Talk:Documentation/Calc Functions/IRR

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SF Comments

(1) Summary. Replace 1st sentence with “Calculate the internal rate of return for a series of cash flows, iterating to find the rate of return which gives a zero net present value for the cash flows”. Also, suggest delete 2nd sentence as it contains material that should be in the Arguments section.
(2) Returns. Insert “decimal” before “fraction”. Change “a series of investments” to “the series of cash flows”.
(3) Arguments, Values. Are you sure that you can use an array as an argument? I have not managed to do so.
(4) Arguments, Guess. Change “in percentage or fraction” to “as a percentage or decimal fraction”.
(5) Arguments, Warning. I see no need for this to be a warning on the wiki – I would prefer it to be a bullet – consistent with many other pages that highlight error conditions.
(6) Arguments, general. We need to define the constraints on the values. At least one of the cash flows must be negative and at least one positive - to allow the net present value to be zero. The order of the cash flows is significant; make sure that you arrange them in the correct sequence.
(7) Additional details. Include a link to Wikipedia’s page entitled “Internal rate of return”.
(8) Additional details. Might also be worth adding that the result of IRR is the rate at which the NPV() function will return zero with the given values (perhaps formatted as a formula).
(9) Examples. Both formulas refer to A1:A16 – presumably, this should be A1:A6? Also, are we being inconsistent by not having an error example?
(10) Related LibreOffice functions. Should MIRR be included?

--Stevefanning (talk) 2020-11-20T14:30:26 (UTC)