In the derivative market the values are derived from the underlying assets. The derivatives are like future contract, call option contract and put option contract. In the above derivative instruments the contract expires at the expiry date. In the future contract margin amount is must. In the option contract premium is must. In future contract Margin to Market is there, In the option contract the strike price is there. we can buy the shares, in the derivative market , only in the lot size already decided by the exchange.