{"id":51554,"date":"2026-07-28T20:51:06","date_gmt":"2026-07-28T20:51:06","guid":{"rendered":"https:\/\/www.vtmarkets.com\/fr-eu\/uncategorized\/la-debacle-du-kospi-met-en-evidence-sa-faible-correlation-avec-le-sp-500-alors-que-la-dispersion-et-la-volatilite-des-valeurs-composantes-bondissent\/"},"modified":"2026-07-28T20:51:06","modified_gmt":"2026-07-28T20:51:06","slug":"la-debacle-du-kospi-met-en-evidence-sa-faible-correlation-avec-le-sp-500-alors-que-la-dispersion-et-la-volatilite-des-valeurs-composantes-bondissent","status":"publish","type":"post","link":"https:\/\/www.vtmarkets.com\/fr-eu\/live-updates\/la-debacle-du-kospi-met-en-evidence-sa-faible-correlation-avec-le-sp-500-alors-que-la-dispersion-et-la-volatilite-des-valeurs-composantes-bondissent\/","title":{"rendered":"La d\u00e9b\u00e2cle du Kospi met en \u00e9vidence sa faible corr\u00e9lation avec le S&#038;P 500, alors que la dispersion et la volatilit\u00e9 des valeurs composantes bondissent"},"content":{"rendered":"<p>Le Kospi sud-cor\u00e9en a perdu plus de 10% pendant la nuit, avec SK Hynix en baisse de pr\u00e8s de 15% et Samsung Electronics en repli de 13%, alors m\u00eame que les contrats \u00e0 terme sur le Dow Jones Industrial Average progressaient d\u2019environ 1% et que ceux sur le S&amp;P 500 \u00e9taient globalement inchang\u00e9s. L\u2019article pr\u00e9sente cette divergence comme une histoire de corr\u00e9lation : la volatilit\u00e9 des indices est m\u00e9caniquement att\u00e9nu\u00e9e lorsque les mouvements des composantes ne se synchronisent pas. Mardi, le Cboe S&amp;P 500 Constituent Volatility Index (VIXEQ) \u00e9voluait l\u00e9g\u00e8rement au-dessus de 50 tandis que le Cboe 3-Month Implied Correlation Index (COR3M) se situait juste sous 9 ; avec la racine carr\u00e9e de 9% proche de 0,3, ce calcul est utilis\u00e9 pour expliquer un VIX autour de 19.<\/p>\n<h3>Mesures de volatilit\u00e9, de corr\u00e9lation et de dispersion<\/h3>\n<p>La formation des prix \u00e0 terme traduit une tension plut\u00f4t qu\u2019un apaisement. Le Cboe S&amp;P 500 Dispersion Index (DSPX) s\u2019\u00e9tablissait autour de 47, \u00e0 comparer \u00e0 une fourchette sur 52 semaines d\u2019environ 26-50, d\u00e9crit comme un plus haut de six ans et au-dessus de son pic d\u2019avril 2025, lorsque le VIX avait trait\u00e9 \u00e0 60. La dispersion r\u00e9alis\u00e9e est pr\u00e9sent\u00e9e comme concentr\u00e9e dans les technologies de l\u2019information, \u00e0 environ 3,85% contre \u00e0 peu pr\u00e8s 2,05% ailleurs. Parmi les autres indicateurs cit\u00e9s figurent un COR1M en hausse d\u2019environ 37% depuis pr\u00e8s de 6, un \u00e9cart VIXEQ-VIX proche de 34 points, et un Cboe SKEW autour de 147. Les mouvements de titres mentionn\u00e9s incluent SpaceX (SPCX) en baisse d\u2019environ 51% par rapport \u00e0 son plus haut post-cotation, Alphabet (GOOGL) en recul de 6%, Tesla (TSLA) en baisse de 13% et Nvidia (NVDA) en retrait de 5%, tandis que les b\u00e9n\u00e9fices du S&amp;P 500 au T2 indiquent une progression d\u2019environ 26% sur un an ; le prochain point d\u2019attention est la r\u00e9union du FOMC du 29 juillet, avec des probabilit\u00e9s de septembre int\u00e9gr\u00e9es par le march\u00e9 proches de 80%.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\"><b>Commencez \u00e0 trader d\u00e8s maintenant \u2014 cliquez <a href=\"https:\/\/www.vtmarkets.com\/fr-eu\/trade-now\/\">ici<\/a> pour cr\u00e9er votre compte r\u00e9el VT Markets.<\/b>\n\n<\/p>","protected":false},"excerpt":{"rendered":"<p>D\u00e9crochage choc du Kospi (-10%) malgr\u00e9 Wall Street stable : la volatilit\u00e9 s\u2019\u00e9teint quand la corr\u00e9lation baisse. Mais la dispersion explose (DSPX 47), surtout tech, SKEW 147, avant le FOMC.<\/p>\n","protected":false},"author":87,"featured_media":49719,"comment_status":"","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"_acf_changed":false,"footnotes":""},"categories":[24],"tags":[],"class_list":["post-51554","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-live-updates"],"acf":{"acf_article_selection_author":null},"aioseo_notices":[],"aioseo_head":"\n\t\t<!-- All in One SEO Pro 5.0.1.1 - aioseo.com -->\n\t<meta name=\"description\" content=\"D\u00e9crochage choc du Kospi (-10%) malgr\u00e9 Wall Street stable : la volatilit\u00e9 s\u2019\u00e9teint quand la corr\u00e9lation baisse. 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