How Does the Time Decay (‘theta’) Affect Option Prices?

Theta is the measure of an option's sensitivity to the passage of time. It is almost always a negative value, representing the daily decrease in an option's extrinsic (time) value as it approaches expiration.

Theta decay accelerates significantly as the option gets closer to its expiration date.

How Does the Time until Expiration Affect the Extrinsic Value of an Option?
Explain Why Theta Accelerates near the Option’s Expiration Date
Explain the Difference between American and European Style Options.
Explain the Concept of “Theta Decay” and Its Impact on Option Value
How Does the ‘Time Value’ of an Option Decay as Expiration Approaches?
What Is the Concept of ‘Time Decay’ (Theta) in Option Pricing?
What Is “Time Decay” (Theta) and How Does It Affect the Premium?
How Does Theta Affect the Value of an Option as It Approaches Expiration?