EN
The article is an attempt to prove that the threat posed by Stock Exchange crimes in Poland is serious and it is perceived as such by investors. The crimes are serious market weakness as long as they have impact on investors despite the increasing number of persecuted crimes or the growing trust in the Stock Market controlling supenvisors' competence. The greatest number of crimes is related to the illegal sales offers. The next most popular crimes are market manipulations and insiders trading. The Iow percentage of cases results in conviction; financial penalties are Iow and imprisonment terms are short. The source of hope are fundamental 2006 regulations changing supervision competences that may lead to the increased crime detection and to the more effective sanctions