Options Greeks explained: A trader's guide to all five

In the options market, five factors known as "Greeks" help traders understand how an option's value might change due to various inputs. These Greeks are delta, gamma, theta, vega, and rho. Delta measures how much an option's premium moves for a $1 change in the underlying stock price. Gamma indicates how fast delta itself changes.

Theta shows the daily erosion of an option's value, assuming other factors stay constant. Vega estimates the impact of a 1 percentage point change in implied volatility on the option's premium. Rho, though less common, tracks how interest rates affect the option's price. An example is given using Nvidia (NVDA) stock, where a trader examines a $215 call option expiring in 29 days.

The Greeks for this contract are 0.53 delta, 0.0147 gamma, -0.15 theta, 0.40 vega, and 0.02 rho. These numbers help traders assess the option's potential movement based on changes in stock price, time, volatility, and interest rates.