What is portfolio analysis?

The theoretical basis of portfolio analysis is as follows: the return of securities or portfolios is expressed by his expected rate of return, and the frontal line is measured by the variance of its expected yield. The return of securities yields a normal distribution. Rational investors have the two common characteristics of selecting the securities with the highest expected return rate under the conditions of the minimum risk of securities and risk under the established conditions of the expected rate of return.

The contents of portfolio analysis include Marco Weitz's mean variance model and capital asset pricing model (CAPM).