FIN222 Lecture Notes - Lecture 6: Net Present Value

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30 May 2018
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LECTURE 6. INVESTMENT
DECISION RULES
Investment Decisions
Objective
To select investments in real asets that will increase the value
of the firm.
Net Present Value (NPV)
Apply the concept of Valuation Principle:
𝑁𝑃𝑉 = 𝑃𝑉(𝐵𝑒𝑛𝑒𝑓𝑖𝑡𝑠) – 𝑃𝑉(𝐶𝑜𝑠𝑡𝑠)
NPV Decision Rule:
If mutually exclusive, choose the one with highest
positive NVP
If independent:
o Accept positive NPV
o Reject negative NPV
As long as NPV is positive, the
decision will increase value of the firm
and is a good decision
Advantage: Correspond directly to the
impact of the project on the firm’s
value:
positive NVP = $ increase
negative NPV = $ decrease
Disadvantage: Relies on an accurate
estimation of the discount rate (r)
Payback Period
Payback Investment Rule: you should only accept a project if
its CFs pay back its initial investment within a pre-specified
period (aka cut-off point):
If mutually exclusive, choose the one with shortest
payback period (that is less than cut-off point)
If independent:
o Accept when shorter than cut-off point
o Reject when longer than cut-off point
Standard Payback Period:
1. calculate payback period: the amount of time it takes
to pay back the initial investment
Advantage:
Simple to compute
Favour liquidity
Disadvantage: Payback rule is not as
reliable as the NPV rule because:
It ignores the time value of
money
It ignores CFs after the
payback period
No guidance on the right
payback cut-off
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Document Summary

To select investments in real asets that will increase the value of the firm. If mutually exclusive, choose the one with highest positive nvp. If independent: accept positive npv, reject negative npv. Payback investment rule: you should only accept a project if its cfs pay back its initial investment within a pre-specified period (aka cut-off point): If mutually exclusive, choose the one with shortest payback period (that is less than cut-off point) If independent: accept when shorter than cut-off point, reject when longer than cut-off point. Standard payback period: calculate payback period: the amount of time it takes to pay back the initial investment. As long as npv is positive, the decision will increase value of the firm and is a good decision. Advantage: correspond directly to the impact of the project on the firm"s value: positive nvp = $ increase, negative npv = $ decrease. Disadvantage: relies on an accurate estimation of the discount rate (r)

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