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Option Gamma : A first attempt
Issued on November 15 2011 par Strategies-options.com

Rate of change of delta is far from constant.
I - Option Delta Fluctuates

We saw that delta means option value rate of change to the underlying. A kind of speed.

That speed isn't steady.
Gamma Г is the rate of change of delta to the spot. If delta is like speed, gamma is like acceleration.

If S(+) is a spot level above current spot, S(-) a spot under the current level, ∆(+) the delta for S(+) and ∆(-) the delta for S(-),





II - For example

During the same day, if an option delta is 0.55 for a spot at 82 and 0.58 for a spot at 85, gamma Г is :

Г=(0.58-0.55)/(85-82)=0.03/3=0.01


Usually, one looks for small spot moves. Thus gamma Г is often written as a derivative.



Next : Option Gamma Г
Previous : Option Delta ∆

OPTIONS 101 - INDEX
OPTIONS 101 - CHAPTER I
OPTIONS 101 - CHAPTER II
OPTIONS 101 - CHAPTER III
OPTIONS 101 - CHAPTER IV
OPTIONS 101 - CHAPTER V
OPTIONS 101 - CHAPTER VI

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