Premium

In the context of options trading, the premium is the price paid by the option buyer to the option seller (writer) for acquiring the right to buy (call) or sell (put) the underlying asset at the strike price before or at expiry. The premium represents the total cost of the option to the buyer and the total income received by the seller — it is quoted per unit of the underlying and multiplied by the lot size to calculate the total premium outlay. Option premiums have two components: intrinsic value (the immediate exercise value — the amount by which the option is in the money) and time value (the additional premium above intrinsic value, reflecting the probability of further favourable price movement before expiry). The premium is influenced by the underlying asset price, strike price, time to expiry, implied volatility (the most impactful variable), risk-free interest rate, and expected dividends — quantified through the options Greeks (Delta, Gamma, Theta, Vega, Rho). In Indian F&O markets, Nifty 50 and Bank Nifty option premiums fluctuate rapidly in response to market moves, volatility changes, and time decay — particularly in the final days and hours before expiry, when time value collapses rapidly. For options buyers, premium decay (theta) is the primary risk — even correct directional calls can result in losses if the move comes too slowly and time value erodes. For sellers, collected premium is their maximum profit, while risk is theoretically unlimited for naked call sellers.