summary
The aim of this study is to present selected statistical methods used in building a portfolio of shares of two companies, which is the basis for creating a multi-component portfolio. The article analyzes the rate of return of five selected listed companies over a period of six years to indicate a universal approach to investing using the fundamental portfolio theory - the Markowitz model. On the basis of analyzes of the rates of return on selected stocks in terms of profitability, risk and correlation, they were diversified and an investment portfolio was created, which was subjected to effectiveness assessment using three portfolio management quality measures. The obtained results indicate that quantitative measures ambiguously enable making the same investment decisions. However, they illustrate the market directions of investment, balancing the individual preferences of the investor.
