Investment portfolio management based on the study of the competitiveness of joint-stock companies

Investing into stock market effectively is possible only when based on scientifically sound methods for analysing investment instruments. The purpose of this study is to develop a method for selecting financial instruments for the formation of an investment portfolio of securities. The proposed method is based on the analysis of the competitiveness of joint-stock companies by identifying the market's capacity, the share price and the company's share in of the stock market turnover. Approbation of the developed method made it possible to identify investment-attractive shares quoted on the Warsaw Stock Exchange. The proposed method has potential to become a scientific basis for effective long-term investment on the stock market.