Refers to the Greek letters used in options trading formulas and analysis such as "delta, theta, etc".
The Greek letters used to describe various measures of the sensitivity of the value of an option with respect to different factors. They include Delta, Gamma, Theta, Rho, and Vega.
Delta, Gamma, Rho, Theta and Vega are a set of factors written as Greek symbols in algebraic equations. They are used to model the behaviour of options in correlation to changes in the value of the underlying financial instruments, interest rates, time and volatility.