• |
|
|
|
|
|
|
|
mean |
| Σfixi |
|
|
|
|
|
|
|
|
|
|
| ||
X = |
|
|
|
|
| ||
|
| Σfi |
|
|
|
|
|
• |
|
|
|
|
|
|
|
|
|
|
|
| Σfixi2 – (Σfi) |
| 2 |
standard deviation | Sx | = | X | ||||
|
|
|
|
| Σfi – 1 | ||
• |
|
|
|
|
|
|
|
standard error Sx | = | Σfi |
|
|
| ||
Personal Finance
Tax-Free Retirement Account (IRA) or Keogh Plan
•n = the number of years to retirement.
•i = the compunded annual interest.
•PMT = the earnings used for investment (and taxes).
•FV= future value.
•tax= the percent tax expressed as a decimal.
For ordinary taxable investment:
•
FV = | [1 + i(1 – tax)]{[1 + i(1 – tax)]n – 1} | |
| i(1 – tax) |
|
For tax-free investment:
•
PMT( )[( )n – 1] FV =
i
Stock Portfolio Evaluation and Analysis
•n = the number of issues held.
•Pi = the current market price / share of a stock.
•Si = the number of shares of a stock held.
•βi = the beta coefficient of an individual stock.
•T = the total present value of a portfolio.
161
