Derivatives are investment vehicles whose price is dependent on an underlying asset. The most common form of derivatives include stock options, futures & swaps. Options are contracts that give the holder the right but not the obligation to buy or sell a specific security at a pre-determined price on a pre-determined date. The two kinds of options are call and put options. A call holder has the right but not the obligation to “call” stock away from the call writer. So as the price of the underlying security, in this case a stock moves up (or down) the call option becomes worth more (or less). Since derivatives are essentially a contract with an associated value there are many forms of derivatives. Some companies use derivatives to hedge against natural resource price swings or fluctuations in weather that may affect yields.
Example: A lease option to buy a house. The lease contract has terms that give you the right to buy the house at a specific price any time you want (until the lease contract expires). Suppose the terms stated that you could buy the house anytime within the first year of leasing from the owner for 100,000. If the price of the house (local real estate boom) increased to 150,000 you could buy the house for 100,000 and then sell it for 150,000 for a profit of 50,000. If the price of house price dropped (perhaps crime increase) you would have no incentive to exercise your option to buy, so you let that contract expire (worthless) and you do not buy the house. As illustrated here, the contract derives its value NOT from the paper on which it is written, but from the actual market price of another object (the house in this case). This is the basic premise for instruments of specualation known as derivatives.
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