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|
Appendix G
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|
HP-80 Calculation Formulas
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|
| Unless otherwise stated: |
n
|
 =
|
Number of time periods
| |
|
| |
i
|
=
|
periodic interest rate expressed as a decimal
| |
|
| |
PMT
|
=
|
payment or deposit
| |
|
| |
PV
|
=
|
present value or principal
| |
|
| |
FV
|
=
|
future value
| |
|
| |
I
|
=
|
interest amount
| |
|
|
Compound Interest
|
|
|
|
Annuity
|
|
|
|
Add on Interest Rate to Annual Percentage Rate
|
|
|
r = decimal Add on rate
|
|
|
|
|
APR = 1200iWhere i is the solution for the above equation.
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|
Bond Calculations
|
|
|
n
|
=
|
total number of days between purchase and maturity
| |
|
|
INTR
|
=
|
decimal coupon rate (on annual basis)
| |
|
|
YTM
|
=
|
annual yield to maturity in decimal
| |
|
|
Bond
|
=
|
bond price
| |
|
|
If n < 182.5
|
|
|
|
