To provide a stock trading system capable of allowing a user to swiftly carry out stock transaction while reflecting real time stock price on a portable terminal.SOLUTION: A trading terminal 110 is configured to display a list of stock names available for trading transaction, and when a user selects any stock name from the displayed stock name, to display buttons for carrying out the trading of the selected stock name on the trading terminal 110. The trading terminal 110 is also configured so as to, when the user expresses a will to sell or purchase and inputs a transaction amount (purchase or sell amount), display the number of stocks on the basis of the input transaction amount. The number of stocks based on the transaction amount reflects real time stock price, and when the transaction will is finally confirmed on the calculated stock price, the trading terminal 110 transmits a transaction execution request for executing the transaction to a stock system 120.SELECTED DRAWING: Figure 1
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