Option Greek Delta
Your Options position is always going to be most responsive to the movement of the stock itself. And Delta measures this sensitivity to price movement, and that's why its the King of the Greeks. Delta plays many roles. It represents the directional bias of your position, and it also represents the approximate probability of the Option going In-The-Money, and this value can change dramatically.
King of all Greeks
Delta represents how much your Option price will go up or down for a corresponding $1 move in the underlying stock. Delta has the most impact of all 4 Greeks on the Option prices. Delta is the first Derivative of Price movement, rate of change of Price
Delta and Probability
Delta also represents an approximate probability of the Option going In The Money. You'll learn how Delta moves with Price, and the rate at which the probability of the Option going In The Money also changes
Calls and Puts Delta
Delta for Calls are represented by positive numbers from 0 to 1. And the Delta for Puts are represented from -1 to 0. Puts and Calls Delta works the same in all other respects
Delta and Moneyness
Deltas for In the Money Options range from 0.5 to 1, and Deltas for Out of the Money Options range from 0 to 0.5. An At The Money Option will have Delta close to 0.5
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