Real and nominal rates interest Zane Perelli currently has $100 that he can spend today on polo shirts costing $ 25 each. Alternatively, he could invest the $100 in a risk-free U.S. Treasury security that is expected to earn a 12% nominal rate of interest. The consensus forecast of leading economists is a 4% rate of inflation over the coming year. a. How many polo shirts can Zane purchase today?
b. How much money will Zane have at the end of 1 year if he forgoes purchasing the polo shirts today? (Ignore taxes.)
c. How much would you expect the polo shirts to cost at the end of 1 year in light of the expected inflation?
d. Use your findings in parts b and c to determine how many polo shirts (fractions are OK) Zane can purchase at the end of 1 year. In percentage terms, how many more or fewer polo shirts can Zane buy at the end of 1 year?
e. What is Zane's real rate of return over the year? How is it related to the percentage change in Zane's buying power found in part d? Explain.
a. Zane has $100 with him. As each Polo shirt costs $25, hence 100/25 = 4. So Zane can purchase 4 polo shirts today.
b. The interest rate is 12% and hence on $100 Zane will earn (100*1*12)/100 = $12 in an year. So if Zane does not buy shirts and invests in the Treasury bills he wil get $112 = $100 + $12 = $112.
c. As the expected inflation is 4%, hence the cost of Polo shirt will increase by 4% in the next year. So that cost will be, $25 + (4*25)/100 = 25 + 1 = $26. Hence the Polo shirt will cost $26 after one year.
d. After one year Zane will have $112 with him and $26 is the cost of each Polo shirt. This is given Zane will invest the $100 into the Treasury bills. So, after one year, Zane will be able to buy 112/26 = 4.31 shirts.
e. Zane's real rate of return is 12% - 4% = 8%. Zane's buying power has increased by 8% due to the above calculation given which Zane can afford more shirts.
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