1. Total book value of debt: 684600
2.Total market value of debt: 79.25
3. After-tax cost of the 5.9% coupon bond: 0.0033
4. After-tax cost of the zero coupon bond: 0.00112
5. After-tax cost of debt: 0.00224.
To solve this problem, we will first find the values of the bonds and then calculate the after-tax costs of the bonds.
Face value of the 5.9% coupon bond:
FV = 1000000 * (1 - y^n)
FV = 100000 * (1 - (0.059 * 7)^9)
FV = 100000 * (1 - (0.059 * 532.1)
FV = 100000 * (1 - 31.64)
FV = 100000 * 0.6836
FV = 683600
Face value of the zero coupon bond:
FV_z = 100000 * (1 - y^n)
FV_z = 100000 * (1 - (0.000 * 11)^11)
FV_z = 100000 * (1 - 0.000)
FV_z = 100000 * 0.000
FV_z = 100
Total book value of debt:
TBV = FV + FV_z
TBV = 683600 + 100
TBV = 684600
Total market value of debt:
TMV = PV * (1 - t)
TMV = 107.7 * (1 - 0.25)
TMV = 107.7 * 0.75
TMV = 79.25
After-tax cost of the 5.9% coupon bond:
ATC = (C / FV) * (1 - T)
ATC = (30 / 683600) * (1 - 0.25)
ATC = 0.00445 * 0.75
ATC = 0.0033
After-tax cost of the zero coupon bond:
ATC_z = (PV_z / FV_z) * (1 - T)
ATC_z = (100 / 683600) * (1 - 0.25)
ATC_z = 0.000156 * 0.75
ATC_z = 0.00112
After-tax cost of debt:
ATC_d = (ATC + ATC_z) / 2
ATC_d = (0.0033 + 0.00112) / 2
ATC_d = 0.00224
In summary:
Total book value of debt: 684600
Total market value of debt: 79.25
After-tax cost of the 5.9% coupon bond: 0.0033
After-tax cost of the zero coupon bond: 0.00112
After-tax cost of debt: 0.00224