Subgroup of option Greeks.

Includes the Greeks which are first derivatives of option price: delta, theta, vega, rho.

Excludes gamma, which is a second order Greek, and other higher order Greeks.

See Option Greeks Tutorial and how to calculate Greeks in Excel.

## List of First Order Greeks

**Delta** = Measure of sensitivity of option price to small changes in underlying price.
Sometimes also used as proxy for the probability of expiring in the money.

**Rho** = Sensitivity of option price to small changes in interest rate.

**Theta** = Sensitivity of option price to passage of time (small changes in time to expiration). Measure of time decay.

**Vega** = Also kappa. Measures sensitivity of option price to small changes in volatility.