Future contracts enables the buying and selling of stocks on a future date at an agreed price. Through this contract buyer gets rights to buy and seller gets rights to sell on a fututre date.In option trading buyer has rights to buy and no obligations. And buyer has to pays premium to the seller to cotract get signed.
A futures contract gives the parties the obligation to buy or sell the stock at a specific future date.Margin is a collateral that collects from the trader to buy the share in the futures
Mark -to-market refers to accounting the fair value the asset or liability based on current market price
Premium is the moneypaid by the buyer of the option to contract signed.it is refundable
Strike price is the price at which an option contract can be exercised.
Expiry Date is a last date of contract
Lot size is reffered as a total number of shares that can trader should buy
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