Exam 3 Flashcards
Asset Allocation
How an investor spreads portfolio dollars among assets.
Correlation
The tendency of the returns on two assets to move together.
Moving up and down together - Positive correlation
Moving opposite directions together - Negative correlation
The lower the correlation, the greater the gain from diversification.
Efficient Portfolio
A portfolio that offers the highest return for its level of risk. A portfolio plotted above the minimum variance portfolio.
Portfolio
Group of assets such as stocks and bonds held by an investor.
Investment Opportunity Set
Collection of possible risk-return combinations available from portfolios of individual assets.
Markowitz Efficient Frontier
The set of portfolios with the maximum return for a given standard deviation.
The set of risky portfolios with the minimum standard deviation for a given return.
Principle of Diversification
Spreading an investment across a number of assets will eliminate some, but not all, of the risk.
Portfolio Variance Calculation (Example of Three stocks)
(Squared % invested stock A x Squared standard deviation stock A) +
(Squared % invested stock B x Squared standard deviation stock B) +
(Squared % invested stock C x Squared standard deviation stock C) +
(2 x % Invested Stock A x % Invested Stock B x % Invested Stock C x Standard deviation A x Standard Deviation B x Standard Deviation C x Correlation)
Systematic Risk
Affects almost all assets in the economy at least to some extent
Unsystematic Risk
Affects only a small number of assets
Unexpected Return
Total return - Expected return
Beta coefficient
Measure of the relative systematic risk of an asset. Assets with betas larger (smaller) than 1 have more (less) systematic risk than average
Beta of 1 = average asset
Increased Beta, while it means greater systematic risk, should also normally indicate increased expected returns
Capital Asset Pricing Model
A theory of risk and return for securities in a competitive capital market. States that the expected return for an asset is dependent on 3 things:
- Pure time value of money (risk-free rate)
- Reward for bearing systematic risk (Market risk premium)
- Amount of systematic risk (asset Beta)
Security Market Line
Graphical representation of the linear relationship between systematic risk and expected return in financial markets.
Expected Return = Risk-Free Rate + (Market Risk Premium x Asset Beta)
Systematic Risk
Affects almost all assets in the economy at least to some extent (also called market risk)
Since it effects almost all assets, it can’t be diversified away
Covariance
A measure of the tendency of two things to move together
Calculated by taking the sum of the products of the deviations divided by n-1
Can be translated into correlation by dividing it by the product of the asset and market standard deviations
Market Risk Premium
The risk premium on a portfolio made up of everything in the market
Standard Deviation vs Beta as measurements of risk
While standard deviation is a measurement of total risk (high standard deviation = high total risk), Beta measures only systematic risk (Beta > 1 is high risk). So if there’s a difference in comparison, it must have something to do with unsystematic risk.
Ex: Stock A has a lower Beta than Stock B but also has a higher standard deviation. That would mean stock A has less systematic risk but more unsystematic risk.
Portfolio Beta Calculation
Sum of each individual (Asset weight x Asset Beta) in the portfolio
Reward to Risk Ratio (Definition and Equation)
The risk premium “per unit” of systematic risk
(New Expected Return - Old Expected Return)/Beta
You want a higher Reward to Risk Ratio
Must be the same for all assets in a competitive market
Beta and market sensitivity
Higher beta is more market sensitive, lower is less
Information Ratio
Alpha divided by tracking error.