{"id":2195,"date":"2026-04-21T07:36:02","date_gmt":"2026-04-21T07:36:02","guid":{"rendered":"https:\/\/wizio.fr\/blog\/?p=2195"},"modified":"2026-04-21T07:37:29","modified_gmt":"2026-04-21T07:37:29","slug":"le-cout-invisible-du-market-timing","status":"publish","type":"post","link":"https:\/\/wizio.fr\/blog\/le-cout-invisible-du-market-timing\/","title":{"rendered":"Le co\u00fbt invisible du market timing"},"content":{"rendered":"\r\n<p>Le graphique ci-dessous est simple. Mais son message est brutal\u00a0: sur la p\u00e9riode 1996\u20132025, un investissement de 10 000 dollars sur le S&amp;P 500 atteint plus de 192 000 dollars en restant pleinement investi. Jusque-l\u00e0, rien de surprenant : c\u2019est la puissance de la capitalisation \u00e0 long terme. <br \/>Mais ce qui frappe, c\u2019est l\u2019impact de quelques jours seulement.<br \/>Manquer les 10 meilleures s\u00e9ances r\u00e9duit la valeur finale de plus de moiti\u00e9. Manquer les 20 ou 30 meilleures journ\u00e9es d\u00e9truit respectivement pr\u00e8s de 74% et 84% de la performance. Autrement dit, une poign\u00e9e de s\u00e9ances explique une part disproportionn\u00e9e de la cr\u00e9ation de richesse<\/p>\r\n\r\n\r\n\r\n<figure class=\"wp-block-image size-large\"><img fetchpriority=\"high\" decoding=\"async\" width=\"1024\" height=\"803\" class=\"wp-image-2196\" src=\"https:\/\/wizio.fr\/blog\/wp-content\/uploads\/2026\/04\/impact-market-timing-sp500-performance.png-1024x803.webp\" alt=\"\" srcset=\"https:\/\/wizio.fr\/blog\/wp-content\/uploads\/2026\/04\/impact-market-timing-sp500-performance.png-1024x803.webp 1024w, https:\/\/wizio.fr\/blog\/wp-content\/uploads\/2026\/04\/impact-market-timing-sp500-performance.png-300x235.webp 300w, https:\/\/wizio.fr\/blog\/wp-content\/uploads\/2026\/04\/impact-market-timing-sp500-performance.png-768x602.webp 768w, https:\/\/wizio.fr\/blog\/wp-content\/uploads\/2026\/04\/impact-market-timing-sp500-performance.png-1536x1204.webp 1536w, https:\/\/wizio.fr\/blog\/wp-content\/uploads\/2026\/04\/impact-market-timing-sp500-performance.png-2048x1605.webp 2048w\" sizes=\"(max-width: 1024px) 100vw, 1024px\" \/><\/figure>\r\n\r\n\r\n\r\n<h2 class=\"wp-block-heading\"><strong>Une r\u00e9alit\u00e9 contre-intuitive<\/strong><\/h2>\r\n\r\n\r\n\r\n<p>Ce constat va \u00e0 l\u2019encontre de nombreuses intuitions d\u2019investisseurs. Beaucoup pensent pouvoir am\u00e9liorer leur performance en \u00ab\u00a0\u00e9vitant les mauvaises p\u00e9riodes\u00a0\u00bb. En pratique, cela revient souvent \u00e0 essayer de faire du market timing : sortir quand les march\u00e9s baissent, revenir quand ils remontent. <br \/>Le probl\u00e8me est simple : <strong>les meilleures s\u00e9ances surviennent souvent dans des phases de stress<\/strong>. <br \/>Plusieurs \u00e9tudes acad\u00e9miques et analyses de soci\u00e9t\u00e9s comme JP Morgan ou Fidelity montrent que les plus fortes hausses journali\u00e8res interviennent fr\u00e9quemment \u00e0 proximit\u00e9 des plus fortes baisses. Sortir du march\u00e9 pour \u00e9viter la volatilit\u00e9 revient donc, m\u00e9caniquement, \u00e0 risquer de manquer ces rebonds.<\/p>\r\n\r\n\r\n\r\n<h2 class=\"wp-block-heading\"><strong>Le lien avec le comportement des investisseurs<\/strong><\/h2>\r\n\r\n\r\n\r\n<p>Ce graphique ne parle pas seulement de performance. Il parle de comportement. Les d\u00e9cisions d\u2019entr\u00e9e et de sortie sont rarement prises de mani\u00e8re rationnelle. Elles sont souvent dict\u00e9es par :<\/p>\r\n\r\n\r\n\r\n<ul class=\"wp-block-list\">\r\n<li>la peur apr\u00e8s une baisse,<\/li>\r\n\r\n\r\n\r\n<li>ou l\u2019euphorie apr\u00e8s une hausse.<\/li>\r\n<\/ul>\r\n\r\n\r\n\r\n<p>Or, ce sont pr\u00e9cis\u00e9ment ces moments o\u00f9 les march\u00e9s sont les plus instables\u2026 et o\u00f9 se produisent les mouvements extr\u00eames.<\/p>\r\n\r\n\r\n\r\n<h2 class=\"wp-block-heading\"><strong>Ce que cela implique concr\u00e8tement<\/strong><\/h2>\r\n\r\n\r\n\r\n<p>Le message n\u2019est pas qu\u2019il faut ignorer les risques. Il est plus subtil\u00a0:<\/p>\r\n\r\n\r\n\r\n<ul class=\"wp-block-list\">\r\n<li>Il est extr\u00eamement difficile, voire impossible, de capter les \u00ab\u00a0bons moments\u00a0\u00bb de march\u00e9 de mani\u00e8re syst\u00e9matique\u00a0;<\/li>\r\n\r\n\r\n\r\n<li>Et le co\u00fbt d\u2019une erreur (manquer quelques journ\u00e9es cl\u00e9s) est consid\u00e9rable.<\/li>\r\n<\/ul>\r\n\r\n\r\n\r\n<p>Cela plaide pour une approche diff\u00e9rente :<\/p>\r\n\r\n\r\n\r\n<ul class=\"wp-block-list\">\r\n<li>rester investi sur le long terme,<\/li>\r\n\r\n\r\n\r\n<li>accepter la volatilit\u00e9,<\/li>\r\n\r\n\r\n\r\n<li>et \u00e9viter les allers-retours tactiques non ma\u00eetris\u00e9s.<\/li>\r\n<\/ul>\r\n\r\n\r\n\r\n<p><strong>Conclusion<\/strong><br \/><strong>Les march\u00e9s ne r\u00e9mun\u00e8rent pas la capacit\u00e9 \u00e0 pr\u00e9dire parfaitement les points d\u2019entr\u00e9e et de sortie. Ils r\u00e9mun\u00e8rent la discipline. Et si ce graphique enseigne une chose, c\u2019est celle-ci : en bourse, le risque n\u2019est pas seulement de subir les mauvaises journ\u00e9es\u2026 c\u2019est aussi de ne pas \u00eatre pr\u00e9sent lors des meilleures.<\/strong><\/p>\r\n\r\n\r\n\r\n<p>&nbsp;<\/p>\r\n\r\n\r\n\r\n<p>Avertissement\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0<\/p>\r\n\r\n\r\n\r\n<p>Les informations contenues dans ce document ne constituent ni une offre de vente d&#8217;un investissement ou d&#8217;un produit financier, ni un service de conseil en investissement financier. Elles ne sont pas donn\u00e9es en relation avec un profil d&#8217;investisseur particulier ou formul\u00e9es \u00e0 destination d&#8217;un investisseur particulier. En cons\u00e9quence, seul l&#8217;interm\u00e9diaire financier destinataire du pr\u00e9sent document est habilit\u00e9 \u00e0 r\u00e9pondre aux questions d&#8217;ordre fiscal, juridique ou financier qui lui seraient pos\u00e9es par sa client\u00e8le concernant un quelconque investissement, li\u00e9 ou non aux OPCVM pr\u00e9sentes dans le pr\u00e9sent document. Aucune partie de ce document ne peut \u00eatre reproduite, stock\u00e9e sur des syst\u00e8mes informatiques ou transmise \u00e0\u0300 quiconque et par quelque moyen que ce soit, sans l\u2019autorisation expresse de Fundesys.<\/p>\r\n\r\n\r\n<hr class=\"wp-block-separator has-alpha-channel-opacity\" \/>\r\n\r\n\r\n<div class=\"wp-block-group is-nowrap is-layout-flex wp-container-core-group-is-layout-ad2f72ca wp-block-group-is-layout-flex\">\r\n<figure class=\"wp-block-image size-large is-resized\"><img decoding=\"async\" width=\"1024\" height=\"658\" class=\"wp-image-1834\" style=\"width: 190px; height: auto;\" src=\"https:\/\/wizio.fr\/blog\/wp-content\/uploads\/2025\/10\/nouveau_logo_fundesys-1024x658.jpg\" alt=\"\" srcset=\"https:\/\/wizio.fr\/blog\/wp-content\/uploads\/2025\/10\/nouveau_logo_fundesys-1024x658.jpg 1024w, https:\/\/wizio.fr\/blog\/wp-content\/uploads\/2025\/10\/nouveau_logo_fundesys-300x193.jpg 300w, https:\/\/wizio.fr\/blog\/wp-content\/uploads\/2025\/10\/nouveau_logo_fundesys-768x493.jpg 768w, https:\/\/wizio.fr\/blog\/wp-content\/uploads\/2025\/10\/nouveau_logo_fundesys.jpg 1126w\" sizes=\"(max-width: 1024px) 100vw, 1024px\" \/><\/figure>\r\n\r\n\r\n\r\n<p>Leader ind\u00e9pendant de l\u2019analyse et la s\u00e9lection de fonds, <a href=\"https:\/\/www.fundesys.com\/\"><em><strong><mark class=\"has-inline-color has-vivid-cyan-blue-color\" style=\"background-color: rgba(0, 0, 0, 0);\">FUNDESYS<\/mark> <\/strong><\/em><\/a>est une plateforme ind\u00e9pendante en recherche, due diligences, conseil en s\u00e9lection de fonds, allocation d\u2019actifs, construction et suivi de portefeuilles.<\/p>\r\n<\/div>\r\n\r\n\r\n\r\n<p>Dirig\u00e9e par Ludovic Fechner (fondateur en 2007) et G\u00e9rald Grant qui ont chacun plus de 25 ans d\u2019exp\u00e9rience en multigestion, FUNDESYS conseille aujourd\u2019hui 2 milliards d\u2019euros d\u2019actifs pour le compte de plus de 100 professionnels de l\u2019investissement dans des Cabinets de Gestion de Patrimoine et des Soci\u00e9t\u00e9s de Gestion, aussi bien des boutiques que de tr\u00e8s grandes.<\/p>\r\n\r\n\r\n\r\n<p>Soci\u00e9t\u00e9 \u00e0 taille humaine, choisir aujourd\u2019hui FUNDESYS, c\u2019est avoir l\u2019acc\u00e8s \u00e0 une large palette d\u2019outils \u00e0 forte valeur ajout\u00e9e qui permet de :<\/p>\r\n\r\n\r\n\r\n<ul class=\"wp-block-list\">\r\n<li>S\u00e9lectionner les fonds offrant les couples rendement\/risques pr\u00e9visionnels les plus pertinents dont environ 240 qui sont not\u00e9s et revus au moins trimestriellement\u00a0;<\/li>\r\n\r\n\r\n\r\n<li>Recevoir r\u00e9guli\u00e8rement de nouvelles analyses et id\u00e9es d\u2019investissement\u00a0: Lettre Hebdomadaire, Lettre Mensuelle, Flash d\u2019informations, News hebdo\u2026<\/li>\r\n\r\n\r\n\r\n<li>Faire un assemblage rationnel de fonds compl\u00e9mentaires et justement pond\u00e9r\u00e9s dans une allocation de portefeuille gr\u00e2ce aux portefeuille mod\u00e8le, \u00e0 la gestion pilot\u00e9e ou \u00e0 l\u2019accompagnement pour des fonds d\u00e9di\u00e9s\u00a0;<\/li>\r\n\r\n\r\n\r\n<li>Plus g\u00e9n\u00e9ralement, vous accompagner dans vos choix de s\u00e9lection et d\u2019allocation pour vous faire gagner du temps et faire face \u00e0 vos exigences r\u00e9glementaires.<\/li>\r\n<\/ul>\r\n\r\n\r\n\r\n<div class=\"wp-block-group is-nowrap is-layout-flex wp-container-core-group-is-layout-ad2f72ca wp-block-group-is-layout-flex\">\r\n<figure class=\"wp-block-image size-large is-resized\"><img decoding=\"async\" width=\"888\" height=\"1024\" class=\"wp-image-1669\" style=\"width: 127px; height: auto;\" src=\"https:\/\/wizio.fr\/blog\/wp-content\/uploads\/2025\/05\/Photo-Gerald-Grant-et-Ludovic-Fechner-fd-gris-888x1024.jpg\" alt=\"\" srcset=\"https:\/\/wizio.fr\/blog\/wp-content\/uploads\/2025\/05\/Photo-Gerald-Grant-et-Ludovic-Fechner-fd-gris-888x1024.jpg 888w, https:\/\/wizio.fr\/blog\/wp-content\/uploads\/2025\/05\/Photo-Gerald-Grant-et-Ludovic-Fechner-fd-gris-260x300.jpg 260w, https:\/\/wizio.fr\/blog\/wp-content\/uploads\/2025\/05\/Photo-Gerald-Grant-et-Ludovic-Fechner-fd-gris-768x886.jpg 768w, https:\/\/wizio.fr\/blog\/wp-content\/uploads\/2025\/05\/Photo-Gerald-Grant-et-Ludovic-Fechner-fd-gris.jpg 1080w\" sizes=\"(max-width: 888px) 100vw, 888px\" \/><\/figure>\r\n\r\n\r\n\r\n<p><br \/><br \/><br \/><br \/><br \/><br \/>+33 (7) 60 40 14 78<br \/><a href=\"https:\/\/www.fundesys.com\/\"><\/a><strong><strong><em><a href=\"https:\/\/www.fundesys.com\/\"><\/a><em><a href=\"http:\/\/www.fundesys.com\/contact.aspx\">www.fundesys.com\/contact.aspx<\/a><\/em><\/em><\/strong><\/strong><br \/><br \/><br \/><\/p>\r\n<\/div>\r\n","protected":false},"excerpt":{"rendered":"<p>Le graphique ci-dessous est simple. Mais son message est brutal\u00a0: sur la p\u00e9riode 1996\u20132025, un investissement de 10 000 dollars sur le S&amp;P 500 atteint plus de 192 000 dollars en restant pleinement investi. Jusque-l\u00e0, rien de surprenant : c\u2019est la puissance de la capitalisation \u00e0 long terme. Mais ce qui frappe, c\u2019est l\u2019impact de [&hellip;]<\/p>\n","protected":false},"author":2,"featured_media":2202,"comment_status":"closed","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[78],"tags":[],"class_list":["post-2195","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-fundesys-news"],"yoast_head":"<!-- This site is optimized with the Yoast SEO plugin v27.4 - https:\/\/yoast.com\/product\/yoast-seo-wordpress\/ -->\n<title>Le co\u00fbt invisible du market timing - Wizio<\/title>\n<meta name=\"description\" content=\"Manquer quelques jours cl\u00e9s en bourse peut r\u00e9duire drastiquement la performance. 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