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<article article-type="research-article" dtd-version="1.3" xmlns:mml="http://www.w3.org/1998/Math/MathML" xmlns:xlink="http://www.w3.org/1999/xlink" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xml:lang="ru"><front><journal-meta><journal-id journal-id-type="publisher-id">guuvest</journal-id><journal-title-group><journal-title xml:lang="ru">Вестник университета</journal-title><trans-title-group xml:lang="en"><trans-title>Vestnik Universiteta</trans-title></trans-title-group></journal-title-group><issn pub-type="ppub">1816-4277</issn><issn pub-type="epub">2686-8415</issn><publisher><publisher-name>State University of Management</publisher-name></publisher></journal-meta><article-meta><article-id pub-id-type="doi">10.26425/1816-4277-2022-12-154-161</article-id><article-id custom-type="elpub" pub-id-type="custom">guuvest-4121</article-id><article-categories><subj-group subj-group-type="heading"><subject>Research Article</subject></subj-group><subj-group subj-group-type="section-heading" xml:lang="ru"><subject>ФИНАНСЫ И БАНКОВСКОЕ ДЕЛО</subject></subj-group><subj-group subj-group-type="section-heading" xml:lang="en"><subject>FINANCE AND BANKING</subject></subj-group></article-categories><title-group><article-title>Адаптация инструментов оценки портфельного риска с учетом волатильности</article-title><trans-title-group xml:lang="en"><trans-title>Volatility-based adjustments to portfolio risk assessment tools</trans-title></trans-title-group></title-group><contrib-group><contrib contrib-type="author" corresp="yes"><contrib-id contrib-id-type="orcid">https://orcid.org/0000-0003-1540-0827</contrib-id><name-alternatives><name name-style="eastern" xml:lang="ru"><surname>Коржнев</surname><given-names>С. В.</given-names></name><name name-style="western" xml:lang="en"><surname>Korzhnev</surname><given-names>S. V.</given-names></name></name-alternatives><bio xml:lang="ru"><p>Коржнев Станислав Владимирович - Канд. экон. наук, ассист. каф. математических методов в экономике и управлении;  ассист. деп. анализа данных и машинного обучения</p><p>г. Москва</p></bio><bio xml:lang="en"><p>Stanislav V. Korzhnev - Cand. Sci. (Econ.), Assistant at the Department of Mathematical Methods in Economics and Management; Assistant at the Department of Data Analysis and Machine Learning</p><p>Moscow</p></bio><email xlink:type="simple">sv_korzhnev@guu.ru</email><xref ref-type="aff" rid="aff-1"/></contrib></contrib-group><aff-alternatives id="aff-1"><aff xml:lang="ru"><institution>Государственный университет управления; Финансовый университет при Правительстве РФ</institution><country>Россия</country></aff><aff xml:lang="en"><institution>State University of Management; Financial University under the Government of the Russian Federation</institution><country>Russian Federation</country></aff></aff-alternatives><pub-date pub-type="collection"><year>2022</year></pub-date><pub-date pub-type="epub"><day>16</day><month>02</month><year>2023</year></pub-date><volume>1</volume><issue>12</issue><fpage>154</fpage><lpage>161</lpage><permissions><copyright-statement>Copyright &amp;#x00A9; Коржнев С.В., 2023</copyright-statement><copyright-year>2023</copyright-year><copyright-holder xml:lang="ru">Коржнев С.В.</copyright-holder><copyright-holder xml:lang="en">Korzhnev S.V.</copyright-holder><license xml:lang="ru" license-type="creative-commons-attribution" xlink:href="https://creativecommons.org/licenses/by/4.0/" xlink:type="simple"><license-p>Данная работа распространяется под лицензией Creative Commons Attribution 4.0.</license-p></license><license xml:lang="en" license-type="creative-commons-attribution" xlink:href="https://creativecommons.org/licenses/by/4.0/" xlink:type="simple"><license-p>This work is licensed under a Creative Commons Attribution 4.0 License.</license-p></license></permissions><self-uri xlink:href="https://vestnik.guu.ru/jour/article/view/4121">https://vestnik.guu.ru/jour/article/view/4121</self-uri><abstract><p>Статья посвящена анализу корреляции активов на российском фондовом рынке. Цель исследования – выяснить, являются ли соответствующие коэффициенты корреляции постоянными. Результаты теста Дженнриха и проведенного корреляционного анализа свидетельствуют о том, что при разных уровнях волатильности коэффициенты корреляции существенно различаются: при высокой волатильности они в несколько раз больше, чем при низкой. Для оценки рисков представляет особую важность корреляция в условиях повышенной волатильности, поскольку подобная волатильность сопровождает негативные движения рынка. Использование обычных коэффициентов корреляции приводит к переоценке влияния диверсификации на снижение волатильности портфеля, содержащего акции российского фондового рынка, и, соответственно, к недооценке рисков портфеля. Более корректно риски можно оценить, применяя коэффициенты корреляции, соответствующие условиям высокой волатильности.</p></abstract><trans-abstract xml:lang="en"><p>The article is devoted to the analysis of correlation between assets in the Russian stock market. The purpose of the study is to assess the stability of correlation coefficients. The results of the Jennrich test and correlation analysis carried out indicate that correlation coefficients differ significantly for different volatility levels, that is, the coefficients in times of high volatility are significantly higher than those in times of low volatility. Correlations during periods of heightened volatility are key for assessing risks, since it is such volatility that characterizes negative market movements. The use of conventional correlation coefficients leads to an overestimation of the role of diversification in reducing the volatility in a portfolio of Russian assets and thus an underestimation of the investment portfolio risks. Risks can be assessed more accurately if correlation coefficients corresponding to periods of high volatility are used.</p></trans-abstract><kwd-group xml:lang="ru"><kwd>Российский фондовый рынок</kwd><kwd>диверсификация</kwd><kwd>корреляция</kwd><kwd>оценка рисков</kwd><kwd>тест Дженнриха</kwd></kwd-group><kwd-group xml:lang="en"><kwd>Russian stock market</kwd><kwd>diversification</kwd><kwd>correlation</kwd><kwd>risk assessment</kwd><kwd>Jennrich test</kwd></kwd-group></article-meta></front><back><ref-list><title>References</title><ref id="cit1"><label>1</label><citation-alternatives><mixed-citation xml:lang="ru">Markowitz H. Portfolio selection. The journal of finance. 1952;7(1):77–91. https://doi.org/10.2307/2975974</mixed-citation><mixed-citation xml:lang="en">Markowitz H. Portfolio selection. 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