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Is Time Decay Beneficial to the Option Buyer or the Option Seller?

Time decay is generally beneficial to the option seller (writer) and detrimental to the option buyer. The seller collects the premium and profits as the time value erodes to zero by expiration.

The buyer pays the premium and loses money daily due to the decay of the time value.

Which Option Position (Long or Short) Benefits from High Theta Decay?
Does a Drop in Volatility Have the Same Impact on In-the-Money and Out-of-the-Money Options?
Under What Circumstances Would an Early Exercise of an American Option Be Beneficial?
Does Theta Benefit the Buyer or the Seller of an Option?