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  1. 1 Przegląd Statystyczny

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  1. 1 2007

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  1. 1 Forys I.

  2. 1 Purczynski J.

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ESTIMATION OF INVESTMENT RETURN PERIOD (T)

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Purczynski J., Forys I.
Przegląd Statystyczny
|
2007
|
vol. 54
|
issue 2
47-55
EN
Return period is often used by investors as an index of investment effectiveness taking into account the time value of money. In order to determine this parameter the equation NPV=0 needs to be solved as a function of 't'. As it is shown it is an exponential equation for which no solution in an analytical form can be obtained and only iterative methods can be used: secant, tangent or bisection methods. The field literature recommends determining consecutive cash flows and comparing them with incurred expenditures (to an accuracy of a unit used for consecutive payments). The authors proposed formulas which are easy to use and burdened with small error, and which determine investment return period.
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