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# IRR

## Name

IRR --

## Synopsis

    IRR(values[,guess])

## Description

IRR calculates and returns the internal rate of return of an investment. This function is closely related to the net present value function (NPV). The IRR is the interest rate for a serie of cash flow where the net preset value is zero.

@values contains the serie of cash flow generated by the investment. The payments should occur at regular intervals. The optional @guess is the initial value used in calculating the IRR. You do not have to use that, it is only provided for the Excel compatibility.

This function is Excel compatible.

## Examples

Let us assume that the cells A1:A8 contain the numbers -32432, 5324, 7432, 9332, 12324, 4334, 1235, -3422. Then

IRR(A1:A8) returns 0.04375.

## See also

FV, NPV, PV.

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