Chapter 3: Bond Valuation & Interest Rate Risk

Bond Valuation & Interest Rate Risk establishes the foundational mechanics of bond pricing by explaining how financial managers utilize the present value formula to discount future cash flows—specifically the regular coupon payments and the final principal or face value repayment—at the market-required yield to maturity. A critical concept explored is the inverse relationship between interest rates and bond prices, where rising yields result in falling bond values. The text introduces sophisticated metrics like Macaulay duration and modified duration to measure a bond's sensitivity to interest rate fluctuations, demonstrating why long-term bonds generally exhibit greater price volatility than short-term securities. The discussion expands to the term structure of interest rates and the yield curve, differentiating between spot rates for single payments and the overall yield to maturity, while applying the Law of One Price to explain how arbitrage opportunities, such as those involving Treasury strips, maintain market equilibrium. Theories regarding the shape of the yield curve are analyzed, particularly the expectations theory, which suggests long-term rates reflect anticipated future short-term rates, alongside the impact of risk premiums. Furthermore, the distinction between real and nominal interest rates is clarified through the Fisher equation, illustrating how inflation erodes purchasing power and how investors can protect themselves using indexed bonds like Treasury Inflation-Protected Securities (TIPS). Finally, the chapter addresses the complexities of corporate debt, emphasizing default risk and the yield spread required to compensate investors for holding riskier assets compared to safe government Treasuries. This includes an overview of bond ratings from agencies like Moody's and Standard and Poor's, classifying issues into investment grade or speculative junk bonds, and briefly touches upon the nuances of sovereign debt defaults.