{"id":52728,"date":"2026-08-28T07:36:25","date_gmt":"2026-08-28T07:36:25","guid":{"rendered":"https:\/\/www.vtmarkets.com\/fr-latam\/uncategorized\/le-rally-de-nvidia-propulse-le-sp-500-pres-dun-record-mais-letroitesse-de-la-hausse-et-la-baisse-en-europe-accroissent-les-risques\/"},"modified":"2026-08-28T07:36:25","modified_gmt":"2026-08-28T07:36:25","slug":"le-rally-de-nvidia-propulse-le-sp-500-pres-dun-record-mais-letroitesse-de-la-hausse-et-la-baisse-en-europe-accroissent-les-risques","status":"publish","type":"post","link":"https:\/\/www.vtmarkets.com\/fr-latam\/live-updates\/le-rally-de-nvidia-propulse-le-sp-500-pres-dun-record-mais-letroitesse-de-la-hausse-et-la-baisse-en-europe-accroissent-les-risques\/","title":{"rendered":"Le rally de Nvidia propulse le S&#038;P 500 pr\u00e8s d\u2019un record, mais l\u2019\u00e9troitesse de la hausse et la baisse en Europe accroissent les risques"},"content":{"rendered":"<p>Le bond post-r\u00e9sultats de Nvidia de 8,74 % a aliment\u00e9 un rebond des actions am\u00e9ricaines tir\u00e9 par la technologie, portant le S&#038;P 500 \u00e0 +0,72 % et le Nasdaq \u00e0 +1,57 %. Le S&#038;P 500 a termin\u00e9 \u00e0 moins de 1 % de son record historique, tandis que le secteur des technologies de l\u2019information gagnait 3,40 %. Derri\u00e8re la hausse en trompe-l\u2019\u0153il, la participation a \u00e9t\u00e9 faible : plus des deux tiers des composantes du S&#038;P 500 ont recul\u00e9, et le S&#038;P 500 \u00e9quipond\u00e9r\u00e9 a c\u00e9d\u00e9 0,29 %, tous les grands secteurs hors technologies de l\u2019information ayant cl\u00f4tur\u00e9 dans le rouge.<\/p>\n<p>Les march\u00e9s europ\u00e9ens ont \u00e9galement recul\u00e9, la hausse des prix de l\u2019\u00e9nergie ravivant les craintes inflationnistes. Le STOXX 600 a perdu 0,69 %, sa pire s\u00e9ance depuis un mois, tandis que le CAC 40 a l\u00e2ch\u00e9 1,68 % dans le sillage des banques fran\u00e7aises, \u00e0 la tra\u00eene : BNP Paribas -4,79 %, Cr\u00e9dit Agricole -3,97 % et Soci\u00e9t\u00e9 G\u00e9n\u00e9rale -4,99 %. En Asie, le KOSPI a recul\u00e9 de 1,24 % et le CSI 300 a c\u00e9d\u00e9 0,10 %, tandis que le Nikkei a progress\u00e9 de 0,75 % et le Hang Seng de 0,47 %, de concert avec une hausse de 0,08 % du Shanghai Composite. Les contrats \u00e0 terme sur le S&#038;P 500 am\u00e9ricain reculaient de 0,04 %.<\/p>\n<h3>Largeur de march\u00e9 et risques saisonniers<\/h3>\n<p>Nous observons un march\u00e9 qui para\u00eet sain en surface, mais extr\u00eamement fragile en profondeur. Alors qu\u2019un bond massif de quelques g\u00e9ants technologiques a tir\u00e9 le S&#038;P 500 \u00e0 la hausse, plus de 66 % des actions de l\u2019indice ont en r\u00e9alit\u00e9 baiss\u00e9 pendant le rally. Cette divergence extr\u00eame signifie qu\u2019il ne faut pas accorder une confiance aveugle \u00e0 ce sursaut.<\/p>\n<p>Historiquement, septembre est le mois le plus d\u00e9favorable pour le S&#038;P 500, avec une baisse moyenne d\u2019environ 1,2 % depuis 1928. Alors que le S&#038;P 500 \u00e9quipond\u00e9r\u00e9 reculait d\u00e9j\u00e0 de 0,29 % quand l\u2019indice principal montait, le march\u00e9 au sens large manque d\u2019appuis pour maintenir ces niveaux. Les intervenants sur produits d\u00e9riv\u00e9s devraient se pr\u00e9parer \u00e0 cette faiblesse saisonni\u00e8re en ciblant la volatilit\u00e9.<\/p>\n<h3>Strat\u00e9gies options pour un march\u00e9 fragile<\/h3>\n<p>Nous recommandons d\u2019acheter des puts de protection sur les principaux ETF indiciels comme le SPY ou le QQQ tant que la volatilit\u00e9 implicite demeure relativement bon march\u00e9. L\u2019indice de volatilit\u00e9 du CBOE (VIX) a historiquement tendance \u00e0 remonter en septembre, lorsque les volumes reviennent apr\u00e8s l\u2019accalmie estivale. L\u2019achat de puts proches du cours (\u00ab near the money \u00bb) arrivant \u00e0 \u00e9ch\u00e9ance fin septembre permettra de se couvrir contre une correction soudaine des valeurs technologiques \u00e0 tr\u00e8s forte capitalisation.<\/p>\n<p>Une autre approche pertinente consiste \u00e0 exploiter la divergence entre la technologie et des secteurs mondiaux plus faibles, en particulier alors que les banques europ\u00e9ennes restent sous pression. Nous pouvons mettre en place des bear put spreads sur des indices \u00e9quipond\u00e9r\u00e9s ou des secteurs plus fragiles afin de capter un potentiel de baisse sans parier directement contre la dynamique de la tech. Cela neutralise une partie du risque tout en nous positionnant pour profiter d\u2019un retournement plus large du march\u00e9.<\/p>\n\n\n\r\n<p class=\"wp-block-paragraph\"><b>Commencez \u00e0 trader d\u00e8s maintenant \u2014 cliquez <a href=\"https:\/\/www.vtmarkets.com\/fr-latam\/trade-now\/\">ici<\/a> pour cr\u00e9er votre compte r\u00e9el VT Markets.<\/b>\n\r\n<\/p>","protected":false},"excerpt":{"rendered":"<p>Nvidia propulse Wall Street, mais l\u2019euphorie masque une faiblesse: deux tiers du S&#038;P 500 reculent et l\u2019\u00e9quipond\u00e9r\u00e9 baisse. Europe en repli, \u00e9nergie et banques plombent. Septembre, mois \u00e0 risque: privil\u00e9gier puts.<\/p>\n","protected":false},"author":87,"featured_media":49273,"comment_status":"","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"_acf_changed":false,"footnotes":""},"categories":[10],"tags":[],"class_list":["post-52728","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=\"Nvidia propulse Wall Street, mais l\u2019euphorie masque une faiblesse: deux tiers du S&amp;P 500 reculent et l\u2019\u00e9quipond\u00e9r\u00e9 baisse. Europe en repli, \u00e9nergie et banques plombent. 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