Mortgage Prelude While Mortgage Prelude serves as a
powerful mortgage calculator that computes such items as
your monthly payment, amortization schedules, interest,
etc., it is so much more than a common mortgage calculator.
One of its most distinguishing features is that it uses the
guidelines set forth by the Federal National Mortgage
Association (a.k.a. Fannie Mae) in its computations. This
is a very important concept because they are the same rules
most lending institutions use when evaluating your request
for a home loan.