Subject. The article discusses the index of the Russian stock market. Objectives. The purpose is to determine the influence of the tone and subject of news about sanctions on the dynamics of the Russian stock market index. Methods. The research methodology includes the use of text analysis to assess the tone of news about sanctions published in the media, identify thematic clusters within the news array, and build the GARCH model to determine the impact of news about sanctions on the dynamics of the Russian stock market index. Results. The study determined that the dynamics of the stock index is influenced only by news about sanctions that have a specific theme – news related to the impact of sanctions on the economy and the assessment of losses by experts, news about sanctions against the Russian financial system, and news about sanctions from countries other than the United States and the EU, while different topics have a multidirectional impact. The news, reflecting the expert assessment of the imposed sanctions and their impact on the economy, cause positive dynamics of the index. Conclusions. The changes taking place in the Russian stock market are caused not only by the introduction of sanctions restrictions, but also by news about restrictions broadcast in official information sources. Only negative and neutral news of a certain thematic focus turn out to be significant.
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