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Chapter 5 - The Time Value of Money

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  1. Chapter 5 - The Time Value of Money  2005, Pearson Prentice Hall

  2. The Time Value of Money Compounding and Discounting Single Sums

  3. Today Future We know that receiving $1 today is worth more than $1 in the future. This is duetoopportunity costs. The opportunity cost of receiving $1 in the future is theinterestwe could have earned if we had received the $1 sooner.

  4. If we can measure this opportunity cost, we can:

  5. Today Future ? If we can measure this opportunity cost, we can: • Translate $1 today into its equivalent in the future(compounding).

  6. Today Future ? Today Future ? If we can measure this opportunity cost, we can: • Translate $1 today into its equivalent in the future(compounding). • Translate $1 in the future into its equivalent today(discounting).

  7. Compound Interest and Future Value

  8. Future Value - single sumsIf you deposit $100 in an account earning 6%, how much would you have in the account after 1 year?

  9. Future Value - single sumsIf you deposit $100 in an account earning 6%, how much would you have in the account after 1 year? Mathematical Solution: FV = PV (FVIF i, n) FV = 100 (FVIF .06, 1) (use FVIF table, or) FV = PV (1 + i)n FV = 100 (1.06)1 = $106 PV = -100 FV = 106 0 1

  10. Future Value - single sumsIf you deposit $100 in an account earning 6%, how much would you have in the account after 5 years?

  11. Future Value - single sumsIf you deposit $100 in an account earning 6%, how much would you have in the account after 5 years? Mathematical Solution: FV = PV (FVIF i, n) FV = 100 (FVIF .06, 5) (use FVIF table, or) FV = PV (1 + i)n FV = 100 (1.06)5 = $133.82 PV = -100 FV = 133.82 0 5

  12. Future Value - single sumsIf you deposit $100 in an account earning 6% with quarterly compounding, how much would you have in the account after 5 years?

  13. Future Value - single sumsIf you deposit $100 in an account earning 6% with quarterly compounding, how much would you have in the account after 5 years? Mathematical Solution: FV = PV (FVIF i, n) FV = 100 (FVIF .015, 20) (can’t use FVIF table) FV = PV (1 + i/m) m x n FV = 100 (1.015)20 = $134.68 PV = -100 FV = 134.68 0 20

  14. Future Value - single sumsIf you deposit $100 in an account earning 6% with monthly compounding, how much would you have in the account after 5 years?

  15. Future Value - single sumsIf you deposit $100 in an account earning 6% with monthly compounding, how much would you have in the account after 5 years? Mathematical Solution: FV = PV (FVIF i, n) FV = 100 (FVIF .005, 60) (can’t use FVIF table) FV = PV (1 + i/m) m x n FV = 100 (1.005)60 = $134.89 PV = -100 FV = 134.89 0 60

  16. Future Value - continuous compoundingWhat is the FV of $1,000 earning 8% with continuous compounding, after 100 years?

  17. Future Value - continuous compoundingWhat is the FV of $1,000 earning 8% with continuous compounding, after 100 years? Mathematical Solution: FV = PV (e in) FV = 1000 (e .08x100) = 1000 (e 8) FV = $2,980,957.99 PV = -1000 FV = $2.98m 0 100

  18. Present Value

  19. Present Value - single sumsIf you receive $100 one year from now, what is the PV of that $100 if your opportunity cost is 6%?

  20. PV = -94.34 FV = 100 0 1 Present Value - single sumsIf you receive $100 one year from now, what is the PV of that $100 if your opportunity cost is 6%? Mathematical Solution: PV = FV (PVIF i, n) PV = 100 (PVIF .06, 1) (use PVIF table, or) PV = FV / (1 + i)n PV = 100 / (1.06)1 = $94.34

  21. Present Value - single sumsIf you receive $100 five years from now, what is the PV of that $100 if your opportunity cost is 6%?

  22. PV = -74.73 FV = 100 0 5 Present Value - single sumsIf you receive $100 five years from now, what is the PV of that $100 if your opportunity cost is 6%? Mathematical Solution: PV = FV (PVIF i, n) PV = 100 (PVIF .06, 5) (use PVIF table, or) PV = FV / (1 + i)n PV = 100 / (1.06)5 = $74.73

  23. Present Value - single sumsWhat is the PV of $1,000 to be received 15 years from now if your opportunity cost is 7%?

  24. PV = -362.45 FV = 1000 0 15 Present Value - single sumsWhat is the PV of $1,000 to be received 15 years from now if your opportunity cost is 7%? Mathematical Solution: PV = FV (PVIF i, n) PV = 100 (PVIF .07, 15) (use PVIF table, or) PV = FV / (1 + i)n PV = 100 / (1.07)15 = $362.45

  25. Present Value - single sumsIf you sold land for $11,933 that you bought 5 years ago for $5,000, what is your annual rate of return?

  26. Present Value - single sumsIf you sold land for $11,933 that you bought 5 years ago for $5,000, what is your annual rate of return? Mathematical Solution: PV = FV (PVIF i, n ) 5,000 = 11,933 (PVIF ?, 5 ) PV = FV / (1 + i)n 5,000 = 11,933 / (1+ i)5 .419 = ((1/ (1+i)5) 2.3866 = (1+i)5 (2.3866)1/5 = (1+i) i = .19

  27. Present Value - single sumsSuppose you placed $100 in an account that pays 9.6% interest, compounded monthly. How long will it take for your account to grow to $500? Mathematical Solution: PV = FV / (1 + i)n 100 = 500 / (1+ .008)N 5 = (1.008)N ln 5 = ln (1.008)N ln 5 = N ln (1.008) 1.60944 = .007968 N N = 202 months

  28. Hint for single sum problems: • In every single sum present value and future value problem, there are four variables: FV, PV, i and n. • When doing problems, you will be given three variables and you will solve for the fourth variable. • Keeping this in mind makes solving time value problems much easier!

  29. 0 1 2 3 4 The Time Value of Money Compounding and Discounting Cash Flow Streams

  30. 0 1 2 3 4 Annuities • Annuity: a sequence of equal cash flows, occurring at the end of each period.

  31. Examples of Annuities: • If you buy a bond, you will receive equal semi-annual coupon interest payments over the life of the bond. • If you borrow money to buy a house or a car, you will pay a stream of equal payments.

  32. Future Value - annuityIf you invest $1,000 each year at 8%, how much would you have after 3 years?

  33. Future Value - annuityIf you invest $1,000 each year at 8%, how much would you have after 3 years? Mathematical Solution: FV = PMT (FVIFA i, n) FV = 1,000 (FVIFA .08, 3) (use FVIFA table, or) FV = PMT (1 + i)n - 1 i FV = 1,000 (1.08)3 - 1 = $3246.40 .08

  34. Present Value - annuityWhat is the PV of $1,000 at the end of each of the next 3 years, if the opportunity cost is 8%?

  35. Present Value - annuityWhat is the PV of $1,000 at the end of each of the next 3 years, if the opportunity cost is 8%? Mathematical Solution: PV = PMT (PVIFA i, n) PV = 1,000 (PVIFA .08, 3) (use PVIFA table, or) 1 PV = PMT 1 - (1 + i)n i 1 PV = 1000 1 - (1.08 )3 = $2,577.10 .08

  36. 0 1 2 3 Other Cash Flow Patterns The Time Value of Money

  37. Perpetuities • Suppose you will receive a fixed payment every period (month, year, etc.) forever. This is an example of a perpetuity. • You can think of a perpetuity as an annuity that goes on forever.

  38. Present Value of a Perpetuity • When we find the PV of an annuity, we think of the following relationship: PV = PMT (PVIFA i, n )

  39. 1 n 1 - (1 + i) i Mathematically, (PVIFA i, n ) = We said that a perpetuity is an annuity where n = infinity. What happens to this formula when n gets very, very large?

  40. 1 n 1 - (1 + i) i 1 i When n gets very large, this becomes zero. So we’re left with PVIFA =

  41. PMT PV = i Present Value of a Perpetuity • So, the PV of a perpetuity is very simple to find:

  42. What should you be willing to pay in order to receive $10,000 annually forever, if you require 8% per year on the investment?

  43. PMT $10,000 i .08 = $125,000 PV = = What should you be willing to pay in order to receive $10,000 annually forever, if you require 8% per year on the investment?

  44. $1000 $1000 $1000 4 5 6 7 8 Ordinary Annuity vs. Annuity Due

  45. 1000 1000 1000 4 5 6 7 8 PV in END Mode FV in END Mode Begin Mode vs. End Mode year year year 5 6 7 ordinary annuity

  46. 1000 1000 1000 4 5 6 7 8 PV in BEGIN Mode FV in BEGIN Mode Begin Mode vs. End Mode year year year 6 7 8 annuity due

  47. 0 1 2 3 Earlier, we examined this “ordinary” annuity: 1000 1000 1000

  48. 0 1 2 3 Earlier, we examined this “ordinary” annuity: 1000 1000 1000 Using an interest rate of 8%, we find that: • The Future Value (at 3) is $3,246.40. • The Present Value (at 0) is $2,577.10.

  49. 0 1 2 3 What about this annuity? 1000 1000 1000 • Same 3-year time line, • Same 3 $1000 cash flows, but • The cash flows occur at the beginning of each year, rather than at the end of each year. • This is an “annuity due.”

  50. (1 + i) (1.08) Future Value - annuity due If you invest $1,000 at the beginning of each of the next 3 years at 8%, how much would you have at the end of year 3? Mathematical Solution:Simply compound the FV of the ordinary annuity one more period: FV = PMT (FVIFA i, n) (1 + i) FV = 1,000 (FVIFA .08, 3) (1.08) (use FVIFA table, or) FV = PMT (1 + i)n - 1 i FV = 1,000 (1.08)3 - 1 = $3,506.11 .08