an investor buys a $25,000 (face value) 20-year bond that pays 4% annual interest with quarterly payments for $23,700. the investor sells the bond after six years for $22,850.
A.) What yearly rate of return did the investor realize on the investment ( show percent to two decimals)
B.) Give both the nominal yearly rate and the actual effective year
Copupon payment = 4% * 25000 / 4 = 250
t = 6*4 = 24 quarter
Let IRR per quarter be i%, then
250*(P/A,i%,24) + 22850*(P/F,i%,24) = 23700
Dividing by 50
5*(P/A,i%,24) + 457*(P/F,i%,24) = 474
using trail and error method
When i = 0.75%, value of 5*(P/A,i%,24) + 457*(P/F,i%,24) = 5*21.889146 + 457*0.835831 = 491.420682
When i = 1%, value of 5*(P/A,i%,24) + 457*(P/F,i%,24) = 5*21.243387 + 457*0.787566 = 466.134656
using intepolation
i= 0.75% + (491.420682-474)/(491.420682-466.134656)*(1%-0.75%)
i = 0.75% + 0.17% = 0.92% per quarter
Nominal return per year = 0.92%*4 = 3.68%
Effective return per year = (1+0.0092)^4 - 1 = (1.0092)^4 - 1 = 0.03731 ~ 3.73%
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