A letter of the Greek alphabet corresponding to th in English; sometimes called the unlucky letter, from being used by the judges on their ballots in passing condemnation on a prisoner, it being the first letter of the Greek qa`natos, death
An elusive operational description of the `best' input value to a simulator The front runner at the moment is not an operational description but a convenient modelling assumption It is assumed that there exists an input such that, given the simulator output at that input, reality is conditionally independent of the simulator outputs at all other inputs This assumption is often made implicitly [JCR, 17 04 00]
The option sensitivity which refers to the time decay of options Options lose value very slowly up until approximately 40 days or so, when the option begins to deteriorate at an increasing rate
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
energy peculiar to life or a thetan which acts upon material in the physical universe and animates it, mobilizes it and changes it; natural creative energy of a thetan which he has free to direct toward survival goals, especially when it manifests itself as high tone, constructive communications See also thetan
Scientology Energy peculiar to life or a thetan which acts upon material in the physical universe and animates it, mobilizes it and changes it; natural creative energy of a thetan which he has free to direct toward survival goals, especially when it manifests itself as high tone, constructive communications See also thetan
A brainwave ranging from 4-8 Hertz Theta is a state of deep relaxation Sometimes a sleep state, sometimes not, theta reflects a state of dreamlike awareness Dreams and a deep, meditative state of consciousness are common characteristics of 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
The rate of change in the price of a derivative security relative to time Theta is usually very small or negative since the value of an option tends to drop as it approaches maturity
Represents the loss in value an option will experience due to the passage of time Theta is usually expressed on a per day basis For example, if an option has a theta of -0 25, the option will lose about $0 25 a day, provided the underlying stock price and volatility hold constant