{"id":34602,"date":"2026-05-07T21:59:11","date_gmt":"2026-05-07T21:59:11","guid":{"rendered":"https:\/\/volity.io\/blog\/what-are-synthetic-indices-2\/"},"modified":"2026-05-19T17:52:42","modified_gmt":"2026-05-19T17:52:42","slug":"what-are-synthetic-indices","status":"publish","type":"post","link":"https:\/\/volity.io\/fr\/actions\/what-are-synthetic-indices\/","title":{"rendered":"Que sont les indices synth\u00e9tiques ?"},"content":{"rendered":"\n    <style>\n    .vd-wrap {\n        display: flex;\n        align-items: flex-start;\n        gap: 20px;\n        background: #ffffff;\n        border: 1px solid #f2f4f7;\n        border-left: 4px solid #c0392b;\n        border-radius: 12px;\n        padding: 24px;\n        margin: 30px 0;\n        box-sizing: border-box;\n        width: 100%;\n        box-shadow: 0 4px 20px rgba(0,0,0,0.04);\n        position: relative;\n        overflow: hidden;\n    }\n    .vd-wrap::after {\n        content: \"\";\n        position: absolute;\n        right: -20px;\n        bottom: -20px;\n        width: 100px;\n        height: 100px;\n        background: radial-gradient(circle, rgba(192, 57, 43, 0.03) 0%, transparent 70%);\n        pointer-events: none;\n    }\n    .vd-icon {\n        flex-shrink: 0;\n        background: #fff5f4;\n        border: 1px solid #fee2e1;\n        border-radius: 8px;\n        width: 40px;\n        height: 40px;\n        display: flex;\n        align-items: center;\n        justify-content: center;\n    }\n    .vd-icon svg { width: 22px; height: 22px; }\n    .vd-content { flex: 1; min-width: 0; }\n    .vd-label {\n        display: block;\n        font-size: 11px;\n        font-weight: 800;\n        letter-spacing: 0.1em;\n        text-transform: uppercase;\n        color: #c0392b;\n        margin-bottom: 8px;\n        font-family: \"Inter\", sans-serif;\n    }\n    .vd-text {\n        font-size: 14px;\n        line-height: 1.6;\n        color: #475467;\n        margin: 0;\n        font-family: \"Inter\", sans-serif;\n    }\n    .vd-text p { margin: 0 0 10px 0; }\n    .vd-text p:last-child { margin-bottom: 0; }\n    .vd-text strong { color: #101828; font-weight: 600; }\n    .vd-text a { color: #c0392b; text-decoration: underline; }\n    @media (max-width: 600px) {\n        .vd-wrap { flex-direction: column; gap: 12px; padding: 20px; }\n        .vd-icon { width: 32px; height: 32px; }\n    }\n    <\/style>\n\n    <div class=\"vd-wrap\" role=\"alert\" aria-label=\"Divulgation des risques\">\n        <div class=\"vd-icon\">\n            <svg viewBox=\"0 0 24 24\" fill=\"none\" xmlns=\"http:\/\/www.w3.org\/2000\/svg\">\n                <path d=\"M12 9V14M12 17.01L12.01 16.998M12 21C16.9706 21 21 16.9706 21 12C21 7.02944 16.9706 3 12 3C7.02944 3 3 7.02944 3 12C3 16.9706 7.02944 21 12 21Z\" stroke=\"#c0392b\" stroke-width=\"2\" stroke-linecap=\"round\" stroke-linejoin=\"round\"\/>\n            <\/svg>\n        <\/div>\n        <div class=\"vd-content\">\n            <span class=\"vd-label\">Avertissement R\u00e9glementaire sur les Risques<\/span>\n            <div class=\"vd-text\"><p>Investir dans des produits financiers comporte des risques. Les pertes peuvent d\u00e9passer la valeur de votre investissement initial.<\/p><\/div>\n        <\/div>\n    <\/div>\n\r\n\r\n\r\n\r\n\r\n<div class=\"wp-block-group volity-quick-answer\" data-volity-quick-answer=\"2026-05-08\" style=\"border-color:#0066cc;border-width:4px;border-radius:8px;padding:20px;background:#f7f9fc;border-left:4px solid #0066cc\"><div class=\"wp-block-group__inner-container is-layout-flow wp-block-group-is-layout-flow\">\r\n\r\n<h2 class=\"wp-block-heading volity-qa-heading\">R\u00e9ponse rapide<\/h2>\r\n\r\n\r\n\r\n<p class=\"wp-block-paragraph\">Les indices synth\u00e9tiques sont des flux de prix simul\u00e9s g\u00e9n\u00e9r\u00e9s par l&rsquo;algorithme d&rsquo;un broker, sans lien avec des paniers d&rsquo;actions r\u00e9els ni des march\u00e9s externes. Ils tradent 24\/7 chez certains brokers offshore et proposent des profils de volatilit\u00e9 fixes (indice Volatilit\u00e9 75, indices Boom and Crash). Le risque de contrepartie est enti\u00e8rement concentr\u00e9 chez le broker, puisqu&rsquo;aucun march\u00e9 externe n&rsquo;existe ; les juridictions r\u00e9gul\u00e9es comme l&rsquo;UE les restreignent ou les interdisent.<\/p>\r\n\r\n<\/div><\/div>\r\n\r\n\r\n<p>Les indices synth\u00e9tiques sont des s\u00e9ries de prix g\u00e9n\u00e9r\u00e9es algorithmiquement et con\u00e7ues pour imiter le comportement statistique des march\u00e9s r\u00e9els (volatilit\u00e9, sauts, action en range) sans r\u00e9f\u00e9rence \u00e0 aucun actif sous-jacent r\u00e9el. Le flux de prix est produit par un g\u00e9n\u00e9rateur de nombres al\u00e9atoires avec v\u00e9rification cryptographique, tourne 24\/7 sans coupures de jours f\u00e9ri\u00e9s, et n&rsquo;est affect\u00e9 ni par les news, ni par les r\u00e9sultats, ni par les d\u00e9cisions des banques centrales. C&rsquo;est un produit d\u00e9riv\u00e9, pas un indice au sens classique.<\/p>\r\n\r\n<h2>Comment les indices synth\u00e9tiques sont construits<\/h2>\r\n<ul>\r\n<li><strong>Indices de volatilit\u00e9<\/strong>. Prix g\u00e9n\u00e9r\u00e9s tick par tick pour maintenir une volatilit\u00e9 annualis\u00e9e constante (en g\u00e9n\u00e9ral 10 %, 25 %, 50 %, 75 %, 100 %).<\/li>\r\n<li><strong>Indices crash et boom<\/strong>. Glissade lente dans une direction avec de rares grands sauts dans la direction oppos\u00e9e. Con\u00e7us pour tester la discipline du stop-loss.<\/li>\r\n<li><strong>Indices step<\/strong>. Pas de probabilit\u00e9 \u00e9gale vers le haut ou le bas, d&rsquo;une taille fixe. Le mod\u00e8le de marche al\u00e9atoire le plus simple.<\/li>\r\n<li><strong>Indices range break<\/strong>. Le prix oscille dans une bande ; en moyenne une fois toutes les N p\u00e9riodes, il casse la bande.<\/li>\r\n<li><strong>Indices jump<\/strong>. Une volatilit\u00e9 de base plus des sauts discrets p\u00e9riodiques de magnitude fixe.<\/li>\r\n<\/ul>\r\n\r\n<h2>Synth\u00e9tiques vs r\u00e9els : les diff\u00e9rences<\/h2>\r\n<ol>\r\n<li><strong>Aucun sous-jacent<\/strong>. Un indice r\u00e9el (S&#038;P 500, FTSE 100, DAX) est un panier d&rsquo;actions cot\u00e9es. Un indice synth\u00e9tique est un flux num\u00e9rique sans r\u00e9f\u00e9rent \u00e9conomique.<\/li>\r\n<li><strong>Trading 24\/7<\/strong>. Pas d&rsquo;ouverture, pas de cl\u00f4ture, pas de gap de week-end.<\/li>\r\n<li><strong>Pas de moteurs fondamentaux<\/strong>. R\u00e9sultats, PIB, d\u00e9cisions de taux : ils bougent les indices r\u00e9els. Pas les synth\u00e9tiques.<\/li>\r\n<li><strong>Propri\u00e9t\u00e9s statistiques constantes<\/strong>. Un indice de volatilit\u00e9 synth\u00e9tique est con\u00e7u pour maintenir son r\u00e9gime de volatilit\u00e9. Un indice r\u00e9el d\u00e9rive entre r\u00e9gimes.<\/li>\r\n<li><strong>Mod\u00e8le de contrepartie<\/strong>. Le flux de prix est fourni par le broker ou un RNG tiers. Le trader prend le risque sur l&rsquo;int\u00e9grit\u00e9 du flux.<\/li>\r\n<\/ol>\r\n\r\n<h2>\u00c0 quoi servent les indices synth\u00e9tiques<\/h2>\r\n<ul>\r\n<li><strong>Stress-test de strat\u00e9gie<\/strong>. Une strat\u00e9gie de scalping peut \u00eatre backtest\u00e9e contre un flux de prix continu et au r\u00e9gime stable.<\/li>\r\n<li><strong>Trading hors heures<\/strong>. Quand les march\u00e9s r\u00e9els sont ferm\u00e9s, les indices synth\u00e9tiques restent liquides.<\/li>\r\n<li><strong>Positions immunis\u00e9es contre les news<\/strong>. Un trader qui veut une exposition purement technique sans chocs fondamentaux.<\/li>\r\n<li><strong>P\u00e9dagogie<\/strong>. Les d\u00e9butants apprennent les types d&rsquo;ordres, le sizing et le placement des stops sans contexte macro \u00e0 m\u00e9moriser.<\/li>\r\n<\/ul>\r\n\r\n<h2>Quand le trading d&rsquo;indices synth\u00e9tiques a-t-il du sens ?<\/h2>\r\n<ul>\r\n<li><strong>Vous avez une strat\u00e9gie technique qui a besoin d&rsquo;un environnement de test propre<\/strong>.<\/li>\r\n<li><strong>Vous tradez en dehors des heures de march\u00e9 habituelles<\/strong> et cherchez une alternative liquide et r\u00e9gul\u00e9e au forex overnight t\u00e9nu.<\/li>\r\n<li><strong>Vous vous entra\u00eenez<\/strong> \u00e0 la gestion des ordres sans le bruit des publications macro.<\/li>\r\n<li><strong>Vous comprenez que le produit est un contrat sur un flux num\u00e9rique g\u00e9n\u00e9r\u00e9<\/strong>, pas sur un panier d&rsquo;actions.<\/li>\r\n<\/ul>\r\n\r\n<h2>Ce qui peut mal tourner<\/h2>\r\n<ul>\r\n<li><strong>Confusion avec les indices r\u00e9els<\/strong>. Traiter le Synthetic Volatility 75 comme le S&#038;P 500. Les instruments se comportent diff\u00e9remment et les cadres d&rsquo;analyse ne se transf\u00e8rent pas un pour un.<\/li>\r\n<li><strong>Projection de motifs<\/strong>. Un trader voit une t\u00eate-\u00e9paules sur un flux synth\u00e9tique. La figure n&rsquo;a aucun sens fondamental. L&rsquo;edge probabiliste doit \u00eatre test\u00e9, pas suppos\u00e9.<\/li>\r\n<li><strong>Explosions sur crash-and-boom<\/strong>. Vendre les indices crash \u00e0 chaque glissade haussi\u00e8re para\u00eet rentable jusqu&rsquo;au saut in\u00e9vitable qui efface six mois de gains en un tick.<\/li>\r\n<li><strong>Disponibilit\u00e9 r\u00e9glementaire<\/strong>. Les indices synth\u00e9tiques sont restreints dans certaines juridictions, dont des parties de l&rsquo;UE. V\u00e9rifiez toujours que le produit est disponible aux clients retail dans votre pays avant d&rsquo;ouvrir une position.<\/li>\r\n<\/ul>\r\n\r\n<h2>Les indices chez Volity<\/h2>\r\n<p>Volity propose une exposition CFD aux principaux indices actions r\u00e9els : S&#038;P 500, Nasdaq 100, Dow Jones, FTSE 100, DAX, CAC 40, Nikkei 225 et Hang Seng. Le trading est ex\u00e9cut\u00e9 par UBK Markets Ltd, une Cyprus Investment Firm autoris\u00e9e par la CySEC sous la licence 186\/12. Le levier retail sur les indices majeurs est plafonn\u00e9 \u00e0 1:20 au titre des mesures d&rsquo;intervention produit de l&rsquo;ESMA. La protection contre le solde n\u00e9gatif s&rsquo;applique. Les clients retail \u00e9ligibles sont couverts par le Cyprus Investor Compensation Fund jusqu&rsquo;\u00e0 20 000 EUR par client et par firme.<\/p>\r\n\r\n\r\n\r\n<hr class=\"wp-block-separator has-alpha-channel-opacity\"\/>\r\n\r\n\r\n\r\n<div class=\"wp-block-group volity-authority-footer\" data-volity-authority=\"seo-2026-05-08-custom\"><div class=\"wp-block-group__inner-container is-layout-flow wp-block-group-is-layout-flow\">\r\n\r\n<h3 class=\"wp-block-heading\">Sources v\u00e9rifi\u00e9es<\/h3>\r\n\r\n\r\n\r\n<ul class=\"wp-block-list\"><li><a href=\"https:\/\/www.esma.europa.eu\/\" rel=\"noopener\" target=\"_blank\">R\u00e8gles ESMA sur les produits retail<\/a><\/li><li><a href=\"https:\/\/www.cysec.gov.cy\/en-GB\/entities\/investment-firms\/\" rel=\"noopener\" target=\"_blank\">Registre CySEC des firmes d&rsquo;investissement<\/a><\/li><li><a href=\"https:\/\/www.fca.org.uk\/consumers\" rel=\"noopener\" target=\"_blank\">Conseils consommateurs FCA<\/a><\/li><\/ul>\r\n\r\n\r\n\r\n<h3 class=\"wp-block-heading\">\u00c0 lire aussi sur Volity<\/h3>\r\n\r\n\r\n\r\n<ul class=\"wp-block-list\"><li><a href=\"https:\/\/volity.io\/fr\/trading-platforms-fr\/indices-trading\/\">Qu&rsquo;est-ce que le trading d&rsquo;indices<\/a><\/li><li><a href=\"https:\/\/volity.io\/cfd\/cfd-index-trading\/\">Trading CFD indices : S&#038;P 500, NASDAQ, DAX, FTSE<\/a><\/li><li><a href=\"https:\/\/volity.io\/fr\/actions\/best-index-trading-strategies\/\">Meilleures strat\u00e9gies sur indices<\/a><\/li><li><a href=\"https:\/\/volity.io\/cfd\/what-is-cfd-trading\/\">Qu&rsquo;est-ce que le trading CFD ? Guide complet 2026<\/a><\/li><li><a href=\"https:\/\/volity.io\/fr\/glossaire\/what-is-leverage-in-forex\/\">Qu&rsquo;est-ce que le levier sur le forex<\/a><\/li><\/ul>\r\n\r\n\r\n\r\n<p class=\"volity-last-reviewed wp-block-paragraph\" style=\"font-size:13px;color:#5a6577;margin-top:18px\"><em>Derni\u00e8re r\u00e9vision : 2026-05-08 par Alexander Bennett, analyste financier principal chez Volity. Nous mettons \u00e0 jour cet article d\u00e8s que les donn\u00e9es de march\u00e9, le cadre r\u00e9glementaire ou les fonctionnalit\u00e9s de la plateforme \u00e9voluent.<\/em><\/p>\r\n\r\n<\/div><\/div>\r\n\n\n\n    <style>\n    .volity-coi {\n        background: #fff;\n        border: 1px solid #c5d8ee;\n        border-radius: 8px;\n        margin: 32px 0;\n        font-family: \"Inter\", sans-serif;\n        font-size: 13.5px;\n        line-height: 1.75;\n        color: #4a4a4a;\n        box-sizing: border-box;\n        width: 100%;\n        overflow: hidden;\n    }\n    .volity-coi .coi-heading {\n        display: block;\n        background: #2c6fad;\n        color: #fff;\n        font-size: 11px;\n        font-weight: 700;\n        letter-spacing: 0.09em;\n        text-transform: uppercase;\n        padding: 9px 22px;\n        margin: 0;\n    }\n    .volity-coi .coi-body { padding: 16px 22px; }\n    .volity-coi .coi-body p { margin: 0 0 10px 0; }\n    .volity-coi .coi-body p:last-child { margin-bottom: 0; }\n    .volity-coi a { color: #2c6fad; text-decoration: underline; }\n    @media(max-width:480px) {\n        .volity-coi .coi-body { padding: 14px 16px; font-size: 13px; }\n        .volity-coi .coi-heading { padding: 8px 16px; }\n    }\n    <\/style>\n    <div class=\"volity-coi\" role=\"note\">\n        <span class=\"coi-heading\">\u24d8 Divulgation<\/span>\n        <div class=\"coi-body\"><p>Volity exploite une plateforme de trading et publie \u00e9galement du contenu \u00e9ducatif et analytique sur le trading. Le contenu de cette page est uniquement \u00e0 des fins \u00e9ducatives et ne doit pas \u00eatre consid\u00e9r\u00e9 comme un conseil financier. Volity peut b\u00e9n\u00e9ficier commercialement lorsque les lecteurs ouvrent des comptes de trading via les liens pr\u00e9sents sur ce site.<\/p><p>Notre contenu est produit et r\u00e9vis\u00e9 selon des <a href=\"https:\/\/volity.io\/fr\/editorial-standards\/\">standards \u00e9ditoriaux<\/a> document\u00e9s ; la m\u00e9thodologie de comparaison et de revue est publi\u00e9e <a href=\"https:\/\/volity.io\/fr\/editorial-standards\/review-methodology\/\">ici<\/a>.<\/p><\/div>\n    <\/div>\n\n","protected":false},"excerpt":{"rendered":"<p>R\u00e9ponse rapide Les indices synth\u00e9tiques sont des flux de prix simul\u00e9s g\u00e9n\u00e9r\u00e9s par l&rsquo;algorithme d&rsquo;un broker, sans lien avec des paniers d&rsquo;actions [&hellip;]<\/p>\n","protected":false},"author":2,"featured_media":28687,"comment_status":"closed","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"inline_featured_image":false,"custom_schema":"","footnotes":""},"categories":[212],"tags":[],"class_list":["post-34602","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-actions"],"yoast_head":"<!-- This site is optimized with the Yoast SEO Premium plugin v27.7 (Yoast SEO v27.7) - https:\/\/yoast.com\/product\/yoast-seo-premium-wordpress\/ -->\n<title>Que sont les indices synth\u00e9tiques ? 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M\u00e9canique, brokers, risques de contrepartie.\" \/>\n<meta property=\"og:url\" content=\"https:\/\/volity.io\/fr\/actions\/what-are-synthetic-indices\/\" \/>\n<meta property=\"og:site_name\" content=\"Volity\" \/>\n<meta property=\"article:publisher\" content=\"https:\/\/www.facebook.com\/profile.php?id=61570055360264\" \/>\n<meta property=\"article:published_time\" content=\"2026-05-07T21:59:11+00:00\" \/>\n<meta property=\"article:modified_time\" content=\"2026-05-19T17:52:42+00:00\" \/>\n<meta property=\"og:image\" content=\"https:\/\/volity.io\/wp-content\/uploads\/2026\/05\/what-are-synthetic-indices.webp\" \/>\n\t<meta property=\"og:image:width\" content=\"1024\" \/>\n\t<meta property=\"og:image:height\" content=\"572\" \/>\n\t<meta property=\"og:image:type\" content=\"image\/webp\" \/>\n<meta name=\"author\" content=\"Alexander Bennett\" \/>\n<meta name=\"twitter:card\" content=\"summary_large_image\" \/>\n<meta name=\"twitter:creator\" content=\"@VolityBeat\" \/>\n<meta name=\"twitter:site\" content=\"@VolityBeat\" \/>\n<meta name=\"twitter:label1\" content=\"\u00c9crit par\" \/>\n\t<meta name=\"twitter:data1\" content=\"Alexander Bennett\" \/>\n\t<meta name=\"twitter:label2\" content=\"Dur\u00e9e de lecture estim\u00e9e\" \/>\n\t<meta name=\"twitter:data2\" content=\"5 minutes\" \/>\n<script type=\"application\/ld+json\" class=\"yoast-schema-graph\">{\"@context\":\"https:\\\/\\\/schema.org\",\"@graph\":[{\"@type\":\"Article\",\"@id\":\"https:\\\/\\\/volity.io\\\/fr\\\/actions\\\/what-are-synthetic-indices\\\/#article\",\"isPartOf\":{\"@id\":\"https:\\\/\\\/volity.io\\\/fr\\\/actions\\\/what-are-synthetic-indices\\\/\"},\"author\":{\"name\":\"Alexander Bennett\",\"@id\":\"https:\\\/\\\/volity.io\\\/fr\\\/#\\\/schema\\\/person\\\/b331ae22e808d4e5c67047ab75976841\"},\"headline\":\"Que sont les indices synth\u00e9tiques ?\",\"datePublished\":\"2026-05-07T21:59:11+00:00\",\"dateModified\":\"2026-05-19T17:52:42+00:00\",\"mainEntityOfPage\":{\"@id\":\"https:\\\/\\\/volity.io\\\/fr\\\/actions\\\/what-are-synthetic-indices\\\/\"},\"wordCount\":947,\"publisher\":{\"@id\":\"https:\\\/\\\/volity.io\\\/fr\\\/#organization\"},\"image\":{\"@id\":\"https:\\\/\\\/volity.io\\\/fr\\\/actions\\\/what-are-synthetic-indices\\\/#primaryimage\"},\"thumbnailUrl\":\"https:\\\/\\\/volity.io\\\/wp-content\\\/uploads\\\/2026\\\/05\\\/what-are-synthetic-indices.webp\",\"articleSection\":[\"Actions\"],\"inLanguage\":\"fr-FR\",\"speakable\":{\"@type\":\"SpeakableSpecification\",\"cssSelector\":[\"h1\",\".entry-content > p:first-of-type\",\".entry-content h2\",\".faq-question\",\"[data-volity-takeaways]\"]}},{\"@type\":\"WebPage\",\"@id\":\"https:\\\/\\\/volity.io\\\/fr\\\/actions\\\/what-are-synthetic-indices\\\/\",\"url\":\"https:\\\/\\\/volity.io\\\/fr\\\/actions\\\/what-are-synthetic-indices\\\/\",\"name\":\"Que sont les indices synth\u00e9tiques ? 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