Resumen
This paper analyses the integration of financial market supervision at international level, particularly focusing on EU law and the actual processes taking place in this area considering Brexit as its part. Current legislative action at EU level has a significant impact on legislation in all member countries of European Union. This paper seeks, among other things, to find the causes of the increasingly ongoing process of integration of financial market supervision and determine whether or not the direction in which the international integration is going is the right one. The objective of this paper is to determine whether or not the process of integration increases the efficiency of financial market supervision itself and helps to develop the European single market, while simultaneously reducing systemic risk to financial market stability.