Investor behavior in the stock market amid sanctions news

The article examines one of the problems of behavioral finance: the influence of news on investor behavior. Based on theoretical analysis, the factors influencing the value of the company's shares were systematized, which made it possible to identify such parameters as the quality and extent of news dissemination, the market reaction to the news and national financial news as an assessment of the market development trend. As part of the empirical study, an analysis was carried out of the impact of macroeconomic news for 2020-2022 on the Russian stock market and the reasons for the formation of a certain market reaction. It is noted that in the Russian stock market there are cognitive distortions of investors in the form of an overreaction, which has an impact on the public policy of corporations and market regulation.