Options Education
What Is Theta Decay in Options Trading?
Educational content only. Not personalized financial advice or a trade recommendation.
Why time matters
Theta describes the theoretical sensitivity of an option’s value to the passage of time, with other inputs held constant.
Theta is not a fixed daily charge
Time decay changes as expiration approaches and interacts with volatility, price movement and other variables.
Compare expiration choices
Shorter-dated contracts can be especially sensitive to time decay. Evaluate the tradeoff between premium cost and time available for a thesis to develop.
Use theta as one input
Review delta, implied volatility, spreads and the underlying market thesis rather than making a decision from theta alone.