The Main Concepts of The Futures Contracts.

Definition	Explanation
Future contracts	An agreement between a buyer and a seller for a future transaction at a predetermined price.
Underlying asset	Assets which are objects for dealing in the derivative contract.
Margin	The amount of money that investor must deposit to be able to participate in derivatives trading, plays the role of ensuring the solvency of the two contracting parties.
Position	Trading status and volume of derevatives an investor is holding at the specific time.
Close position	Open an opposite position to an existing one having the same underlying assets and expiration date.
Closing price	Price of a derivative contract that is determined by the Stock Exchange to to calculate gain/loss arising at the end of a day of each contract.
Final settlement price	Price of the underlying asset that is determined by the Stock Echange and Clearing House on the last trading day of derevatives based on that asset to calculate gain/loss arising on the last trading day.
Contract multiplier	Coefficient to convert the value of index future contract into amount of money.
Open volume	Number of contracts of a type of Derivative Securities in existence at a time.