Variable Rate Mortgages - HP 12c Solutions Handbook

Variable Rate Mortgages

As its name suggests, a variable rate mortgage is a mortgage loan which
provides for adjustment of its interest rate as market interest rates change.
As a result, the current interest rate on a variable rate mortgage may differ
from its origination rate (i.e., the rate when the loan was made). This is the
difference between a variable rate mortgage and the standard fixed
payment mortgage, where the interest rate and the monthly payment are
constant throughout the term.
Under the agreement of the variable rate mortgage, the mortgage is
examined periodically to determine any rate adjustments. The rate
adjustment may be implemented in two ways:
1. Adjusting the monthly payment.
2. Modifying the term of the mortgage.
The period and limits to interest rate increases vary from state to state.
Each periodic adjustment may be calculated by using the HP-12C with the
following keystroke procedure. The original terms of the mortgage are
assumed to be known.
1. Press
-471.33
-51,665.07
3.00
-494.89
-52,215.34
4.00
-519.64
-52.523.34
5.00
-545.62
-52,542.97
-572.90
and press CLEAR
34
2nd year monthly payment.
Remaining balance after 2nd year.
Year 3
3rd year monthly payment.
Remaining balance after 3rd year.
Year 4
4th year monthly payment.
Remaining balance after 4th year.
Year 5
5th year monthly payment.
Remaining balance after 5th year.
Monthly payment for remainder of
term.
.