{"id":38122,"date":"2026-05-29T20:44:24","date_gmt":"2026-05-29T20:44:24","guid":{"rendered":"https:\/\/volity.io\/non-classifiee\/what-is-beta-investing\/"},"modified":"2026-06-04T11:44:22","modified_gmt":"2026-06-04T11:44:22","slug":"what-is-beta-investing","status":"publish","type":"post","link":"https:\/\/volity.io\/fr\/glossaire\/what-is-beta-investing\/","title":{"rendered":"Qu&rsquo;est-ce que le b\u00eata en investissement"},"content":{"rendered":"<h2>Comment fonctionne le b\u00eata<\/h2>\n<p>Le b\u00eata mesure de combien un actif bouge par rapport \u00e0 l&rsquo;ensemble du march\u00e9. Un b\u00eata de 1,0 signifie qu&rsquo;il tend \u00e0 bouger comme le march\u00e9 ; 1,5 qu&rsquo;il oscille 50 % plus fort dans les deux sens ; 0,5 qu&rsquo;il bouge moiti\u00e9 moins. Le b\u00eata est la jauge standard du risque de march\u00e9 d&rsquo;un actif, la part de sa volatilit\u00e9 qui vient du march\u00e9 lui-m\u00eame plut\u00f4t que de ce qui est propre \u00e0 l&rsquo;entreprise.<\/p>\n<h2>Exemple chiffr\u00e9<\/h2>\n<p>Le march\u00e9 monte de 10 %. Une action de b\u00eata 1,5 devrait monter d&rsquo;environ 15 % ; une action de b\u00eata 0,6 d&rsquo;environ 6 %. Quand le march\u00e9 baisse de 10 %, les m\u00eames relations valent \u00e0 l&rsquo;envers : l&rsquo;action \u00e0 fort b\u00eata perd environ 15 %, celle \u00e0 faible b\u00eata environ 6 %. Un b\u00eata \u00e9lev\u00e9 amplifie \u00e0 la fois les gains et les <a href=\"https:\/\/volity.io\/fr\/glossaire\/what-is-drawdown\/\">drawdowns<\/a>.<\/p>\n<h2>Pourquoi le b\u00eata fa\u00e7onne un portefeuille<\/h2>\n<p>Le b\u00eata vous dit comment une position se comporte dans un mouvement de march\u00e9, pour b\u00e2tir un portefeuille avec la volatilit\u00e9 que vous voulez vraiment. Un portefeuille bourr\u00e9 de noms \u00e0 fort b\u00eata s&rsquo;envolera et plongera bien plus que l&rsquo;indice. Sur Volity, vous pouvez \u00e9quilibrer une exposition de croissance \u00e0 fort b\u00eata avec des d\u00e9fensives \u00e0 faible b\u00eata, et dimensionner les positions selon leur b\u00eata pour qu&rsquo;un seul nom volatil ne domine pas votre risque.<\/p>\n<h2>Pourquoi c&rsquo;est important<\/h2>\n<p>Le b\u00eata est la lecture la plus propre du risque de march\u00e9 que vous portez, et l&rsquo;ignorer revient \u00e0 \u00eatre surpris par l&rsquo;ampleur de la chute de votre portefeuille dans une correction. Servez-vous-en pour r\u00e9gler d\u00e9lib\u00e9r\u00e9ment la volatilit\u00e9 au niveau du portefeuille. \u00c0 lire aussi : <a href=\"https:\/\/volity.io\/fr\/glossaire\/what-is-alpha-investing\/\">alpha<\/a> et <a href=\"https:\/\/volity.io\/fr\/glossaire\/what-is-volatility-trading\/\">volatilit\u00e9<\/a>.<\/p>\n<p>Pour aller plus loin, voir notre page <a href=\"https:\/\/volity.io\/fr\/actions\/\">actions<\/a>.<\/p>\n","protected":false},"excerpt":{"rendered":"<p>Comment fonctionne le b\u00eata Le b\u00eata mesure de combien un actif bouge par rapport \u00e0 l&rsquo;ensemble du march\u00e9. Un b\u00eata de 1,0 [&hellip;]<\/p>\n","protected":false},"author":2,"featured_media":38153,"comment_status":"closed","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"inline_featured_image":false,"custom_schema":"","footnotes":""},"categories":[258],"tags":[],"class_list":["post-38122","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-glossaire"],"yoast_head":"<!-- This site is optimized with the Yoast SEO Premium plugin v27.7 (Yoast SEO v27.8) - https:\/\/yoast.com\/product\/yoast-seo-premium-wordpress\/ -->\n<title>Qu&#039;est-ce que le b\u00eata en investissement<\/title>\n<meta name=\"description\" content=\"Le b\u00eata mesure combien un actif bouge avec le march\u00e9. 1,0 c&#039;est le march\u00e9, 2,0 le double, n\u00e9gatif \u00e0 l&#039;inverse.\" \/>\n<meta name=\"robots\" content=\"index, follow, max-snippet:-1, max-image-preview:large, max-video-preview:-1\" \/>\n<link rel=\"canonical\" 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