EQUATIONS Flashcards
Net Worth
Assets - Liabilities
Current Ratio
Current Assets / Current Liabilities
Emergency Fund
Current Assets / Non-discretionary Expenses
Housing Ratio 2: Housing and all other debt ratio
Monthly Housing Costs (P+I+T+I) + all other recurring debt payments / Monthly gross income
<= 36%
ROI
(ending investments - beginning investment - savings - gifts received) / (average invested assets)
average invested assets = (beginning investments + ending investments) /2
savings = annual salary - fixed expenses - variable expenses
Savings Ratio
= Annual Savings (EE + ER contributions) \ Annual Gross Income
ARM (Adjustable Rate Mortgage)
= current adjustable mortgage rate + X)
X = 2/X
Housing Ratio 1
Monthly Housing Costs (P+I+T+I) / Monthly Gross Income
<= 28%
Margin Call
loan amount / (1 - maintenance margin)
loan = stock price * (1 - initial margin requirement)
Total Expected Return
= (expected return * probability of return) + (expected return * probability of return)….
coefficient of variation
CV = Standard deviation / Average Return
Covariance
COV = (std dev A) * (std dev B) * (correl coeff AB)
Correlation Coefficient
Correlation coeff AB = COV AB / (std dev A)*(std dev B)
Capital Market Line CML
Rp = Rf = std dev (p) * ((Rm - Rf)/ std dev (m))
Information Ratio
IR = (Rp - Rb)/ std dev (A)
Rp = portfolios actual return
Rb = return of the benchmark
Rp - Rb = excess return
Std dev A = tracking error of active return
Treynor Index
Tp = Rp - Rf / Bp
Rp = realized return on the portfolio
Rf = risk free rate of return
Bp = beta of portfolio
Jensen’s Alpha
ALPHA p = Rp - {Rf + (Rm - Rf)Bp]
Rp = realized portfolio return
Rf = risk-free rate of return
ALPHA p = alpha, the intercept that measures the managers contributions to the portfolio return
Bp = beta of the portfolio
Rm = expected return on the market
Holding Period Return
((selling price - purchase price) +/- CFs) / (beginning)
Dividends: +
Margin: -
taxes: -
Effective Annual Rate (EAR)
= (1 + i/n)^n - 1
Arithmetic Mean
= a1 + a2 + a3 + an / n
Geometric Mean
n SQRT a1a2…an
a1= set of given stock prices over period of time
Weighted Average Share Price
(# of shares* share P) + (# of shares * share P)… / (Share P + Share P +…)
Weighted Average Portfolio Return
= (FMV/TPV * % return) + (FMV/TPV * % return)…
Weighted Average Portfolio Beta
= (FMV/TPV * Beta) + (FMV/TPV * Beta)…
Dividend Discount Model
V = D1(*1+g) / (r - g)
r = required rate of return g = dividend growth rate D1 = Next period's dividend = D0(1+g)
Expected Rate of Return
r = (D1 (*1+g)/ p) + g
r = rate of return p = market price v = value
P/E Ratio
- represents how much an investor is willing to pay for reach dollar of earnings
- measure of the stocks price to it’s earnings
useful to value a stock if the firm pays no dividends
AKA P/E multiplier
= Price per Share / EPS
Div 0 = EPS * (1 - retention)
P/E Ratio
Price per Share / EPS
Price / Earnings to Growth (PEG) Ratio
= Stocks PE Ratio / 3-5 year growth rate earnings
Dividend Payout Ratio
= Common Stock Dividend / Earnings Per Share
Return on Equity (ROE)
= EPS / stockholders equity per share
stockholders equity per share = total equity / shares outstanding