Options Greeks
How do you use the greeks calculators for the options,and how many of you know the use of the gamma,options price, volatility, delta, gamma, theta, and vega.
They are all included in the analytics of the options.Along with volatility measurements and options pain analysis.
Option Gamma
Gamma measures the rate of change of delta due to a one-point change in the price of the underlying stock. The option Greek gamma (Γ) measures the change in delta when the stock price increases by $1.In other words, Gamma estimates how much delta would change if the price of the underlying stock changes by $1. So, it can tell you how stable; your delta is.Whether a call or a put is purchased, gamma is positive. Thus, delta increases as the stock price increases.
Bigger figures means that your delta can start changing considerably for even a small move in the stock price. Shows how volatile an option is relative to movements in the underlying asset. So, by watching your gamma will let you know how large your delta (which is the position risk) changes.Unlike delta, gamma is always positive for both Calls and Puts.Deep in-the-money and out-of-the money options both have values of gamma close to 0.
Delta
The delta of an option is the sensitivity of an option price relative to changes in the price of the underlying asset. It tells option traders how fast the price of the option will change as the underlying stock/future moves.
Delta is a number that measures how much the theoretical value of an option will change if the underlying stock moves up or down $1.00.For example, if we take on the call options, a delta of 0.8 means that for every $1 the underlying stock increases, the call option will increase by $0.80. Positive delta means that the option position will rise in value if the stock price rises, and drop in value if the stock price falls. Negative delta means that the option position will theoretically rise in value if the stock price falls, and theoretically drop in value if the stock price rises.For put options it will be like a delta of -0.8 will decrease by $0.80 for every $1 the underlying increases in price.
When it is in-the-money call option near to expiration then it will be $1
When in in-the-money put option near to expiration then it will be in -$1 thats it.
Long calls have positive delta; short calls have negative delta.Long puts have negative delta; short puts have positive delta. Long stock has positive delta; short stock has negative delta. The closer an option’s delta is to 1.00 or –1.00, the more the price of the option responds like actual long or short stock when the stock price moves.
| Type | Delta value | Profits When… |
| Long Call Option | Positive | Stock Goes Up |
| Short Call Option | Negative | Stock Goes Down |
| Long Put Option | Negative | Stock Goes Down |
| Short Put Option | Positive | Stock Goes Up |
Theta
Theta is the rate of decay or the decline in the value of the stock over time in an option’s value that can be attributed to the passage of one day’s time.Basically it is based on the neutral options strategies which aims to profit from the decay of extrinsic value or Time Decay. Theta is that options greek which tells you how much an option’s price will diminish over time, which is the rate of time decay of stock options. With this spread, investors can exploit the decay of theta to their advantage to extract profits from their position.
By hedging the net gamma and the net delta of investors position, they can safely keep their position direction neutral in terms of price.After understanding how it works investors can better understand the application of options strategies for time decay.
All long stock options positions have negative Theta values, which indicates that they lose value as expiration draws nearer. All short stock options positions have positive Theta values, which indicates that the position is gaining value as expiration draws nearer.
For making profit investor have to make sure that the aggregate theta values of those positions are positive in order to turn a profit.
Vega
It indicates the price of the option which will change as the volatility of the underlying asset changes.It is an estimate of how much the theoretical value of an option changes when volatility changes 1.00%.
Higher volatility means higher option prices. The reason for this is that higher volatility means a greater price swings (Up and downs) in the stock price, which translates into a greater likelihood for an option to make money by expiration.Vega is most sensitive when the option is at-the-money and tapers off either side as the market trades above/below the strike.The vega of At-the-Money options is higher when either volatility is higher or there are more days to expiration.
Well vega works on the basis of the implied volatility which means the more a stock is expected to make a big move due to some important news release or earnings release in the near future, the higher the implied volatility of that stock is right now.Just reverse of it happens in volatility crunch time as it happens after the news released.Vega is highest for At-the-Money options, and is progressively lower as options are In-the-money and On-the-money. This means that the value of ATM options changes the most when the volatility changes.
REFERENCES
http://www.optiontradingpedia.com/options_theta.htm
http://www.optiontradingtips.com/greeks/vega.html
https://www.thinkorswim.com/tos/displayPage.tos?webpage=lessonGreeks
