PROBLEM TO BE SOLVED: To provide a stock price index future trading of which dealing object is a stock price index itself in spot stock trading while offering an environment where a trading loss for an orderer is suitably restricted.;SOLUTION: Transaction processing is performed against order information entered by an orderer of a stock price index future transaction into an orderer terminal. For the processing, a bid price and/or an offer price made by a market maker who offers such price in stock price index future transactions of which dealing object is a stock price index in spot stock trading is used. In daily mark-to-market processing at the end of a trading date, interests and dividends for unsettled transactions owned by the orderer at the time of transaction termination is calculated for the period between the transaction date and the next transaction date. A processing for delivering the calculated interests and dividends between buyer and seller of unsettled transactions is performed. In addition, a balance gain and loss of an unsettled transaction is calculated with the mark-up price of the trading date.;COPYRIGHT: (C)2012,JPO&INPIT
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