Financial Institution

A financial institution is any organization that intermediates between those who have money and those who need it, either by taking deposits, extending credit, facilitating investments, or providing risk protection. Commercial banks, credit unions, investment banks, insurance companies, brokerage firms, and mortgage companies all qualify. The Federal Reserve, the Office of the Comptroller of the Currency, the FDIC, and the SEC each regulate different categories of financial institutions in the United States depending on the institution's charter and activities.

Think of a financial institution as a professional middleman in the money system: it takes resources from one party and channels them to another, earning a fee or spread for doing so.

The Main Categories of Financial Institutions

Financial institutions divide into several distinct types, each serving a different function in the financial system.

• Commercial banks: Accept deposits insured by the FDIC up to $250,000 per depositor per ownership category, extend loans, provide payment services, and manage customer accounts. JPMorgan Chase, Bank of America, and Wells Fargo are the three largest by total assets in the United States.
• Credit unions: Member-owned cooperatives that perform many of the same functions as commercial banks but operate on a not-for-profit basis, often offering lower loan rates and higher deposit yields. Deposits at federally chartered credit unions are insured by the National Credit Union Administration.
• Investment banks: Underwrite securities offerings, advise on mergers and acquisitions, and provide trading and capital markets services to institutional clients. Goldman Sachs, Morgan Stanley, and JPMorgan are the leading U.S. investment banks.
• Insurance companies: Collect premiums and pay claims, intermediating risk across large pools of policyholders. Life insurers are the largest institutional holders of long-duration bonds in the United States.
• Brokerage firms: Execute securities transactions on behalf of clients, provide investment advice, and in some cases act as dealers trading securities for their own account.
• Mortgage companies: Originate home loans, often selling them into the secondary market rather than holding them on balance sheet. Nonbank mortgage companies now originate the majority of U.S. home purchase loans.

Depository vs. Non-Depository Institutions

The most fundamental regulatory divide is between depository institutions, those that take deposits, and non-depository institutions, those that do not. Depository institutions operate under bank charters that give them access to the Federal Reserve's payment system and discount window but also subject them to capital requirements, regular examination, and reserve requirements.

Non-depository institutions like investment banks, insurance companies, and hedge funds access capital markets directly rather than through deposits. They face less direct regulatory oversight in some respects but are subject to their own regulatory regimes. Insurance companies are regulated primarily at the state level. Investment advisers managing more than $110 million in assets register with the SEC under the Investment Advisers Act of 1940.

Systemically Important Financial Institutions

After the 2008 financial crisis, Congress created a new category called Systemically Important Financial Institutions, or SIFIs, through the Dodd-Frank Act of 2010. Banks with $100 billion or more in total consolidated assets are subject to enhanced prudential standards, including higher capital buffers, annual stress tests, living wills, and resolution planning. As of 2025, the eight U.S. global systemically important banks, including JPMorgan Chase, Bank of America, Citigroup, Goldman Sachs, and Morgan Stanley, face additional capital surcharges based on their systemic risk score.

Sources

• https://www.federalreserve.gov/supervisionreg/large-financial-institutions.htm
• https://www.fdic.gov/regulations/applications/
• https://www.sec.gov/divisions/investment/iaregulation/iard.htm