Theta

Theta The ratio of the change in an option price to the decrease in time to expiration.
Time Decay The ratio of the change in an option price to the decrease in time to expiration.

Theta
A measure of the sensitivity of the price of an option to a change in its time to expiry.
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Theta
Theta is used to measure the time decay and is typically expressed as the loss of time value as the contact nears its expiry. If the value of the theta is at -.1, then it means that the futures contract is losing $.10 per day.

Theta: Paying for Gamma

The daily cost of owning an option is known as its "Time Decay" or Theta. In effect, it is the daily cost of insurance against uncertainty.

Theta
The measure of change to the value of an option with the passing of time.
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Theta
Theta is the measurement of the time decay of an option position. It is the ratio of the change in an option's price to the decrease in the time remaining to the option's expiration.
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Theta
The measurement of the time decay of a position.
Thrust
A comparison between the price difference of successively lower pivot bottoms or higher pivot tops.

Theta
A measure of the rate of decline in the value of an option due to the passage of time. Theta can also be referred to as the time decay on the value of an option.

Theta (T) or time decay. Occurs as the very slow or non-existent movement of the currency triggers losses in the option's theoretical value.

Theta - The measure of the change in an option's premium given a change in the option's time until expiration. Equal to the change in the option's premium divided by the change in time to expiration.

Theta
A measure of the rate of change in an option's theoretical value for a one-unit change in time to the option's expiration date.

Theta - A measurement of the change in the value of an option against time decay.

Theta
Also called time decay, the ratio of the change in an option price to the decrease in time to expiration.
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THETA Measure of change in an option exposure that results from the passage of time.
TIME VALUE Option value associated with the time left to maturity since during the life an option can move in and out of the money.

Theta
The sensitivity of a warrant's value to the passage of time. Theta, (% week) shows the theoretical fall in warrant price in 7 days with all other factors remaining the same.

Theta - One of the 5 option greeks. Theta determines the rate of time decay of an option contract's premium. For more details on how Theta works and how it is calculated, please visit Option Greeks.

Theta: The derivative of the option price equation with respect to the remaining time to expiration of the option. A measure of the sensitivity of the value of the option to the passage of time.

Theta
Describes the change in value of an Option over time . The change in value stems from the reduction in the time to expiration and hence the reduction in the life of the Option.
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Option Theta
The option theta is a greek that is said to be able to measure the affect of time decay on an option contract. It identifies how much value an option will lose for every 1 day that passes.

Theta
The rate at which option loses value as time to maturity decreases. Also referred to as the time decay of an option.
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Theta
(decay) - The sensitivity of an option price to the variable of time to Expiration. Remember that options only have a finite life (until Expiration), ...
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Theta shows the change in the option's price (in points) due to the effect of time alone. The longer the time until expiration, the less effect that time has on the price of the option.

Theta: A measure of how much an option changes value relative to time. If an XYZ option is $2 when XYZ is 34, and tomorrow XYZ is still 34 but the option is now only $1.95, then the theta is .05 since the option decreased in value by a nickel.

The rate of change of Time Value is measured by a Greek symbol call THETA.
Volatility. If a stock is volatile, the option prices will be high; if the stock is not volatile, the option prices will be low. This is another IMPORTANT concept.

theta The ratio of the change in an option's price to the amount of time that has... thin market A market is thin when there are few bids and offers. Such a market condition...

The specific measurement of the option's change in value over time is represented by the Greek letter theta. The rate at which an option loses its value increases more rapidly during the final 30 days of an option's life.

Theta
Theta is also commonly referred to as time decay. It represents the options loss in theoretical value for each day the underlying price remains unchanged. An option with a theta of 0.

This position has a complex profile in that the Greeks Vega and Theta affect the profitability of the position differently, depending on whether the underlying spot price is above or below the upper strike.

Even though it has Theta on its side, it has Delta and Gamma working against it. For the small amount of Theta that you get from a credit spread, you are picking up even more danger by trading this option spread with very high Gamma.

Options traders often refer to "the greeks", especially Delta, Vega, and Theta. These are mathematical characteristics of the Black-Scholes model named after the greek letters used to represent them in equations.

where κ is the mean-reverting speed, θ is the long-run mean, ξ is the volatility of volatility, dW1 and dW2 are two Wiener process (Brownian motion) with correlation coefficient, ρ.

A short straddle is a play on low volatility and theta decay. It involves selling 1 at the money call and put at the same strike price with the expectation that the stock stays within a tight range.
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In Options Trading, the 5 Greeks are: Gamma, Delta, Theta, Rho, and Vega. They are described below but at our level of trading it is only the Delta that we need to know about. The rest can best be left for the professionals.

What Calls Puts delta gamma vega theta rho
Note that the gamma and vega formulas are the same for calls and puts. This can be seen directly from put-call parity.

Time decal : See Theta.
Time Value : That part of an option premium which reflects the length of ...
Trade Balance : The Trade Balance is a measure of the difference between ...

The theta describes the time decay of an option. The vega describes the effect of changes in the implied volatility on the value of the option. Rho is the option's sensitivity to changes in interest rates.

Prior to expiration, the change in time value with time is non-linear, being a function of the option price. Note that theta does NOT reflect the sensitivity of the time value to the amount of time to expiry.

Put-Call Parity
Theoretical Pricing Models: Binomial Option Pricing And The Black-Scholes Formula
The Greeks: Delta, Gamma, Theta, Vega, and Rho
Employee Stock Options; Back-dated Options
Exotic Options ...

Theta: The sensitivity of an option's theoretical value to a change in the amount of time to expiration.

See also: Option, Market, Trading, Stock, Options