(a) required reserves held by the banking system
(b) total reserves held by the banking system,
(c) monetary base
(d) total money supply (M1)
(e) the money multiplier
Sol:
Required reserve ratio (rrd) = 10%
Excess reserves (ER) = $4 billion
Currency in circulation (CC) = $450 billion
Total amount of checkable deposits (CD) = $900 billion
(a) Required reserves held by the banking system (RR) = CD x rrd
Required reserves held by the banking system = $900 billion x 10% = $90 billion
b) Total reserves held by the banking system (TR) = RR + ER
Total reserves held by the banking system = $90 billion + $4 billion = $94 billion
c) Monetary base (MB) = CC + TR
Monetary base = $450 + $94 = $544 billion
d) Total money supply (M1) = CD + CC
Total money supply (M1) = $900 billion + $450 billion = $1,350 billion
(e) Money multiplier = M1 / MB
Money multiplier = $1,350 billion / S544 billion = 2.48
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