Final answer:
True, the most commonly used tool of monetary policy by a central bank is open market operations, which involve managing the supply of money and the level of interest rates by buying or selling government bonds.
Step-by-step explanation:
The statement that the most commonly used tool of monetary policy by a central bank is open market operations is true. Open market operations involve the central bank buying or selling government securities, such as U.S. Treasury bonds, to regulate the money supply and influence interest rates.
Among these tools, open market operations directly affect the federal funds rate, which is the rate at which commercial banks borrow and lend their excess reserves to each other overnight.
While reserve requirements specify the minimum reserves a bank must hold, they are adjusted less frequently. The discount rate is the interest rate charged on loans from the central bank to commercial banks but used more as a signal of policy direction rather than a regular policy mechanism.
In summary, the central bank utilizes open market operations most frequently because it provides a quick and effective means of adjusting the money supply and influencing the broader economy. It is a prime instrument for carrying out monetary policy objectives such as managing inflation, stabilizing currency, and fostering economic growth.