This question is frequently asked by those who want to learn more about options. The word delta comes from the fourth letter of the Greek alphabet and is universally abbreviated as a triangle. As it relates to options, delta is really very simple. Specifically, it is the amount that an option will theoretically change in price for a one-point move in the stock. Let's stop here for a moment.
Deltas are similar to baseball averages.
They are quoted like integers but are actually percentages. A 300 batting average is really .300 or 30 percent. We have discussed delta so far only in reference to calls. Delta is used to set up expectations. The delta is an important piece of information that may help you with this decision.