Returns the interest rate for a series of unequal cash flows at regular intervals (implicit reinvestment rate) (Double).
|values()||The array of cash flow values (Double).|
|guess||(Optional) The estimate to the value returned by this function (Double).|
|* The internal rate of return is the interest rate received for an investment consisting of payments and receipts that occur at regular intervals.|
* The first value in the "values()" array must be negative ??
* The "values()" must contain at least one negative value (a payment) and one positive number (a receipt)
* If "guess" is left blank, then 0.1 (10%) is used.
* It is important to ensure that the values in your array are in the correct order.
* This function uses iteration in it calculation and if the function cannot find a result after 20 tries, to within 0.001% it fails ??
* You can use the MIRR function to return the internal rate of return for a series of unequal cash flows at regular intervals (explicit reinvestment rate).
* The equivalent Excel function is Application.WorksheetFunction.IRR
* The equivalent .NET function is Microsoft.VisualBasic.Financial.Irr
* For the Microsoft documentation refer to docs.microsoft.com
Dim ardoubles(3) as Double
ardoubles(0) = -20
ardoubles(1) = 10
ardoubles(2) = 10
ardoubles(3) = 20
Irr(ardoubles) = 0.38367
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