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Last Updated: Sep 2009
What are Stock Options?
This versatility, however, does not come without its costs. Options are complex securities and can be extremely risky. This  is why, when trading options, you'll see a disclaimer like the following: Options involve risks and are not suitable for  everyone. Option trading can be speculative in nature and carry substantial risk of loss. Only invest with risk capital.

Types of Options:
Real option (real option) is a choice that an investor has when investing in the real economy (i.e. in the production of  goods or services, rather than in financial contracts). This option may be something as simple as the opportunity to expand  production, or to change production inputs. Real options are an increasingly influential tool in corporate finance. They are  typically difficult or impossible to trade, and lack the liquidity of exchange-traded options.

Traded options (also called "Exchange-Traded Options" or "Listed Options") is a class of Exchange traded derivatives. As for  other classes of exchange traded derivatives, trade options have standardized contracts, quick systematic pricing, and are  settled through a clearing house (ensuring fulfillment). Trade options include
- stock options, discussed below,
- commodity options,
- bond options,
- interest rate options
- index (equity) options,
- currency cross rate options, and
- swaption.

Vanilla options are 'simple', well understood, and traded options; Exotic options are more complex, or less easily  understood. Asian options, lookback options, barrier options are considered to be exotic, especially if the underlying  instrument is more complex than simple equity or debt.

Employee stock options (employee stock option) are issued by a company to its employees as compensation.
An option is a contract that gives the buyer the right, but not the obligation, to buy or sell an underlying asset at a  specific price on or before a certain date. An option, just like a stock or bond, is a security. It is also a binding  contract with strictly defined terms and properties.

When you buy an option, you have a right but not an obligation to do something. You can always let the expiration date go by,  at which point the option becomes worthless. If this happens, you lose 100% of your investment, which is the money you used  to pay for the option. Second, an option is merely a contract that deals with an underlying asset. For this reason, options  are called derivatives, which means an option derives its value from something else.

The power of options lies in their versatility. They enable you to adapt or adjust your position according to any situation  that arises. Options can be as speculative or as conservative as you want. This means you can do everything from protecting a  position from a decline to outright betting on the movement of a market or index.
Stock Options
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