Patent ID: 8200571

Claim:
A margin trading system connectable to a plurality of trading terminals and a transaction-covering bank terminal via a network, comprising: a receiving apparatus that receives order information from said plurality of trading terminals; a plurality of processing apparatuses, each processing apparatus comprising an external storage device; a writing unit configurable to write the received order information to the external storage device; a first transmitting unit configurable to transmit an order receipt notification to said receiving apparatus in response to the completion of write of the received order information to the external storage device; and a calculating unit configurable to calculate a first sum value of the order information stored in the external storage device per predetermined time period; a calculation apparatus that obtains the first sum values each of which was calculated by each processing apparatus and calculates a second sum value based on the obtained first sum values; and an ordering apparatus, comprising a comparing unit configurable to compare the second sum value calculated by said calculation apparatus with a threshold value; a determination unit configurable to determine a first processing apparatus among the plurality of processing apparatuses, when the second sum value is not less than the threshold value; a creation unit configurable to create first order information which cancels the first sum value of the processing apparatus other than the first processing apparatus and to create second order information which cancels the first order information; and a second transmitting unit configurable to transmit the first order information to the processing apparatus other than the first processing apparatus and to transmit the second order information to the first processing apparatus; and a cover-ordering apparatus that conducts covering orders to the transaction-covering bank terminal, wherein said receiving apparatus transmits the order receipt notification received from said processing apparatus to the corresponding trading terminal, the first transmitting unit is further configurable to compare the first sum value with the threshold value and, when the first sum value is not less than the threshold value, transmits an instruction of the covering order to said cover-ordering apparatus, and said cover-ordering apparatus transmits covering order information of predetermined money amount to the transaction-covering bank terminal in response to the instruction of the cover ordering.