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The Basics of
Capital Budgeting
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Topics Overview
Methods NPV IRR, MIRR
Payback, discounted payback
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What is capital budgeting?A process for determining the
profitability of a capital investment.
Long-term decisions; involve largeexpenditures.
Very important to firms future.
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Steps in Capital Budgeting Estimate cash flows (inflows &
outflows).
Assess risk of cash flows.
Determine r = WACC for project.
WACC = Weighted Avg. Cost of Capital
Evaluate cash flows.
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What does this represent?
= n
t = 0
CFt
(1 + r)t
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NPV: Sum of the PVs of all
cash flows.
Cost often is CF0 and is negative.
NPV =n
t = 0
CFt
(1 + r)t
NPV =n
t = 1
CFt
(1 + r)t- CF0
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Cash Flows for project L and
project S
10 8060
0 1 2 310%
Ls CFs:
-100
70 2050
0 1 2 3
10%Ss CFs:
-100
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Whats project Ls NPV?
10 8060
0 1 2 310%
Ls CFs:
-100
= NPVL
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Whats project Ls NPV?
10 8060
0 1 2 310%
Ls CFs:
-100
9.09
49.59
60.11
18.79 = NPVL NPVS = $19.98.
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Which project should be chosen?
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What if mutually exclusive? L or S?What if independent projects? L or S?
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Calculator Solution: Enter
values in CF register for L.
-100
10
60
80
10
CF0
CF1
NPV
CF2
CF3
I = 18.78 = NPVL
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Rationale for the NPV Method NPV = PV inflows Cost
This is net gain in wealth, so acceptproject if NPV > 0.
Choose between mutually exclusiveprojects on basis of higher NPV. Addsmost value.
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Using NPV method, which project(s)
should be accepted? If project S and L are mutually
exclusive, accept S because
NPVs > NPVL .
If S & L are independent, accept both;NPV > 0.
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Internal Rate of Return: IRR
0 1 2 3
CF0 CF1 CF2 CF3Cost Inflows
IRR is the discount rate that forcesPV inflows = cost. This is the sameas forcing NPV = 0.
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NPV: Enter r, solve for NPV.
IRR: Enter NPV = 0, solve for IRR.
= NPVn
t = 0
CFt
(1 + r)t
.
= 0n
t = 0
CFt
(1 + IRR)t.
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Whats project Ls IRR?
10 8060
0 1 2 3IRR = ?
-100
PV3
PV2
PV1
0 = NPV Enter Cash Flows in CF, thenpress IRR:
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Whats project Ls IRR?
10 8060
0 1 2 3IRR = ?
-100
PV3
PV2
PV1
0 = NPV Enter Cash Flows in CF, thenpress IRR: IRRL = 18.13%.
IRRS = 23.56%.
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40 4040
0 1 2 3
-100
Find IRR if CFs are constant:
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40 4040
0 1 2 3
-100
Or, with CF, enter CFs and pressIRR = 9.70%.
3 -100 40
9.70%
N I/YR PV PMT
INPUTS
OUTPUT
Find IRR if CFs are constant:
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Decisions on Projects S and Lper IRR
IRRS = 18% IRRL = 23% WACC = 10%
If S and L are independent, what to do?
If S and L are mutually exclusive, whatto do?
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Rationale for the IRR Method
If IRR > WACC, then the projects rateof return is greater than its cost-- some
return is left over to boost stockholdersreturns.
Example:WACC = 10%, IRR = 15%.
So this project adds extra return toshareholders.
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Reinvestment RateAssumptions
NPV assumes reinvest at r (opportunitycost of capital).
IRR assumes reinvest CFs at IRR.
Reinvest at opportunity cost, r, is morerealistic, so NPV method is best. NPV
should be used to choose betweenmutually exclusive projects.
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Modified Internal Rate ofReturn (MIRR)
MIRR is the discount rate which causesthe PV of a projects terminal value (TV)
to equal the PV of costs. TV is found by compounding (FV)
inflows at the WACC.
Thus, MIRR assumes cash inflows arereinvested at the WACC.
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10.0 80.060.0
0 1 2 3
10%
66.0
12.1158.1
-10010%
10%
TV inflows
-100
PV outflows
MIRR for project L: First, findPV and TV (r = 10%)
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Second, find discount rate thatequates PV and TV
MIRR = 16.5% 158.1
0 1 2 3
-100
TV inflowsPV outflows
MIRRL = 16.5%
$100 = $158.1(1+MIRRL)
3
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To find TV with calculator:Step 1, find PV of Inflows
First, enter cash inflows in CF register:
CF0 = 0, CF1 = 10, CF2 = 60, CF3 = 80
Second, enter I = 10.
Third, find PV of inflows: Press NPV = 118.78
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Step 2, find TV of inflows.
Enter PV = -118.78, N = 3, I = 10
CPT FV = 158.10 = FV of inflows.
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Step 3, find PV of outflows.
For this problem, there is only oneoutflow, CF0 = -100, so the PV of
outflows is -100.
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Step 4, find IRR of TV ofinflows and PV of outflows.
Enter FV = 158.10, PV = -100, N = 3.
CPT I = 16.50% = MIRR.
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Why use MIRR versus IRR?
MIRR correctly assumes reinvestment atopportunity cost = WACC. MIRR also
avoids the problem of multiple IRRs. Managers like rate of return
comparisons, and MIRR is better for this
than IRR.
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What is the payback period?
The number of years required torecover a projects cost,
or how long it takes to get thebusinesss money back.
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What is the payback period?
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50 5050
0 1 2 3
-100
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What is the payback period?
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40 4040
0 1 2 3
-100
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What are the payback periodsfor projects L and S?
10 8060
0 1 2 310%
Ls CFs:
-100
70 2050
0 1 2 3
10%Ss CFs:
-100
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Payback for project L
10 8060
0 1 2 3
-100
=
CFtCumulative -100 -90 -30 50
PaybackL 2 + 30/80 = 2.375 years
0
2.4
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Payback for project S
70 2050
0 1 2 3
-100CFt
Cumulative -100 -30 20 40
PaybackS 1 + 30/50 = 1.6 years
0
1.6
=
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Strengths and Weaknesses ofPayback
Strengths:
Provides an indication of a projects risk
and liquidity. Easy to calculate and understand.
Weaknesses:
Ignores the TVM. Ignores CFs occurring after the payback
period.
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10 8060
0 1 2 3
CFt
Cumulative -100 -90.91 -41.32 18.79Discountedpayback 2 + 41.32/60.11 = 2.7 yrs
PVCFt -100
-100
10%
9.09 49.59 60.11
=
R i i 2 7
Discounted Payback: Usesdiscounted rather than raw CFs.