M1 is the standard definition of the money stock. It is the sum of cash in the hands of the
public, demand deposits, other checkable deposits, and travelers’ checks. For simplification, this
chapter defines the money supply as cash in the hands of the public plus demand deposits.
Money has several functions including acting as a means of payment, a unit of account, and a
store of value.
Banks are important examples of financial intermediaries—business firms that assemble
loanable funds and channel those funds to borrowers. A bank’s assets include property and
buildings, government and corporate bonds, loans, vault cash, and accounts with the Federal
Reserve. The Federal Reserve requires that banks hold a minimum fraction of their deposits as
vault cash or accounts with the Fed. These are a bank’s required reserves. Total reserves less
required reserves equals excess reserves. Demand deposits are a bank’s liability, because
customers have the right to withdraw these funds from their checking accounts. A bank’s net
worth is equal to total assets minus total liabilities.
Congress established the Federal Reserve System in 1913, as a corporation whose stockholders are
the private banks that it regulates. There are 12 Federal Reserve Banks, each serving a different part
of the United States. The Board of Governors supervises the Federal Reserve System. This board
consists of seven members who are appointed by the President, and confirmed by the Senate for a
14-year term. The most powerful person at the Fed is the Chairman of the Board of Governors, who
is appointed by the President for a four-year term. The Federal Open Market committee consists of
all seven governors of the Fed, along with the 12 district bank presidents. It meets about eight times
per year and sets the general course for the nation’s money supply.
Some of the Fed’s most important responsibilities are supervising and regulating banks, acting
as a bank for banks, issuing paper currency, clearing checks, guiding the macroeconomy, and
dealing with financial crises.
The Fed uses open market operations to control the money supply. It buys government bonds
when it wants to increase the money supply, and sells government bonds when it wants to
decrease the money supply.
When the Fed buys government bonds, it injects reserves into the banking system. This increases
the amount of excess reserves in the banking system, which allows banks to make new loans. When
banks create loans, the total supply of money increases. When the Fed sells government bonds, it
removes reserves from the banking system, and causes the money supply to contract.
The money multiplier is the number by which we multiply an injection of reserves to get the
total change in demand deposits. The size of the money multiplier is negatively related to the
required reserve ratio. The multiplier is weakened by the public’s desire to hold cash and banks’
desires to hold excess reserves.
The Fed can also control the money supply by changing the required reserve ratio or by changing
the discount rate (the rate the Fed charges banks when it lends them reserves). Lowering the
required reserve ratio or the discount rate increases the money supply, and vice versa.