{"id":53274,"date":"2026-08-28T08:20:48","date_gmt":"2026-08-28T08:20:48","guid":{"rendered":"https:\/\/www.vtmarkets.com\/fr-eu\/uncategorized\/le-rally-de-nvidia-porte-le-sp-500-pres-dun-record-mais-la-faiblesse-de-la-participation-et-le-repli-de-leurope-accroissent-les-risques\/"},"modified":"2026-08-28T08:20:48","modified_gmt":"2026-08-28T08:20:48","slug":"le-rally-de-nvidia-porte-le-sp-500-pres-dun-record-mais-la-faiblesse-de-la-participation-et-le-repli-de-leurope-accroissent-les-risques","status":"publish","type":"post","link":"https:\/\/www.vtmarkets.com\/fr-eu\/live-updates\/le-rally-de-nvidia-porte-le-sp-500-pres-dun-record-mais-la-faiblesse-de-la-participation-et-le-repli-de-leurope-accroissent-les-risques\/","title":{"rendered":"Le rally de Nvidia porte le S&#038;P 500 pr\u00e8s d\u2019un record, mais la faiblesse de la participation et le repli de l\u2019Europe accroissent les risques"},"content":{"rendered":"<p>Le bond de 8,74 % de Nvidia apr\u00e8s la publication de ses r\u00e9sultats a aliment\u00e9 un rebond des actions am\u00e9ricaines tir\u00e9 par la technologie, propulsant 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 record historique, tandis que le secteur des technologies de l\u2019information a progress\u00e9 de 3,40 %. Mais derri\u00e8re les gros titres, la participation a \u00e9t\u00e9 faible : plus des deux tiers des composantes du S&amp;P 500 ont recul\u00e9, et le S&amp;P 500 \u00e0 pond\u00e9ration \u00e9gale 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, alors que la hausse des prix de l\u2019\u00e9nergie ravivait les craintes inflationnistes. Le STOXX 600 a perdu 0,69 %, sa pire s\u00e9ance en un mois, tandis que le CAC 40 a chut\u00e9 de 1,68 %, plomb\u00e9 par les banques fran\u00e7aises : BNP Paribas a d\u00e9croch\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 de 0,10 %, tandis que le Nikkei a gagn\u00e9 0,75 % et le Hang Seng 0,47 %, de concert avec une hausse de 0,08 % du Shanghai Composite. Les contrats \u00e0 terme sur le S&amp;P 500 am\u00e9ricain c\u00e9daient 0,04 %.<\/p>\n<h3>Largeur de march\u00e9 et risques saisonniers<\/h3>\n<p>Nous observons un march\u00e9 qui para\u00eet solide en surface, mais extr\u00eamement fragile en profondeur. Si un bond spectaculaire de quelques g\u00e9ants technologiques a suffi \u00e0 faire monter le S&amp;P 500, plus de 66 % des titres de l\u2019indice ont en r\u00e9alit\u00e9 recul\u00e9 pendant le rally. Cette divergence extr\u00eame implique qu\u2019il ne faut pas accorder une confiance aveugle \u00e0 cette hausse.<\/p>\n<p>Historiquement, septembre est le mois le plus d\u00e9favorable pour le S&amp;P 500, avec en moyenne un repli d\u2019environ 1,2 % depuis 1928. Alors que le S&amp;P 500 \u00e0 pond\u00e9ration \u00e9gale recule d\u00e9j\u00e0 de 0,29 % tandis que l\u2019indice principal progresse, le march\u00e9 au sens large manque de relais pour soutenir ces niveaux. Les intervenants sur d\u00e9riv\u00e9s devraient se pr\u00e9parer \u00e0 cette faiblesse saisonni\u00e8re en se positionnant sur 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, tels que SPY ou 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, \u00e0 mesure que les volumes reviennent apr\u00e8s le creux estival. L\u2019achat d\u2019options put \u00e0 proximit\u00e9 du prix d\u2019exercice (\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 consiste \u00e0 exploiter la divergence entre la technologie et des secteurs mondiaux plus faibles, alors que les banques europ\u00e9ennes restent sous pression. Il est possible de mettre en place des spreads baissiers sur puts (\u00ab bear put spreads \u00bb) sur des indices \u00e0 pond\u00e9ration \u00e9gale ou des secteurs plus fragiles, afin de capter un potentiel de baisse sans parier directement contre l\u2019\u00e9lan de la technologie. Cela neutralise une partie du risque tout en nous positionnant pour profiter d\u2019un retournement plus large du march\u00e9.<\/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>Wall Street rebondit gr\u00e2ce \u00e0 Nvidia, mais l\u2019ampleur du rally est trompeuse : 66 % du S&#038;P 500 baisse. Europe sous pression \u00e9nerg\u00e9tique et bancaire. Septembre risqu\u00e9 : privil\u00e9gier puts\/SPY-QQQ.<\/p>\n","protected":false},"author":87,"featured_media":49725,"comment_status":"","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"_acf_changed":false,"footnotes":""},"categories":[24],"tags":[],"class_list":["post-53274","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=\"Wall Street rebondit gr\u00e2ce \u00e0 Nvidia, mais l\u2019ampleur du rally est trompeuse : 66 % du S&amp;P 500 baisse. Europe sous pression \u00e9nerg\u00e9tique et bancaire. 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