Which of the following is/are the results of a one-factor APT model? All of the answers are correct. O All well-diversified portfolios with the same beta must have the same expected return. O For portfolios with different betas, their risk premiums must be proportional to beta. O We can establish the expected return-beta relationship (the Security Market Line) that holds for all well-diversified portoflios and most individual securities.

Which of the following is/are the results of a one-factor APT model? All of the answers are correct. All well-diversified portfolios with the same beta must have the same expected return. For portfolios with different betas, their risk premiums must be proportional to beta. We can establish the expected return-beta relationship (the Security Market Line) that holds for all well-diversified portoflios and most individual securities