Strike Price in Option Trading: Meaning & Examples
26 Aug 2026
2 mins read
Strike price is among the key terms in options trading, and it is very important for traders to know what it is. The strike price is the price at which a buyer of an option can purchase or sell the underlying asset in case the option is exercised. Whether the trades are on put options or call options, the strike price remains relevant for determining how valuable the option is, as well as how profitable and risky it is.
It is necessary to choose the strike price correctly. Among various factors affecting proper strike price selection are market expectations, objectives, and risk tolerance. In this article, we will explain the strike price concept in options trading, its different types, examples, and factors affecting the choice of the strike price.
What is Strike Price in Option Trading?
The strike price or exercise price is the set price at which an options contract gives the buyer the right to buy or sell the underlying asset before or on expiry.
- With a Call Option, the buyer has the right to buy the underlying asset at the strike price.
- With a Put Option, the buyer has the right to sell the underlying asset at the strike price.
The strike price does not change during the life of the options contract, irrespective of any changes that may occur in market prices.
Table of Contents
Why is Strike Price Important?
The strike price plays a significant role in affecting the profitability of an option.
Sets Profitability
The intrinsic value of an option price is calculated on the basis of the market price and the strike price.
Impacts the Option Premium
Options having a strike price very close to the current market price often demonstrate premium value quite different from that in the case of distant strike prices.
Assists in the Choice of Trading Strategies
The selection of a certain strike price depends on the trader's market outlook and strategy.
Specifies Risk and Reward
The strike price directly affects the possible earnings and losses from this options position.
Types of Strike Prices
Strike prices are usually classified depending on their position in relation to the market price of the underlying asset.
At-the-Money (ATM)
The strike price coincides with the market price of the underlying construction.
In-the-Money (ITM)
Call options with a strike price that is lower than the market price of the issue represent a profitable position for the seller.
Put options with a strike price greater than the market price of the underlying construction are said to be in-the-money.
Out-of-the-Money (OTM)
Call options with a strike price that is higher than the market price are out-of-the-money.
Put options where the strike price is lower than the market price are considered out-of-the-money as well.
These types of classifications allow traders to analyze the probability of making money on an option before its expiration moment.
Example of Strike Price
Let us assume that the stock shares of Company ABC are being traded at ₹500 at the moment.
An investor buys a Call Option with
Strike Price – ₹520
Premium – ₹12 per share
Situation 1
In a situation where the market price goes up to ₹550, the option has intrinsic value as the market price is above the strike price.
Situation 2
In another situation where the market price remains below ₹520, the option will become worthless and the investor will lose the amount paid for the option.
This simple illustration shows how the market price and strike price of an option affect its value.
Factors Affecting Strike Price Selection
The decision regarding the strike price is affected by many factors, including:
Market Outlook
The choice of strike price depends on whether the trader is bullish, bearish, or neutral.
Volatility
High volatility in the market may lead to the use of different strike prices and option strategies.
Time to Expiry
The time remaining before the expiry of the option may also play a role in deciding on the strike price.
Risk Appetite
Traders who are cautious may prefer a different strike price than those who take a more aggressive stance.
Premium Cost
The price of the premium that the trader has to pay may influence the strike price selection.
Strike Price vs Market Price
Basis | Strike Price | Market Price |
| Meaning | Predetermined exercise price | Current trading price of the underlying asset |
| Fixed or Variable | Fixed for the option contract | Changes continuously |
| Purpose | Determines exercise value | Reflects current market conditions |
| Changes During Contract | No | Yes |
| Impact | Determines option payoff | Influences option premium |
How Strike Price Affects Option Value
The strike price has a direct impact on an option's premium and intrinsic value.
High Intrinsic Value
Options that are already in-the-money will have intrinsic value.
Changes in Premium
The difference in strike price and market price will affect the premium.
Fear of Profitability
Pricing options which are close to market price could be interpret differently that those further away from the market price, because of potential risk and earnings.
Time Value
The strike price will play a role in the calculation of the total option premium by working with time left to expiration.
To learn more about this relationship, please check out our guide on Intrinsic Value and Time Value of Options
Factors to Consider While Selecting Strike Price
Choosing the right strike price is related to your approach to selling options.
- Know your market outlook prior to choosing the strike price.
- Before entering a trade, check out the different options available with varying strike prices.
- Think about implied volatility and the time left until the options expire.
- Examine the cost of the options premium and the potential profit.
- Apply good techniques of risk management to avoid losses.
Conclusion
The strike price in option trading is a crucial component of the options agreement. It indicates what price the purchase option will open at. The strike price affects the option's price and will thus determine the opportunities and the expenses incurred in making certain transactions. Therefore, the trader gains knowledge concerning the strike price in accordance to the market price of the options trading and obtains intrinsic value, thus understanding the options prices. Additionally, the selection of strike price is influenced by many external factors.
FAQs on Strike Price In Option Trading
What is strike price in option trading?
In option trading, the strike price refers to the guaranteed price at which the buyer can either purchase or sell the underlying asset prior to or at the time of expiration.
What is the difference between strike price and market price?
The strike price does not change during the duration of the option contract; on the other hand, the market price fluctuates continuously according to the respective forces of demand and supply.
How does strike price affect option premium?
There is a significant correlation between the strike price and the market price which influences the intrinsic value and premium of the option.
Can the strike price change after buying an option?
The strike price does not change after an option contract is executed, it remains constant until the expiration date.
