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IRR Logic

  1. #1
    Carrie
    Guest

    IRR Logic

    I have a question on how the IRR function thinks. In the case of where there
    are multiple outflows and inflows at various points in time like below which
    causes multiple results, is the result displayed the number closest to 10%?
    How does it decide what answer to give you?

    Period 1 -1,000
    Period 2 6,000
    Period 3 -11,000
    Period 4 6,000

    Thanks,

    Carrie

  2. #2
    Forum Contributor Lotus123's Avatar
    Join Date
    11-07-2005
    Location
    Texas
    MS-Off Ver
    2007
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    153
    =IRR(values,[guess])

    Microsoft Excel uses an iterative technique for calculating IRR. Starting with the [guess], IRR cycles through the calculation until the result is accurate within 0.00001 percent. If IRR can't find a result that works after 20 tries, the #NUM! error value is returned.

    In most cases you do not need to provide guess for the IRR calculation. If guess is omitted, it is assumed to be 0.1 (10 percent).

  3. #3
    Carrie
    Guest

    Re: IRR Logic

    Right, but what I need to know is when there is more than one possible answer
    to the IRR calculation, which of the answers does it give you - the lowest or
    the one closest to it's starting point (which would be 10% if you omit a
    guess)?

    Thanks,

    Carrie

    "Lotus123" wrote:

    >
    > =IRR(values,[guess])
    >
    > Microsoft Excel uses an iterative technique for calculating IRR.
    > Starting with the [guess], IRR cycles through the calculation until the
    > result is accurate within 0.00001 percent. If IRR can't find a result
    > that works after 20 tries, the #NUM! error value is returned.
    >
    > In most cases you do not need to provide guess for the IRR calculation.
    > If guess is omitted, it is assumed to be 0.1 (10 percent).
    >
    >
    > --
    > Lotus123
    > ------------------------------------------------------------------------
    > Lotus123's Profile: http://www.excelforum.com/member.php...o&userid=28611
    > View this thread: http://www.excelforum.com/showthread...hreadid=486319
    >
    >


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