Which of the followings is correct?
the slope of the sml is determined by the value of beta. the capital market line is all linear combinations of the risk-free asset and the market portfolio. we will almost always find that the beta of a diversified portfolio is less stable over time than the beta of a single security. in portfolio analysis, we often use ex ante (future) returns and standard deviations, despite the fact that we are interested in ex post (historical) data.