MONEY CREATION WITH ‘FRACTIONAL RESERVE BANKING
Eventually, the bankers at First National Bank may start to reconsider their policy of lOO- percent-reserve banking. Leaving all that money idle in their vaults seems unnecessary. Why not lend some of it out and earn a profit by charging interest on the loans? Families buying houses, firms building new factories, and students paying for college would all be happy to pay interest to borrow some of that money for a while. First National Bank has to keep some reserves so that currency is available if depositors want to make withdrawals. But if the flow of new deposits is roughly the same as the flow of withdrawals, First National needs to keep only a fraction of its deposits in reserve. Thus, First National adopts a system called fractional-reserve banking. The fraction of total deposits that a holds as reserves is called the reserve ratio. This ratio is determined by a combination of government regulation and bank policy. As we discuss more fully later in the chapter, the Fed sets a minimum amount of reserves that banks must hold. called a reserve requirement. In addition, banks may hold reserves above the legal minimum, called excess reserves, so they can be more confident that they will not run short of cash. For our purpose here, we take the reserve ratio as given to examine what fractional-reserve banking means for the money supply. Let’s suppose that First National has a reserve ratio of 10 percent. This means that it keeps 10 percent of its deposits in reserve and loans out the rest. Now let’s look again at the bank’s T-account:
First National still has $100 in liabilities because making the loans did not alter the bank’s obligation to its depositors. But now the bank has two kinds of assets: It has $10 of reserves in its vault, and it has loans of $90. (These loans are liabilities of the people taking out the loans, but they are assets of the bank making the loans because the borrowers will later repay the bank.) In total, First National’s assets still equal its liabilities Once again consider the supply of money in the economy. Before First National makes any loans, the money supply is the $100 of deposits in the bank. Yet when First National makes these loans, the money supply increases. The depositors still have demand deposits totaling $100, but now the borrowers hold $90 in currency. The money supply (which equals currency plus demand deposits) equals $190. Thus, when banks hold only a fraction of deposits in reserve, banks create money. At first, this creation of money by fractional-reserve banking may seem too good to be true because it appears that the bank has created money out of thin air. To make this creation of money seem less miraculous, note that when First National Bank loans out some of its reserves and creates money, it does not create any wealth. Loans from First National give the borrowers some currency and thus the ability to buy goods and services. Yet the borrowers are also taking on debts, so the loans do not make them any richer. In other words, as a bank creates the asset of money, it also creates a corresponding liability for its borrowers. At the end of this process of money creation, the economy is more liquid in the sense that there is more of the medium of exchange, but the economy is no wealthier than before .
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