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What Does a High Theta Value Imply for an Option’s Value?

Theta measures the rate at which an option's value decays as the time to expiration decreases. A high negative Theta value implies that the option is losing a significant portion of its value each day due0 to time decay.

This effect is most pronounced for at-the-money options close to expiration.

How Can a Trader Benefit from a Negative Theta Position?
What Is “Theta” and How Does It Measure Time decay’S Effect on an Option’s Value?
How Does the Theta of a Put Option Affect Its Value over Time?
How Does Theta (Time Decay) Interact with Gamma as Expiration Approaches?