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The derivative is a kind of financial investment tool, its value comes from or reflects that since the price of assets (for example stock , index or goods ) which it appoints is changed . The generally common derivative has futures , forward contract , option and card of allotment of shares ,etc..

The derivative can weigh and reflect the tendency of the market by opposing and washing the risk , set . On the market: three kinds of participants, in order to weigh personages in washing personage , speculator , and set respectively. Because unwilling to undertake the risk to washing personages, it is convenient to prevent the change of the price on the market with the derivative. Because the financial market is having fluctuation of the price, it is convenient for the speculator to earn profits with the derivative, buy out when the price is bought in while rising , the price drops. Set weighs personages and utilizes the derivative, buy in and sell the same or similar financial product at the same time at different prices on different markets, thus obtained the repayment without risk.

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Derivatives are a kind of investment vehicle which derives its value from its underlying assets (eg. equities, index futures or commodities) or their changes in price. Futures, forward contracts, options and warrants are all derivatives commonly found on the market.

Derivatives can be used to hedge risks and reflect market movements. There are 3 kinds of market participants of derivatives: hedgers, speculators and arbitrageurs. Hedgers are those who are unwilling to take high risks and intend to protect their own investments in times of a falling market. Speculators use derivatives to take profit by buying in when prices are on the rise and selling off when prices are on the downside. Arbitrageurs make use of derivatives to maintain return on investment without taking any risk by simultaneously buying and selling the same or similar financial instruments at different prices on different markets.