship between an option's strike price and the underlying price.

For Calls:

For Puts:

Understanding moneyness is a fundamental skill for anyone trading NIFTY or SENSEX options.

Disclaimer

This article is for educational purposes only and does not constitute financial advice. Please consult a SEBI registered investment advisor before making any investment decisions.