Purpose - the aim of the article was an analysis of the returns of universal Polish equity investment funds before and after the change of portfolio managers. The article deals with the following research problem: how the replacement of investment fund managers impacts the results of Polish equity funds. Methodology - the research methodology which used the indexes of relative strength allows determining the abnormal returns of funds in relation to the WIG Index before and after the change of managers. Findings - the analyses showed negative abnormal returns before changing managers and ambiguous tendencies after the change of managers. Originality - this kind of study has not been conducted for the Polish capital market so far.