I would like to know if the numerical method used to compute the IRR function in Excel is known.
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I would like to know if the numerical method used to compute the IRR function in Excel is known.
Excel documentation states it uses Newton Raphson method for IRR calculation
But my test with sample data using Excel IRR and my own IRR code show different results using default seed value in a number of cases that leads me to think it is an altered form of Newton Raphson method they are applying to Excel IRR function