Chapter 6
Interest Rates and Bond Valuation
Instructor’s Resources
Chapter Overview
This chapter introduces interest-rate and bond-market fundamentals, beginning with the distinction between
nominal and real interest rates and the role of expected inflation in linking the two. Risk premia are added to
highlight components of the nominal return on a risky security, namely the (i) real risk-free rate, (ii) expected
inflation rate, and (iii) risk premium on the security. Next, the discussion turns to the relationship between the
nominal interest rate on a bond and its term to maturity—formally referred to as the term structure of interest
rates and represented pictorially by the yield curve. The exposition notes the general upward slope of the yield
curve—that is, that long-term interest rates tend to exceed short-term rates—and offers three explanations: (a)
expectations about future short-term rates, (ii) general investor preference for short-term, liquid debt, and (iii)
segmentation of short- and long-term debt markets. The focus then moves to bond-market institutions with a
catalogue of the major types of issues along with their legal issues, risk characteristics, and indenture provisions.
The role of rating agencies is also emphasized. The chapter concludes by presenting the basic model for bond
valuation as a special case of the general model for valuing assets (i.e., value is simply the present value of
expected cash flows from the asset). Examples are provided of the impact of variation in coupon/principal
payments, timing of coupon/principal payments, and required rates of return on the market price of a bond. The
final topic is yield to maturity—explained as nothing more than the interest rate equating the present value of a
bond’s remaining coupons and principal payments with its market price.
Suggested Answers to Opener-in-Review
Assume the bonds Aston Martin issued in 2017 pay interest semiannually.
a. How much cash would a bondholder receive every 6 months if the bonds have a coupon rate of 5.75%?
The bonds pay 5.75%2 or 0.02875 semiannually. Although not stated explicitly in the problem, par value of
b. When Austin Martin issued the bonds, maturity was 20 years, and the required return was 6% per year.
What was the market price? Did the bond sell at par, at a premium, or at a discount? Why?
Market price of the bond (given 40 semiannual coupon payments of $28.75, a $1,000 principal payment at
the market rate rises above the coupon rate, bond price falls until yield-to-maturity equals the market rate.
c. Given your answer to part b, what was the current yield of Aston Martin bonds when they were first issued?
Suppose the bonds are now worth $1,075 each. What is the current yield on the bonds now?
Current yield = Bond’s annual interest payment Current price