Every price quoted on the National Stock Exchange (NSE) option chain is governed by mathematical sensitivities known as Option Greeks—Delta, Gamma, Theta, and Vega.

Delta (Δ) & Directional Exposure

Delta measures the expected price change in an option for every 1-point change in the underlying spot price. ATM options feature Deltas near ±0.50.

Theta (Θ) & Time Decay

Theta measures the daily rate of option premium erosion. Institutional option sellers leverage heavy OI defense zones to capture consistent time decay.