{"id":52534,"date":"2026-08-12T01:27:10","date_gmt":"2026-08-12T01:27:10","guid":{"rendered":"https:\/\/www.vtmarkets.com\/fr-eu\/uncategorized\/september-monthly-insights\/"},"modified":"2026-08-12T01:27:10","modified_gmt":"2026-08-12T01:27:10","slug":"september-monthly-insights","status":"publish","type":"post","link":"https:\/\/www.vtmarkets.com\/fr-eu\/monthly-market-insights\/september-monthly-insights\/","title":{"rendered":"Revue mensuelle de septembre"},"content":{"rendered":"\n<figure class=\"wp-block-image size-large\"><img decoding=\"async\" src=\"https:\/\/www.vtmarkets.com\/wp-content\/uploads\/2025\/06\/ross_maxwell_banner_mobile-1024x559.png\" alt=\"\" class=\"wp-image-25586\" \/><\/figure>\n\n\n<p>Les march\u00e9s mondiaux entrent dans une phase cl\u00e9. Les banques centrales doivent arbitrer entre deux risques: l\u2019inflation (hausse durable des prix) et la stagflation (inflation \u00e9lev\u00e9e avec croissance faible). Cette incertitude, ajout\u00e9e aux tensions g\u00e9opolitiques, renforce la volatilit\u00e9 (variations rapides des prix) sur l\u2019ensemble des classes d\u2019actifs (actions, obligations, devises, mati\u00e8res premi\u00e8res, cryptoactifs).<\/p>\n\n<p>Aux \u00c9tats-Unis, la R\u00e9serve f\u00e9d\u00e9rale (Fed, banque centrale am\u00e9ricaine) constate un ralentissement de l\u2019inflation, tandis que plusieurs indicateurs de croissance signalent un risque de r\u00e9cession (baisse de l\u2019activit\u00e9). La Fed subit aussi des pressions politiques pour baisser ses taux directeurs (taux d\u2019int\u00e9r\u00eat qui guident le co\u00fbt du cr\u00e9dit dans l\u2019\u00e9conomie), notamment de la part de l\u2019administration Trump.<\/p>\n\n<p>Si la baisse des taux s\u2019amplifie, le dollar (USD) pourrait se replier. Cela augmenterait la volatilit\u00e9 sur le march\u00e9 des changes (forex, march\u00e9 des devises), avec un potentiel de hausse sur des paires comme GBPUSD (livre\/dollar), EURUSD (euro\/dollar) et AUDUSD (dollar australien\/dollar). Apr\u00e8s la derni\u00e8re r\u00e9union de la Fed, Jerome Powell a toutefois adopt\u00e9 un ton prudent, ce qui r\u00e9duit la visibilit\u00e9 sur plusieurs baisses de taux cette ann\u00e9e.<\/p>\n\n<p>Du c\u00f4t\u00e9 des mati\u00e8res premi\u00e8res, l\u2019or et l\u2019argent profitent de leur r\u00f4le de valeurs refuges (actifs recherch\u00e9s en p\u00e9riode d\u2019incertitude), notamment face aux craintes de stagflation.<\/p>\n\n<p>Les actions, surtout le S&amp;P 500 (indice des 500 grandes valeurs am\u00e9ricaines) et le Nasdaq (indice tr\u00e8s expos\u00e9 \u00e0 la technologie), ont poursuivi leur hausse, encha\u00eenant de nouveaux records. Le mouvement est port\u00e9 par l\u2019espoir d\u2019un assouplissement de la Fed.<\/p>\n\n<p>Hors \u00c9tats-Unis, la Banque centrale europ\u00e9enne (BCE) fait face \u00e0 une situation diff\u00e9rente. L\u2019inflation en zone euro reste \u00e9lev\u00e9e, surtout dans les services, tandis que la croissance stagne. La prudence de la BCE contraste avec une Fed plus accommodante (plus encline \u00e0 baisser les taux), ce qui cr\u00e9e une divergence (\u00e9cart de politique mon\u00e9taire) pouvant soutenir l\u2019euro \u00e0 court terme.<\/p>\n\n<p>Au Japon, la Banque du Japon (BoJ) s\u2019\u00e9loigne progressifement d\u2019une politique tr\u00e8s accommodante (taux tr\u00e8s bas et soutien important \u00e0 l\u2019\u00e9conomie). Cela a provoqu\u00e9 des mouvements marqu\u00e9s sur les paires en yen, avec une volatilit\u00e9 plus \u00e9lev\u00e9e. Ces paires deviennent tr\u00e8s sensibles au moindre changement de discours de la BoJ.<\/p>\n\n<p>Les mati\u00e8res premi\u00e8res sont aussi influenc\u00e9es par ces divergences. Le p\u00e9trole est tiraill\u00e9 entre des contraintes d\u2019offre (production, stocks, capacit\u00e9) et la crainte d\u2019une demande mondiale plus faible si le risque de r\u00e9cession augmente. L\u2019or et l\u2019argent restent des instruments de couverture (hedge, actifs destin\u00e9s \u00e0 r\u00e9duire un risque), soutenus par un dollar plus faible et l\u2019incertitude g\u00e9opolitique.<\/p>\n\n<p>Sur le march\u00e9 des cryptoactifs (actifs num\u00e9riques), une acc\u00e9l\u00e9ration des baisses de taux de la Fed pourrait relancer l\u2019\u00e9lan sur le Bitcoin et l\u2019Ethereum, ainsi que sur des altcoins (cryptomonnaies autres que le bitcoin) g\u00e9n\u00e9ralement favoris\u00e9s par ces conditions.<\/p>\n\n<p>La divergence entre banques centrales entretient un environnement volatil et cr\u00e9e des opportunit\u00e9s sur le forex, les mati\u00e8res premi\u00e8res et les indices. Les op\u00e9rateurs doivent surveiller les changements de cap et surtout le discours des banques centrales, au-del\u00e0 des chiffres mis en avant.<\/p>\n\n<p>Sur le march\u00e9 des changes, septembre a \u00e9t\u00e9 marqu\u00e9 par des mouvements li\u00e9s \u00e0 l\u2019\u00e9volution des politiques des banques centrales.<\/p>\n\n<p>La volatilit\u00e9 est revenue sur le forex en septembre. La Fed a bien abaiss\u00e9 ses taux de 25 points de base (0,25 point de pourcentage), comme attendu. Mais le ton de Jerome Powell, \u00e9voquant des \u00ab d\u00e9cisions difficiles \u00bb, a soutenu le dollar.<\/p>\n\n<p>Ces difficult\u00e9s tiennent au risque de stagflation: \u00e9viter une r\u00e9cession dans un contexte de croissance lente, sans assouplir trop vite au risque de raviver une inflation qui reste \u00e9lev\u00e9e, notamment \u00e0 cause de droits de douane (tarifs, taxes \u00e0 l\u2019importation) plus importants.<\/p>\n\n<p>De nouvelles baisses de taux de la Fed pourraient relancer la faiblesse du dollar, ce qui soutiendrait des devises majeures comme l\u2019euro, la livre et le dollar australien. Les devises des pays \u00e9mergents (\u00e9conomies en d\u00e9veloppement) pourraient aussi en profiter.<\/p>\n\n<p>De son c\u00f4t\u00e9, la BoJ avance vers une normalisation (retour progressif \u00e0 une politique moins accommodante) sans brusquer les march\u00e9s. La hausse du yen est rest\u00e9e limit\u00e9e, car une faiblesse du dollar peut aussi peser sur le calendrier de futures hausses de taux au Japon.<\/p>\n\n\n<figure class=\"wp-block-image size-full is-resized\"><img decoding=\"async\" src=\"https:\/\/www.vtmarkets.com\/wp-content\/uploads\/2025\/10\/filename.jpeg\" alt=\"\" class=\"wp-image-31467\" style=\"width:840px;height:auto\" \/><\/figure>\n\n\n<p><em>Figure 1: Graphique USDJPY en 4 heures, montrant une \u00e9volution en range (cours oscillant dans un couloir) en attente de davantage de clart\u00e9 sur la politique des banques centrales<\/em><\/p>\n\n\n<h2 class=\"wp-block-heading has-medium-font-size\">Or<\/h2>\n\n\n<p>Sur les m\u00e9taux pr\u00e9cieux, l\u2019or et l\u2019argent ont prolong\u00e9 leur hausse dans un contexte incertain.<\/p>\n\n<p>L\u2019or et l\u2019argent profitent d\u2019un dollar plus faible et d\u2019un environnement macro\u00e9conomique (conjoncture: croissance, inflation, emploi) et g\u00e9opolitique tendu. En septembre, les deux ont inscrit de nouveaux sommets. L\u2019argent \u00e9volue sur des plus hauts de 14 ans, en direction de 45 dollars, tandis que l\u2019or a aussi touch\u00e9 de nouveaux records.<\/p>\n\n<p>De futures baisses de taux et un dollar plus faible soutiendraient la demande d\u2019or: libell\u00e9 en dollars, il devient moins cher pour les investisseurs non am\u00e9ricains et plus attractif. Ce soutien est renforc\u00e9 lorsque les baisses de taux r\u00e9pondent \u00e0 des inqui\u00e9tudes sur la croissance et \u00e0 des craintes de stagflation, ce qui pousse vers les valeurs refuges.<\/p>\n\n<p>La demande des banques centrales et des investisseurs institutionnels (grands acteurs financiers) reste solide. Les entr\u00e9es dans les ETF or (fonds cot\u00e9s en Bourse r\u00e9pliquant le prix de l\u2019or) indiquent un int\u00e9r\u00eat maintenu malgr\u00e9 des prix \u00e9lev\u00e9s et une tendance haussi\u00e8re prolong\u00e9e (march\u00e9 haussier).<\/p>\n\n\n<figure class=\"wp-block-image size-full is-resized\"><img decoding=\"async\" src=\"https:\/\/www.vtmarkets.com\/wp-content\/uploads\/2025\/10\/filename1.jpeg\" alt=\"\" class=\"wp-image-31468\" style=\"width:840px;height:auto\" \/><\/figure>\n\n\n<p><em>Figure 2: Graphique quotidien de l\u2019or, montrant une sortie par le haut (franchissement d\u2019un niveau) vers de nouveaux records en septembre<\/em><\/p>\n\n\n<h2 class=\"wp-block-heading has-medium-font-size\">P\u00e9trole<\/h2>\n\n\n<p>Dans l\u2019\u00e9nergie, les prix du p\u00e9trole sont rest\u00e9s relativement stables, l\u2019\u00e9quilibre entre offre et demande dominant.<\/p>\n\n<p>En septembre, le p\u00e9trole a \u00e9volu\u00e9 dans une fourchette sous une r\u00e9sistance (niveau qui freine la hausse) autour de 65,50 dollars, avec un support (niveau qui freine la baisse) autour de 61,50 dollars.<\/p>\n\n<p>Le p\u00e9trole restera guid\u00e9 par la demande mondiale et l\u2019offre. La demande pourrait \u00eatre soutenue si les taux baissent encore: un dollar plus faible rend le p\u00e9trole moins cher \u00e0 l\u2019achat car il est cot\u00e9 en dollars.<\/p>\n\n<p>L\u2019offre continuera aussi de jouer. L\u2019OPEP+ (OPEP et pays alli\u00e9s, dont la Russie) a annonc\u00e9 en septembre poursuivre l\u2019augmentation de la production. Par ailleurs, une p\u00e9riode de maintenance des raffineries (arr\u00eats techniques) peut r\u00e9duire temporairement les volumes disponibles.<\/p>\n\n\n<figure class=\"wp-block-image size-full is-resized\"><img decoding=\"async\" src=\"https:\/\/www.vtmarkets.com\/wp-content\/uploads\/2025\/10\/filename2.jpeg\" alt=\"\" class=\"wp-image-31470\" style=\"width:840px;height:auto\" \/><\/figure>\n\n\n<p><em>Figure 3: Graphique du p\u00e9trole en 4 heures, montrant une \u00e9volution en range (couloir de prix) sur septembre<\/em><\/p>\n\n<p>Sur les indices boursiers, les \u00c9tats-Unis ont de nouveau inscrit des records malgr\u00e9 des signaux contrast\u00e9s.<\/p>\n\n\n<h2 class=\"wp-block-heading has-medium-font-size\">Indices<\/h2>\n\n\n<p>En octobre, les indices devraient rester volatils. Si la Fed poursuit les baisses de taux et si l\u2019inflation ralentit, les valeurs de croissance et de technologie pourraient progresser. \u00c0 l\u2019inverse, un discours restrictif (hawkish, favorable \u00e0 des taux plus \u00e9lev\u00e9s) de la Fed ou des signes de d\u00e9gradation \u00e9conomique pourraient peser fortement.<\/p>\n\n<p>Un dollar plus faible aide souvent les actions am\u00e9ricaines, surtout les valeurs de croissance et de technologie, car elles r\u00e9alisent une part importante de leurs revenus \u00e0 l\u2019\u00e9tranger: lors de la conversion en dollars, ces revenus peuvent augmenter.<\/p>\n\n\n<figure class=\"wp-block-image size-full is-resized\"><img decoding=\"async\" src=\"https:\/\/www.vtmarkets.com\/wp-content\/uploads\/2025\/10\/filename3.jpeg\" alt=\"\" class=\"wp-image-31471\" style=\"width:840px;height:auto\" \/><\/figure>\n\n\n<p><em>Figure 4: Graphique du Nasdaq 100 en 4 heures, montrant une sortie par le haut et une progression vers de nouveaux records en septembre<\/em><\/p>\n\n<p>Sur les actifs num\u00e9riques, les cryptomonnaies sont rest\u00e9es prudentes, tout en restant sensibles au dollar et aux taux.<\/p>\n\n<p>Le Bitcoin et l\u2019Ethereum ont marqu\u00e9 une pause en septembre, certains op\u00e9rateurs ayant pris des b\u00e9n\u00e9fices (vente apr\u00e8s une hausse) apr\u00e8s de fortes progressions depuis le d\u00e9but de l\u2019ann\u00e9e.<\/p>\n\n<p>Comme l\u2019or et le p\u00e9trole, de nombreux cryptoactifs r\u00e9agissent aux mouvements du dollar. Un dollar plus faible peut relancer la hausse, car ces actifs deviennent plus attractifs pour les acheteurs hors \u00c9tats-Unis.<\/p>\n\n<p>De plus, un dollar plus faible est souvent associ\u00e9 \u00e0 une politique mon\u00e9taire plus souple (conditions de financement plus faciles) et \u00e0 des taux r\u00e9els plus bas (taux d\u2019int\u00e9r\u00eat corrig\u00e9s de l\u2019inflation), deux facteurs g\u00e9n\u00e9ralement favorables aux actifs plus risqu\u00e9s comme les cryptomonnaies.<\/p>\n\n\n<figure class=\"wp-block-image size-full is-resized\"><img decoding=\"async\" src=\"https:\/\/www.vtmarkets.com\/wp-content\/uploads\/2025\/10\/filename4.jpeg\" alt=\"\" class=\"wp-image-31466\" style=\"width:840px;height:auto\" \/><\/figure>\n\n\n<p>Figure 5: Graphique Ethereum en 4 heures, montrant une \u00e9volution plus calme en range (couloir de prix) sur septembre<\/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>Volatilit\u00e9 en embuscade : divergences Fed-BCE-BoJ, risque de stagflation et tensions g\u00e9opolitiques bousculent forex, indices et mati\u00e8res premi\u00e8res. Dollar sous pression, or\/argent records, p\u00e9trole en range, cryptos suspendues aux taux.<\/p>\n","protected":false},"author":87,"featured_media":52533,"comment_status":"","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"_acf_changed":false,"footnotes":""},"categories":[33],"tags":[],"class_list":["post-52534","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-monthly-market-insights"],"acf":{"acf_article_selection_author":null},"aioseo_notices":[],"aioseo_head":"\n\t\t<!-- All in One SEO Pro 5.0.1 - aioseo.com -->\n\t<meta name=\"description\" content=\"Volatilit\u00e9 en embuscade : divergences Fed-BCE-BoJ, risque de stagflation et tensions g\u00e9opolitiques bousculent forex, indices et mati\u00e8res premi\u00e8res. 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