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Money deposited in a bank account will earn interest income, so most people prefer to receive money today rather than the same amount in the future – this concept is referred to as “present discounted value”.
The required rate of return (aka discount rate) on investment is determined by three main factors:
Discount Rate = Risk Free Rate + Inflation Premium + Risk Premium
· Risk-Free Rate: the rate earned on a risk-less investment (U.S. Treasury Note)
· Inflation Premium: required return to account for the rise in the general level of prices for goods and services (purchasing power falls)
· Risk Premium: required return for being exposed to various types of investment risk; higher risk = higher risk premium; lower risk = lower risk premium
Present Value is today’s value of a cash flow that will be received in the future.
PV = FV
(1 + r) N
PV = Present Value
FV = Future Value
r = Discount Rate
N = # of years
Example:
Given a 10% discount rate, calculate the present value of a $100 cash flow that will be received in 3 years.
PV = $100 = $75.13
(1+.10)3
Future Value is the amount to which current cash flow will grow over a specific period at a specific interest rate:
FV = PV x (1 + i) N
PV = Present Value
FV = Future Value
i = interest rate
N = # of years
Example:
Calculate the FV of a $250 investment at the end of 5 years if it earns an annual interest rate of 8% FV = $250 x (1+.08)5 = $367.33
Perpetuity is a constant stream of identical cash flows over an infinite period of time. The formula for determining the present value of a perpetuity is as follows:
PV = CF+ CF + CF + ….. = CF
(1+r)1(1+r)2 (1+r)3 r
PV = Present Value
CF = Cash Flow
r = Discount Rate
British console bonds and most preferred stocks are examples of perpetuities.
Example:
Assume that IBM’s preferred stock pays an annual dividend of $5.00 and plans to continue this policy forever. Given an 8% discount rate, what is the value of IBM's preferred stock?
PV = $5.00/8% = $62.50
It is common to evaluate cash flow streams that are not equal from period to period.
Example:
Calculate the present and future values given a 10% discount rate:
PV = $0 + $100 + $500 + $0+ $300 = $709.03
(1+.10)0(1+.10)1 (1+.10)2 (1+.10)3 (1+.10)4
FV = ($0 x 1.14) + ($100 x 1.13) + ($500 x 1.12) + ($0 x 1.11) + ($300 x 1.10) = $1,038.10
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