Question

In: Finance

Derive the duration of a 3 year semiannual paying 8% bond, when market rates are 10%...


Derive the duration of a 3 year semiannual paying 8% bond, when market rates are 10% annually.
Explicate the concept of duration.

Solutions

Expert Solution

Here interest = Face value x coupon rate x 1/2

=1000 x 8% x 1/2

=40$

n = no of payments = 3 x 2 =6

market rate = 10%/2 = 5%

Statement showing duration of bond

n Cash flow PVIF @ 5% PV Weight of PV to total of PV Duration
A B C D = B x C E F = A x E
1 40 0.9524 38.10 0.0401 0.04
2 40 0.9070 36.28 0.0382 0.08
3 40 0.8638 34.55 0.0364 0.11
4 40 0.8227 32.91 0.0347 0.14
5 40 0.7835 31.34 0.0330 0.17
6 1040 0.7462 776.06 0.8176 4.91
949.24 5.43

Thus duration of bond = 5.43/2

=2.72 years

Duration of bond measures in how much time bond will repay it's price to investor. Duration is often confused with term of maturity , but both are different. Term of maturity is nothing but the life of the bond . ie 3 years in our case where as duration shows the period in which investor will be paid his investment. Further Duration is sensitive to interest rate changes, it is measure of sensitivity of bond's price to change in interest rates.


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