# Strike Price

> The strike price is the fixed price at which an option can be exercised. Learn how strikes affect cost, probability and payoff, and how traders choose them.

Source: https://learn.tradelabsai.com/options/strike-price/  
Track: Options · Level: Intermediate · Updated: 2026-10-03  
Publisher: TradeLabs AI (https://tradelabsai.com). Education, not financial advice.  
Cite as: TradeLabs Learn, "Strike Price", https://learn.tradelabsai.com/options/strike-price/

The strike price, also called the exercise price, is the fixed price at which an option holder can buy (with a call) or sell (with a put) the underlying asset. It is the single most important choice when picking an option, because it decides how much the option costs, how likely it is to pay off and how much it can make. Options on the same underlying and expiry are listed at many strikes, and each behaves differently.

## How strikes are listed

Exchanges list strikes at set intervals around the current price, for example every $1, $2.50 or $5 for stocks, depending on the price and how actively the options trade. Heavily traded underlyings, such as major index ETFs, may have strikes every $1 across a wide range. New strikes are added as the price moves.

## Strike and moneyness

Where the strike sits relative to the current price determines whether an option has intrinsic value. See [Moneyness: ITM, ATM and OTM](https://learn.tradelabsai.com/options/moneyness-itm-atm-and-otm/).

| Stock at $100 | Call | Put |
|---|---|---|
| $90 strike | In the money ($10 intrinsic) | Out of the money |
| $100 strike | At the money | At the money |
| $110 strike | Out of the money | In the money ($10 intrinsic) |

## How the strike changes the trade

**Example: Three call strikes, one view**
A stock trades at $100 and you expect a rise over the next month. One month calls are priced:

| Strike | Premium | Cost per contract | Break even | Profit if stock goes to $110 |
|---|---|---|---|---|
| $95 (in the money) | $7.00 | $700 | $102 | $800 ($1,500 minus $700) |
| $100 (at the money) | $3.50 | $350 | $103.50 | $650 ($1,000 minus $350) |
| $105 (out of the money) | $1.50 | $150 | $106.50 | $350 ($500 minus $150) |

If the stock ends at $104: the $95 call earns $200, the $100 call earns $50 and the $105 call loses $150. If it ends at $120: the $105 call makes the highest return on cost, $1,350 on $150 (900%), compared with $1,800 on $700 (257%) for the $95 call.

The pattern: lower strike calls cost more but need less movement to profit; higher strike calls are cheaper with bigger percentage payoffs, but the stock must move further.

## Strike and probability

A rough guide to the market's view of the chance an option finishes in the money is its [Delta](https://learn.tradelabsai.com/options/delta/). An at the money option has a delta near 0.50, roughly a coin flip. A far out of the money option with a delta of 0.10 has roughly a 10% chance of finishing in the money, by that rough measure. Cheap options are cheap for a reason.

## Choosing a strike

| Goal | Typical strike choice |
|---|---|
| Behave like the stock, less time decay | In the money (delta 0.70 or more) |
| Balanced cost and sensitivity | At the money |
| Cheap lottery style payoff on a big move | Out of the money |
| Hedging a portfolio cheaply | Out of the money puts. See [Protective Put](https://learn.tradelabsai.com/options/protective-put/) |
| Selling premium with a buffer | Out of the money calls or puts. See [Covered Call](https://learn.tradelabsai.com/options/covered-call/) |

Also consider:

- **Your price target:** where do you expect the underlying to be, and by when?
- **Liquidity:** strikes near the money usually have the tightest spreads.
- **Volatility skew:** strikes can carry different implied volatilities. See [Volatility Smile and Skew](https://learn.tradelabsai.com/volatility/volatility-smile-and-skew/).

## Strikes in spreads

Multi leg strategies use more than one strike. A bull call spread buys one strike and sells a higher one, capping both cost and profit. The distance between strikes sets the maximum gain or loss. See [Vertical Spreads](https://learn.tradelabsai.com/options/vertical-spreads/).

## Common mistakes

- **Always buying the cheapest out of the money options,** which rarely pay off.
- **Ignoring break even:** a call is not profitable at expiration just because the stock is above the strike.
- **Trading illiquid strikes** with wide spreads.
- **Choosing a strike without a price target and timeframe.**

## Frequently asked questions

### What is a strike price in options?

The fixed price at which the option holder can buy (call) or sell (put) the underlying asset.

### Which strike price should I choose?

It depends on your target, timeframe and risk. In the money options cost more but need less movement; out of the money options are cheaper but less likely to pay off.

### Can the strike price change?

Normally no. Strikes can be adjusted for corporate actions such as stock splits or special dividends, so that the contract keeps its value.

Next, learn what goes into an option's price in [Option Premium](https://learn.tradelabsai.com/options/option-premium/).

## Continue learning

- Next lesson: [Option Premium](https://learn.tradelabsai.com/options/option-premium/)
- Previous lesson: [Calls and Puts](https://learn.tradelabsai.com/options/calls-and-puts/)
- Related: [Calls and Puts](https://learn.tradelabsai.com/options/calls-and-puts/): A call gives the right to buy and a put gives the right to sell at a set price. Learn how calls and puts work, how they profit and how buyers and sellers differ.
- Related: [Moneyness: ITM, ATM and OTM](https://learn.tradelabsai.com/options/moneyness-itm-atm-and-otm/): Moneyness describes where an option's strike sits relative to the underlying price. Learn ITM, ATM and OTM for calls and puts, and how each behaves.
- Related: [Option Premium](https://learn.tradelabsai.com/options/option-premium/): The option premium is the price paid for an option. Learn what drives it, including price, strike, time, volatility, rates and dividends, with worked examples.
- Related: [Delta](https://learn.tradelabsai.com/options/delta/): Delta measures how much an option's price moves for a $1 move in the underlying. Learn delta for calls and puts, delta as a hedge ratio and as a rough probability.
- Related: [Intrinsic and Extrinsic Value](https://learn.tradelabsai.com/options/intrinsic-and-extrinsic-value/): An option's price splits into intrinsic value and extrinsic or time value. Learn how to calculate each, what drives extrinsic value and why it decays to zero.
- Related: [Option Payoff Diagrams](https://learn.tradelabsai.com/options/option-payoff-diagrams/): Payoff diagrams show an option position's profit or loss at expiration across prices. Learn to read and draw them for single options and multi leg strategies.