Abstract
<jats:p>The article studies the statistical dependencies of the RTS stock indices on the indicators of the four sectors of the global stock market and the indicator of emerging markets, as well as the statistical dependencies of the quotes of the 11 largest Russian companies on the dynamics of the indicators of the corresponding sectors of the global stock market. The article presents experimental calculations and identifies the main factors that influenced the dynamics of these dependencies during the periods of crisis in 2022–2024 (due to the sanctions war with Russia) and in January-August 2025, when the United States began to wage customs wars with exporting countries. It was shown that before the start of the special military operation, the RTS index was statistically significantly dependent on the indicators of the global oil and gas and resource sectors, with a slightly weaker dependence on the financial sector and the emerging markets index, and a dependence on the hightech sector. The US customs wars in 2022 have only affected the dependence of the RTS on the futures price of oil, which has become negative and almost statistically significant due to the stock prices of LUKOIL PJSC. As of August 2025, the RTS’s dependence on the performance of other sectors was completely insignificant.</jats:p>