HP 30b programs Interest Rate conversions Negative Periods per Year and Fractional Periods per year

[Gene Wright]

These programs allow the use of negative values for "Periods per year" when converting interest rates. They also allow the use of fractional periods per year. End of period compounding assumed.

First program: Computing the effective rate. Inputs: Nominal rate, =, number of periods.

/

Ans

) Swap

1

+

) Swap

Y^X

1

-

Shift+Stop

When run from the program catalog, key 0.1224 = 2 +/- = =

Result shown is 0.1346

2nd program: Effective rate to nominal rate. Inputs: Effective rate, =, number of periods.

=

=

shift+UP

1

+

) Swap

1/x

Y^X

1

-

*

Shift+STOP

Inputs: 0.1346 = 2 +/- = =

Outputs 0.1224

Inputs: 0.1346 = 360 = 210 / =

Outputs: 0.1310

Edited: 2 May 2011, 3:15 p.m.

[Bart (UK)]

Hi Gene,

Are you going to put it in the articles area? That will make it easier to find in future :). Thanks

edit: I see it's there now, thanks.

Edited: 4 May 2011, 7:07 a.m.