The aim of the research is evaluation of the efficiency of 19 selected open-end investment funds that have been operating at the Polish market. Analysis is based on daily data and covers the period from November, 2, 2006 to November, 2, 2008. Investigation is provided for the time series that contain observations from 3, 6, 12 and 24 months. The risk-free rate instruments are represented by
... [Show full abstract] selected treasury bonds and the market index is represented by the WIG (Warsaw Stock Exchange Index). In the research we apply Sharpe, Treynor and Jensen ratios as well as we investigate selectivity and market timing employing Treynor-Mazuy and Henriksson-Merton models.