1. ©2007, The McGraw-Hill Companies, All Rights Reserved 3-1 McGraw-Hill/Irwin Chapter Three Interest Rates and Security Valuation

2. ©2007, The McGraw-Hill Companies, All Rights Reserved 3-2 McGraw-Hill/Irwin Various Interest Rate Measures Coupon rate Required Rate of Return Expected rate of return Realized Rate of Return Coupon rate Required Rate of Return Expected rate of return Realized Rate of Return

3. ©2007, The McGraw-Hill Companies, All Rights Reserved 3-3 McGraw-Hill/Irwin Required Rate of Return ~ ~ ~ ~ FPV = CF 1 + CF 2 + CF 3 + … + CF n (1 + rrr) 1 (1 + rrr) 2 (1 + rrr) 3 (1 + rrr) n Where: rrr = Required rate of return CF 1 = Cash flow projected in period t (t = 1, …, n) ~ = Indicates that projected cash flow is uncertain (due to default and other risks) n = Number of periods in the investment horizon ~ ~ ~ ~ FPV = CF 1 + CF 2 + CF 3 + … + CF n (1 + rrr) 1 (1 + rrr) 2 (1 + rrr) 3 (1 + rrr) n Where: rrr = Required rate of return CF 1 = Cash flow projected in period t (t = 1, …, n) ~ = Indicates that projected cash flow is uncertain (due to default and other risks) n = Number of periods in the investment horizon

4. ©2007, The McGraw-Hill Companies, All Rights Reserved 3-4 McGraw-Hill/Irwin Expected Rate of Return ~ ~ ~ ~ P = CF 1 + CF 2 + CF 3 + … + CF n (1 + Err) 1 (1 + Err) 2 (1 + Err) 3 (1 + Err) n Where: Err = Expected rate of return CF 1 = Cash flow projected in period t (t = 1, …, n) ~ = Indicates that projected cash flow is uncertain (due to default and other risks) n = Number of periods in the investment horizon ~ ~ ~ ~ P = CF 1 + CF 2 + CF 3 + … + CF n (1 + Err) 1 (1 + Err) 2 (1 + Err) 3 (1 + Err) n Where: Err = Expected rate of return CF 1 = Cash flow projected in period t (t = 1, …, n) ~ = Indicates that projected cash flow is uncertain (due to default and other risks) n = Number of periods in the investment horizon

5. ©2007, The McGraw-Hill Companies, All Rights Reserved 3-5 McGraw-Hill/Irwin Realized Rate of Return The actual interest rate earned on an investment in a financial security P = RCF 1 + RCF 2 + … + RCF n (1 + rr) 1 (1 + rr) 2 (1 + rr) n Where: RCF = Realized cash flow in period t (t = 1, …, n) rr = Realized rate of return on a security The actual interest rate earned on an investment in a financial security P = RCF 1 + RCF 2 + … + RCF n (1 + rr) 1 (1 + rr) 2 (1 + rr) n Where: RCF = Realized cash flow in period t (t = 1, …, n) rr = Realized rate of return on a security

6. ©2007, The McGraw-Hill Companies, All Rights Reserved 3-6 McGraw-Hill/Irwin Bond Valuation The valuation of a bond instrument employs time value of money concepts –Reflects present value of all cash flows promised or projected, discounted at the required rate of return (rrr) –Expected rate of return (Err) is the interest rate that equates the current market price to the present value of all promised cash flows received over the life of the bond –Realized rate of return (rr) on a bond is the actual return earned on a bond investment that has already taken place The valuation of a bond instrument employs time value of money concepts –Reflects present value of all cash flows promised or projected, discounted at the required rate of return (rrr) –Expected rate of return (Err) is the interest rate that equates the current market price to the present value of all promised cash flows received over the life of the bond –Realized rate of return (rr) on a bond is the actual return earned on a bond investment that has already taken place

7. ©2007, The McGraw-Hill Companies, All Rights Reserved 3-7 McGraw-Hill/Irwin Bond Valuation Formula V b = INT/2 + INT/2 +... + INT/2 __ (1 + i d /2) 1 (1 + i d /2) 2 (1 + i d /2) 2N + M_ _ _ (1 + i d /2) 2N Where: V b = Present value of the bond M = Par or face value of the bond INT = Annual interest (or coupon) payment per year on the bond; equals the par value of the bond times the (percentage) coupon rate N = Number years until the bond matures i d = Interest rate used to discount cash flows on the bond V b = INT/2 + INT/2 +... + INT/2 __ (1 + i d /2) 1 (1 + i d /2) 2 (1 + i d /2) 2N + M_ _ _ (1 + i d /2) 2N Where: V b = Present value of the bond M = Par or face value of the bond INT = Annual interest (or coupon) payment per year on the bond; equals the par value of the bond times the (percentage) coupon rate N = Number years until the bond matures i d = Interest rate used to discount cash flows on the bond

8. ©2007, The McGraw-Hill Companies, All Rights Reserved 3-8 McGraw-Hill/Irwin Bond Valuation Example V b = 1,000(.1) (PVIFA 8%/2, 12(2) ) + 1,000(PVIF 8%/2, 12(2) ) 2 Where: V b = $1,152.47 (solution) M = $1,000 INT = $100 per year (10% of $1,000) N = 12 years i d = 8% (rrr) PVIF = Present value interest factor of a lump sum payment PVIFA = present value interest factor of an annuity stream V b = 1,000(.1) (PVIFA 8%/2, 12(2) ) + 1,000(PVIF 8%/2, 12(2) ) 2 Where: V b = $1,152.47 (solution) M = $1,000 INT = $100 per year (10% of $1,000) N = 12 years i d = 8% (rrr) PVIF = Present value interest factor of a lump sum payment PVIFA = present value interest factor of an annuity stream

9. ©2007, The McGraw-Hill Companies, All Rights Reserved 3-9 McGraw-Hill/Irwin Description of a Premium, Discount, and Par Bond Premium bond—when the coupon rate, INT, is greater then the required rate of return, rrr, the fair present value of the bond (V b ) is greater than its face value (M) Discount bond— when INT<rrr, then V b <M Par bond— when INT=rrr, then V b =M Premium bond—when the coupon rate, INT, is greater then the required rate of return, rrr, the fair present value of the bond (V b ) is greater than its face value (M) Discount bond— when INT<rrr, then V b <M Par bond— when INT=rrr, then V b =M

10. ©2007, The McGraw-Hill Companies, All Rights Reserved 3-10 McGraw-Hill/Irwin Yield to Maturity The return or yield the bond holder will earn on the bond if he or she buys it at its current market price, receives all coupon and principal payments as promised, and holds the bond until maturity V b = INT (PVIFA ytm/m, Nm ) + M(PVIF ytm/m,Nm ) m The return or yield the bond holder will earn on the bond if he or she buys it at its current market price, receives all coupon and principal payments as promised, and holds the bond until maturity V b = INT (PVIFA ytm/m, Nm ) + M(PVIF ytm/m,Nm ) m

11. ©2007, The McGraw-Hill Companies, All Rights Reserved 3-11 McGraw-Hill/Irwin Summary of Factors that Affect Security Prices and Price Volatility when Interest Rates Change Interest Rate Time Remaining to Maturity Coupon Rate Interest Rate Time Remaining to Maturity Coupon Rate

12. ©2007, The McGraw-Hill Companies, All Rights Reserved 3-12 McGraw-Hill/Irwin Impact of Interest Rate Changes on Security Values Interest Rate Bond Value Interest Rate Bond Value 12% 10% 8% 874.501,0001,152.47

13. ©2007, The McGraw-Hill Companies, All Rights Reserved 3-13 McGraw-Hill/Irwin Balance sheet of an FI before and after an Interest Rate Increase (a) Balance Sheet before the Interest Rate Increase Assets Bond (8% required rate of return) $1,152.47 Liabilities and Equity Bond (10% required rate of return) $1,000 Equity $152.47 (b) Balance Sheet after 2% increase in the Interest Rate Increase Assets $1,000 Bond (10% required rate of return) Liabilities and Equity Bond (12% required rate of return) Equity $874.50 $125.50

14. ©2007, The McGraw-Hill Companies, All Rights Reserved 3-14 McGraw-Hill/Irwin Impact of Maturity on Security Values 12 Years to Maturity 16 Years to Maturity Required Rate of Return Fair Price* Price Change Percentage Price Change 8% $1,152.47 -$152.47 -13.23% 10% $1,000.00 -$125.50 -12.55% 12% $874.50 Fair Price* Price Change Percentage Price Change $1,178.74 -$178.74 -15.16% $1,000.00 -$140.84 -14.08% $859.16 *The bond pays 10% coupon interest compounded semiannually and has a face value of $1,000

15. ©2007, The McGraw-Hill Companies, All Rights Reserved 3-15 McGraw-Hill/Irwin Impact of a Bond’s Maturity on its Interest Rate Sensitivity Absolute Value of Percent Change in a Bond’s Price for a Given Change in Interest Rates Absolute Value of Percent Change in a Bond’s Price for a Given Change in Interest Rates Time to Maturity

16. ©2007, The McGraw-Hill Companies, All Rights Reserved 3-16 McGraw-Hill/Irwin Impact of a Bond’s Coupon Rate on Its Interest Rate Sensitivity Interest Rate Interest Rate Bond Value Low-Coupon Bond High-Coupon Bond

17. ©2007, The McGraw-Hill Companies, All Rights Reserved 3-17 McGraw-Hill/Irwin Duration: A Measure of Interest Rate Sensitivity The weighted-average time to maturity on an investment N N  CF t  t  PV t  t t = 1 (1 + R) t t = 1 D = N = N  CF t  PV t t = 1 (1 + R) t t = 1 The weighted-average time to maturity on an investment N N  CF t  t  PV t  t t = 1 (1 + R) t t = 1 D = N = N  CF t  PV t t = 1 (1 + R) t t = 1

18. ©2007, The McGraw-Hill Companies, All Rights Reserved 3-18 McGraw-Hill/Irwin Features of the Duration Measure Duration and Coupon Interest –the higher the coupon payment, the lower is a bond’s duration Duration and Yield to Maturity –duration increases as yield to maturity increases Duration and Maturity –Duration increases with the maturity of a bond but at a decreasing rate Duration and Coupon Interest –the higher the coupon payment, the lower is a bond’s duration Duration and Yield to Maturity –duration increases as yield to maturity increases Duration and Maturity –Duration increases with the maturity of a bond but at a decreasing rate

19. ©2007, The McGraw-Hill Companies, All Rights Reserved 3-19 McGraw-Hill/Irwin Discrepancy Between Maturity and Duration on a Coupon Bond

20. ©2007, The McGraw-Hill Companies, All Rights Reserved 3-20 McGraw-Hill/Irwin Economic Meaning of Duration Measure of the average life of a bond Measure of a bond’s interest rate sensitivity (elasticity) Measure of the average life of a bond Measure of a bond’s interest rate sensitivity (elasticity)