If you are interested in trading options for insurance, or to protect their equity positions, you need to know something about "the Greeks". Investors can then make informed decisions about the risks of their positions.

Greek 101:

Delta:

Flags amount an option vary in price so the value changes of the underlying shares. Shares have a delta of 1. Options and stocks in the US are traded in multiples of 100, so if the delta of an option is 100, which mimics the stock. the probability that the option expires is said Delta reflected "in the money". Delta changes as the value of changes in inventories.

Range:

Measurement sensitivity to changes in delta relative to the underlying material. The shares have a zero range. Gamma is usually the highest "in the money". As the option is "in-to-the-money" or "out-of-the-money" increases Gamma.

Theta:

The amount of time or decay time for an option. It is a measure of the variation of the value of an option that the option nears expiration. The pursuit of exhalation plus theta variance.

Vega:

The amount measurement option will increase or decrease in value relative to a change in volatility. For practical reasons, Vega may be important for strategies that are sensitive to variations in volatility. If Vega is high, the fork can be bought at the bottom, and can be sold.

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