Answers and Solutions: 4 – 2
4-2 Interest rate risk is the risk that a bond’s price will decline due to an increase in interest
rates. Note, though, that if a bond is not callable, then its value will rise if rates fall, even
though the value will decline if rates rise. Reinvestment rate risk is the risk that the
income produced by a portfolio will decline due to a drop in interest rates as maturing
bonds (and coupon payments) are reinvested at the new, lower yield. Again, for non-
4-3 At the time a bond is issued, a sinking fund is considered good by investors, as it
shortens the effective maturity and also forces the company to plan for an orderly
retirement of the issue. So, other things held constant, a sinking fund bond will carry a
lower coupon than one without a sinking fund.
However, after the bond has been issued, complications arise. The effective time to
maturity is still shortened, and orderly retirement is still required, but if rates have fallen
and the bond has gone to a premium, a call will disadvantage those bondholders whose
bonds are called. (Generally, bonds are called by a lottery process administered by the