130 BA II PLUS™ Calculator
When There Are Two or More Sign Changes
When a sequence of cash flows has two or more sign changes,
there may be multiple solutions for
IRR
.
•
There is at least one solution.
•
There may be as many solutions as there are sign changes.
If there are multiple solutions, the calculator displays the one
closest to zero. However, the displayed solution has no
financial meaning. Thus, you should use caution in making
investment decisions based on an
IRR
computed for a cash-flow
stream with more than one sign change.
The following time line shows a sequence of cash flows with
three sign changes. There may be one, two, or three solutions
for
IRR
.
When Solving a Complex Problem
When you are solving very complex cash-flow problems, the
calculator may not be able to find
IRR
even if a solution exists.
When this is the case, the calculator displays
Error 7
(iteration
limit exceeded).
Sign
change
Sign
change
Sign
change
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