{"id":69664,"date":"2026-10-13T04:38:38","date_gmt":"2026-10-13T04:38:38","guid":{"rendered":"https:\/\/www.vtmarkets.com\/fr-latam\/uncategorized\/sp-500-bull-market-nears-year-five-as-ai-led-rally-tests-breadth-and-valuations\/"},"modified":"2026-10-13T04:38:38","modified_gmt":"2026-10-13T04:38:38","slug":"sp-500-bull-market-nears-year-five-as-ai-led-rally-tests-breadth-and-valuations","status":"publish","type":"post","link":"https:\/\/www.vtmarkets.com\/fr-latam\/live-updates\/sp-500-bull-market-nears-year-five-as-ai-led-rally-tests-breadth-and-valuations\/","title":{"rendered":"Le march\u00e9 haussier du S&#038;P 500 approche de sa cinqui\u00e8me ann\u00e9e, tandis que le rallye men\u00e9 par l\u2019IA met \u00e0 l\u2019\u00e9preuve l\u2019ampleur de la hausse et les valorisations"},"content":{"rendered":"<p>Quatre ans apr\u00e8s le d\u00e9but de sa progression, le S&#038;P 500 a gagn\u00e9 117%, ce qui en fait le troisi\u00e8me march\u00e9 haussier le plus long et le troisi\u00e8me plus important depuis 1947. Selon les donn\u00e9es de CFRA, si la tendance haussi\u00e8re se prolonge sur une cinqui\u00e8me ann\u00e9e, le gain moyen de l\u2019indice atteint 21%, ce qui ouvre la perspective d\u2019un \u00e9largissement du rallye au-del\u00e0 des grandes valeurs technologiques. Le cycle actuel a d\u00e9jou\u00e9 le sch\u00e9ma habituel, dans lequel les march\u00e9s haussiers d\u00e9marrent lorsque la Fed assouplit sa politique et que la liquidit\u00e9 se r\u00e9oriente vers les actifs risqu\u00e9s.<\/p>\n\n<p>En 2022, la R\u00e9serve f\u00e9d\u00e9rale a enclench\u00e9 son cycle de hausse des taux le plus agressif depuis 40 ans, et pourtant le S&#038;P 500 s\u2019est redress\u00e9, port\u00e9 par le boom de l\u2019IA, qui a ajout\u00e9 40.000 milliards de dollars \u00e0 la capitalisation boursi\u00e8re. Nvidia a bondi de 1.900% et sa valorisation approche 6.000 milliards de dollars, tandis qu\u2019une \u00e9tude de la Brookings Institution estime que les groupes technologiques devraient d\u00e9gager 3.500 milliards de dollars de profits d\u2019ici 2027 pour justifier les d\u00e9penses li\u00e9es \u00e0 l\u2019IA. La largeur de march\u00e9 reste faible : l\u2019\u00e9cart de performance entre l\u2019indice classique et ses versions \u00e9quipond\u00e9r\u00e9es a d\u00e9pass\u00e9 50 points de pourcentage, seul un tiers des actions \u00e9voluent au-dessus de leur moyenne mobile \u00e0 50 jours contre 70% \u00e0 la mi-ao\u00fbt, et environ la moiti\u00e9 des composantes du Russell 2000 reculent d\u2019au moins 20% par rapport \u00e0 leurs plus hauts sur 52 semaines.<\/p>\n\n<h3>\u00c9quilibrer le potentiel du march\u00e9 haussier et les risques de concentration<\/h3>\n\n<p>Aborder ce cap des quatre ans du march\u00e9 haussier impose de trouver un \u00e9quilibre entre le potentiel de hausse et des risques de concentration \u00e9lev\u00e9s. Depuis 1947, les donn\u00e9es historiques de CFRA montrent que lorsqu\u2019un march\u00e9 haussier atteint une cinqui\u00e8me ann\u00e9e, le S&#038;P 500 affiche un gain moyen de 21%. Il est possible de capter une \u00e9ventuelle extension au-del\u00e0 des mega caps technologiques en recourant \u00e0 des options d\u2019achat (calls) sur des secteurs cycliques plus larges, rest\u00e9s en retrait par rapport \u00e0 l\u2019indice principal.<\/p>\n\n<p>Cependant, la largeur de march\u00e9 se d\u00e9grade rapidement, avec seulement un tiers des composantes de l\u2019indice actuellement au-dessus de leur moyenne mobile \u00e0 50 jours, contre 70% plus t\u00f4t cet \u00e9t\u00e9. L\u2019\u00e9cart de performance entre les indices pond\u00e9r\u00e9s par la capitalisation et les indices \u00e9quipond\u00e9r\u00e9s s\u2019est \u00e9largi au-del\u00e0 de 50 points de pourcentage, cr\u00e9ant une d\u00e9pendance dangereuse \u00e0 une poign\u00e9e de g\u00e9ants technologiques. Pour prot\u00e9ger les portefeuilles contre un d\u00e9bouclage brutal de positions surpeupl\u00e9es sur les mega caps, il convient d\u2019envisager l\u2019achat d\u2019options de vente (puts) de protection ou la mise en place de \u00ab collars \u00bb \u00e0 co\u00fbt nul sur une exposition large \u00e0 un indice technologique.<\/p>\n\n<h3>Valorisations de l\u2019IA, volatilit\u00e9 des b\u00e9n\u00e9fices et vuln\u00e9rabilit\u00e9s des petites capitalisations<\/h3>\n\n<p>Le r\u00e9cit de l\u2019intelligence artificielle s\u2019expose aussi \u00e0 une mise \u00e0 l\u2019\u00e9preuve s\u00e9v\u00e8re \u00e0 l\u2019approche des prochaines saisons de r\u00e9sultats. Les recherches indiquent que les entreprises technologiques doivent g\u00e9n\u00e9rer des milliers de milliards de dollars de profits dans les prochaines ann\u00e9es pour justifier leurs valorisations actuelles, ce qui laisse penser que la volatilit\u00e9 implicite des options est exceptionnellement sous-\u00e9valu\u00e9e. Il est possible de se positionner sur des surprises de r\u00e9sultats de type \u00ab tout ou rien \u00bb sur des valeurs de semi-conducteurs en forte hausse en utilisant des strat\u00e9gies de strangle acheteur, afin de profiter de mouvements marqu\u00e9s dans un sens comme dans l\u2019autre.<\/p>\n\n<p>Dans le m\u00eame temps, les pressions de politique mon\u00e9taire continuent de peser lourdement sur les petites entreprises d\u00e9pendantes de la dette. Alors que la moiti\u00e9 des composantes des indices de petites capitalisations \u00e9voluent 20% ou plus sous leurs plus hauts sur 52 semaines, les petites entreprises demeurent particuli\u00e8rement vuln\u00e9rables \u00e0 la persistance de taux \u00e9lev\u00e9s. Les op\u00e9rateurs sur produits d\u00e9riv\u00e9s peuvent envisager de vendre des contrats \u00e0 terme sur indices de petites capitalisations ou d\u2019acheter des options de vente sur des r\u00e9f\u00e9rences small caps comme couverture macro face au durcissement des conditions de cr\u00e9dit dans les semaines \u00e0 venir.<\/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>Et si le bull market n\u2019\u00e9tait pas fini ? Apr\u00e8s +117% en quatre ans, le S&#038;P 500 vise une 5e ann\u00e9e (moyenne +21%), mais l\u2019IA et quelques mega caps concentrent les risques.<\/p>\n","protected":false},"author":87,"featured_media":69663,"comment_status":"","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"_acf_changed":false,"footnotes":""},"categories":[10],"tags":[],"class_list":["post-69664","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=\"Et si le bull market n\u2019\u00e9tait pas fini ? 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