Consider a mortgage with an initial principal value of $1,000,000. It will make yearly payments for 3 years after which it will be paid off. The annual interest rate is 5%. Take the annual payment to amortize from the loan (you must compute this) and construct a CMO. That is, construct three annual coupon bonds paying an annual coupon rate of 5% with maturities of one, two and three years. What will be the face value of each bond (hint, each will be different).
The annual Payment (A) for the mortgage is given by
A/0.05*(1-1/1.05^3) = 1000000
=> A = $367208.56
So , the mortgage pays $367208.56 at the end of each year
For the CMO, the 3 year bond will pay 5% + 100% of Face value at the end of year 3 i.e. 105% at the end of year 3
So, 105% of Face value of 3 year bond =$367208.56
Face value of 3 year bond = 367208.56/1.05 = $349722.44
At the end of 2 years , one gets 5% of FV of 3 year bond + 105% of FV of 2 year bond
=> 349722.44*0.05+105%*FV of 2 year bond =367208.56
FV of 2 year bond = $333068.99
At the end of 1 year , one gets 5% of FV of 3 year bond + 5% of FV of 2 year bond+105% of FV of 1 year bond
=> 349722.44*0.05+333068.99*0.05+ 105%*FV of 1 year bond =367208.56
FV of 1 year bond = $317208.56
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