The central bank negotiable certificates of deposits is one of the instruments for balancing the surplus of capital in the market. The Certificates of Deposits of CBC are divided into the negotiable and the non-negotiable certificates of deposits. These are issued to eligible financial institutions, including banks, investment and trust companies, bills finance companies, Chunghua Post Co., Ltd. and other financial institutions approved by the CBC. The purchase of negotiable certificates of deposits is a way of investment for the eligible institutions allocating their cash flow and as the legal deposit reserves.