Fractional Reserve Banking - An Introduction

Fractional Reserve Banking

Fractional-reserve banking is a banking system in which banks hold only a fraction of deposits as reserves. Reserves are a commercial bank’s deposits in accounts at a Federal Reserve Bank plus its vault cash. Vault cash is the currency held in the commercial bank’s vault. When banks hold only part of their deposits as reserves, they are able to create money by making loans. If banks held all deposits as reserves, banks would not influence the money supply because they would not be able to issue loans. The money supply increases when banks create new loans. The money supply decreases when banks reduce the amount of money loaned to the public.

Banks are businesses that make profits by accepting deposits of funds and lending a portion of them to businesses and households. Banks pay depositors little or no interest, but charge moderate to high interest rates to borrowers. The difference in the interest rates charged to borrowers and paid to depositors allows banks to cover their costs of operation and make a profit.

When a customer deposits currency in a bank, the bank does not write the customer’s name on it and place it in the vault until the customer returns to withdraw it. Only a small fraction of all the money deposited in banks is kept in the bank's vault or on account with the Fed. The majority of the money deposited in banks is loaned to businesses or households or otherwise invested by the bank.

To illustrate how fractional reserve banking works, it helps to examine a simplified bank balance sheet.



Table 2. A simplified balance sheet for a commercial bank.
Balance Sheet of the First National Bank
Assets
Liabilities & Net Worth
Reserves
(required = $ 1,000,000)
(excess = $ 400,000)
$1,400,000
Deposits
$10,000,000
Loans
$7,500,000


Government Securities
$ 900,000


Property & other assets
$600,000
Net Worth
$ 400,000




Total Assets
$10,400,000
Total Liabilities
& Net Worth
$10,400,000


The left side of the balance sheet lists the assets of the bank. An asset is a financial claim or piece of property that is a store of value. Assets are what the bank owns or is owed. The right side of the balance sheet lists the bank’s liabilities and net worth. Liabilities are debts. Liabilities represent what the bank owes someone else. Net worth is the difference between a firm’s assets and its liabilities. In the sample balance sheet above, the bank’s assets include reserves, loans, government securities, and property & other assets. Reserves are the bank’s deposits in accounts with the Fed plus currency that is held in the bank’s vault. Required reserves are the vault cash and deposits at the Fed that commercial banks hold to meet the Fed’s requirement that for every dollar of deposits at a bank, a certain fraction must be kept as reserves. Excess reserves are the vault cash and deposits at the Fed that commercial banks hold is addition to those held to meet the Fed’s requirement that for every dollar of deposits at a bank, a certain fraction must be kept as reserves. Thus, excess reserves are the reserves that banks hold in excess of the required reserves. U.S. government securities are long-term debt instruments (such as bonds) issued by the U.S. Treasury to finance the budget deficits of the federal government. They are the most widely traded bonds in the United States and are thus the most liquid security. Liquidity is the relative ease and speed with which an asset can be converted into cash. Loans are assets for banks because they represent money that the borrowers owe to the bank. Deposits are liabilities for banks because they represent money that the bank is obligated to pay back to the depositors. By definition, net worth is assets minus liabilities.