Dealing method enabling a deal clinching ratio

摘要

A deal processing apparatus, which clinches a deal by intermediating a sell order and a buy order, comprises a sell/buy determining unit clinching a deal by determining a pair of sell and buy orders with which a deal is to be clinched. The sell/buy determining unit obtains a sell/buy profit by clinching a first deal with sell and buy orders in which a desired sell price is lower than a desired buy price. Then, the sell/buy determining unit clinches a second deal with sell and buy orders in which a desired buy price is lower than a desired sell price. A quantity to be dealt in the second deal is determined so that a sell/buy loss that a broker suffers in the second deal does not exceed the sell/buy profit that the broker obtains in the first deal. In this way, a deal is clinched while reducing the risk that a broker who intermediates orders with this dealing method suffers a sell/buy loss, even if a desired sell price of a sell order does not match a desired buy price of a buy order.