For the zero coupon bonds, the first year interest payment is the difference in the price of the
zero at the end of the year and the beginning of the year. The price of the zeroes in one year will
be:
The Year 1 interest deduction per bond will be this price minus the price at the beginning of the
year, which we found in part b, so:
The total cash flow for the zeroes will be the interest deduction for the year times the number of
zeroes sold, times the tax rate. The cash flow for the zeroes in Year 1 will be:
Notice the cash flow for the zeroes is a cash inflow. This is because of the tax deductibility of
the imputed interest expense. That is, the company gets to write off the interest expense for the
year even though the company did not have a cash flow for the interest expense. This reduces
the company’s tax liability, which is a cash inflow.
During the life of the bond, the zero generates cash inflows to the firm in the form of the
30. We found the maturity of a bond in Problem 25. However, in this case, the maturity is indeterminate.
31. We first need to find the real interest rate on the savings. Using the Fisher equation, the real interest
rate is:
(1 + R) = (1 + r)(1 + h)
Now we can use the future value of an annuity equation to find the annual deposit. Doing so, we
find:
FVA = C{[(1 + r)t – 1]/r}
Challenge
32. To find the capital gains yield and the current yield, we need to find the price of the bond. The
current price of Bond P and the price of Bond P in one year are: