MPT Flashcards
4 MPT features
the way in which portfolios can be constructed to
maximise returns and minimise risks.
we cannot simply consider the potential risks and returns of an individual investment; relative to other
investors are risk averse and would choose a less risky investment if they were offered the choice of two with the same return.
a diversified portfolio of imperfectly correlated asset classes
can provide high returns with the least amount of volatility.
SD features 3
measures volatility
and therefore risk
can have same expected return but wider SD
SD rule of thumb
return can be expected to fall within one standard deviation of the average return roughly 68% of the time
and within two standard deviations roughly 95%
bell curve
4 ways to diversify
correlation
overseas
sector
asset class
Define EF 3
the relationship between the expected
return
and the risk of the portfolio as measured by the
standard deviation.
shows the best
return that can be expected for a given level of risk, or the lowest level of risk needed to
achieve a given expected return.
3 ef inputs
- return of each asset;
- standard deviation of each asset’s returns; and
- correlation between each pair of assets’ returns.
5 limitations of EF
- SD correct measure of risk and assumes assets have
normally distributed returns. - based solely on their attitude to
risk, as investors may be concerned about other factors - Inputs for risk and correlation between assets often rely on historical data - Correlations usually rise in a financial crisis, meaning that less risk will actually be
diversified away - The model does not include transaction costs when changing portfolio
- It assumes that the underlying portfolios in each asset class are index funds with the
same characteristics as the input data.