•

 

 

 

 

 

 

 

 

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 =

-----------------------PMT

[1 + i(1 – tax)]{[1 + i(1 – tax)]n – 1}

 

i(1 – tax)

 

For tax-free investment:

•

PMT( )[( )n – 1] FV = ------------ 1 + i 1 + i

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.

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