Monetary Policy and Fiscal Stabilization The Fed's operation has evolved over time in response to major events. The Congress established the Federal Reserve System in 1913 to strengthen the supervision of the banking system and stop bank panics that had erupted periodically in the previous century. As a result of the Great Depression in the 1930s, Congress gave the Fed authority to vary reserve requirements and to regulate stock market margins (the amount of cash people must put down when buying stock on credit). Still, the Federal Reserve often tended to defer to the elected officials in matters of overall economic policy. During World War II, for instance, the Fed subordinated its operations to helping the U.S. Treasury borrow money at low interest rates. Later, when the government sold large amounts of Treasury securities to finance the Korean War, the Fed bought heavily to keep the prices of these securities from falling (thereby pumping up the money supply). The Fed reasserted its independence in 1951, reaching an accord with the Treasury that 95