Objectives
Using Excel
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Excel 2003
Bible: Chapter 13
Microsoft:
Building
Formulas Faster
Excel is often
used for financial calculations. Excel has a number of built-in financial
functions. We will look at five of the most useful ones:
Each
financial function uses the other four values as its arguments. The
arguments used in the financial functions are:
PMT is the regular amount that is
paid when repaying a loan or
the amount that is deposited into an investment (like a savings account). It is
always a negative number (it is negative because it is a quantity that
is going out of your checking account, even if it is going into
your savings account!).
RATE is the interest rate per period for the investment. While
interest rates are normally quoted as annual rates, all of the financial
functions depend on a per-period
interest rate. If payments are annual, the rate does not need to be modified.
If payments are semiannual, divide by 2. If payments are quarterly, divide by
4. And if payments are monthly, divide by 12.
NPER is the total number of periods
for the investment. Usually you will be given the number of years and the
number of payments per year. These two numbers must be multiplied together to
determine the number of periods. If payments are semiannual, multiply years by
2 to get the number of payment. If payments are quarterly, multiply years by 4
to get the number of payments. And if payments are monthly, multiply years by
12 to get the number of payments.
PV is the amount of the investment
today. When borrowing money, the present value is the amount of the loan, also
called the principal and is a positive
number. When adding to a savings account, this is the initial balance in the
savings account, and is a negative number.
FV is the future value of the
investment. If you are paying off a loan, you want the future value (amount you
owe at the end of the loan) to be 0. If you are adding to a savings account,
this is the desired savings goal.
TYPE is the number 0 (zero) or 1 and
indicates when payments are due. Zero (or omitted) means at the end of the
period, 1 indicates the beginning of the period.
Updated 2006.04.05