CFA
39 flashcards · Economics · by olaayeko
Do portfolio managers have to align with GIPS
No it is voluntary
Continuously compounding formula
FVN=PV.erN
PV of perpetuity
Perpetual cash flowr{Perpetual\ {cash}\ {flow} \above{2pt} r}rPerpetual cash flow
Money weighted return
IRR of cash flows
Time weighted (geometric) return
(∏i=1nxi)1N\bigg( \prod_{i=1}^n{x_i}\bigg)^{1 \over N}(∏i=1nxi)N1
Harmonic mean
∑i=1n1xi \sum_{i=1}^n{1 \over x_i}∑i=1nxi1
Chebyshev's inequality
1−1k21- {1\over{k^2}}1−k21
Positively skewed highest is mean lowest is mode
Kurtosis of normal distribution
3
Kurtosis of leptokurtic
>3 peak higher than normal
Kurtosis of platykurtic
<3 excess kurtosis negative fat low peak
Correlation coefficient
CovijσiσjCov_{ij}\over {\sigma_i \sigma_j} σiσjCovij
Portfolio variance (covariance)
σA2wA2+σB2wB2+2wAwBCovAB\sigma_A^2{w}_A^2+ \sigma_B^2{w}_B^2 + 2w_Aw_BCov_{AB}σA2wA2+σB2wB2+2wAwBCovAB
Portfolio variance (correlation)
σA2wA2+σB2wB2+2wAwBpABσAσB\sigma_A^2{w}_A^2+ \sigma_B^2{w}_B^2 + 2w_Aw_Bp_{AB}\sigma_A\sigma_BσA2wA2+σB2wB2+2wAwBpABσAσB
Binomial distribution p(x)
nCr×px×(1−p)n−x_nC_r \times p^x \times (1-p)^{n-x}nCr×px×(1−p)n−x
Variance p(x)
n \times p \times (1-p)
Standard normal variable (z)
x−μσ{x - \mu } \over {\sigma}σx−μ
Shortfall/Safety ratio
E(Rp)−RLσp{E(R_p)-R_L \over {\sigma_p}}σpE(Rp)−RL
Continuously compounding rate of return
ln(St+1St)\ln\bigg( {S_t+1 \over S_t} \bigg)ln(StSt+1)
Standard error
σn\sigma \over \sqrt {n} n σ
Confidence interval
Point estimate ± (Reliability factor x Standard Error)
Test statistic (Means)
Sample statistic−Hypothesized valueStandard error of sample statisticSample \, statistic - Hypothesized \, value \over {Standard\,error\,of\,sample\,statistic}StandarderrorofsamplestatisticSamplestatistic−Hypothesizedvalue
Chi Square
(n−1)s2σ2{(n-1)s^2\over\sigma^2}σ2(n−1)s2
F statistic
S12S22S_1^2\over S_2^2S22S12
Capital allocation line
Rf+(E(Ra)−Rfσa)×σaR_f + \bigg({E(R_a)-R_f \over \sigma_a } \bigg) \times \sigma_aRf+(σaE(Ra)−Rf)×σa
The slope of the capital allocation line represents sharp ratio of individual portfolio
Capital market line
Rf+(E(Rm)−Rfσm)×σp R_f + \bigg({E(R_m)-R_f \over \sigma_m } \bigg) \times \sigma_p Rf+(σmE(Rm)−Rf)×σp
The slope of the capital market line represents sharp ratio of market portfolio
Beta formula
Cov(Ri,Rm)σm2Cov(R_i, R_m) \over \sigma_m^2σm2Cov(Ri,Rm)
CAPM
E(Ri)=rf+βi[E(Ri)−Rf]E(R_i) = r_f + \beta_i [E(R_i)-R_f]E(Ri)=rf+βi[E(Ri)−Rf]
SML
Represents values of CAPM graphically, the expected return at various values of Beta
M2
(Rportfolio−Rf)×σmarketσportfolio−(Rmarket−Rf)(R_{portfolio}-R_f) \times{\sigma_{market} \over \sigma_{portfolio}} - (R_{market} - R_f) (Rportfolio−Rf)×σportfolioσmarket−(Rmarket−Rf)
Treynor measure
Rportfolio−RfBetaR_{portfolio} - R_f \over BetaBetaRportfolio−Rf
Jensen's Alpha
Rp−[Rf+βp(RM−Rf)]R_p - [ R_f + \beta_p (R_M-R_f)]Rp−[Rf+βp(RM−Rf)]
Profit maximisation occurs when ..
MR = MC
Own price elasticity
(ΔQxdΔPx)(PxQxd)\bigg({\Delta Q^d_x \over \Delta P_x}\bigg) \bigg({P_x \over Q_x^d}\bigg)(ΔPxΔQxd)(QxdPx)
Relationship between savings investment etc
I + (G-T) + (X-M)
Quantity theory of money
Money supply x Velocity = Inflation x GDP
GDP
I + G + (X-M)