A kind of optioned stock mortgage loan system is arranged to carry out high ratio loaning by using a kind of raw material. Match during sale/buying about the raw material as safety with the failure of an optioned stock mortgage loan, so as to one option trade of an option trade processor process. One information computing unit (1610) calculates mortgage loan money and interest by using option trade details and optioned stock mortgage loan information. One loan processor (1615) handles mortgage loan by the mortgage loan money and interest calculated. One information-storing device (1620) is stored in the mortgage loan process details in a memory bank (1630).
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