Money Multiplier

Mathematical relationship between the monetary base and money supply of an economy. It explains the increase in the amount of cash in circulation generated by the banks’ ability to lend money out of their depositors’ funds. When a bank makes a loan, it ‘creates’ money because the loan becomes a new deposit from which the borrower can withdraw cash to spend. This money-creating power is based on the fractional reserve system under which banks are required to keep at hand only a portion (between 10 to 15 percent, typically 12 percent) of the depositors’ funds. The rest may be converted into loans, thereby increasing the available cash by a factor that is a multiple of the initial deposit.

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