Investment banks move large sums of money between institutions and companies, not between individuals and banks
An investment bank is a financial institution that handles money and securities for corporations, governments, and other large organizations—not for individual customers like you. While a regular bank takes your deposit, holds it in an account, and lends it out, an investment bank arranges deals, underwrites stock and bond offerings, trades securities, and advises on mergers and acquisitions. The money flowing through an investment bank is usually in the millions or billions, and the transactions are between institutions, not between a bank and a person.
The key difference shows up in what each type of bank does with money. A commercial bank (the kind you use) collects deposits from many people, pays interest on savings accounts, and makes loans to individuals and small businesses. An investment bank does not take deposits from regular customers. Instead, it earns money by charging fees for arranging deals, taking a percentage of securities sold, and profiting from trading on its own account.
In the United States, the Glass-Steagall Act of 1933 originally separated commercial and investment banking to prevent conflicts of interest. That law was repealed in 1999, which is why today most large banks operate both divisions under one holding company—JPMorgan Chase, Bank of America, and Goldman Sachs all run investment banking arms alongside their consumer banking operations. The two sides operate separately, with different rules, different clients, and different revenue streams.
Key Takeaways
- Investment banks serve corporations and governments, not individual depositors, and they do not offer checking accounts or savings accounts.
- Investment banks earn money through fees on deals, underwriting securities, and trading, rather than through interest on deposits.
- Large banks today often have both a commercial division (for regular customers) and an investment banking division (for large institutions).
- Investment banking activities include arranging mergers, issuing stocks and bonds, and advising on major financial transactions.
- Your money in a regular bank account is protected by FDIC insurance; investment banking operations are not covered by that protection.
What investment banks actually do
Investment banks handle four main categories of work. Underwriting means the bank buys newly issued stocks or bonds from a company and then sells them to investors—the bank takes the risk that it will not sell them all. Mergers and acquisitions advisory means the bank advises one company on buying another, values the target company, and negotiates the deal. TradingResearch and sales
A single transaction can involve all four. When a company wants to go public (issue stock for the first time), it hires an investment bank to underwrite the offering. The bank's research team writes reports on the company. The bank's sales team sells shares to large institutional investors. The bank's trading desk may buy and sell shares in the open market to stabilize the price. The bank collects fees at each step.
How investment banks differ from commercial banks in structure and regulation
A commercial bank (your regular bank) is regulated primarily by the Federal Reserve, the Office of the Comptroller of the Currency (OCC), and the Federal Deposit Insurance Corporation (FDIC). The FDIC insures deposits up to $250,000 per account holder per bank, which is why your money is protected if the bank fails. Investment banks are regulated by the Securities and Exchange Commission (SEC) and the Financial Industry Regulatory Authority (FINRA), not by the FDIC. If an investment bank fails, there is no deposit insurance protecting client funds in the same way.
Commercial banks must maintain capital reserves (money they hold in case of losses) set by federal regulators. Investment banks also must maintain capital reserves, but the rules are different and often stricter because the risks are different. A commercial bank's main risk is that borrowers will not repay loans. An investment bank's main risk is that the value of securities it holds will drop suddenly, or that it will not be able to sell securities it has underwritten.
The business model also differs in how money moves. A commercial bank profits when the interest rate it pays on deposits is lower than the interest rate it charges on loans. An investment bank profits when it charges fees for services and when the value of securities it trades increases. This means an investment bank's profits are tied directly to market activity and deal flow, while a commercial bank's profits are more stable and predictable.
Why investment banks matter to the broader financial system
Investment banks are the infrastructure that allows large companies and governments to raise money. When a corporation needs to borrow $500 million, it does not go to a commercial bank—the loan would be too large and too risky for one bank to handle alone. Instead, it works with an investment bank, which arranges a syndicate of lenders or issues bonds that investors buy. Without investment banks, companies could not finance major expansions, acquisitions, or operations at the scale they do.
Investment banks also provide liquidity to markets, meaning they buy and sell securities constantly, which makes it easier for other investors to buy and sell. When you own stock in a public company, you can sell it quickly because investment banks and other traders are always ready to buy or sell. Without that constant trading activity, stock markets would be much less liquid and much riskier for individual investors.
The 2008 financial crisis showed how interconnected investment banks are to the broader economy. When large investment banks like Lehman Brothers failed, it triggered a cascade of losses across the financial system because so many other institutions had lent them money or held their securities. That event led to stricter regulations on investment banks, including higher capital requirements and stress tests that simulate market crashes.
How investment banks interact with regular customers (if at all)
Most individual people never interact directly with an investment bank. You may own mutual funds or stocks that an investment bank trades, or you may have a retirement account that holds bonds an investment bank underwrote, but you are not a client of the investment bank. The investment bank does not know you exist.
However, if you work for a large corporation, your company's 401(k) plan may be managed by the investment banking division of a large bank. If you have a very high net worth (usually $1 million or more in investable assets), you may have access to private wealth management services offered by investment banks, where advisors help you manage your portfolio. But these are exceptions. The core business of investment banking is serving institutions, not individuals.
If you bank at a large institution like JPMorgan Chase or Bank of America, you are using the commercial banking side. That side takes your deposits, offers you a checking account, and lends you money for a mortgage or car loan. The investment banking side of the same company is a completely separate operation serving Fortune 500 companies and governments.
The difference between investment banks and other financial institutions
Investment banks are often confused with other types of financial firms. A brokerage is a firm that buys and sells securities on behalf of clients (including individual investors) and charges a commission. A hedge fund is a private investment fund that pools money from wealthy investors and tries to generate high returns through aggressive trading and complex strategies. A private equity firm buys companies, improves them, and sells them for a profit. A mutual fund company pools money from many investors and buys a diversified portfolio of stocks or bonds.
Investment banks do some of what these firms do (trading, advising on investments), but they also do things none of them do (underwriting securities, arranging mergers). The key distinction is that investment banks are primarily advisors and intermediaries for large institutions, while brokerages, hedge funds, and mutual funds are primarily investment managers or traders using their own capital or client capital.
Frequently Asked Questions
Can I open an account at an investment bank?
No. Investment banks do not offer checking accounts, savings accounts, or deposit accounts to individuals. If you want to open an account, you need a commercial bank. Large investment banks may offer wealth management services to very high-net-worth individuals, but that is different from a regular bank account.
Is my money safe at an investment bank?
Investment banks are not covered by FDIC deposit insurance because they do not take deposits from individuals. If you hold securities (stocks, bonds) through an investment bank, those are protected by SIPC (Securities Investor Protection Corporation) insurance up to $500,000 per account, but only against the firm's failure to return your securities—not against losses from market declines.
Why do investment banks charge such high fees?
Investment banks charge high fees because they handle very large transactions (often millions or billions of dollars), employ highly specialized staff, and take on significant risk. A 1% fee on a $100 million deal is $1 million, which sounds large but reflects the complexity and risk involved. Clients pay these fees because the bank's expertise and access to capital markets saves them money overall.
Do I need to worry about investment banks failing?
Investment bank failures can affect the broader economy (as happened in 2008), but they do not directly affect your personal bank account unless you hold money or securities at that bank. If you use a commercial bank for your checking and savings, your deposits are FDIC-insured regardless of what happens to investment banking operations.
What is the difference between an investment bank and a commercial bank?
A commercial bank takes deposits from individuals, offers checking and savings accounts, and makes loans to people and small businesses. An investment bank does not take deposits and does not serve individual customers; instead, it arranges large financial deals, underwrites securities, and trades for institutions. Many large banks operate both divisions separately.