Sometimes, however, a project might have more than one IRR or even no IRR.
然而有些时候一个项目可能具有多个IRR或者没有IRR。
To check whether a project has more than one IRR, you can vary the initial guess of the project's IRR (say from -90 percent to 90 percent).
要检查一个项目是否有更多 IRR 你可以变化项目的 IRR 初始预测值(从 -90% 到 90%).
If a project has a unique IRR, the IRR has a nice interpretation.
如果一个项目有唯一的IRR IRR就有很好的解释。
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