Profitability Index
An index that attempts to identify the relationship between the costs and benefits of a proposed project through the use of a ratio calculated as:
Investopedia Commentary
A ratio of 1.0 is logically the lowest acceptable measure on the index. Any value lower than 1.0 would indicate that the project's NPV is less then the initial investment. As values on the profitability index increase, so does the financial attractiveness of the proposed project.
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See also: Benefit Cost Ratio, Cash Flow, Discounted Cash Flow, Future Value, NPV