chapter 11 Flashcards
(33 cards)
portfolio
collection of assets
an asset’s risk and return impact
how the stock affects the risk and return of the portfolio
the risk-return trade-off is measured by
the portfolio expected return and standard deviation
the expected return of a portfolio is
the weighted average of the expected returns for each asset in the portfolio
weights
percent of portfolio invested in each asset
portfolio standard deviation is NOT
a weighted average of the standard deviation of the component securities’ risk
if the correlation between the returns on stocks is less than 1
portfolio standard deviation will be less than the weighted average of the standard deviation of the component securities’ risk
systematic risk
factors that affect a large number of assets
- aka market/non-diversifiable risk
systematic risk examples
changes in GDP, inflation, interest rates
unsystematic risk
affect a limited number of assets, can be eliminated by combining assets into porfolios
- aka diversifiable/unique/asset-specific risk
unsystematic risk examples
labor strikes, part shortages
diversification can
- substantially reduce risk without an equivalent reduction in expected returns
- reduce variability of returns
diversification is caused by
the offset of worse-than-expected returns from one asset by better-than-expected returns from another
systematic portion
minimum level of risk than cannot be diversified away
total risk =
systematic risk + unsystematic risk
the standard deviation of returns is a measure of
total risk
for well-diversified portfolios, unsystematic risk is
very small
total risk for diversified portfolio is essentially equal to
systematic risk
there is no reward for
bearing risk unnecessarily
systematic risk principle
the expected return on a risky asset depends only on that asset’s systematic risk
the market risk for individual securities is relevant for
stocks held in well-diversified portfolios
market risk for individual securities is measured by
a stock’s beta coefficient, B
beta is a measure of the
systematic risk of the stock
if B = 1.0
stock has average risk