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Chapter 18
Financial Mathematics
Learning Objectives
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Explain why a dollar today is worth more
than a dollar in the future.
Define future value and present value.
Explain the difference between an ordinary
annuity and an annuity due.
Calculate the future value and present value
of an annuity.
Decisions for Financial Managers
1. Where should we invest our funds?
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i.e. What types of equipment, buildings, services,
programs, or other opportunities should we
invest?
2. How will we finance our investment needs?
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Will we use debt, equity, or both?
Investment and Financing
• Investment decisions involve expending funds
today while expecting to realize returns in the
future
• Financing decisions involve the receipt of
funds today in return for a promise to make
payments in the future
• Therefore, manager’s major task is evaluating
the relative attractiveness of alternative
investment and financing opportunities
Time Value of Money
• Concept of time value money:
– Payment that is made or received in the first year
has a greater value than an identical payment made
or received in the tenth year
– “A dollar today is worth more than a dollar
tomorrow.”
• The idea that the value of money changes over
time is absolutely critical to investment and
financing decisions.
Time Value of Money
• If we accept that a dollar today is worth more
than a dollar received in the future, how can
we determine what that difference is?
– We must determine the cost for money
– e.g. the interest rate associated with borrowing, the
opportunity cost of investment, etc.
• Interest rate - the price for the commodity
called money (e.g. 10% per year)
Present Value & Future Value
• If the interest rate is 10%, a dollar received 1
year from now is only worth $0.9091 in
today’s dollar.
– This concept is called “Present Value”
• Conversely, if the interest rate is 10%, $0.9091
today will be worth exactly $1 one...