Formulas Revision Flashcards
Variance
(With proba + with historical data)


Simple Interest=
X(1 + rT)
Future Value
X(1 + r)T
Present Value (2)
DF * X

Discount Factor
PV of $1

Net Present Value

PV Perpetuity

PVp2 = value of a perpetuity paying C per year with first payment in T+1 years

PV of an annuity: (3)

- PVp - PVp2
*

PV of an annuity paid at the beginingof the year
PVa * (1 + r)
PVp with growth

PVa with growth

Effective Annual Rate

Effective Monthly Rate

Continuous Compounding
Xer
Continuous discounting
PV= Xe-rT
Real interest rate
(1+r)/(1+pi)
i=real interest rate
r=nominal interest rate
𝜋(pi)=inflation rate

Approximate Yield To Maturity

Relationship formula YTM/PV

Gordon Growth Formula

Stock Price with constant dividend

Return on Equity/Return on investment
= Amount of earnings a dollar of equity creates
EPS= earning per share
Earning growth
Plowback ratio = 1 -payout ratio

Nominal Interest rate =
Real rate + Inflation
Forward Rate

Standard Deviation
Racine carrée of Variance
Inflation rate is written as:
pi
𝜋
Above and Below Par:
Above par = coupon rate > YTM
Below par = coupon rate < YTM
A zero-coupon bond…
Receive money only at maturity
PV of growth opportunities:
P2 - P1
Form reinvesting VS firm paying out
Covariance formula

Expected Portfolio Return
xi = portfolio weight allocated to asset i
yi = mean/expected return on asset i

Variance of portfolio
ex. with 2 assets

Beta asset
- If you slightly increase the portfolio weight on stock i then the overall portfolio variance would increase by an amount proportional to Bi
- If Beta is 0.4, for every 1% rise (fall) in the market, you expect the stock to rise (fall) by 0.4%
- B > 1 = Aggressive; moves with the market but with greater amplitude

Beta portfolio

US risk premium
Difference between mean annual stock market return and T-Bill return
Portfolio weights and risk free asset

Annual (arithmetic) return
(P1 - P0 + D1) / P0
P1 = new price
P0 = ancient price
D1 = dividend
Capital Gain =
(VA - VD) / VD) * 100
Dividend Yield

Excess Return
R - Rf
(annual return - risk-free)
Present Value of Growth Opportunities
Difference in value between the firm that plows back and the one who does not
Modified Duration (or Volatility)

Yield changes by (delta)y

Duration/Macaulay Duration

Risk free asset property
- Rf Variance and Covariance = 0
CAPM (Capital Asset Pricing Model)


Sharpe Ratio

Correlation
