Understanding Option Greeks is critical to trading options successfully! If you understand option greeks, then trading option contracts will become very profitable for you. There are a few different greeks to understand, but today I'll go over the most important ones I use. The greeks I'll go over today are Delta, Gamma, Theta, Vega, Rho. Watch THE WHOLE VIDEO to see a bonus segment at the end where I go over a REAL WORLD OPTION CONTRACT (FACEBOOK)!
However, before we get into that, let's start with implied volatility - which isn't a greek, but is very important. The higher the IV, the more expensive option contracts get. The lower the IV, the cheaper they are. You will hear terms like "IV crush" being used a lot - and all this means is the IV of the contract got "crushed" or dropped drastically. This usually happens after earnings for example as you run up to earnings, typically the IV increases, and it usually the highest the day before earnings. Once earnings are out, there's usually no other catalyst right after, and thus the IV drops and the value of the contracts drop the next day.
Greek #1: Delta:
Tells you how much an option's price is expected to change per $1 change in the underlying stock. Ex: Delta of 0.50 means that the option's price will move $0.50 for every $1 move in the underlying stock. Remember, a $0.50 move per contract is actually a 0.5*100 = $50 move in the contract. Call options have a delta from 0 to 1, and put options go from 0 to -1. For calls, you want a delta closer to 1 and for puts, you want a delta closer to -1. The deeper ITM you are, the higher the delta (up to a max of 1).
Greek #2: Gamma:
Measures the rate of change in an option's Delta per $1 change in the underlying stock. Ex: if delta is 0.5, and the underlying moves $1, the new delta isn't 1 anymore. This new delta is calculated by the gamma - which could be for example 0.1. So then the new delta for this contract would be 0.5+0.1 = 0.6.
Greek #3: Theta:
This measures how much value the contract loses over time. The lower the theta, the better the contract is. For example, if a contract has a Theta of 0.03, that means it loses $0.03 from it's value every day as you approach expiry. As you get closer to expiry, Theta gets higher.
Greek #4: Vega:
Measures how the implied volatility of a stock affects the price of the options on that stock. As Vega decreases, calls and puts lose value and as Vega increases, calls and puts gain value.
Greek #5: Rho:
Measures how sensitive a contract is to interest rates. As interest rates increase, the value of call options will generally increase as call options have positive Rho. As interest rates increase, the value of put options will usually decrease because put options have negative Rho.
This can be very confusing, especially for beginners and although I look at all of these, the 3 most important ones that I use are IV, Delta, and Theta. I look for low IV, high delta, and low theta - a good combination of this is a good value contract that I typically trade.
Remember to watch THE WHOLE VIDEO to see a bonus segment at the end where I go over a REAL WORLD OPTION CONTRACT (FACEBOOK)!
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