U.S. Financial Institutions

A commercial bank is a profit-oriented financial institution that accepts deposits, makes business and consumer loans, invests in government and corporate securities, and provides other financial services. Commercial banks vary greatly in size, from the "money center" banks located in the nation's financial centers to smaller regional and local community banks. As a result of consolidations, small banks are decreasing in number. A large share of the nation's banking business is now held by a relatively small number of big banks. There are approximately 5,011 commercial banks in the United States, accounting for nearly $16 trillion in assets and $9 trillion in total liabilities.

Banks hold a variety of assets, as shown in the diagram in (Figure).

(Figure) lists the top 10 insured U.S.-chartered commercial banks, based on their consolidated assets.

Assets of FDIC-Insured Commercial Banks, 2017

Customers' deposits are a commercial bank's major source of funds, the main use for which is loans. The difference between the interest the bank earns on loans and the interest it pays on deposits, plus fees it earns from other financial services, pays the bank's costs and provides a profit.

Commercial banks are corporations owned and operated by individuals or other corporations. They can be either national or state banks, and to do business, they must get a bank charter – an operating license – from a state or federal government. National banks are chartered by the Comptroller of the Currency, who is part of the U.S. Treasury Department. These banks must belong to the Federal Reserve System and must carry insurance on their deposits from the Federal Deposit Insurance Corporation. State banks are chartered by the state in which they are based. Generally, state banks are smaller than national banks, are less closely regulated than national banks, and are not required to belong to the Federal Reserve System.