{"id":38114,"date":"2026-05-29T20:43:59","date_gmt":"2026-05-29T20:43:59","guid":{"rendered":"https:\/\/volity.io\/non-classifiee\/what-is-volatility-trading\/"},"modified":"2026-06-04T06:24:12","modified_gmt":"2026-06-04T06:24:12","slug":"what-is-volatility-trading","status":"publish","type":"post","link":"https:\/\/volity.io\/fr\/glossaire\/what-is-volatility-trading\/","title":{"rendered":"Qu&rsquo;est-ce que la volatilit\u00e9 en trading"},"content":{"rendered":"<h2>Comment fonctionne la volatilit\u00e9<\/h2>\n<p>La volatilit\u00e9 mesure l&rsquo;ampleur des mouvements d&rsquo;un prix sur une p\u00e9riode, en g\u00e9n\u00e9ral comme un \u00e9cart-type annualis\u00e9 des rendements. La volatilit\u00e9 historique regarde en arri\u00e8re ce qui s&rsquo;est pass\u00e9 ; la volatilit\u00e9 implicite est l&rsquo;estimation prospective du march\u00e9 int\u00e9gr\u00e9e aux options. Une forte volatilit\u00e9 signifie des oscillations plus larges dans les deux sens, ce qui augmente \u00e0 la fois l&rsquo;opportunit\u00e9 et le risque de chaque position. C&rsquo;est une mesure de mouvement, pas de direction.<\/p>\n<h2>Exemple chiffr\u00e9<\/h2>\n<p>Un actif \u00e0 80 % de volatilit\u00e9 annualis\u00e9e, courant en crypto, peut osciller de 5 % en une journ\u00e9e ; une grande paire forex pr\u00e8s de 8 % bouge rarement de 1 %. La m\u00eame position en dollars porte bien plus de risque sur l&rsquo;actif volatil, donc la taille doit baisser quand la volatilit\u00e9 monte pour garder le risque constant. C&rsquo;est pourquoi une taille de lot fixe est dangereuse d&rsquo;un instrument \u00e0 l&rsquo;autre : elle garde la taille constante alors que le risque varie.<\/p>\n<h2>Trader la volatilit\u00e9 elle-m\u00eame<\/h2>\n<p>Au-del\u00e0 de la direction, les traders prennent des vues sur la volatilit\u00e9 : anticiper le calme, anticiper un pic, ou r\u00e9colter l&rsquo;\u00e9cart entre implicite et r\u00e9alis\u00e9e. Ce sont des expressions avanc\u00e9es, en g\u00e9n\u00e9ral via les options ou des positions soigneusement dimensionn\u00e9es. La discipline de d\u00e9part est plus simple : dimensionnez chaque trade selon la volatilit\u00e9 actuelle de l&rsquo;instrument, pas selon une habitude, et \u00e9largissez les stops sur les actifs volatils.<\/p>\n<h2>Pourquoi c&rsquo;est important<\/h2>\n<p>C&rsquo;est la volatilit\u00e9, pas le prix affich\u00e9, qui d\u00e9termine la bonne taille de position et la distance du stop. Une strat\u00e9gie calibr\u00e9e sur un r\u00e9gime calme peut \u00eatre d\u00e9truite par un r\u00e9gime volatil avec des r\u00e8gles identiques. Lisez la volatilit\u00e9 du march\u00e9 avant de dimensionner, et r\u00e9duisez l&rsquo;exposition quand elle s&rsquo;\u00e9tend. \u00c0 lire aussi : <a href=\"https:\/\/volity.io\/fr\/glossaire\/what-is-drawdown\/\">drawdown<\/a> et <a href=\"https:\/\/volity.io\/fr\/glossaire\/what-is-position-sizing\/\">dimensionnement de position<\/a>.<\/p>\n<p>Pour aller plus loin, voir notre page <a href=\"https:\/\/volity.io\/fr\/forex\/\">forex<\/a>.<\/p>\n","protected":false},"excerpt":{"rendered":"<p>Comment fonctionne la volatilit\u00e9 La volatilit\u00e9 mesure l&rsquo;ampleur des mouvements d&rsquo;un prix sur une p\u00e9riode, en g\u00e9n\u00e9ral comme un \u00e9cart-type annualis\u00e9 des [&hellip;]<\/p>\n","protected":false},"author":2,"featured_media":38249,"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-38114","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 la volatilit\u00e9 en trading<\/title>\n<meta name=\"description\" content=\"La volatilit\u00e9 mesure la taille des mouvements de prix. 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