Financial derivative instruments, which are created by financial experts, play an important role in the world of high finance. To deal with the risk, mainly price risk, these instruments have appeared and begun to change and promote day in, day out. Their importance may appear when it happens to them to be published more than base stock; great sum of money would be transferred by and ends by paying the difference in price, not caring for contents of contract. This research paper tends to have a juridical analyse over these instruments. Explaining these instruments, first their legal nature would be identified and then, juridical judgement would be inferred. Most of the instruments which are created to satisfy the requirements of economic agents can be revised by law. May be, these instruments are misused, but this is incidental, as it may happen about other legitimate instruments like principle of commerce.
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