Published by the Federal Reserve Bank of Chicago
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Intrinsically, a dollarbill is just a piece of paper, deposits merely book entries.
What, then, makes these instruments - checks,paper money, and coins- acceptable at face value in payment of all debts and for other monetary uses? Mainly, it is the confidence people have that they will be able to exchange such money for other financial assets and for real goods and services whenever they choose to do so.
Then, bankers discovered that they could make loansmerely by giving their promises to pay, or bank notes, to borrowers. In this way, banks began to create money.
Transaction deposits are the modem counterpart ofbank notes. It was a small step from printing notes to making book entries crediting deposits of borrowers, which the borrowers in turn could "spend" by writing checks, thereby "printing" their own money.
Ofcourse, they do not really pay out loans from the money they receive as deposits. If they did this, no additional money would be created. What they do when they make loans is to accept promissory notes in exchange for credits to the borrowers' transaction accounts. Loans (assets) and deposits (liabilities) both rise by $9,000. Reserves are unchanged by the loan transactions. But the deposit credits constitute new additions to the total deposits of the banking system.
Loans are made by crediting the borrower's deposit account, i.e., by creating additional deposit money.