Stock Options Greeks - Gamma Explained and Relations with Delta

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By growithyou

This trading tutorial explains what Greeks are and how much important is their understanding for today’s financial investors and traders. The aim of this article is to show you how to read and utilize the Greek known as Gamma.


How to place the most rewarding options strategies from scratch? Visit my website at www.FromZeroToOptions.com to get tutorials, instructions, articles and much more stocks and options related.

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The Gamma - Definition

Gamma is considered the acceleration of delta. It tells us how fast the speed of delta change given $1 movement in the underlying stock. It is always a positive number when you buy options (call or put) and a negative number when you sell options (call or put). This characteristic allows distinguishing gamma from delta. In fact, gamma is not connected with the trade direction (long or short), but is related with the fact that you are a net seller (net credit position) or a net buyer (net debit position) of options. As a result, if you buy an options strategy (net debit position), your gamma will be positive; whilst, if you sell an options strategy (net credit position), your gamma will be negative.

An interesting characteristic of gamma is that it has a higher value for options close at-the-money. This has a strong impact because means that deltas for ATM options are more sensitive to a change in the price of the underlying security.

How to set Greeks for Options Strategies

The Greeks are mathematical indicators that bear on the price of options helping you to understand the direction of your trade and the impact of time and implied volatility on your options. You don’t need mathematical skills to understand how to calculate them. There are many software can do this job for you. All you need is to know how to read Greeks to make better financial decisions.


Free Tutorials - Stocks, Options, ThinkorSwim and more.. Click Here!


Understanding Gamma - Mechanics and Relation with Delta

In more details, how gamma works and the relation with delta can be described as follows:

Buy Call Options (long call - net debit); gamma is always positive because you are net buyer of options. It reaches its highest value when the underlying stock is around the strike price (the position is ATM) and, consequently, the delta moves at its maximum rate. Delta is always positive too.

Sell Call Options (short call - net credit); gamma is always negative because you are net seller of options. It reaches its lowest value when the underlying stock is around the strike price (the position is ATM) and, consequently, the delta moves at its maximum rate. Delta is always negative too.

Buy Put Options (long put - net debit); gamma is always positive because you are net buyer of options. It reaches its highest value when the underlying stock is around the strike price (the position is ATM) and, consequently, the delta moves at its maximum rate. Delta is negative.

Sell Put Options (short put - net credit); gamma is always negative because you are net seller of options. It reaches its lowest value when the underlying stock is around the strike price (the position is ATM) and, consequently, the delta moves at its maximum rate. Delta is positive.


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Do not forget to visit my website at www.FromZeroToOptions.com to get tutorials, instructions, articles and much more stocks and options related.

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Understanding Gamma - Relations among Gamma, Vega and Theta

Buy Call Options (long call - net debit); gamma and Vega are always positive because you are net buyer of options. They reach their highest value when the underlying stock is around the strike price (the position is ATM), but while gamma (as well as theta) increases its value as options come closer to expiration, Vega decreases its value. In fact, Vega is greatest for options far from expiration and it becomes less important while options approach expiration. Conversely, theta is always negative when you buy options premium, because time decay hurts your position (you lose money as time goes).

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Sell Call Options (short call - net credit); gamma and Vega are always negative because you are net seller of options. They reach their lowest value when the underlying stock is around the strike price (the position is ATM), but while gamma(as well as theta) increases its value as options come closer to expiration, Vega decreases its value. Conversely, theta is always positive when you sell options premium, because time decay helps your position (you make money as time goes).

Buy Put Options (long put - net debit); gamma and Vega are always positive because you are net buyer of options. They reach their highest value when the underlying stock is around the strike price (the position is ATM), but while gamma (as well as theta) increases its value as options come closer to expiration, Vega decreases its value. Conversely, theta is always negative when you buy options premium, because time decay hurts your position (you lose money as time goes).


Free Tutorials - Stocks, Options, ThinkorSwim and more.. Click Here!



In the next GroWithYou Trading Tutorial:

  • How to set Greeks for Options Strategies;
  • The Theta - Definition;
  • The Impact of Time Decay on Options;
  • Understanding how Theta works.


Keep learning about Options Strategies and ThinkorSwim by going to: Stock Options Greeks - Theta Demystified and the Time Decay Effect.


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