CHAPTER 11 Flashcards
A portfolio weight is the fraction of the total investment in the portfolio held in
an individual investment in the portfolio.
YES
The expected return of a portfolio is simply the weighted average of the expected
returns of the investments within the portfolio.
YES
Portfolio weights add up to 1 so that they represent the way we have divided
our money between the different individual investments in the portfolio.
YES
Without trading, the portfolio weights will decrease for the stocks in the
portfolio whose returns are above the overall portfolio return.
NO
Without trading, the portfolio weights will increase for the stocks in
the portfolio whose returns are above the overall portfolio return.
YES
Correlation is the expected product of the deviations of two returns.
NO
Because the prices of the stocks do not move identically, some of the risk is averaged out in a portfolio.
YES
The covariance and correlation allow us to measure the co-movement of returns.
YES
The amount of risk that is eliminated in a portfolio depends on the degree to
which the stocks face common risks and their prices move together.
YES
If two stocks move together, their returns will tend to be above or below average
at the same time, and the covariance will be positive.
YES
Dividing the covariance by the volatilities ensures that correlation is always
between -1 and +1.
YES
The closer the correlation is to 0, the more the returns tend to move together as a
result of common risk.
NO
Volatility is the square root of variance.
YES
The closer the correlation is to 1, the more the returns tend to move
together as a result of common risk.
YES
When the covariance equals 0, the stocks have no tendency to move either
together or in opposition of one another.
YES
The closer the correlation is to -1, the more the returns tend to move in opposite
directions.
YES
The variance of a portfolio depends only on the variance of the individual stocks.
NO
The variance of a portfolio depends on the variance and correlations
of the individual stocks.
YES
A stock’s return is perfectly positively correlated with itself.
YES
The volatility declines as the number of stocks in a portfolio grows.
YES
The variance of a portfolio is equal to the weighted average covariances of each stock within the portfolio.
YES
The variance of a portfolio is equal to the sum of the covariances of the returns of all pairs of stocks in the portfolio multiplied by each of their portfolio weights.
YES
The variance of a portfolio is equal to the weighted average correlation of each
stock within the portfolio.
NO
Nearly half of the volatility of individual stocks can be eliminated in a large
portfolio as a result of diversification.
YES