1 Regulations of stockbroker's acting towards his clients Abstract The purpose of my thesis is to define and analyze a scope of regulation of securities broker's acting toward his clients. These rules are set up by European law and regulation, which was brought by three legal documents. First is Directive no. 2004/39/EC on markets in financial instrument, also called MiFID (Markets in Financial Instrument Directive). Second rule is implementing regulation of European Commission no. 1287/2006. Third rule is implementing directive of Commission no. 2006/73/EC. The first rule crates so called LEVEL 1 and the last two rules create LEVEL 2. Legal rules in Czech Republic are set up by reception of above mentioned European rules into the Czech act no. 256/2004 Sb. about business activities on capital markets and implementing publication no. 237/2008 Sb. These all legal documents bring wide range of regulations and inside of this regulation; the significant group is created by rules about protection of the clients, which are the subject of my analyses in the thesis. The thesis is composed of introduction chapter and seven specific chapters. In introduction are presented objectives and goals and structure of the thesis. In this chapter is defined the basic terminology and sources of the law. First chapter is focused..