Ans. Reserves, R = $15 million
Required reserve ratio, r = 0.25 or 25%
Currency with people, C = $5 million
Total Deposits, D = R/r = $60 million
Currency to deposit ratio, c = C/D = 5 million / 60 million =
0.08333 or 8.333%
Monetary base, MB = D + C = 60 million + 5 million = $65
million
Money multiplier, m = (1+c)/(c+r) = (1+0.0833)/(0.08333+0.25) = 3.25
=> Money supply = m*MB = 3.25*65 million = $211.25 million
When requiredreserve ratio is decreased to 20%, then,
New money multiplier, m' = (1+0.08333)/(0.08333+0.20) = 3.82
New money supply = m' * MB = 3.82 * 65 million = $248.53 million
Thus, money supply increases by $37.28 million
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