User Manual

Appendix B: Reference Information 390
Internal rate of return is dependent on the values of the initial cash flow (
CF
0
) and subsequent
cash flows (
CFj).
i = I% ÷ 100
Interest Rate Conversions
100 (e
CP x 1+()ln×
1)–×
.01 × Nom ÷ CP
100 CP [×× e
1 CP÷ x 1+()ln×
1 ]–
Days between Dates
With the
dbd( function, you can enter or compute a date within the range Jan. 1, 1950, through
Dec. 31, 2049.
Actual/actual day-count method (assumes actual number of days per month and actual number
of days per year):
dbd( (days between dates) = Number of Days II - Number of Days I
4
Eff =
where:
x
=
4Nom =
where:
x
=.01 × Eff
Eff
=
effective rate
CP
=
compounding periods
Nom
= nominal rate
Number of Days I = (Y1-YB) × 365
+ (number of days
MB to M1)
+
DT1
+
Number of Days II = (
Y2-YB) × 365
+ (number of days
MB to M2)
+
DT2
+
Y1 YB–()
4
------------------------
Y2 YB–()
4
------------------------