問題是你讓他們怎麽算IRR？如果不懂公式，或者沒有一個financial calculator?何況對出租房這種

來源: asd_123 於 2012-03-23 20:03:19 [舊帖] [給我悄悄話] 本文已被閱讀：次

sometimes has both possitive and negative cashflow projects? IRR的公式，對一般人來說，這個r不是那麽容易解出來的

Example

If an investment may be given by the sequence of cash flows

then the IRR $r$ is given by

$\mathrm{NPV} = -4000+\frac{1200}{(1+r)^1} + \frac{1410}{(1+r)^2} + \frac{1875}{(1+r)^3} + \frac{1050}{(1+r)^4} = 0.$

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