Theta — A Beginner's Definition

A learner's definition of theta — the option Greek that measures time-value decay, with the deep math reserved for risk./.

Placeholder content. Full editorial copy publishes in a later phase. The page index entry is the canonical brief.

Page type: Glossary Target keyword: theta beginner definition Intent: Informational Suggested CTA: C1 Related internal links: /greeks-explained-for-0dte → risk./theta-decay-explained