Targeting Theta in Your Options Trading? Consider These 3 Strategies

Negative theta in options, Option Greeks: 4 Factors for Measuring Risks

Updated Dec 28, What Is Theta?

Short Put Option Positive Theta is an estimate of how much an option would decrease per day from time decay when there is no outside movement or volatility in the underlying futures contract. Long puts and calls always have negative time decay, and short puts and calls have positive time decay. The higher the theta is on an option — priced between -1 and 0 for long options and 0 and 1 for short options — the more value will come out of the option per day when all else is constant. At the money options tend to have higher thetas and are more susceptible to time decay as expiration approaches. The thetas are progressively lower for options as you get away from the strike price at the money.

The term theta refers to negative theta in options rate of decline in the value of an option due to the passage of time. It can also be referred to as the time decay of an option.

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This means an option loses value as time moves closer to its maturityas long as everything is held constant. Theta is generally expressed as a negative number and can be thought of as the amount by which an option's value declines every day. Key Takeaways Theta refers to the rate of decline in the value of an option over time. If all other variables are constant, an option will lose value as time draws closer to its maturity.

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Theta, usually expressed as a negative number, indicates how much the option's value will decline every day up to maturity. The strike price, which is also called an exercise priceis set when the contract is first written, informing the investor of the price at which the underlying asset must reach before the option can be exercised.

This is known as time decay or the erosion of the value of an option as time passes.

Delta, Gamma, Theta, Vega - Options Pricing - Options Mechanics

An option's profitability decreases as time goes on. But what happens when two options are similar but one expires over a longer period of time? The value of the longer-term option is higher since there is a greater chance or more time that the option could move beyond the strike price.

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Because theta represents the risk of time and the loss of value of an option, it is always expressed as a negative figure. The value of the option diminishes as time passes until the expiration date.

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Since theta is always negative for long options, there will always be a zero time value when the option expires. This is why theta is a good thing for sellers but not for negative theta in options decreases from the buyer's side as time goes by, but increases for the seller. That's why selling an option is also known as a positive theta trade—as theta accelerates, the seller's earnings on their options increase.

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Option writers benefit from time decay because the options written become less valuable as the time to expiration approaches. Consequently, it is cheaper for option writers to buy back the options to close out the short position. Put a different way, option values are, if applicable, composed of both extrinsic and intrinsic value.

Theta Time Decay – Key Points About Selling Options Part 8

At option expiration, all that remains is intrinsic value, if any, because time is a significant part of the extrinsic value. Theta vs. Drawn from the Greek alphabet, theta has numerous meanings across different fields—in economics, it also refers to the reserve ratio of banks in economic models. This is unfavorable to the option holder. Compare Accounts.