{"id":38130,"date":"2026-05-29T20:44:50","date_gmt":"2026-05-29T20:44:50","guid":{"rendered":"https:\/\/volity.io\/non-classifiee\/what-is-alpha-investing\/"},"modified":"2026-06-04T11:44:22","modified_gmt":"2026-06-04T11:44:22","slug":"what-is-alpha-investing","status":"publish","type":"post","link":"https:\/\/volity.io\/fr\/glossaire\/what-is-alpha-investing\/","title":{"rendered":"Qu&rsquo;est-ce que l&rsquo;alpha en investissement"},"content":{"rendered":"<h2>Comment fonctionne l&rsquo;alpha<\/h2>\n<p>L&rsquo;alpha est le rendement qu&rsquo;un placement gagne au-dessus de son indice de r\u00e9f\u00e9rence apr\u00e8s ajustement du risque. Si un fonds rend 12 % quand son indice rend 10 %, les 2 % de plus sont l&rsquo;alpha, la part attribu\u00e9e au talent plut\u00f4t qu&rsquo;au simple fait de suivre le march\u00e9. Un alpha positif signifie que vous avez battu le march\u00e9 pour le risque pris ; un alpha nul que vous l&rsquo;avez \u00e9gal\u00e9 ; un alpha n\u00e9gatif que vous avez sous-perform\u00e9. C&rsquo;est le bulletin de la gestion active.<\/p>\n<h2>Exemple chiffr\u00e9<\/h2>\n<p>Vous b\u00e2tissez un portefeuille d&rsquo;actions qui rend 15 % une ann\u00e9e o\u00f9 son indice de r\u00e9f\u00e9rence rend 11 %. En surface, c&rsquo;est 4 % de surperformance. Mais si votre portefeuille a pris plus de risque pour y arriver, une partie de cet \u00e9cart n&rsquo;est que du <a href=\"https:\/\/volity.io\/fr\/glossaire\/what-is-beta-investing\/\">b\u00eata<\/a> suppl\u00e9mentaire, pas du talent. Le vrai alpha est ce qui reste apr\u00e8s avoir retir\u00e9 le rendement attendu du risque port\u00e9.<\/p>\n<h2>Pourquoi l&rsquo;alpha est difficile \u00e0 garder<\/h2>\n<p>La plupart des strat\u00e9gies actives \u00e9chouent \u00e0 produire un alpha durable apr\u00e8s frais, car tout avantage reproductible se fait copier et dispara\u00eetre. Le vrai alpha tend \u00e0 \u00eatre petit, fugace et co\u00fbteux \u00e0 trouver. Sur Volity, vous poursuivez votre propre avantage sur les actions, le forex et les CFD, mais mesurez-le honn\u00eatement face \u00e0 un buy-and-hold, pas face \u00e0 z\u00e9ro. Battre le march\u00e9 est la barre, pas seulement gagner de l&rsquo;argent.<\/p>\n<h2>Pourquoi c&rsquo;est important<\/h2>\n<p>L&rsquo;alpha s\u00e9pare le vrai talent d&rsquo;un march\u00e9 qui monte, raison pour laquelle un rendement de 20 % une ann\u00e9e o\u00f9 l&rsquo;indice a pris 25 % est en fait une sous-performance. Jugez toute strat\u00e9gie, y compris la v\u00f4tre, face au bon indice. \u00c0 lire aussi : <a href=\"https:\/\/volity.io\/fr\/glossaire\/what-is-sharpe-ratio\/\">ratio de Sharpe<\/a> et <a href=\"https:\/\/volity.io\/fr\/glossaire\/what-is-beta-investing\/\">b\u00eata<\/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 l&rsquo;alpha L&rsquo;alpha est le rendement qu&rsquo;un placement gagne au-dessus de son indice de r\u00e9f\u00e9rence apr\u00e8s ajustement du risque. Si un [&hellip;]<\/p>\n","protected":false},"author":2,"featured_media":38152,"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-38130","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 l&#039;alpha en investissement<\/title>\n<meta name=\"description\" content=\"L&#039;alpha est le rendement exc\u00e9dentaire au-dessus de ce que le b\u00eata march\u00e9 pr\u00e9dirait. 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