You are considering purchasing a $1,000 bond with a coupon rate of 9.5%, interest payable annually. You estimate that you will be able to sell the bond at $1,055 after 3 years.
a. If the current inflation rate is 5% per year, which will continue in the foreseeable future, what would be the real rate of return for your investment?
b. If you have determined an 8% inflation-free MARR, what should be the maximum inflation rate so that your investment would be successful?
A)Return on bond is same as it's coupon rate. So annual return given by this bond is 9.5%.
Also at the end of third year, bond will get sold at 1,055 or profit of $55.
So nominal return on investment is (1000 x 9.5% x 3 + 55)/ 1000 = (3 x 95 + 55)/ 1000 = (285+ 55)/1000 =340/1000 =. 34.0%
Since, inflation rate is 5% per year,. These retuns have to be discounted for inflation.
So real rate of return will be( 95/(1.05) + 95/(1.05)^2 +(95+55)/1.05^3 )/1000
= (90.48 + 86.17 +82.06 + 47.51)/1000 = 306.22/1000 = 30.622%.
B) Accepted Inflation free MARR is 8%. As annual return is 9.5%, after inflation adjustment it should not be less than 8%.
Let inflation be i%.
So 9.5%/(1+i%) should be ≥ 8%
Or (1+i%) should be ≤ 9.5%/8.0% or i% should be ≤ 9.5%/8.0% -1
Or i% should be ≤ 1.1875 - 1 = .1875 or 18.75%
Therefore, for successful investment, inflation should be less than 18.75%.
Thanks
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