The monetary policy tool most frequently used by the federal reserve is: changes in the discount rate. changes in the required reserve ratio. changes in the money supply. open-market operations. this tool is the best choice in most circumstances because it is performed on: an annual basis, doesn’t inconvenience the fed, and doesn’t require banks to take loans from the fed. an annual basis, doesn’t inconvenience bank managers, and doesn’t require banks to take loans from the fed. a daily basis, doesn’t inconvenience bank managers, and doesn’t require banks to take loans from the fed. a daily basis, doesn’t inconvenience bank managers, and doesn’t require banks to take loans from each other. rev: 11_21_2018_qc_cs-149042