题目6多选题
Which of the following are right about currency options? ( )A. It differs from a forward contract, in which the parties are obligated to execute the transaction on the maturity dateB. It differs from a futures contract, in which the parties are obligated to transact at maturity,or liquidate the position before the maturity or delivery dateC. The option writer, is exposed to unbound riskD. European style options should be exercised only on the expiration dateE. The option premium is the money paid by the writer to the buyer to compensate the potential loss