What is an Option Premium? A Simple Guide for Indian Traders
The premium is the price a buyer pays to purchase an option, and the income a seller receives for taking on the obligation. It is quoted per unit and is the buyer's maximum possible loss. The premium is made of intrinsic value plus time value.
When you buy an option, the amount you pay is called the premium. It is the single most important number in any option trade.
The premium is also the most a buyer can lose, which makes it easy to manage risk. The sections below explain it step by step, without the jargon. You can see live premiums in the option chain on Stockk.
Key Takeaways
- The premium is the price paid to buy an option.
- It is the buyer's maximum possible loss.
- Premium equals intrinsic value plus time value.
- It rises with higher volatility and more time to expiry.
- It falls with time decay as expiry nears.
What makes up an option premium?
Consider a case where NIFTY is at 22,600 and the 22,500 call trades at a premium of ₹140. Because the spot is 100 points above the strike, ₹100 of that premium is intrinsic value and the remaining ₹40 is time value. The breakeven is 22,640, which is the strike plus the premium. As expiry nears, that ₹40 of time value decays toward zero, which is the cost the buyer pays for holding the option.
Every premium has two parts:
- Intrinsic value: the real, in-the-money amount of the option
- Time value: the extra amount for the chance it gains value before expiry
An out-of-money option has no intrinsic value, so its whole premium is time value. As expiry nears or volatility falls, that time value shrinks, which is why premiums decay even when the price is flat.
Breaking down a real premium
Take the case where NIFTY is at 22,600 and the 22,500 call trades at a premium of ₹140. We can split this into its two parts:
| Part | Amount | Why |
|---|---|---|
| Intrinsic value | ₹100 | Spot 22,600 minus strike 22,500 |
| Time value | ₹40 | The rest, for the chance of more gains |
| Total premium | ₹140 | What the buyer pays |
As expiry nears, the ₹40 time value shrinks toward zero. If NIFTY stays at 22,600 at expiry, the option is worth only its ₹100 intrinsic value, so the buyer would have lost the ₹40 time value to decay.
What moves the premium?
| Factor | Effect on premium |
|---|---|
| Higher volatility | Premium rises |
| More time to expiry | Premium rises |
| Time passing (decay) | Premium falls |
| Price moving into the money, or deeper in the money | Premium rises |
Who benefits from decay?
Option sellers benefit from time decay, since the premium they collected loses value over time. Buyers are hurt by the same decay. This is the core trade-off between buying and selling options.
You will find options and the full options suite on Stockk. Open your free demat account to get started, and dip into the Knowledge Center for related explainers.
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.
Frequently Asked Questions
Is the premium the same as the strike price?
No. The strike is the fixed exercise price, while the premium is the cost to buy the option. They are different numbers; the premium changes constantly, the strike never does.
Why do premiums decay over time?
Time value erodes as expiry approaches, a process called theta decay. With less time for the option to pay off, its time value shrinks toward zero, leaving only intrinsic value at expiry.
Can a premium be entirely time value?
Yes. An out-of-money option has no intrinsic value, so its whole premium is time value. Such options decay to zero if they stay out of the money.
Who benefits from premium decay?
Option sellers benefit, since the premium they collected loses value over time, while buyers are hurt. This is the core trade-off between buying and selling.
How does volatility affect the premium?
Higher implied volatility raises premiums because larger expected moves make options more valuable, while falling volatility lowers them.
Investments in securities market are subject to market risks. This article is for educational purposes only and does not constitute investment advice.
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