Does fundamental strength of the company influence its investment performance

The aim of our research is to find out whether the fundamental strength of the company affects its investment performance. The research is provided for 27 non-financial companies listed on the Warsaw Stock Exchange in the years 2012–2017. These companies belong to the stock indexes WIG20 and mWIG40 portfolios. The obtained results show that the proposed synthetic measure makes it possible to estimate the fundamental strength of listed companies, and the correlation between values of the constructed measure and rates of return is positive but usually statistically insignificant.