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小蛋糕 · 2020年03月07日

Reading 19 Capital Budgeting ,原版书课后题第32题

  • 原文是这么写的:When reviewing her work, Simpson’s supervisor provides the following comments. “I note that you are relying heavily on the NPV approach to valuing the investment decision. I don’t think you should use an IRR because of the multiple IRR problem that is likely to arise with the Bayonne Pharma project. However, the equivalent annual annuity would be a more appropriate measure to use for the project than the NPV. I suggest that you compute an EAA.”
  • 答案这么写的:32 A is correct. Both of the supervisor’s comments are incorrect. Because the Bayonne Pharma project is a conventional project (an outflow followed by inflows), the multiple IRR problem cannot occur. The EAA is preferred over the NPV when dealing with mutually exclusive projects with differing lives, a scenario which is not relevant for this decision. The Bayonne Pharma project is free-standing, so the NPV approach is appropriate.
  • 我的疑问是:
  1. multiple IRR problem是什么时候出现的?
  2.  free-standing 是指什么样特征的项目?NPV为什么会更适用于这个项目?谢谢!
1 个答案

Debrah_品职答疑助手 · 2020年03月08日

同学你好。

1. multiple IRR problem指的是如果期间出现现金净流出和净流入交替波动,会出现IRR多解的情况。即NPV=0的折现率有多个。譬如,原版书(22页)举了个例子,CF0=-1000,CF1=5000,CF2=-6000,此时计算出来IRR1=1=100%;IRR2=2=200%。有时候也会出现没有IRR的情况“no-IRR problem”,原版书也举了例子,有时间可以看一下。题目中的项目是标准的期初投入,期间和期末现金流入的project,不涉及现金流的交替波动,因此不会出现multiple IRR problem.

2. EAA法用于比较多个不同期限的互斥项目,题目只提到了一个独立的项目“free-standing project”,没有涉及多个项目,所以不需要使用EAA法,NPV方法就可以了。

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