This article reveals the role of modern institutionalism in the research of securities market. All the branches of institutionalism as well as their distinctive features are defined. Main differences between categories “institution”, “institute” and “organization” are explained as well as basic institutions and institutes of the market that govern the rules of the game. The four levels of institutional analysis are underlined, which gives a possibility to substantiate the expediency of use of the institutionalism methods in the securities market analysis.У статті розкрито роль, яку відіграє сучасний інституціоналізм в дослідженнях ринків цінних паперів. Розглянуто головні його течії та їх особливості. На основі опрацьованого широкого кола п...