Monday, June 14, 2010

Fractional-Reserve Banking

Suppose a teenager, Bill, is rummaging in the attic and finds $1,000 in physical currency in an old chest. Bill is ecstatic and runs to the local bank, where he opens a checking account and deposits the green pieces of paper.

Under a 100-percent-reserve banking system, this would be the end of the story. In the act of making the deposit, Bill's currency holdings would fall by $1,000, while his checkbook balance would rise by $1,000. Putting the money in the bank wouldn't affect the total amount of money in the economy.

However, in our current system, Bill's bank would see a new profit opportunity. After the bank put the $1,000 of paper currency into its vault, its reserves would be that much higher, while its outstanding deposit liabilities would have risen by $1,000 as well (in the form of Bill's new checking account). But since banks in the United States are subject only to a reserve requirement of (approximately) 10 percent, the bank would have new excess reserves of $900. If it found a suitable borrower, the bank would have the legal ability to grant a new loan for this amount.


Why Fractional-Reserve Banking Is Just Plain Weird


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