Option Premium

In one line: The premium is the price an option buyer pays the seller — it is made up of intrinsic value plus time (extrinsic) value, and it is what you risk as a buyer and collect as a seller.

In simple words

The premium is what an option costs. When you buy a Nifty call for ₹150, that ₹150 (times the lot size) is your premium and your maximum loss. The premium has two parts: intrinsic value (the in-the-money amount, if any) and time value (everything else — the price of possibility). Sellers receive the premium and want it to decay to zero.

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The two components of premium

Every option premium splits into intrinsic value and extrinsic (time) value. Intrinsic value is how far in-the-money the option is — a 20,000 call with Nifty at 20,150 has ₹150 of intrinsic value. Extrinsic value is everything above that, representing time until expiry and implied volatility. An out-of-the-money option has zero intrinsic value, so its entire premium is time value — which is why it can decay to nothing.

What drives the premium

Five forces move an option's premium, captured by the Greeks: the underlying's price (Delta), the speed of that effect (Gamma), time to expiry (Theta), implied volatility (Vega) and interest rates (Rho). The biggest drivers for most Indian traders are direction, time and volatility. A premium can rise even when the underlying is flat if implied volatility jumps — and fall even when the underlying moves your way if volatility collapses (IV crush).

Premium as risk and as income

For a buyer, the premium is the complete, defined risk — you cannot lose more than you pay. For a seller, the premium is income received upfront, kept in full if the option expires worthless. This mirror relationship is the heart of options: buyers pay for limited-risk, leveraged possibility; sellers earn premium for taking on obligation. Understanding premium as both risk and income clarifies which side of a trade you truly want to be on.

Reading premiums in the option chain

The option chain lists live premiums for every strike and expiry. Comparing them reveals the market's expectations: the difference between adjacent strikes' premiums approximates Delta, the size of time value signals implied volatility, and rich premiums before an event reveal anticipated movement. Learning to read premiums across the chain — rather than looking at one option in isolation — is a core skill for both buyers and sellers.

Practical example (Nifty)

Why it matters in practice

• The premium is a buyer's maximum loss and a seller's maximum profit.
• Premium = intrinsic value + time value; out-of-the-money options are 100% time value.
• Implied volatility can move premiums even when the underlying is flat — beware IV crush around events.
• Reading premiums across the option chain reveals the market's expectations.

Common mistakes

• Paying a rich premium for options before a known event, then losing to IV crush after it.
• Not separating intrinsic from time value, and overpaying for an option that is mostly hope.
• Judging an option 'cheap' by its rupee premium alone, ignoring how far it is out-of-the-money.
• Selling premium that looks large without accounting for the risk that justifies it.

What professionals do

Skilled traders decompose every premium into intrinsic and time value and check where implied volatility sits before paying or collecting it. They avoid buying inflated pre-event premium, prefer to sell premium when volatility is high relative to its history, and read the whole option chain to gauge expectations rather than fixating on a single quote. To them, a premium is not just a price — it is a statement of the market's probabilities.

Frequently Asked Questions

Sources & references

• NSE India — Option chain
• Zerodha Varsity

Educational content only — not investment advice.