What is delta definition?

Delta is a Greek letter symbolized by a triangle with a vertical line drawn through the middle. In mathematics, it is used to represent change or the difference between two values. It can refer to the change in a variable or function, usually represented by the Greek letter Δ (delta), which means "difference" or "change." In science, delta is used to represent the downstream flow of a river, which is formed as the river reaches the end of its course and empties into a larger body of water. The delta ecosystem is characterized by unique flora and fauna that have adapted to the changing water levels and sediment deposition in the area. In finance, delta is used to describe the rate of change in the price of an option relative to the underlying asset. It is a measure of the option's sensitivity to changes in the price of the underlying asset.