Commercial Banks

Commercial banks are the most common financial institutions in the United States, with total financial assets of about $13.5 trillion (85 percent of the total assets of the banking institutions). They generate profit not only by charging borrowers higher interest rates than they pay to savers but also by providing such services as check processing, trust- and retirement-account management, and electronic banking. The country’s 7,000 commercial banks range in size from very large (Bank of America, J.P. Morgan Chase) to very small (local community banks). Because of mergers and financial problems, the number of banks has declined significantly in recent years, but, by the same token, surviving banks have grown quite large. If you’ve been with one bank over the past ten years or so, you’ve probably seen the name change at least once or twice.

Savings Banks

Savings banks (also called thrift institutions and savings and loan associations, or S&Ls) were originally set up to encourage personal saving and provide mortgages to local home buyers. Today, however, they provide a range of services similar to those offered by commercial banks. Though not as dominant as commercial banks, they’re an important component of the industry, holding total financial assets of almost $1.5 trillion (10 percent of the total assets of the banking institutions). The largest S&L, Sovereign Bancorp, has close to 750 branches in nine Northeastern states. Savings banks can be owned by their depositors (mutual ownership) or by shareholders (stock ownership).

Credit Unions

To bank at a credit union, you must be linked to a particular group, such as employees of United Airlines, employees of the state of North Carolina, teachers in Pasadena, California, or current and former members of the U.S. Navy. Credit unions are owned by their members, who receive shares of their profits. They offer almost anything that a commercial bank or savings and loan does, including savings accounts, checking accounts, home and car loans, credit cards, and even some commercial loans. Collectively, they hold about $812 billion in financial assets (around 5 percent of the total assets of the financial institutions).

Finance Companies

Finance companies are nondeposit institutions because they do not accept deposits from individuals or provide traditional banking services, such as checking accounts. They do, however, make loans to individuals and businesses, using funds acquired by selling securities or borrowed from commercial banks. They hold about $1.9 trillion in assets. Those that lend money to businesses, such as General Electric Capital Corporation, are commercial finance companies, and those that make loans to individuals or issue credit cards, such a Citgroup, are consumer finance companies. Some, such as General Motors Acceptance Corporation, provide loans to both consumers (car buyers) and businesses (GM dealers).

Insurance Companies

Insurance companies sell protection against losses incurred by illness, disability, death, and property damage. To finance claims payments, they collect premiums from policyholders, which they invest in stocks, bonds, and other assets. They also use a portion of their funds to make loans to individuals, businesses, and government agencies.

Brokerage Firms

Companies like A.G. Edwards & Sons and T. Rowe Price, which buy and sell stocks, bonds, and other investments for clients, are brokerage firms (also called securities investment dealers). A mutual fund invests money from a pool of investors in stocks, bonds, and other securities. Investors become part owners of the fund. Mutual funds reduce risk by diversifying investment: because assets are invested in dozens of companies in a variety of industries, poor performance by some firms is usually offset by good performance by others. Mutual funds may be stock funds, bond funds, and money market funds, which invest in safe, highly liquid securities. (Liquidity is the speed with which an asset can be converted to cash.)

Finally, pension funds, which manage contributions made by participating employees and employers and provide members with retirement income, are also nondeposit institutions.

The Money Multiplier

Precisely how do banks expand the money supply? To find out, let’s pretend you win $10,000 at the blackjack tables of your local casino. You put your winnings into your savings account immediately. The bank will keep a fraction of your $10,000 in reserve; to keep matters simple, we’ll use 10 percent. The bank’s reserves, therefore, will increase by $1,000 ($10,000 × 0.10). It will then lend out the remaining $9,000. The borrowers (or the parties to whom they pay it out) will then deposit the $9,000 in their own banks. Like your bank, these banks will hold onto 10 percent of the money ($900) and lend out the remainder ($8,100). Now let’s go through the process one more time. The borrowers of the $8,100 (or, again, the parties to whom they pay it out) will put this amount into their banks, which will hold onto $810 and lend the remaining $7,290. As you can see in Figure 2, “The Effect of the Money Multiplier,” total bank deposits would now be $27,100. Eventually, bank deposits would increase to $100,000, bank reserves to $10,000, and loans to $90,000. A shortcut for arriving at these numbers depends on the concept of the money multiplier, which is determined using the following formula:

Money multiplier = 1/Reserve requirement

In our example, the money multiplier is 1/0.10 = 10. So your initial deposit of $10,000 expands into total deposits of $100,000 ($10,000 × 10), additional loans of $90,000 ($9,000 × 10), and increased bank reserves of $10,000 ($1,000 × 10). In reality, the multiplier will actually be less than 10. Why? Because some of the money loaned out will be held as currency and won’t make it back into the banks.