
Ann Logue (rhymes with vogue) is a writer specializing in business and finance. She is the author of five books on investing, including Hedge Funds for Dummies and Day Trading for Dummies, and publishes a Substack newsletter called “The Whatever Years.”
She has worked for several fintech startups as a consultant, employee, and investor. She has also served as a Fulbright grantee and holds the Chartered Financial Analyst designation.
Doug is a Chartered Alternative Investment Analyst who spent more than 20 years as a derivatives market maker and asset manager before “reincarnating” as a financial media professional a decade ago.
Before joining Britannica, Doug spent nearly six years managing content marketing projects for a dozen clients, including The Ticker Tape, TD Ameritrade’s market news and financial education site for retail investors. He has been a CAIA charter holder since 2006, and also held a Series 3 license during his years as a derivatives specialist.
Doug previously served as Regional Director for the Chicago region of PRMIA, the Professional Risk Managers’ International Association, and he also served as editor of Intelligent Risk, PRMIA’s quarterly member newsletter. He holds a BS from the University of Illinois at Urbana-Champaign and an MBA from Illinois Institute of Technology, Stuart School of Business.

Banks are financial intermediaries that collect money from people who have excess funds and use it to provide loans and financing to individuals, businesses, and governments. They also help customers conduct financial transactions, often through an affiliated broker-dealer and/or wealth management division.
Broadly speaking, banks in the United States fall into two categories: commercial banks and investment banks. Commercial banks offer savings, checking, and lending services, and they are usually regulated by the Office of the Comptroller of the Currency (OCC). Investment banks help corporations and governments raise money through stocks and bonds, and they are usually regulated by the Securities and Exchange Commission (SEC).
Banks that are part of the Federal Deposit Insurance Corporation (FDIC) system pay premiums into the FDIC. In return, the FDIC insures depositors up to $250,000 in the case of a bank failure. The Federal Reserve also has regulatory oversight duties for banks as well as ânonbank financial intermediaries.â The Fed is responsible for checking and maintaining the overall safety and soundness of the banking system. It conducts audits and stress tests designed to ensure the entire financial ecosystem is prepared for a potential crisis.
Commercial banks are the most common type of banks. They serve businesses and consumers in two ways:
Although there are many similarities between banks and credit unions, there are a few key differences, including the regulator (FDIC or NCUA), ownership structure, product and service availability, and interest rates. Compare banks and credit unions.
The largest commercial banks are known as money center banks. These operate in such global financial capitals as New York, London, and Tokyo. Money center banks provide a wide range of financial services, including commercial banking, investment banking, asset management, and international banking. Money center banks typically have extensive international operations and serve multinational corporations, governments, and institutional clients such as hedge funds, private equity groups, and venture capitalists.
When we think of money center banks in the United States, four names come to mind: JPMorgan Chase (JPM), Bank of America (BAC), Citi (C), and Wells Fargo (WFC). Two large legacy investment banks, Goldman Sachs (GS) and Morgan Stanley (MS), were granted banking charters during the financial crisis of 2008 and now have commercial banking arms.
Globally, the top four banks in terms of assets are majority-owned by the Chinese government. The so-called âChina big fourâ include the Industrial and Commercial Bank of China (ICBC), the China Construction Bank (CCB), the Agricultural Bank of China (ABC), and the Bank of China (BoC). Learn more about Chinaâs financial sector.
Investment banks are financial institutions that work with large investors, corporations, and governments. They work in the capital markets (primarily stocks and bonds) to connect investors to companies and governments that need to raise money. They also provide corporations with advisory services on corporate strategy, mergers, and acquisitions.
Many investment banks also have broker-dealer operations, meaning they buy and sell securities on behalf of customers (many of them institutional clients), as well as for the bankâs own account.
In the United States, the primary regulator for investment banks is the SEC, but some investment banking activities fall under other regulators, such as the Federal Reserve System. Some investment banks also hold commercial banking charters, so they are subject to those regulations as well.
Many nonfinancial organizations that connect people with a surplus and people with a need call themselves banks, such as food banks and blood banks. But there are two more categories of organizations that use the word âbankâ and operate in the financial system:
On a simple level, banks connect people who have assets to lend with people who need to borrow assets to fund purchasesâfrom mortgages and auto loans to multibillion-dollar strategic acquisitions. In the United States, commercial banks collect deposits and issue loans, while investment banks facilitate capital formation and other financial transactions.
Both are critical to the growth and functioning of a market-based economy.