What is the most direct method the Fed uses to change the monetary base?

Question

Quizplus · Accepted Answer

Open market operations involve the Fed buying or selling government securities, which directly affects the level of reserves in the banking system and thus the monetary base. This is the most direct method for the Fed to change the monetary base. Changing the required reserve ratio, federal funds rate, or level of discount loans can indirectly affect the monetary base through their impact on bank lending and deposit creation.

What Is the Most Direct Method the Fed Uses to Change