ApexVol
Greeks

Theta

Daily time decay value

What is Theta?

Theta The rate at which an option loses value each day from time decay. All else equal, options lose theta daily. Sellers benefit from theta; buyers fight it.

Complete Definition

The rate at which an option loses value each day from time decay. All else equal, options lose theta daily. Sellers benefit from theta; buyers fight it.

Example

Theta of -0.05 means the option loses $5 per day (per contract) from time decay alone.

Want to Learn More?

Explore our educational resources and analytics tools to deepen your understanding.