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A B C D E F G H I J K L M N O P Q R
12/9/2012
Situation
Uneven cash flow stream.
I%
Time period 0 1 2 3
FV at year end -50 100 75 50
Interest rate 0.1 These are the basic inputs, in blue.
Cash flow 100
Time period 0 1 2 3
FV at year end
100 110.00 121 133.10
Chapter 4. Mini Case
b. (1.) What's the future value of an initial $100 after 3 years if it is invested in an account paying 10%
annual interest?
Assume that you are nearing graduation and have applied for a job with a local bank. As part of the
bank's evaluation process, you have been asked to take an examination that covers several financial
analysis techniques. The first section of the test addresses discounted cash flow analysis. See how
you would do by answering the following questions.
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A B C D E F G H I J K L M N O P Q R
FV = $133.10
After selecting the "FV" function from the "Financial" category, we will be using the following dialog box
to input our data.
After selecting the category for Financial functions, scroll down until you can selet the FV function, as
show below. Alternatively, select the menu Formulas, then then select Financial, then pick FV.
Notice that we entered a value instead of a cell reference as the input for the problem for instructional
purposes. It's really better to enter cell values so that your spreadsheet can automatically reflect any
changes to the input data. This is one of the features that makes the spreadsheet such a valuable tool.
Using the function wizard yields the following result:
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A B C D E F G H I J K L M N O P Q R
Period (N) 0% 5% 10% 15%
01.0000 1.0000 1.0000 1.0000
21.0000 1.1025 1.2100 1.3225
With a spreadsheet, calculating FVIF's is a simple operation, and we can use it to graph the relationship
between future value, growth, interest rates, and time. A similar table can be found in the textbook,
along with a corresponding graph.
Future Value Interest Factors
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A B C D E F G H I J K L M N O P Q R
PRESENT VALUE (PV)
PROBLEM
Interest rate 10%
PV = $75.13
b. (2) What is the present value of $100 to be received in 3 years if the appropriate interest rate is 10%?
Simply put, the present value (PV) is the value today of some future cash flow (or series of cash flows).
This problem can also be solved using the function wizard using a procedure similar to that for the FV
function. Begin by putting the pointer on the cell in which you want to display the result. Then, after
selecting the "PV" function from the "Paste Function" box, the input data for the problem must be
entered. Then click OK to get the result, $75.13.
Relationships among Future Value, Growth, Interest Rates, and Time
$4.00
$5.00
Relationships among Future Value, Growth, Interest
Rate, and Time
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A B C D E F G H I J K L M N O P Q R
Finding Time to Double
I = 0.2
3.8 Use the function NPER, as shown below.
Finding N, the number of
periods
c. We sometimes need to find how long it will take a sum of money (or anything else) to grow to some
specified amount. For example, if a company's sales are growing at a rate of 20% per year, how long will
it take sales to double?
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A B C D E F G H I J K L M N O P Q R
SOLVING FOR I
PROBLEM
N3
PV -1
FV 2
I = 25.99%
N3
We noted above the difficulty of solving this problem mathematically. This is because it involves taking
the Nth root of a value (an operation which generally requires either a calculator or a computer).
However, if you would like to know how to solve the problem mathematically, the formula is (FVn/PV)(1/N) -
1, which is derived from the FV formula.
Once again, Excel has a special function for this calculation. We suggest using either a financial
d. If you want an investment to double in three years, what interest rate must it earn?
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A B C D E F G H I J K L M N O P Q R
FUTURE VALUE OF AN ANNUITY
N3
I0.1
PMT 100
Time period 0 1 2 3
CFt0100 100 100 Annuity's FV:
FV = $331.00
PRESENT VALUE OF AN ANNUITY
As explained below, one way to solve this problem is to find the future value of each of the annuity
f. (1.) What is the future value of a 3-year ordinary annuity of $100 if the appropriate interest rate is 10%?
f. (2.) What is the present value of the annuity?
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A B C D E F G H I J K L M N O P Q R
N3
I0.1
PMT 100
FV = $364.10
f. (3.) What would the future and present values be if the annuity were an annuity due?
Additionally, using the function wizard for this problem is exactly like above, but we enter a "1" instead of a "0" into
the "Type" field.
The procedure for solving this problems follows the previous example with one notable exception. Since, the
payments occur at the beginning of each year, the first annuity payment occurs in time period 0, and the last occurs
in time period 2.
Or, you could use the function wizard for this ordinary annuity.
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A B C D E F G H I J K L M N O P Q R
N3
I0.1
PMT 100
Time period 0 1 2 3
PV = $273.55
I = 10%
Time period
0 1 2 3 4
0100 300 300 -50
Cash Flows
PV of Cash Flows
0 90.91 247.93 225.39 -34.15
NPV = = Σ of PVs = $530.09
To find the present value of the annuity due, this problem is solved just like the previous problem,
except that the payments occur in periods 0 through 2.
g. What is the present value of the following uneven cash flow stream? The appropriate interest rate is 10%,
Using the function wizard, we follow the same procedure as above, except remember to enter a "1" to
tell Excel that in this problem the payments occur at the beginning of the periods.
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A B C D E F G H I J K L M N O P Q R
Or
PV = $530.09
Inputs
INOM (quarterly) 0.1 This is the rate stated in contracts.
m=periods/yr 2This is the number of periods per year, m.
SEMIANNUAL AND OTHER COMPOUNDING PERIODS
h. (3.) What is the future value of $100 after 5 years under 12% annual compounding?
The periodic is associated with the number of compounding periods per year. M = 4 quarterly, 12 for monthly, and
360 or 365 for annual compounding.
The effective annual rate is the annual rate that causes the PV to grow to the same FV as under multiple
compounding periods.
With, the financial calculator, we could enter each of these cash flows and the discount rate, and simply
press NPV for the present value of the cash flow stream. In Excel, we can perform a similar calculation
by using the "NPV" function. While this function is very similar, there is a key distinction. In the cash
flow register of your calculator, the first entry you make would be the cash flow to occur in time period
zero. However, the "NPV" function interprets the first data entry as being the cash flow in time period
one. Therefore, the initial cash flow must be added seperately. In this particular example, the initial
cash flow is zero.
Larger, because interest is earned on interest.
h. (2.) Will the future value be larger or smaller if we compound an initial amount more often than annually, for
example, every 6 months (semiannually), holding the stated interest rate constant? Why?
h. (1.) Identify (a) the stated, or quoted, or nominal rate (iNom) and (b) the periodic rate (iPER).
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A B C D E F G H I J K L M N O P Q R
N (years x 2) 6
I (I per year/2) 0.06 FV = $141.85
PV 100
What is the FV with quarterly compounding?
What is the FV with daily compounding?
N (years x 365) 1095
I (I per year/12) 0.00032877 FV = $143.32
PV 100
NBeg. Amt. Payment Interest Principal End. Amt.
1 $1,000.00 $106.08 $100.00 $6.08 $993.92
2 $993.92 $106.08 $99.39 $6.69 $987.23
3 $987.23 $106.08 $98.72 $7.36 $979.88
NBeg. Amt. Payment Interest Principal End. Amt. 4 $979.88 $106.08 $97.99 $8.09 $971.79
1 $1,000.00 $402.11 $100.00 $302.11 $697.89 5 $971.79 $106.08 $97.18 $8.90 $962.89
2 $697.89 $402.11 $69.79 $332.33 $365.56 6 $962.89 $106.08 $96.29 $9.79 $953.09
3 $365.56 $402.11 $36.56 $365.56 $0.00 7 $953.09 $106.08 $95.31 $10.77 $942.33
8 $942.33 $106.08 $94.23 $11.85 $930.48
9 $930.48 $106.08 $93.05 $13.03 $917.45
10 $917.45 $106.08 $91.74 $14.33 $903.11
Note: See Columns M 11 $903.11 $106.08 $90.31 $15.77 $887.34
through R for a 30 year 12 $887.34 $106.08 $88.73 $17.34 $870.00
mortgage example. 13 $870.00 $106.08 $87.00 $19.08 $850.92
j. (2.) What is the annual interest expense for the borrower, and the annual interest income for the lender, during
Year 2?
I. Will the effective annual rate ever be equal to the nominal (quoted) rate? Only if the compounding period is equal
to 1 year.
$350.00
$400.00
$450.00
Payment
Payment Distribution
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A B C D E F G H I J K L M N O P Q R
$3,182.38 $2,182.38 $1,000.00
0 1 2 3 4 5273
100
I0.00031054
N273
FV $108.85
Years 0 0.5 1 1.5 2 2.5 3
Periods 0 1.0 2 3.0 4 5.0 6
Cash Flow 0 100 0100 0100
There are two approaches. First, you could simply find the future value of each cash flow using the
period rate and compounded for the appropriate number of periods, as shown below.
$0
$25
$100
$125
Principal
Interest
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A B C D E F G H I J K L M N O P Q R
Periods 0 1 2 3.0 4 5.0 6
PV of CF $90.70 $82.27 $74.62
See which provides the greater future wealth
0 1 2 3 4 5456
850
I0.00018538
N456
N456
I 0.035646% per day
EAR 13.89% > 7% so buy the note.
l. (4.) An important rule is that you should never show a nominal rate on a time line or use it in calculations unless
what condition holds? (Hint: Think of annual compounding, when iNOM = EAR = iPER.) What would be wrong with
your answer to questions l(1) and l(2) if you used the nominal rate (10%) rather than the periodic rate (iNOM/2 = 10%/2
= 5%)? Use the nominal rate only for annual compounding.
l. (2.) What is the PV of the same stream?
Using the first approach, we find the present value of each individual cash flow using the periodic rate
and the number of periods.
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