What is a Strike Price? A Simple Guide for Indian Traders

The strike price, also called the exercise price, is the fixed price at which an option can be used. For a call it is the price you can buy at; for a put it is the price you can sell at. It is set when the contract is created and never changes during its life.

Every option has a strike price at its heart. It is the anchor around which the whole contract works.

Choosing the right strike is one of the most important decisions in options trading. Here is how it works, why it matters, and what to watch for. You can view all strikes in the option chain on Stockk.

Key Takeaways

• The strike is the fixed price at which an option can be exercised.
• For a call it is the buy price; for a put it is the sell price.
• The strike never changes during the contract.
• Strike choice decides whether an option is ITM, ATM or OTM.
• Lower-strike calls cost more; higher-strike calls cost less.

What does the strike price do?

For example, NIFTY trades at 22,600. The exchange lists options at many strikes, such as 22,400, 22,500, 22,600 and so on. A 22,700 call lets the buyer buy NIFTY at 22,700, no matter how high the index actually goes. That fixed level is the strike.

The strike is set when the contract is created and stays the same through normal trading. Only the premium changes as the price and time move. The one exception is a corporate action in the underlying stock, such as a split, a bonus issue or a special dividend, where the exchange adjusts the strike and lot size so that the contract keeps its original economic value.

Why does strike selection matter?

The strike decides how an option behaves. It sets the moneyness, the premium, the risk and the chance of profit.

How to think about choosing a strike

There is no single right strike. The choice is a trade-off between cost, probability and reward. A simple way to think about it:

• In-the-money strike: higher cost, higher chance, behaves like the stock
• At-the-money strike: balanced cost and chance, most sensitive to moves
• Out-of-money strike: lowest cost, lower chance, needs a bigger move

A trader expecting a small, probable move might pick an in-the-money or at-the-money strike. A trader betting on a large but less probable move might pick a cheaper out-of-money strike, accepting a lower probability of finishing in the money in exchange for a bigger payoff if it does.

Strike selection example

NIFTY at 22,600

Strike vs spot price

Do not confuse the strike with the spot price. The strike is the fixed level written into the contract. The spot is the live market price, which moves constantly. The relationship between them decides whether the option is in, at or out of the money.

When you are ready to trade options, Stockk has you covered. Create a demat account in minutes and lean on the Knowledge Center as you build confidence.

Futures and Options are leveraged products and carry a high risk of loss that can be more than the money you put in. This article is only for learning and is not a recommendation to trade in derivatives.

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