Characteristics of Money

For money to be a suitable means of exchange, it should have these key characteristics:

• Scarcity: Money should be scarce enough to have some value but not so scarce as to be unavailable. Pebbles, which meet some of the other criteria, would not work well as money because they are widely available. Too much money in circulation increases prices and inflation. Governments control the scarcity of money by limiting the quantity of money in circulation.
• Durability: Any item used as money must be durable. A perishable item such as a banana becomes useless as money when it spoils. Even early societies used durable forms of money, such as metal coins and paper money, which lasted for a long time.
• Portability: Money must be easily moved around. Large or bulky items, such as boulders or heavy gold bars, cannot be transported easily from place to place.
• Divisibility: Money must be capable of being divided into smaller parts. Divisible forms of money help make transactions of all sizes and amounts possible.

(Figure) provides some interesting facts about our money.

Functions of Money

Using a variety of items as money would be confusing. Thus, societies develop a uniform money system to measure the value of goods and services. For money to be acceptable, it must function as a medium of exchange, as a standard of value, and as a store of value.

As a medium of exchange, money makes transactions easier. Having a common form of payment is much less complicated than having a barter system, wherein goods and services are exchanged for other goods and services. Money allows the exchange of products to be a simple process.

Money also serves as a standard of value. With a form of money whose value is accepted by all, goods and services can be priced in standard units. This makes it easy to measure the value of products and allows transactions to be recorded in consistent terms.

As a store of value, money is used to hold wealth. It retains its value over time, although it may lose some of its purchasing power due to inflation. Individuals may choose to keep their money for future use rather than exchange it today for other types of products or assets.

The U.S. Money Supply

The U.S. money supply is composed of currency, demand deposits, and time deposits. Currency is cash held in the form of coins and paper money. Other forms of currency include travelers’ checks, cashier’s checks, and money orders. The amount of currency in circulation depends on public demand. Domestic demand is influenced primarily by prices for goods and services, income levels, and the availability of alternative payment methods such as credit cards. Until the mid-1980s, nearly all U.S. currency circulated only domestically. Today domestic circulation totals only a small fraction of the total amount of U.S. currency in circulation.

Over the past decade, the amount of U.S. currency has doubled to more than $1.56 trillion and is held both inside and outside the country.^[1] Foreign demand is influenced by the political and economic uncertainties associated with some foreign currencies, and recent estimates suggest that between one-half and two-thirds of the value of currency in circulation is held abroad. Some residents of foreign countries hold dollars as a store of value, whereas others use it as a medium of exchange.

Federal Reserve notes make up more than 99 percent of all U.S. currency in circulation. Each year the Federal Reserve Board determines new currency demand and submits a print order to the Treasury’s Bureau of Engraving and Printing (BEP). The order represents the Federal Reserve System’s estimate of the amount of currency the public will need in the upcoming year and reflects estimated changes in currency usage and destruction rates of unfit currency. (Figure) shows how long we can expect our money to last on average.

Demand deposits consist of money kept in checking accounts that can be withdrawn by depositors on demand. Demand deposits include regular checking accounts as well as interest-bearing and other special types of checking accounts. Time deposits are deposits at a bank or other financial institution that pay interest but cannot be withdrawn on demand. Examples are certain savings accounts, money market deposit accounts, and certificates of deposit. Economists use two terms to report on and discuss trends in the U.S. monetary system: M1 and M2. M1 (the M stands for money) is used to describe the total amount of readily available money in the system and includes currency and demand deposits. As of August 2017, the M1 monetary supply was $3.5 trillion. M2 includes all M1 monies plus time deposits and other money that is not immediately accessible. In August 2017, the M2 monetary supply was $13.6 trillion.^[2]

Credit cards, sometimes referred to as “plastic money,” are routinely used as a substitute for cash and checks. Credit cards are not money; they are a form of borrowing. When a bank issues a credit card to a consumer, it gives a short-term loan to the consumer by directly paying the seller for the consumer’s purchases. The consumer pays the credit card company after receiving the monthly statement. Credit cards do not replace money; they simply defer payment.

Summary of Learning Outcomes