Money Multiplier

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Definition of 'Multiplier Effect'
The expansion of a country's money supply that results from banks being able to lend. The size of the multiplier effect depends on the percentage of deposits that banks are required to hold as reserves. In other words, it is money used to create more money and is calculated by dividing total bank deposits by the reserve requirement.

Investopedia explains 'Multiplier Effect'

The multiplier effect depends on the set reserve requirement. So, to calculate the impact of the multiplier effect on the money supply, we start with the amount banks initially take in through deposits and divide this by the reserve ratio. If, for example, the reserve requirement is 20%, for every $100 a customer deposits into a bank, $20 must be kept in reserve. However, the remaining $80 can be loaned out to other bank customers. This $80 is then deposited by these customers into another bank, which in turn must also keep 20%, or $16, in reserve but can lend out the remaining $64. This cycle continues - as more people deposit money and more banks continue lending it - until finally the $100 initially deposited creates a total of $500 ($100 / 0.2) in deposits. This creation of deposits is the multiplier effect.

The higher the reserve requirement, the tighter the money supply, which results in a lower multiplier effect for every dollar deposited. The lower the reserve requirement, the larger the money supply, which means more money is being created for every dollar deposite

Read more: http://www.investopedia.com/terms/m/multipliereffect.asp#ixzz1r8dNt1dC

Term high-powered money Definition: Also termed the monetary base, the total of currency held by the nonbank public, vault cash held by banks, and Federal Reserve deposits of the banks. This contains the monetary components over which the Federal Reserve System has relatively complete control and is often used as a guide for the Fed's money control ability and monetary policy. « Hierarchy of...
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