HP 12C - Page 162

161
•
mean
•
standard deviation
•
standard error
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:
•
For tax-free investment:
•
Stock Portfolio Evaluation and Analysis
• n = the number of issues held.
• P
i
= the current market price / share of a stock.
• S
i
= the number of shares of a stock held.
• β
i
= the beta coefficient of an individual stock.
• T = the total present value of a portfolio.
X
Σ f
i
x
i
Σ f
i
-----------=
Sx
Σ f
i
x
i
2
Σ f
i
()X
2
–
Σ f
i
1–
-------------------------------------
=
S
x
Σ f
i
=
FV
PMT
i1 tax–()
------------------------ 1 i 1 t a x–()+[]1i1tax–()+[]
n
1–{}=
FV
PMT
i
-------------1 i+()1i+()
n1–
[]=