{"id":11028,"date":"2026-06-19T23:12:15","date_gmt":"2026-06-19T21:12:15","guid":{"rendered":"https:\/\/www.api.parlonsfinance.fr\/?p=11028"},"modified":"2026-06-19T23:12:16","modified_gmt":"2026-06-19T21:12:16","slug":"comment-investir-quand-les-marches-sont-au-plus-haut","status":"publish","type":"post","link":"https:\/\/www.api.parlonsfinance.fr\/index.php\/2026\/06\/19\/comment-investir-quand-les-marches-sont-au-plus-haut\/","title":{"rendered":"Comment investir quand les march\u00e9s sont au plus haut ?"},"content":{"rendered":"\n<h2 class=\"wp-block-heading\">\u00c0 chaque nouveau record boursier, la m\u00eame question revient : Est-ce vraiment le bon moment pour investir ? L&rsquo;inqui\u00e9tude est compr\u00e9hensible. <\/h2>\n\n\n\n<p class=\"wp-block-paragraph\">Acheter apr\u00e8s plusieurs ann\u00e9es de hausse donne souvent l&rsquo;impression d&rsquo;arriver trop tard, juste avant une \u00e9ventuelle correction.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">Pourtant, cette r\u00e9flexion repose souvent sur une confusion entre deux notions diff\u00e9rentes : le niveau actuel du march\u00e9 et son rendement futur \u00e0 long terme.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">Avant de continuer, un grand merci \u00e0 notre sponsor Trade Republic pour son soutien \ud83e\udd1d<\/p>\n\n\n\n<figure class=\"wp-block-image\"><a href=\"https:\/\/trade.re\/parlonsfinance\"><img loading=\"lazy\" decoding=\"async\" width=\"1024\" height=\"576\" src=\"https:\/\/www.api.parlonsfinance.fr\/wp-content\/uploads\/2024\/09\/Trade-Republic-avis-1-1024x576.jpg\" alt=\"\" class=\"wp-image-3993\" srcset=\"https:\/\/www.api.parlonsfinance.fr\/wp-content\/uploads\/2024\/09\/Trade-Republic-avis-1-1024x576.jpg 1024w, https:\/\/www.api.parlonsfinance.fr\/wp-content\/uploads\/2024\/09\/Trade-Republic-avis-1-300x169.jpg 300w, https:\/\/www.api.parlonsfinance.fr\/wp-content\/uploads\/2024\/09\/Trade-Republic-avis-1-768x432.jpg 768w, https:\/\/www.api.parlonsfinance.fr\/wp-content\/uploads\/2024\/09\/Trade-Republic-avis-1-1536x864.jpg 1536w, https:\/\/www.api.parlonsfinance.fr\/wp-content\/uploads\/2024\/09\/Trade-Republic-avis-1-2048x1152.jpg 2048w, https:\/\/www.api.parlonsfinance.fr\/wp-content\/uploads\/2024\/09\/Trade-Republic-avis-1-1920x1080.jpg 1920w, https:\/\/www.api.parlonsfinance.fr\/wp-content\/uploads\/2024\/09\/Trade-Republic-avis-1-1170x658.jpg 1170w, https:\/\/www.api.parlonsfinance.fr\/wp-content\/uploads\/2024\/09\/Trade-Republic-avis-1-585x329.jpg 585w\" sizes=\"auto, (max-width: 1024px) 100vw, 1024px\" \/><\/a><\/figure>\n\n\n\n<div class=\"wp-block-buttons is-layout-flex wp-block-buttons-is-layout-flex\">\n<div class=\"wp-block-button has-custom-width wp-block-button__width-75\"><a class=\"wp-block-button__link has-small-font-size has-custom-font-size wp-element-button\" href=\"https:\/\/trade.re\/parlonsfinance\" style=\"border-top-left-radius:180px;border-top-right-radius:180px;border-bottom-left-radius:180px;border-bottom-right-radius:180px\"><strong>J\u2019ouvre mon compte Trade Republic<\/strong><\/a><\/div>\n<\/div>\n\n\n\n<h3 class=\"wp-block-heading\">Un march\u00e9 au plus haut n&rsquo;est pas une situation exceptionnelle<\/h3>\n\n\n\n<p class=\"wp-block-paragraph\">Beaucoup d&rsquo;investisseurs consid\u00e8rent un record historique comme un signal d&rsquo;alerte.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">En r\u00e9alit\u00e9, dans un march\u00e9 haussier de long terme, les records sont fr\u00e9quents. Si l&rsquo;\u00e9conomie progresse, que les entreprises innovent, augmentent leurs b\u00e9n\u00e9fices et cr\u00e9ent de la valeur, les indices boursiers sont naturellement amen\u00e9s \u00e0 atteindre r\u00e9guli\u00e8rement de nouveaux sommets.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">Prenons un exemple simple. Un investisseur qui aurait refus\u00e9 d&rsquo;investir sur le S&amp;P 500 parce qu&rsquo;il \u00e9tait \u00e0 son plus haut en 2013, 2017 ou 2021 aurait manqu\u00e9 plusieurs ann\u00e9es de progression suppl\u00e9mentaires.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">Un plus haut historique ne signifie pas n\u00e9cessairement qu&rsquo;un march\u00e9 est sur\u00e9valu\u00e9. Cela signifie simplement que les investisseurs sont pr\u00eats \u00e0 payer davantage aujourd&rsquo;hui qu&rsquo;auparavant pour d\u00e9tenir les entreprises qui composent l&rsquo;indice.<\/p>\n\n\n\n<h3 class=\"wp-block-heading\">Ce qui compte n&rsquo;est pas le prix, mais la valorisation<\/h3>\n\n\n\n<p class=\"wp-block-paragraph\">L&rsquo;erreur la plus fr\u00e9quente consiste \u00e0 penser qu&rsquo;un march\u00e9 est cher uniquement parce qu&rsquo;il a beaucoup mont\u00e9.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">Or, une hausse des cours peut \u00eatre parfaitement justifi\u00e9e si les b\u00e9n\u00e9fices des entreprises progressent eux aussi.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">Pour \u00e9valuer si un march\u00e9 est r\u00e9ellement tendu, les investisseurs regardent g\u00e9n\u00e9ralement des indicateurs de valorisation :<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li>le ratio cours\/b\u00e9n\u00e9fices (PER) ;<\/li>\n\n\n\n<li>le ratio cours\/chiffre d&rsquo;affaires ;<\/li>\n\n\n\n<li>les marges des entreprises ;<\/li>\n\n\n\n<li>les taux d&rsquo;int\u00e9r\u00eat ;<\/li>\n\n\n\n<li>les perspectives de croissance \u00e9conomique.<\/li>\n<\/ul>\n\n\n\n<p class=\"wp-block-paragraph\">Un indice peut \u00eatre \u00e0 son plus haut tout en restant raisonnablement valoris\u00e9. \u00c0 l&rsquo;inverse, un march\u00e9 peut avoir d\u00e9j\u00e0 fortement corrig\u00e9 tout en demeurant cher si les b\u00e9n\u00e9fices se d\u00e9gradent rapidement. Le niveau absolu d&rsquo;un indice donne donc peu d&rsquo;informations \u00e0 lui seul.<\/p>\n\n\n\n<h3 class=\"wp-block-heading\">Les rendements futurs ont tendance \u00e0 diminuer lorsque les valorisations sont \u00e9lev\u00e9es<\/h3>\n\n\n\n<p class=\"wp-block-paragraph\">C&rsquo;est ici que le d\u00e9bat devient plus int\u00e9ressant. Si les records historiques ne permettent pas de pr\u00e9dire une baisse imminente, les valorisations \u00e9lev\u00e9es ont souvent un impact sur les rendements futurs attendus.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">Lorsque les investisseurs acceptent de payer tr\u00e8s cher les b\u00e9n\u00e9fices des entreprises, une partie de la performance future est d\u00e9j\u00e0 int\u00e9gr\u00e9e dans les prix.  Historiquement, les p\u00e9riodes o\u00f9 les valorisations sont tr\u00e8s \u00e9lev\u00e9es ont souvent \u00e9t\u00e9 suivies de rendements plus modestes sur les dix ann\u00e9es suivantes.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">Cela ne signifie pas que le march\u00e9 va chuter demain. Cela signifie simplement que le potentiel de performance peut \u00eatre moins important que lors de p\u00e9riodes o\u00f9 les actifs \u00e9taient moins chers.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">Autrement dit : Les valorisations influencent davantage les rendements futurs de long terme que les performances des prochains mois.<\/p>\n\n\n\n<h3 class=\"wp-block-heading\">Le co\u00fbt de l&rsquo;attente est souvent sous-estim\u00e9<\/h3>\n\n\n\n<p class=\"wp-block-paragraph\">Face \u00e0 un march\u00e9 jug\u00e9 cher, de nombreux investisseurs pr\u00e9f\u00e8rent attendre une correction.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">Le probl\u00e8me est que cette strat\u00e9gie implique deux d\u00e9cisions particuli\u00e8rement difficiles :<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li>savoir quand sortir ou ne pas entrer ;<\/li>\n\n\n\n<li>savoir quand revenir.<\/li>\n<\/ul>\n\n\n\n<ol start=\"1\" class=\"wp-block-list\"><\/ol>\n\n\n\n<p class=\"wp-block-paragraph\">M\u00eame si une correction finit par arriver, rien ne garantit qu&rsquo;elle ram\u00e8nera les march\u00e9s sous le niveau auquel l&rsquo;investisseur aurait pu acheter initialement.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">C&rsquo;est ce qui explique pourquoi de nombreux investisseurs restent plusieurs ann\u00e9es en liquidit\u00e9s en attendant un point d&rsquo;entr\u00e9e qui ne se pr\u00e9sente jamais.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">Pendant ce temps, le co\u00fbt d&rsquo;opportunit\u00e9 s&rsquo;accumule :<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li>dividendes non per\u00e7us ;<\/li>\n\n\n\n<li>croissance des b\u00e9n\u00e9fices non capt\u00e9e ;<\/li>\n\n\n\n<li>effet des int\u00e9r\u00eats compos\u00e9s retard\u00e9.<\/li>\n<\/ul>\n\n\n\n<p class=\"wp-block-paragraph\">Le risque d&rsquo;attendre est souvent moins visible que le risque de perdre temporairement de l&rsquo;argent, mais il peut \u00eatre tout aussi important.<\/p>\n\n\n\n<h3 class=\"wp-block-heading\">Investir progressivement : une r\u00e9ponse plus psychologique que financi\u00e8re<\/h3>\n\n\n\n<p class=\"wp-block-paragraph\">Lorsque les march\u00e9s semblent particuli\u00e8rement \u00e9lev\u00e9s, l&rsquo;investissement progressif (DCA) est souvent pr\u00e9sent\u00e9 comme une solution.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">D&rsquo;un point de vue statistique, investir imm\u00e9diatement une somme disponible a historiquement produit de meilleurs r\u00e9sultats dans la majorit\u00e9 des cas, simplement parce que les march\u00e9s montent plus souvent qu&rsquo;ils ne baissent.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">Cependant, investir progressivement pr\u00e9sente un avantage majeur : il r\u00e9duit le risque \u00e9motionnel.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">Cette approche permet d&rsquo;accepter plus facilement l&rsquo;incertitude et limite le regret potentiel en cas de correction rapide apr\u00e8s l&rsquo;investissement.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">La meilleure strat\u00e9gie n&rsquo;est donc pas toujours celle qui maximise th\u00e9oriquement le rendement, mais celle que l&rsquo;investisseur est capable de suivre durablement.<\/p>\n\n\n\n<h3 class=\"wp-block-heading\">Ce que les investisseurs de long terme devraient retenir<\/h3>\n\n\n\n<p class=\"wp-block-paragraph\">Pour un investisseur dont l&rsquo;horizon est de plusieurs d\u00e9cennies, la question du \u00ab\u00a0bon moment\u00a0\u00bb est souvent surestim\u00e9e.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">Les performances \u00e0 long terme d\u00e9pendent davantage :<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li>du temps pass\u00e9 sur le march\u00e9 ;<\/li>\n\n\n\n<li>du montant r\u00e9guli\u00e8rement investi ;<\/li>\n\n\n\n<li>des frais ;<\/li>\n\n\n\n<li>de la diversification ;<\/li>\n\n\n\n<li>de la discipline comportementale.<\/li>\n<\/ul>\n\n\n\n<p class=\"wp-block-paragraph\">Les march\u00e9s peuvent corriger apr\u00e8s un record historique. Ils peuvent aussi continuer \u00e0 progresser pendant plusieurs ann\u00e9es. Personne ne le sait avec certitude.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">En revanche, ce que l&rsquo;histoire financi\u00e8re montre de mani\u00e8re relativement constante, c&rsquo;est que les investisseurs qui attendent le point d&rsquo;entr\u00e9e parfait finissent souvent par perdre quelque chose de plus pr\u00e9cieux que quelques points de performance : du temps. Et en investissement, le temps reste l&rsquo;actif le plus difficile \u00e0 remplacer.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\"><\/p>\n","protected":false},"excerpt":{"rendered":"<p>\u00c0 chaque nouveau record boursier, la m\u00eame question revient : Est-ce vraiment le bon moment pour investir ? L&rsquo;inqui\u00e9tude est compr\u00e9hensible. Acheter apr\u00e8s plusieurs ann\u00e9es de hausse donne souvent l&rsquo;impression d&rsquo;arriver trop tard, juste avant une \u00e9ventuelle correction. Pourtant, cette r\u00e9flexion repose souvent sur une confusion entre deux notions diff\u00e9rentes : le niveau actuel du [&hellip;]<\/p>\n","protected":false},"author":22,"featured_media":10599,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"_acf_changed":false,"footnotes":""},"categories":[13,3,793],"tags":[10,7,5,23,109],"class_list":["post-11028","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-banque-finance","category-bourse","category-highlighted","tag-bourse","tag-business","tag-finance","tag-investissement","tag-trading"],"acf":[],"aioseo_notices":[],"aioseo_head":"\n\t\t<!-- All in One SEO 5.0.3 - aioseo.com -->\n\t<meta name=\"description\" content=\"\u00c0 chaque nouveau record boursier, la m\u00eame question revient : Est-ce vraiment le bon moment pour investir ? 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