additional topic 6-capital rationing
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A D D I T I O N A L N O T E S F O R T O P I C 6
CAPITAL RATIONING
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Capital Rationing
Suppose that you have evaluatedfive capital investment projects for
your company.
Suppose that the VP of Finance hasgiven you a limited capital budget.
How do you decide which projectsto select?
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Capital Rationing
You could rank the projects by IRR:
IRR
5%
10%
15%
20%
25%
$
1
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Capital Rationing
You could rank the projects by IRR:
IRR
5%
10%
15%
20%
25%
$
1 2
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Capital Rationing
You could rank the projects by IRR:
IRR
5%
10%
15%
20%
25%
$
1 2 3
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Capital Rationing
You could rank the projects by IRR:
IRR
5%
10%
15%
20%
25%
$
1 2 3 4
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Capital Rationing
You could rank the projects by IRR:
IRR
5%
10%
15%
20%
25%
$
1 2 3 4 5
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Capital Rationing
You could rank the projects by IRR:
IRR
5%
10%
15%
20%
25%
$
1 2 3 4 5
$X
Our budget is limited
so we accept onlyprojects 1, 2, and 3.
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Capital Rationing
You could rank the projects by IRR:
IRR
5%
10%
15%
20%
25%
$
1 2 3
$X
Our budget is limited
so we accept onlyprojects 1, 2, and 3.
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Capital Rationing
Ranking projects by IRR is notalways the best way to deal witha limited capital budget.
Its better to pick the largestNPVs.
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Problems with Project Ranking
1) Mutually exclusive projects of unequalsize (the size disparityproblem)
The NPV decision may not agree withIRR or PI.
Solution: select the project with thelargest NPV.
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Size Disparity Example
Project Ayear cash flow
0 (135,000)1 60,0002 60,0003 60,000
required return = 12%IRR = 15.89%NPV = $9,110
PI = 1.07
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Size Disparity Example
Project Byear cash flow
0 (30,000)1 15,0002 15,0003 15,000
required return = 12%IRR = 23.38%NPV = $6,027
PI = 1.20
Project Ayear cash flow
0 (135,000)1 60,0002 60,0003 60,000
required return = 12%IRR = 15.89%NPV = $9,110
PI = 1.07
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Size Disparity Example
Project Byear cash flow
0 (30,000)1 15,0002 15,0003 15,000
required return = 12%IRR = 23.38%NPV = $6,027
PI = 1.20
Project Ayear cash flow
0 (135,000)1 60,0002 60,0003 60,000
required return = 12%IRR = 15.89%NPV = $9,110
PI = 1.07
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Problems with Project Ranking
2) The time disparityproblem with mutuallyexclusive projects.
NPV and PI assume cash flows are
reinvested at the required rate of return forthe project.
IRR assumes cash flows are reinvested atthe IRR.
The NPV or PI decision may not agree withthe IRR.
Solution: select the largest NPV.
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Time Disparity Example
Project Ayear cash flow0 (48,000)1 1,2002 2,400
3 39,0004 42,000
required return = 12%
IRR = 18.10%NPV = $9,436PI = 1.20
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Time Disparity Example
Project Byear cash flow0 (46,500)1 36,5002 24,000
3 2,4004 2,400
required return = 12%
IRR = 25.51%NPV = $8,455PI = 1.18
Project Ayear cash flow0 (48,000)1 1,2002 2,400
3 39,0004 42,000
required return = 12%
IRR = 18.10%NPV = $9,436PI = 1.20
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Time Disparity Example
Project Byear cash flow0 (46,500)1 36,5002 24,000
3 2,4004 2,400
required return = 12%
IRR = 25.51%NPV = $8,455PI = 1.18
Project Ayear cash flow0 (48,000)1 1,2002 2,400
3 39,0004 42,000
required return = 12%
IRR = 18.10%NPV = $9,436PI = 1.20
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Mutually Exclusive Investmentswith Unequal Lives
Suppose our firm is planning toexpand and we have to select oneof two machines.
They differ in terms of economiclife and capacity.
How do we decide which machine
to select?
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The after-tax cash flows are:
Year Machine 1 Machine 2
0 (45,000) (45,000)
1 20,000 12,000
2 20,000 12,000
3 20,000 12,000
4 12,000
5 12,000
6 12,000
Assume a required return of 14%.
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Step 1: Calculate NPV
NPV1 = $1,433
NPV2 = $1,664
So, does this mean #2 is better?
No! The two NPVs cant be
compared!
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Step 2: Equivalent AnnualAnnuity (EAA) method
If we assume that each project will bereplaced an infinite number of times inthe future, we can convert each NPV to an
annuity.
The projects EAAs canbe compared todetermine which is the best project!
EAA: Simply annuitize the NPV over theprojects life.
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EAA with your calculator:
Simply spread the NPV over the life of theproject
Machine 1: PV = 1433, N = 3, I = 14,
solve: PMT = -617.24.
Machine 2: PV = 1664, N = 6, I = 14,
solve: PMT = -427.91.
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EAA1 = $617
EAA2 = $428
This tells us that: NPV1 = annuity of$617 per year.
NPV2 = annuity of$428 per year.
So, weve reduced a problem withdifferent time horizons to a couple ofannuities.
Decision Rule: Select the highest EAA.We would choose machine #1.
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Step 3: Convert back toNPV
Assuming infinite replacement, theEAAs are actually perpetuities. Get thePV by dividing the EAA by the requiredrate of return.
NPV 1 = 617/.14 = $4,407
NPV 2 = 428/.14 = $3,057
This doesnt change the answer, ofcourse; it just converts EAA to an NPVthat can be compared.