1. Valuing Cash Flows Non-Contingent Payments

2. Non-Contingent Payouts Given an asset with payments (i.e. independent of the state of the world), the asset’s price should equal the present value of the cash flows. Given an asset with fixed payments (i.e. independent of the state of the world), the asset’s price should equal the present value of the cash flows.

3. Treasury Notes US Treasuries notes have maturities between 2 and ten years. US Treasuries notes have maturities between 2 and ten years. Treasury notes make biannual interest payments and then a repayment of the face value upon maturity Treasury notes make biannual interest payments and then a repayment of the face value upon maturity US Treasury notes can be purchased in increments of $1,000 of face value. US Treasury notes can be purchased in increments of $1,000 of face value.

4. Consider a 3 year Treasury note with a 6% annual coupon and a $1,000 face value. Now6mos1yrs2yrs1.5 yrs2.5yrs3yrs $30 $1,030 F(0,1) = 2.25% F(1,1) = 2.75% F(2,1) = 2.8% F(3,1) = 3% F(5,1) = 4.1% F(4,1) = 3.1% You have a statistical model that generates the following set of (annualized) forward rates F(0,1)F(1,1)F(2,1)F(3,1)F(5,1)F(4,1)

5. Now6mos1yrs2yrs1.5 yrs2.5yrs3yrs $30 $1,030 2.25%2.75%2.8%3%4.1%3.1% Given an expected path for (annualized) forward rates, we can calculate the present value of future payments. P = $30 (1.01125) + $30 (1.01125)(1.01375) + + … $30 (1.01125)(1.01375)(1.014) = $1,084.90 + $1,030 (1.01125)………….(1.0205) + …

6. Forward Rate Pricing Current Asset Price Cash Flow at time t Interest rate between periods t-1 and t

7. Now6mos1yrs2yrs1.5 yrs2.5yrs3yrs $30 $1,030 Alternatively, we can use current spot rates from the yield curve

8. Now6mos1yrs2yrs1.5 yrs2.5yrs3yrs $30 $1,030 $30 $1,030 =+++++ P (1.0125) (1.0135) (1.015) 23456 P = $1,084.90 S(1) 2 S(2) 2 S(3) 2 The yield curve produces the same bond price…..why?

9. Spot Rate Pricing Current Asset Price Cash flow at period t Current spot rate for a maturity of t periods

10. Alternatively, given the current price, what is the implied (constant) interest rate. Now6mos1yrs2yrs1.5 yrs2.5yrs3yrs $30 $1,030 $30 $1,030 = +++++ (1+i) 23456 P = $1,084.90 P (1+i) = 1.015 (1.5%) Given the current,market price of $1,084.90, this Treasury Note has an annualized Yield to Maturity of 3%

11. Yield to Maturity Current Market Price Yield to Maturity Cash flow at time t

12. Yield to maturity measures the total performance of a bond from purchase to expiration. Yield to maturity measures the total performance of a bond from purchase to expiration. Consider $1,000, 2 year STRIP selling for $942 $942 = $1,000 (1+Y) 2 = $1,000 $942.5 = 1.03 (3%) For a discount (one payment) bond, the YTM is equal to the expected spot rate For coupon bonds, YTM is cash flow specific

13. Consider a 5 year Treasury Note with a 5% annual coupon rate (paid annually) and a face value of $1,000 $50 = ++++ (1.05) 2345 P = $1,000 The one year interest rate is currently 5% and is expected to stay constant. Further, there is no liquidity premium Term Yield 5% This bond sells for Par Value and YTM = Coupon Rate

14. Consider a 5 year Treasury Note with a 5% annual coupon rate (paid annually) and a face value of $1,000 $50 = ++++ (1.06) 2345 P = $958 Now, suppose that the current 1 year rate rises to 6% and is expected to remain there Term Yield 5% 6% This bond sells at a discount and YTM > Coupon Rate

15. Price Yield $958 5%6% $1,000 $42 A 1% rise in yield is associated with a $42 (4.2%) drop in price

16. Consider a 5 year Treasury Note with a 5% annual coupon rate (paid annually) and a face value of $1,000 $50 = ++++ (1.04) 2345 P = $1045 Now, suppose that the current 1 year rate falls to 4% and is expected to remain there Term Yield 5% 4% This bond sells at a premium and YTM < Coupon Rate

17. Price Yield $958 5%6%4% $1,045 $1,000 $45 $42 A 1% drop in yield is associated with a $45 (4.5%) rise in price

18. Price Yield $958 5%6%4% $1,045 $1,000 $45 $42 Pricing Function A bond’s pricing function shows all the combinations of yield/price 1)The bond pricing is non-linear 2)The pricing function is unique to a particular stream of cash flows

19. Duration Recall that in general the price of a fixed income asset is given by the following formula Recall that in general the price of a fixed income asset is given by the following formula Note that we are denoting price as a function of yield: P(Y). Note that we are denoting price as a function of yield: P(Y).

20. $50 =++++ (1.05) 2345 P(Y=5%)= $1,000 Term Yield 5% This bond sells for Par Value and YTM = Coupon Rate For the 5 year, 5% Treasury, we had the following:

21. Price Yield 5% $1,000 Pricing Function

22. Suppose we take the derivative of the pricing function with respect to yield For the 5 year, 5% Treasury, we have

23. Now, evaluate that derivative at a particular point (say, Y = 5%, P = $1,000) For every 100 basis point change in the interest rate, the value of this bond changes by $43.29 This is the dollar duration DV01 is the change in a bond’s price per basis point shift in yield. This bond’s DV01 is $.43

24. Price Yield $958 5%6%4% $1,045 $1,000 Error = - $1 Pricing Function Error = $2 Duration predicted a $43 price change for every 1% change in yield. This is different from the actual price Dollar Duration

25. Dollar duration depends on the face value of the bond (a $1000 bond has a DD of $43 while a $10,000 bond has a DD of $430) modified duration represents the percentage change in a bonds price due to a 1% change in yield For the 5 year, 5% Treasury, we have Every 100 basis point shift in yield alters this bond’s price by 4.3%

26. Macaulay's Duration Macaulay’ duration measures the percentage change in a bond’s price for every 1% change in (1+Y) (1.05)(1.01) = 1.0605 For the 5 year, 5% Treasury, we have

27. For bonds with one payment, Macaulay duration is equal to the term Example: 5 year STRIP Dollar Duration Modified Duration Macaulay Duration

28. Think of a coupon bond as a portfolio of STRIPS. Each payment has a Macaulay duration equal to its date. The bond’s Macaulay duration is a weighted average of the individual durations Back to the 5 year Treasury $50 =++++ (1.05) 2345 P(Y=5%)= $1,000 $47.62$822.70$41.14$43.19$45.35 $47.62 $1,000 $45.35 $1,000 $43.19 $1,000 $41.14 $1,000 $822.70 $1,000 ++++ 12345 Macaulay Duration = 4.55

29. Modified Duration = Macaulay Duration (1+Y) Modified Duration = 4.55 1.05 =4.3 Dollar Duration =Modified Duration (Price) Dollar Duration = 4.3($1,000) = $4,300

30. Duration measures (the risk involved with a parallel shift in the yield curve) This almost never happens. Duration measures interest rate risk (the risk involved with a parallel shift in the yield curve) This almost never happens.

31. Yield curve risk involves changes in an asset’s price due to a change in the shape of the yield curve

32. Key Duration In order to get a better idea of a Bond’s (or portfolio’s) exposure to yield curve risk, a key rate duration is calculated. This measures the sensitivity of a bond/portfolio to a particular spot rate along the yield curve holding all other spot rates constant. In order to get a better idea of a Bond’s (or portfolio’s) exposure to yield curve risk, a key rate duration is calculated. This measures the sensitivity of a bond/portfolio to a particular spot rate along the yield curve holding all other spot rates constant.

33. Returning to the 5 Year Treasury A Key duration for the three year spot rate is the partial derivative with respect to S(3) Evaluated at S(3) = 5%

34. Key Durations Note that the individual key durations sum to $4329 – the bond’s overall duration X 100

35. Yield Curve Shifts - 4% - 2% 0%+1%

36. - 4% - 2% 0%+1% ++++ 110(-2)(-4)$.4535$.8638$.12341$.15671$39.81 This yield curve shift would raise a five year Treasury price by $161 = $161

37. Price Yield $958 6%4% $1,045 Suppose that we simply calculate the slope between the two points on the pricing function Slope = $1,045 - $958 4% - 6% = $43.50 or Slope = $1,045 - $958 4% - 6% $1,000 *100 = 4.35

38. Price Yield $958 6%4% $1,045 Pricing Function Dollar Duration Effective Duration Effective duration measures interest rate sensitivity using the actual pricing function rather that the derivative. This is particularly important for pricing bonds with embedded options!!

39. Value At Risk Suppose you are a portfolio manager. The current value of your portfolio is a known quantity. Tomorrow’s portfolio value us an unknown, but has a probability distribution with a known mean and variance Profit/Loss = Tomorrow’s Portfolio Value – Today’s portfolio value Known DistributionKnown Constant

40. Probability Distributions One Standard Deviation Around the mean encompasses 65% of the distribution 1 Std Dev = 65% 2 Std Dev = 95% 3 Std Dev = 99%

41. Interest Rate Mean = 6% Std. Dev. = 2% $1,000, 5 Year Treasury (6% coupon) Remember, the 5 year Treasury has a MD 0f 4.3 Mean = $1,000 Std. Dev. = $86 Profit/Loss Mean = $0 Std. Dev. = $86

42. One Standard Deviation Around the mean encompasses 65% of the distribution 1 Std Dev = 65% 2 Std Dev = 95% 3 Std Dev = 99% The VAR(65) for a $1,000, 5 Year Treasury (assuming the distribution of interest rates) would be $86. The VAR(95) would be $172 In other words, there is only a 5% chance of losing more that $172

43. Interest Rate Mean = 6% Std. Dev. = 2% $1000, 30 Year Treasury (6% coupon) A 30 year Treasury has a MD of 14 Mean = $1,000 Std. Dev. = $280 Profit/Loss Mean = $0 Std. Dev. = $280

44. One Standard Deviation Around the mean encompasses 65% of the distribution The VAR(65) for a $1,000, 30 Year Treasury (assuming the distribution of interest rates) would be $280. The VAR(95) would be $560 In other words, there is only a 5% chance of losing more that $560

45. Example: Orange County In December 1994, Orange County, CA stunned the markets by declaring bankruptcy after suffering a $1.6B loss. In December 1994, Orange County, CA stunned the markets by declaring bankruptcy after suffering a $1.6B loss. The loss was a result of the investment activities of Bob Citron – the county Treasurer – who was entrusted with the management of a $7.5B portfolio The loss was a result of the investment activities of Bob Citron – the county Treasurer – who was entrusted with the management of a $7.5B portfolio

46. Example: Orange County Actually, up until 1994, Bob’s portfolio was doing very well. Actually, up until 1994, Bob’s portfolio was doing very well.

47. Example: Orange County Given a steep yield curve, the portfolio was betting on interest rates falling. A large share was invested in 5 year FNMA notes. Given a steep yield curve, the portfolio was betting on interest rates falling. A large share was invested in 5 year FNMA notes.

48. Example: Orange County Ordinarily, the duration on a portfolio of 5 year notes would be around 4-5. However, this portfolio was heavily leveraged ($7.5B as collateral for a $20.5B loan). This dramatically raises the VAR Ordinarily, the duration on a portfolio of 5 year notes would be around 4-5. However, this portfolio was heavily leveraged ($7.5B as collateral for a $20.5B loan). This dramatically raises the VAR

49. Example: Orange County In February 1994, the Fed began a series of six consecutive interest rate increases. The beginning of the end! In February 1994, the Fed began a series of six consecutive interest rate increases. The beginning of the end!

50. Risk vs. Return As a portfolio manager, your job is to maximize your As a portfolio manager, your job is to maximize your risk adjusted return Risk Adjusted Return =Nominal Return – “Risk Penalty” You can accomplish this by 1 of two methods: 1) Maximize the nominal return for a given level of risk 2) Minimize Risk for a given nominal return

51. $5 = ++++ (1.05) 234 P = $100 Again, assume that the one year spot rate is currently 5% and is expected to stay constant. There is no liquidity premium, so the yield curve is flat. Term Yield 5% All 5% coupon bonds sell for Par Value and YTM = Coupon Rate = Spot Rate = 5%. Further, bond prices are constant throughout their lifetime. …

52. Available Assets 1 Year Treasury Bill (5% coupon) 1 Year Treasury Bill (5% coupon) 3 Year Treasury Note (5% coupon) 3 Year Treasury Note (5% coupon) 5 Year Treasury Note (5% coupon) 5 Year Treasury Note (5% coupon) 10 Year Treasury Note (5% coupon) 10 Year Treasury Note (5% coupon) 20 Year Treasury Bond (5% coupon) 20 Year Treasury Bond (5% coupon) STRIPS of all Maturities STRIPS of all Maturities How could you maximize your risk adjusted return on a $100,000 Treasury portfolio?

53. 20 Year $100,000 $5000 =++++ (1.05) 23 … 20 P(Y=5%) $4,762$39,573$4,319$4,535 $4,762 $100,000 $4,535 $100,000 $4,319 $100,000 $82,270 $100,000 ++++ 12320 Macaulay Duration = 12.6 Suppose you buy a 20 Year Treasury … $5000/yr$105,000

54. 20 Year $50,000 Alternatively, you could buy a 20 Year Treasury and a 5 year STRIPS 5 Year $50,000 $63,814 5 Year $63,814 $2500/yr$52,500 (Remember, STRIPS have a Macaulay duration equal to their Term) Portfolio Duration = $100,000 $50,000 5 = 8.812.6 + $100,000 $50,000

55. 20 Year $50,000 Alternatively, you could buy a 20 Year Treasury and a 5 year Treasury 5 Year $50,000 5 Year $2500/yr$52,500 (5 Year Treasuries have a Macaulay duration equal to 4.3) Portfolio Duration = $100,000 $50,000 4.3 = 8.512.6 + $100,000 $50,000 $2500/yr $52,500

56. 20 Year $50,000 Even better, you could buy a 20 Year Treasury, and a 1 Year T-Bill $50,000 $2500/yr$52,500 (1 Year Treasuries have a Macaulay duration equal to 1) Portfolio Duration = $100,000 $50,000 1 = 6.312.6 + $100,000 $50,000 1 Year … $52,500

57. 20 Year $25,000 Alternatively, you could buy a 20 Year Treasury, a 10 Year Treasury, 5 year Treasury, and a 3 Year Treasury 10 Year $25,000 5 Year 3 Year $1250/yr Portfolio Duration = 6.08 $100,000 $25,000 12.6 + $100,000 $25,000 $1250/yr $25,000 D = 12.6 D = 7.7 D = 4.3 D = 2.7 7.7 $100,000 $25,000 4.3 + $100,000 $25,000 2.7 +

58. Obviously, with a flat yield curve, there is no advantage to buying longer term bonds. The optimal strategy is to buy 1 year T-Bills $100,000 Portfolio Duration = 1 1 Year … $105,000 However, the yield curve typically slopes up, which creates a risk/return tradeoff

59. Also, with an upward sloping yield curve, a bond’s price will change predictably over its lifetime

60. Pricing DateCouponYTMPrice ($) Issue3.75%3.75%100.00 20053.753.69100.96 20063.753.48101.77 20073.753.28102.20 20083.753.04102.35 20093.752.78102.11 20103.752.55101.29 20113.75Matures100.00 A Bond’s price will always approach its face value upon maturity, but will rise over its lifetime as the yield drops

61. Length of Bond Initial Duration Duration after 5 Years Percentage Change 30 Year 15.514.2-8% 20 Year 12.610.5-17% 10 Year 7.84.4-44% Also, the change is a bond’s duration is also a non-linear function As a bond ages, its duration drops at an increasing rate