Commercial Companies, from time to time, implement reverse repurchase agreement ('repo') operations in order to utilize their fund surplus. Reverse repo operation is a process of buying securities with the undertaking to sell back. Regarding reverse repo operations, the right for selling back the securities essentially exists, however, whether the right will be used is subject to the company's choice. Neverthless, with the regulation of Stock Exchange Commission, the companies are obligated to sell them. This affected the essence of the reverse repo operations and lead them to assume a characteristic of a money exchange with interest instead of a buying-selling operation of securities. This, in turn, has a significant effect on putting the repo operations in the accounting system.