A Sufficient Condition for a Unique Nonnegative, Internal Rate of Return: A Comment

Abstract

The purpose of this comment is to make a comparison between the sufficient conditions of Soper [3] and of Norstrøm [2] for a unique internal rate of return (IRR). Such a condition is crucial for the implementation of a computer program, as for instance the one presented by Mao and Knoll [1] which makes use of Soper's condition. Therefore, it seems appropriate to investigate if one of the mentioned conditions is superior to the other, so that we could rely only on the more efficient one.