Thetaθ
西塔
Sentiment & DerivativesP2OptionsApplies to: US stocks
Definition
Time decay of an option's value.
Formula
∂option price/∂time (usually negative)
How to read it
Decays fastest near expiry/at-the-money; sellers collect Theta, buyers pay Theta.
Outputvalue/series
Data source: Same as above. Public knowledge, not investment advice.
See Theta computed live on popular US stocks →
Related indicators
Reference metadata — public, well-known indicator definitions. Not investment advice.