Capital Asset Pricing Model Flashcards
What are the assumptions of the Capital Asset Pricing Model?
1) Many small investors that are price takers
2) Identical holding period
3) Only tradable securities (stocks, bonds and risk-free)
4) No taxes or transaction costs
5) All investors are rational, so they can choose efficient portfolios
6) Homogeneous expectations and beliefs (same information set)
True or false: in the CAPM the securities are tradable (stocks, bonds and risk free)
True
What does the Security Market Line tell us?
Given an efficient portfolio, the SML gives us the equilibrium expected return of any securite/portfolio.
What is the market risk premium?
E(rm) - rf
What is the risk premium for a security?
β * (E(rm) - rf)
What is the risk premium on any security/portfolio equal to?
The risk premium on any security/portfolio is equal to its exposure to market (systematic) risk (β) times the market risk premium.
What is the expected excess return on any security/portfolio equal to?
The risk premium on any security/portfolio is equal to its exposure to market (systematic) risk (β) times the market risk premium.
What is the expected excess return?
The risk premium.
What does β measure?
β measures the relationship between what you’re adding and the market. It captures the systematic risk.
What is the β for the market?
1
What does it mean when β<1?
The portfolio has less systematic risk than the market portfolio.
When should markets provide you with a premium?
If it has idiosyncratic risk, markets shouldn’t compensate you for risk you can eliminate.
What does the risk premium of a security/portfolio depend on?
How it is impacted by systematic risk (can’t be eliminated).
How can we separate the total risk of a given stock?
We need to use a portfolio that only contains systematic risk, which is the market portfolio.
True or false: the market portfolio exists in real life.
False
What do we use to get a proxy for the market portfolio?
Large indexes of stocks, such as S&P 500 or Nasdaq.
What does it mean when βi > 1?
The equilibrium expected return is higher than the expected return of the market, which means the portfolio is high risk.
What does it mean when βi = 1?
The equilibrium expected return is the expected return of the market portfolio, which means it’s the market portfolio.