The English-Chinese Dictionary of Securities Investment by the Commercial Press explains: margin. Margin paid by investors to companies engaged in related businesses when trading futures and options to ensure the performance of contractual obligations. This fund is only a down payment, not a part of the contract money.

The English-Chinese Dictionary of Securities Investment by the Commercial Press explains that the English for margin is: option price; ; Premium. Also: option premium; Royalties; Option contracts price. In the process of option trading, the deposit paid by the holder who opens a call option position to the seller who opens a put option position. It can be understood as the transaction price of the option contract. In the option trading market table published in the newspaper, the option premium is quoted as a multiple of 1/8 or116 of the market price of the exercise variety. Stock options take 100 shares as a trading unit. If the stock call option with a market value of 100 yuan is quoted at 5/8 yuan, it means that the right to buy a stock is 62.5 points, that is, 100 shares is 62.5 yuan. See: option price, option price.