The BoK has developed three monetary policy tools, to wit, the lending facility, the required reserve system, and open market operations, which have led to changes in its assets and liabilities. The BoK uses these tools to influence intermediate targets, such as the money stock and interest rates, and to achieve price stability as its final goal. It has also added to its existing toolbox a standby facility, which has gained in importance under the current interest-rate-setting monetary policy framework. This chapter looks at the main components of the assets and liabilities of the BoK, and examines its credit and monetary policy tools.