Question

Assume we know that D = 900 r = 10% C = 500 ER = 7...

Assume we know that

D = 900

r = 10%

C = 500

ER = 7

If the Fed buys $350 worth of securities by how much will the overall money supply increase in the economy?

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Answer #1

The change in money supply can be calculated as:

Change in Money Supply = Money Multiplier (M1) x Change in Monetary Base

Here, Change in Monetary Base = $ 350 .....Given

We need to calculate the Money Multiplier using the below mentioned formula:

M1 = [1 + (C/D)] / (R + ER/D + C/D)

Where, C = Currency in Circulation = 500 .....Given

R = Reserve Ratio = 10% .....Given

D = Deposits = 900 .....Given

ER = Excess Reserves = 7 .....Given

Using this formula and the values mentioned above, lets calculate M1

M1 = [1 + (500/900)] / (10% + 7/900 + 500/900)

M1 = [1+0.55] / (0.1 + 0.0077 + 0.55)

M1 = 1.55 / 0.6633

M1 = 2.345

Using this, M1 & the Change in Monetary Base given as $350, we can calculate the change in Monetary Supply.

Change in Money Supply = Money Multiplier (M1) x Change in Monetary Base

Change in Money Supply = 2.345 x 350

Change in Money Supply = $820.77 ....Answer

Overall money supply increase in the economy is $820.77.

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