In: Finance
a. What is the duration of a 5-year 8% annual coupon bond with a par value of $100 if the prevailing continuously compounded interest rate is 10%?
b. What is the duration of a 5-year 12% annual coupon bond with a par value of $100 if the prevailing continuously compounded interest rate is 10%? What does this tell you about the relationship between coupon rates and duration? Comment.
c. What is the duration of a 5-year 8% annual coupon bond with a par value of $100 if the prevailing continuously compounded interest rate is 12%? What does this tell you about the relationship between interest rates and duration? Comment.
2a.
Year | CF | PVF@10% | Disc CF | Weights | Weights * Year |
1 | $ 8.00 | 0.9048 | $ 7.24 | 0.0799 | 0.0799 |
2 | $ 8.00 | 0.8187 | $ 6.55 | 0.0723 | 0.1446 |
3 | $ 8.00 | 0.7408 | $ 5.93 | 0.0654 | 0.1963 |
4 | $ 8.00 | 0.6703 | $ 5.36 | 0.0592 | 0.2368 |
5 | $ 8.00 | 0.6065 | $ 4.85 | 0.0536 | 0.2678 |
5 | $ 100.00 | 0.6065 | $ 60.65 | 0.6696 | 3.3479 |
Duration | 4.2734 |
2b
Year | CF | PVF@10% | Disc CF | Weights | Weights * Year |
1 | $ 12.00 | 0.9048 | $ 10.86 | 0.1029 | 0.1029 |
2 | $ 12.00 | 0.8187 | $ 9.82 | 0.0931 | 0.1862 |
3 | $ 12.00 | 0.7408 | $ 8.89 | 0.0842 | 0.2527 |
4 | $ 12.00 | 0.6703 | $ 8.04 | 0.0762 | 0.3048 |
5 | $ 12.00 | 0.6065 | $ 7.28 | 0.0690 | 0.3448 |
5 | $ 100.00 | 0.6065 | $ 60.65 | 0.5746 | 2.8732 |
Duration | 4.0646 |
If the coupon rates increases the duration of the bond decreases
Year | CF | PVF@12% | Disc CF | Weights | Weights * Year |
1 | $ 8.00 | 0.8869 | $ 7.10 | 0.0853 | 0.0853 |
2 | $ 8.00 | 0.7866 | $ 6.29 | 0.0756 | 0.1513 |
3 | $ 8.00 | 0.6977 | $ 5.58 | 0.0671 | 0.2013 |
4 | $ 8.00 | 0.6188 | $ 4.95 | 0.0595 | 0.2380 |
5 | $ 8.00 | 0.5488 | $ 4.39 | 0.0528 | 0.2639 |
5 | $ 100.00 | 0.5488 | $ 54.88 | 0.6597 | 3.2985 |
Duration | 4.2382 |
If the Interest rate increases the duration of the bond decreases