Answer:
In order to increase money supply by $200 ,Fed would have to buy U.S government bonds worth of $50
Step-by-step explanation:
Initially:
Reserve requirement = 10% or 0.10
Simple money multiplier = 1/RR = 1/0.10 = 10
Increase in money supply = Increase in total reserves* Simple money multiplier
Increase in money supply is $200
$200=increase in total reserves *10
increase in total reserves=$200/10
=$20
However, since the the the percentage of deposits held as reserves has increased to 25%,the amount Fed would need to invest in U.S government bonds would increase accordingly:
reserve requirement=25% or 0.25
Simple money multiplier =1/IRR=1/0.25=4
crease in money supply = Increase in total reserves* Simple money multiplier
Increase in money supply is $200
$200=increase in total reserves *4
increase in total reserves=$200/4
=$50
Increase in total reserves of $50 implies that Fed has to make $50 to the banks under it by buying U.S government of $50