#日内交易策略 During that period, due to the lack of a reliable currency standard (people had tried to use coins as hard currency to serve as a pricing standard, but as coins depreciated, this attempt failed), rice became the de facto medium of exchange. If a lord needed funds, he would transport surplus rice to Osaka and store it in warehouses there under his account. He would receive corresponding rice warehouse receipts as a receipt for this batch of rice.