Subject The study addresses the specifics of the information set of the modern financial market, which concern the work of traders with trading positions, the psychology of traders' perception of new information, based on which they build their trading strategies. Objectives The study aims to analyze the efficient market theory. Despite the controversy of some of its ideas, there are many works on the analysis of particular economic situations related to information support to the market functioning. Methods I applied general theoretical techniques to examine the information set of modern financial markets, using the analytical methodology to consider certain ideas of the efficient market theory. Results I have considered the fundamental postulates of the efficient market theory, which relate to information support. The article substantiates a critical viewpoint on the ways to measure the degree of market efficiency, proposed by Western authors. It also presents a trader classification by separate groups, depending on the information they use to make a deal. Under the efficient market theory, traders operate with three types of information, i.e. past, current and insider information. The article addresses the methods of analyzing the past information. It focuses on the possibility to manipulate current information, and analyzes the actions and motivation of traders working with different types of market information. Conclusions I underpin the conclusion on the need for special research of the information component of modern market trading processes, using certain tenets of the efficient market theory.
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