{"id":53260,"date":"2026-08-28T08:26:28","date_gmt":"2026-08-28T08:26:28","guid":{"rendered":"https:\/\/www.vtmarkets.com\/fr-ca\/uncategorized\/la-flambee-de-nvidia-propulse-le-sp-500-pres-dun-record-mais-letroitesse-de-la-progression-et-la-chute-des-marches-europeens-accentuent-les-risques\/"},"modified":"2026-08-28T08:26:28","modified_gmt":"2026-08-28T08:26:28","slug":"la-flambee-de-nvidia-propulse-le-sp-500-pres-dun-record-mais-letroitesse-de-la-progression-et-la-chute-des-marches-europeens-accentuent-les-risques","status":"publish","type":"post","link":"https:\/\/www.vtmarkets.com\/fr-ca\/live-updates\/la-flambee-de-nvidia-propulse-le-sp-500-pres-dun-record-mais-letroitesse-de-la-progression-et-la-chute-des-marches-europeens-accentuent-les-risques\/","title":{"rendered":"La flamb\u00e9e de Nvidia propulse le S&#038;P 500 pr\u00e8s d\u2019un record, mais l\u2019\u00e9troitesse de la progression et la chute des march\u00e9s europ\u00e9ens accentuent les risques"},"content":{"rendered":"<p>Le bond de 8,74 % de Nvidia apr\u00e8s ses r\u00e9sultats a aliment\u00e9 un rebond des actions am\u00e9ricaines men\u00e9 par la technologie, faisant grimper le S&amp;P 500 de 0,72 % et le Nasdaq de 1,57 %. Le S&amp;P 500 a termin\u00e9 \u00e0 moins de 1 % de son sommet historique, tandis que le secteur des technologies de l\u2019information a progress\u00e9 de 3,40 %. Derri\u00e8re le mouvement phare, l\u2019ampleur du march\u00e9 (breadth) \u00e9tait faible : plus des deux tiers des membres du S&amp;P 500 ont recul\u00e9, et le S&amp;P 500 \u00e0 pond\u00e9ration \u00e9gale a c\u00e9d\u00e9 0,29 %, alors que tous les grands secteurs, sauf les TI, ont cl\u00f4tur\u00e9 en baisse.<\/p>\n<p>Les march\u00e9s europ\u00e9ens ont aussi recul\u00e9, la hausse des prix de l\u2019\u00e9nergie ravivant les craintes d\u2019inflation. Le STOXX 600 a perdu 0,69 %, sa pire s\u00e9ance en un mois, tandis que le CAC 40 a gliss\u00e9 de 1,68 % alors que les banques fran\u00e7aises ont sous-perform\u00e9 : BNP Paribas a chut\u00e9 de 4,79 %, Cr\u00e9dit Agricole de 3,97 % et Soci\u00e9t\u00e9 G\u00e9n\u00e9rale de 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 gagn\u00e9 0,75 % et le Hang Seng 0,47 %, de pair avec une hausse de 0,08 % du Shanghai Composite. Les contrats \u00e0 terme sur le S&amp;P 500 am\u00e9ricain \u00e9taient en baisse de 0,04 %.<\/p>\n<h3>Largeur du march\u00e9 et risques saisonniers<\/h3>\n<p>On observe un march\u00e9 qui para\u00eet en sant\u00e9 en surface, mais qui est extr\u00eamement fragile en dessous. M\u00eame si une forte pouss\u00e9e de quelques g\u00e9ants technologiques a fait monter le S&amp;P 500, plus de 66 % des titres de l\u2019indice ont en fait recul\u00e9 pendant ce rallye. Cette divergence extr\u00eame signifie qu\u2019il ne faut pas se fier aveugl\u00e9ment \u00e0 cette pouss\u00e9e.<\/p>\n<p>Historiquement, septembre est le pire mois pour le S&amp;P 500, avec un repli moyen d\u2019environ 1,2 % depuis 1928. Alors que le S&amp;P 500 \u00e0 pond\u00e9ration \u00e9gale baisse d\u00e9j\u00e0 de 0,29 % pendant que l\u2019indice principal monte, le march\u00e9 au sens large manque d\u2019appuis pour soutenir ces niveaux. Les op\u00e9rateurs de d\u00e9riv\u00e9s devraient se pr\u00e9parer \u00e0 cette faiblesse saisonni\u00e8re en misant sur la volatilit\u00e9.<\/p>\n<h3>Strat\u00e9gies d\u2019options pour un march\u00e9 fragile<\/h3>\n<p>Nous sugg\u00e9rons d\u2019acheter des options de vente (puts) de protection sur de grands FNB d\u2019indices comme SPY ou QQQ pendant que la volatilit\u00e9 implicite demeure relativement abordable. L\u2019indice de volatilit\u00e9 du CBOE (VIX) a historiquement tendance \u00e0 monter en septembre, lorsque les volumes reviennent apr\u00e8s le creux estival. L\u2019achat de puts pr\u00e8s du cours (near-the-money) arrivant \u00e0 \u00e9ch\u00e9ance \u00e0 la fin septembre aidera \u00e0 se couvrir contre une correction soudaine des m\u00e9ga-capitalisations technologiques.<\/p>\n<p>Une autre approche pertinente consiste \u00e0 exploiter la divergence entre la technologie et des secteurs mondiaux plus faibles, surtout avec les banques europ\u00e9ennes sous pression. On peut mettre en place des \u00e9carts baissiers avec puts (bear put spreads) sur des indices \u00e0 pond\u00e9ration \u00e9gale ou sur des secteurs plus faibles afin de capter un potentiel de baisse sans parier directement contre l\u2019\u00e9lan de la techno. Cela neutralise le risque tout en nous positionnant pour profiter d\u2019un retournement plus g\u00e9n\u00e9ralis\u00e9 du march\u00e9.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\"><b>Commencez \u00e0 n\u00e9gocier d\u00e8s maintenant \u2014 cliquez <a href=\"https:\/\/www.vtmarkets.com\/fr-ca\/trade-now\/\">ici<\/a> pour cr\u00e9er votre compte r\u00e9el VT Markets.<\/b>\n\n<\/p>","protected":false},"excerpt":{"rendered":"<p>Nvidia bondit de 8,74 % et propulse Wall Street, mais attention: la hausse est \u00e9troite. S&#038;P 500 pr\u00e8s d\u2019un record malgr\u00e9 un recul de 66 % des titres; l\u2019Europe flanche, \u00e9nergie et banques plombent.<\/p>\n","protected":false},"author":87,"featured_media":49664,"comment_status":"","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"_acf_changed":false,"footnotes":""},"categories":[24],"tags":[],"class_list":["post-53260","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 bondit de 8,74 % et propulse Wall Street, mais attention: la hausse est \u00e9troite. 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