Problem 6.19 emmy is analyzing a two-stock portfolio that consists of a utility stock and a commodity stock. she knows that the return on the utility stock has a standard deviation of 40 percent and the return on the commodity stock has a standard deviation of 30 percent. however, she does not know the exact covariance in the returns of the two stocks. emmy would like to plot the variance of the portfolio for each of three cases—covariance of 0.095, 0, and –0.095 — in order to understand how the variance of such a portfolio would react. do the calculation for all three cases (0.095, 0, and -0.095), assuming an equal proportion of each stock in the portfolio

According to this excerpt, a key part of our national security strategy is

Which represents a surplus in the market? a market price equals equilibrium price. b quantity supplied is greater than quantity demanded. c market price is less than equilibrium price. d quantity supplied equals quantity demanded.

Which of the following is likely not a benefit of requiring a grand jury to listen to and examine all of the evidence against a person suspected of committing a serious crime and then independently deciding whether or not to hand down an indictment? 1.the grand jury system provides the accused another safeguard against being sent to trial and facing conviction based on flawed evidence. 2.the members of the grand jury are drawn from the community and are empowered to render independent decisions about whether or not the government has collected enough evidence to bring an individual to trial. 3.the grand jury’s decision can provide prosecutors insight into what is necessary to build a sufficient case if a similar crime is presented later. 4.the grand jury is impaneled to rubber-stamp prosecutors’ cases, which makes it possible for more cases to reach trial.