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Microsoft® Excel® 2010 Formulas & Functions Inside Out by Helmut Reinke Egbert Jeschke Sara Unverhau, Eckehard Pfeifer, Bodo Fienitz, and Jens Bock

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IRR()

Syntax. IRR(Values,Estimated_Value)

Definition. This function calculates a value of the dynamic investment calculation: The internal interest rate that turns the cash value of all disbursements and deposits in connection with an investment into zero.

Arguments

  • Values (required) The (actual and/or expected) surpluses from disbursements and deposits, arranged without gaps in a column. Each value represents a period (usually one year) in ascending order and without gaps. Negative surpluses have a minus sign.

  • Guess (optional) For mathematical reasons, a calculation of the internal interest rate for more than two periods can only be approximate, and therefore this approximation calculation can lead to different and sometimes nonsensical results (such ...

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