HP 10B

Hewlett-Packard 10B Tutorial
Page 10
1
If a negative CF occurs at the end of a project’s life, then the HP may give an error message, indicating that
there are two IRRs. Enter data, then enter 10 to get the first IRR. Then enter a large
STO IRR/YR
percentage, such as 100 to find other IRR. You might have to experiment with “guesses” to
STO IRR/YR
locate the two IRRs.
Example 3: The Rate of Return Offered by an Investment (IRR)
1
Assume that we invest $1,000 now (t = 0) and then expect to receive an uneven set of cash flows. Here
is the CF time line:
0 1 2 3 4
/))))))))3))))))))3))))))))3))))))))1
-1000 300 400 200 600
What rate of return will we earn? Enter the following:
CLEAR ALL
1000
+/- CF
j
300
CF
j
400 (Hold down CF
j
key to be sure you entered CF
2
.)
CF
j
200
CF
j
600
CF
j
= 16.71%
IRR/YR
You can also determine the NPV of the investment. Leave data entered and then enter the opportunity cost
interest rate, say 8 percent. To find NPV press
8
I/YR
NPV
The NPV of $220.50 is displayed. Thus, the PV of the cash inflows exceeds the cost of the investment
by $220.50.