The diploma thesis deals with the current issues, the general description of the Over-the-counter market and the classification of derivative contracts. In the next chapters, the diploma focuses on the general description of the Markets in Financial Instruments Directive and the Markets in Financial Instruments Directive II and the analysis of the OTC market from the global perspective. The last part examines the impact and response of the OTC derivatives market according to the risk classes and the type of derivative contracts in the European Union after the implementation of the second of the above-mentioned directives. The aim of the thesis is to analyse the development of business activity and to determine the liquidity on the European ...