chapter 5 the time value of money topics covered 5.1 future values and compound interest 5.2 present...
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Chapter 5The Time Value of Money
Topics Covered5.1 Future Values and Compound Interest
5.2 Present Values
5.3 Multiple Cash Flows
5.4 Level Cash Flows Perpetuities and Annuities
5.5 Effective Annual Interest Rates
5.6 Inflation & Time Value (excluded)
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Future Values
Future Value - Amount to which an investment will grow after earning interest.
Compound Interest - Interest earned on interest.
Simple Interest - Interest earned only on the original investment.
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Future Values
Example - Simple InterestInterest earned at a rate of 6% for five years on a principal balance of $100.
Interest Earned Per Year = 100 x .06 = $ 6
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Example - Simple InterestInterest earned at a rate of 6% for five years on a principal balance of $100.
Today Future Years 1 2 3 4 5
Interest EarnedValue 100
Future Values
6106
6112
6118
6124
6130
Value at the end of Year 5 = $130
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Future Values
Example - Compound Interest
Interest earned at a rate of 6% for five years on the previous year’s balance.
Interest Earned Per Year =Prior Year Balance x .06
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Example - Compound InterestInterest earned at a rate of 6% for five years on the previous year’s balance.
Today Future Years 1 2 3 4 5
Interest EarnedValue 100
Future Values
6106
6.36112.36
6.74119.10
7.15126.25
7.57133.82
Value at the end of Year 5 = $133.82
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Future Values
Future Value of $100 = FV
FV r t $100 ( )1
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Future Values
FV r t $100 ( )1
Example - FV
What is the future value of $100 if interest is compounded annually at a rate of 6% for five years?
82.133$)06.1(100$ 5 FV
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0
200
400
600
800
1000
1200
1400
1600
1800
0 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20
Number of Years
FV
of
$100
0%
5%
10%
15%
Future Values with Compounding
Interest Rates
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Manhattan Island Sale
Peter Minuit bought Manhattan Island for $24 in 1626. Was this a good deal?
trillion
FV
63.140$
)08.1(24$ 382
To answer, determine $24 is worth in the year 2008, compounded at 8%.
FYI - The value of Manhattan Island land is FYI - The value of Manhattan Island land is well below this figure.well below this figure.
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Present Values
Present Value
Value today of a future cash
flow.
Discount Rate
Interest rate used to compute
present values of future cash flows.
Discount Factor
Present value of a $1 future payment.
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Present Values
Present Value = PV
PV = Future Value after t periods
(1+r) t
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Present Values
Example
You just bought a new computer for $3,000. The payment terms are 2 years same as cash. If you can earn 8% on your money, how much money should you set aside today in order to make the payment when due in two years?
572,2$2)08.1(3000 PV
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Present Values
Discount Factor = DF = PV of $1
Discount Factors can be used to compute the present value of any cash flow.
DFr t
1
1( )
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The PV formula has many applications. Given any variables in the equation, you can solve for the remaining variable.
PV FVr t
1
1( )
Time Value of Money(applications)
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0
20
40
60
80
100
120
0 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20
Number of Years
PV
of
$100
0%
5%
10%
15%
Present Values with Compounding
Interest Rates
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Multiple Cash Flows
Any type of cash flows (whether they are equal, consecutive payments or irregular, unequal cash flows over time) are referred to as a stream of cash flows.
Example (FV of Multiple CFs):
What is the future value of the stream of cash flows 3 years from now that
pay $1200 now, $1400 in year 1 and $1000 in year 2? Interest rate is 8%.
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PV of Multiple Cash Flows
ExampleYour auto dealer gives you the choice to pay $15,500 cash now, or make three payments: $8,000 now and $4,000 at the end of the following two years. If your cost of money is 8%, which do you prefer?
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Present Values
Present Value
Year 0
4000/1.08
4000/1.082
Total
= $3,703.70
= $3,429.36
= $15,133.06
$4,000
$8,000
Year0 1 2
$ 4,000
$8,000
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PV of Multiple Cash Flows
PVs can be added together to evaluate multiple cash flows.
PV C
r
C
r
1
12
21 1( ) ( )....
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Perpetuities & Annuities
Perpetuity A stream of level cash payments that never ends.
AnnuityEqually spaced level stream of cash flows for alimited period of time.
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Perpetuities & Annuities
PV of Perpetuity Formula
C = cash payment
r = interest rate
PV Cr
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Perpetuities & Annuities
Example - Perpetuity
In order to create an endowment, which pays $100,000 per year, forever, how much money must be set aside today in the rate of interest is 10%?
PV 100 00010 000 000,. $1, ,
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Perpetuities & Annuities
Example - continued
If the first perpetuity payment will not be received until three years from today, how much money needs to be set aside today?
PV
1 000 000
1 10 3 315, ,
( . )$751,
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Perpetuities & Annuities
PV of Annuity Formula
C = cash payment r = interest rate t = Number of years cash payment is received
PV C r r r t
1 11( )
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Perpetuities & Annuities
PV Annuity Factor (PVAF) - The present value of $1 a year for each of t years.
PVAF r r r t
1 11( )
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Perpetuities & Annuities
Example - Annuity
You are purchasing a car. You are scheduled to make 3 annual installments of $4,000 per year. Given a rate of interest of 10%, what is the price you are paying for the car (i.e. what is the PV)?
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Annuities Due
Annuities-Due
A level stream of payments starting immediately is known as annuity due.
PV of an Annuity Due: (1+r) x PV of an Annuity
FV of an Annuity Due: (1+r)t x PV of an Annuity
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Perpetuities & Annuities
Applications Value of payments Implied interest rate for an annuity Calculation of periodic payments
Mortgage payment Annual income from an investment payout Future Value of annual payments
FV C PVAF r t ( )1
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Perpetuities & Annuities
Example - Future Value of annual payments
You plan to save $4,000 every year for 20 years and then retire. Given a 10% rate of interest, what will be the FV of your retirement account?
FV
FV
4 000 1 10
100
110
110 1 10
2020, ( . )
$229,
. . ( . )
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Effective Interest Rates
Annual Percentage Rate - Interest rate that is annualized using simple interest.
Effective Annual Interest Rate - Interest rate that is annualized using compound interest.
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Effective Interest Rates
example
Given a monthly rate of 1%, what is the Effective Annual Rate(EAR)? What is the Annual Percentage Rate (APR)?
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Effective Interest Rates
example
Given a monthly rate of 1%, what is the Effective Annual Rate(EAR)? What is the Annual Percentage Rate (APR)?
12.00%or .12=12 x .01=APR
12.68%or .1268=1-.01)+(1=EAR
r=1-.01)+(1=EAR12
12