{"id":15097,"date":"2025-11-11T12:32:00","date_gmt":"2025-11-11T11:32:00","guid":{"rendered":"https:\/\/www.blog.bim.finance\/?p=15097"},"modified":"2025-11-11T10:43:43","modified_gmt":"2025-11-11T09:43:43","slug":"polymarket-wash-trading-volume","status":"publish","type":"post","link":"https:\/\/www.blog.bim.finance\/en\/polymarket-wash-trading-volume\/","title":{"rendered":"Polymarket : 25% du volume serait du wash trading"},"content":{"rendered":"<div data-elementor-type=\"wp-post\" data-elementor-id=\"15097\" class=\"elementor elementor-15097\" data-elementor-post-type=\"post\">\n\t\t\t\t\t\t<section class=\"elementor-section elementor-top-section elementor-element elementor-element-fd98414 elementor-section-boxed elementor-section-height-default elementor-section-height-default\" data-id=\"fd98414\" data-element_type=\"section\" data-e-type=\"section\">\n\t\t\t\t\t\t<div class=\"elementor-container elementor-column-gap-default\">\n\t\t\t\t\t<div class=\"elementor-column elementor-col-100 elementor-top-column elementor-element elementor-element-ee5f6e7\" data-id=\"ee5f6e7\" data-element_type=\"column\" data-e-type=\"column\">\n\t\t\t<div class=\"elementor-widget-wrap elementor-element-populated\">\n\t\t\t\t\t\t<div class=\"elementor-element elementor-element-fa8d03e elementor-widget elementor-widget-heading\" data-id=\"fa8d03e\" data-element_type=\"widget\" data-e-type=\"widget\" data-widget_type=\"heading.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t\t\t<h2 class=\"elementor-heading-title elementor-size-default\">Mise en contexte<\/h2>\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t\t<\/div>\n\t\t<\/div>\n\t\t\t\t\t<\/div>\n\t\t<\/section>\n\t\t\t\t<section class=\"elementor-section elementor-top-section elementor-element elementor-element-44dbc6b elementor-section-boxed elementor-section-height-default elementor-section-height-default\" data-id=\"44dbc6b\" data-element_type=\"section\" data-e-type=\"section\">\n\t\t\t\t\t\t<div class=\"elementor-container elementor-column-gap-default\">\n\t\t\t\t\t<div class=\"elementor-column elementor-col-100 elementor-top-column elementor-element elementor-element-5fc35bc\" data-id=\"5fc35bc\" data-element_type=\"column\" data-e-type=\"column\">\n\t\t\t<div class=\"elementor-widget-wrap elementor-element-populated\">\n\t\t\t\t\t\t<div class=\"elementor-element elementor-element-727c5a9 elementor-widget elementor-widget-text-editor\" data-id=\"727c5a9\" data-element_type=\"widget\" data-e-type=\"widget\" data-widget_type=\"text-editor.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t\t\t\t\t\t\t<p class=\"p1\">Des chercheurs de Columbia University jette une ombre sur <a href=\"https:\/\/www.blog.bim.finance\/en\/polymarket-marche-predictif\/\">Polymarket<\/a>, la plus grande plateforme de march\u00e9s de pr\u00e9diction d\u00e9centralis\u00e9e. L&rsquo;analyse de plus de deux ans de donn\u00e9es on-chain r\u00e9v\u00e8le qu&rsquo;environ 25% du volume de trading historique de la plateforme proviendrait de wash trading. Il s&rsquo;agit d&rsquo;une pratique o\u00f9 des utilisateurs ach\u00e8tent et revendent rapidement les m\u00eames contrats, souvent \u00e0 eux-m\u00eames ou via des comptes coordonn\u00e9s, sans prendre de r\u00e9elle position de march\u00e9. Cette manipulation artificielle a vari\u00e9 consid\u00e9rablement dans le temps. Elle a atteint un pic alarmant \u00e0 pr\u00e8s de 60% du volume hebdomadaire en d\u00e9cembre 2024 avant de redescendre \u00e0 environ 5% en mai 2025, puis de remonter \u00e0 20% d\u00e9but octobre. Les march\u00e9s li\u00e9s aux \u00e9lections et aux sports ont \u00e9t\u00e9 les plus touch\u00e9s, avec certaines semaines affichant plus de 90% de transactions suspectes.<\/p>\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t\t<\/div>\n\t\t<\/div>\n\t\t\t\t\t<\/div>\n\t\t<\/section>\n\t\t\t\t<section class=\"elementor-section elementor-top-section elementor-element elementor-element-317f553 elementor-section-boxed elementor-section-height-default elementor-section-height-default\" data-id=\"317f553\" data-element_type=\"section\" data-e-type=\"section\">\n\t\t\t\t\t\t<div class=\"elementor-container elementor-column-gap-default\">\n\t\t\t\t\t<div class=\"elementor-column elementor-col-100 elementor-top-column elementor-element elementor-element-921e948\" data-id=\"921e948\" data-element_type=\"column\" data-e-type=\"column\">\n\t\t\t<div class=\"elementor-widget-wrap elementor-element-populated\">\n\t\t\t\t\t\t<div class=\"elementor-element elementor-element-dd63c40 elementor-widget elementor-widget-image\" data-id=\"dd63c40\" data-element_type=\"widget\" data-e-type=\"widget\" data-widget_type=\"image.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t\t\t\t\t\t\t\t\t\t<figure class=\"wp-caption\">\n\t\t\t\t\t\t\t\t\t\t<img data-recalc-dims=\"1\" decoding=\"async\" src=\"https:\/\/i0.wp.com\/www.reuters.com\/resizer\/v2\/EHINYKFB2FJO7K3WIKYDYY6ANU.jpg?w=800&#038;ssl=1\" title=\"\" alt=\"L&#039;universit\u00e9 de Columbia mettent en avant des irr\u00e9gularit\u00e9s du volume de Polymarket\" loading=\"lazy\" \/>\t\t\t\t\t\t\t\t\t\t\t<figcaption class=\"widget-image-caption wp-caption-text\">L'universit\u00e9 de Columbia met en avant des irr\u00e9gularit\u00e9s du volume de Polymarket<\/figcaption>\n\t\t\t\t\t\t\t\t\t\t<\/figure>\n\t\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t\t<\/div>\n\t\t<\/div>\n\t\t\t\t\t<\/div>\n\t\t<\/section>\n\t\t\t\t<section class=\"elementor-section elementor-top-section elementor-element elementor-element-0f6ce0f elementor-section-boxed elementor-section-height-default elementor-section-height-default\" data-id=\"0f6ce0f\" data-element_type=\"section\" data-e-type=\"section\">\n\t\t\t\t\t\t<div class=\"elementor-container elementor-column-gap-default\">\n\t\t\t\t\t<div class=\"elementor-column elementor-col-100 elementor-top-column elementor-element elementor-element-056a3ac\" data-id=\"056a3ac\" data-element_type=\"column\" data-e-type=\"column\">\n\t\t\t<div class=\"elementor-widget-wrap elementor-element-populated\">\n\t\t\t\t\t\t<div class=\"elementor-element elementor-element-3c8fd27 elementor-widget elementor-widget-text-editor\" data-id=\"3c8fd27\" data-element_type=\"widget\" data-e-type=\"widget\" data-widget_type=\"text-editor.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t\t\t\t\t\t\t<p>Les quatre co-auteurs de l&rsquo;\u00e9tude, dont les professeurs Yash Kanoria et Hongyao Ma de Columbia Business School, Rajiv Sethi de Barnard College et le doctorant Allen Sirolly, ont d\u00e9velopp\u00e9 un algorithme d\u00e9tectant ces comportements en analysant la fr\u00e9quence des positions ouvertes puis imm\u00e9diatement ferm\u00e9es, particuli\u00e8rement entre wallets pr\u00e9sentant les m\u00eames patterns. L&rsquo;\u00e9quipe a identifi\u00e9 des r\u00e9seaux complexes incluant un cluster de plus de 43 000 portefeuilles g\u00e9n\u00e9rant pr\u00e8s d&rsquo;un million de dollars de volume. Principalement \u00e0 des prix inf\u00e9rieurs \u00e0 un centime, presque enti\u00e8rement flaggu\u00e9s comme wash trading.<\/p>\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t\t<\/div>\n\t\t<\/div>\n\t\t\t\t\t<\/div>\n\t\t<\/section>\n\t\t\t\t<section class=\"elementor-section elementor-top-section elementor-element elementor-element-c5c6114 elementor-section-boxed elementor-section-height-default elementor-section-height-default\" data-id=\"c5c6114\" data-element_type=\"section\" data-e-type=\"section\">\n\t\t\t\t\t\t<div class=\"elementor-container elementor-column-gap-default\">\n\t\t\t\t\t<div class=\"elementor-column elementor-col-100 elementor-top-column elementor-element elementor-element-950dc94\" data-id=\"950dc94\" data-element_type=\"column\" data-e-type=\"column\">\n\t\t\t<div class=\"elementor-widget-wrap elementor-element-populated\">\n\t\t\t\t\t\t<div class=\"elementor-element elementor-element-4803469 elementor-widget elementor-widget-heading\" data-id=\"4803469\" data-element_type=\"widget\" data-e-type=\"widget\" data-widget_type=\"heading.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t\t\t<h2 class=\"elementor-heading-title elementor-size-default\">Les m\u00e9canismes structurels qui facilitent la manipulation<\/h2>\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t\t<\/div>\n\t\t<\/div>\n\t\t\t\t\t<\/div>\n\t\t<\/section>\n\t\t\t\t<section class=\"elementor-section elementor-top-section elementor-element elementor-element-ab7d13f elementor-section-boxed elementor-section-height-default elementor-section-height-default\" data-id=\"ab7d13f\" data-element_type=\"section\" data-e-type=\"section\">\n\t\t\t\t\t\t<div class=\"elementor-container elementor-column-gap-default\">\n\t\t\t\t\t<div class=\"elementor-column elementor-col-100 elementor-top-column elementor-element elementor-element-6b9a13f\" data-id=\"6b9a13f\" data-element_type=\"column\" data-e-type=\"column\">\n\t\t\t<div class=\"elementor-widget-wrap elementor-element-populated\">\n\t\t\t\t\t\t<div class=\"elementor-element elementor-element-8eb66b5 elementor-widget elementor-widget-text-editor\" data-id=\"8eb66b5\" data-element_type=\"widget\" data-e-type=\"widget\" data-widget_type=\"text-editor.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t\t\t\t\t\t\t<p class=\"p1\">L&rsquo;\u00e9tude pointe plusieurs caract\u00e9ristiques de Polymarket qui rendent la plateforme particuli\u00e8rement vuln\u00e9rable au wash trading. Premi\u00e8rement, l&rsquo;absence totale de frais de transaction permet aux traders de multiplier les allers-retours sans co\u00fbt. Deuxi\u00e8mement, la plateforme ne requiert aucune v\u00e9rification d&rsquo;identit\u00e9 KYC, permettant \u00e0 un seul individu de cr\u00e9er et contr\u00f4ler des dizaines voire des milliers de wallets pseudonymes. Troisi\u00e8mement, l&rsquo;utilisation du stablecoin USDC facilite le recyclage rapide du capital entre multiples comptes. Les chercheurs ont observ\u00e9 des cas o\u00f9 des traders passaient des contrats \u00e0 travers des dizaines de portefeuilles en succession rapide, parfois en acceptant d\u00e9lib\u00e9r\u00e9ment des positions perdantes pour cr\u00e9er l&rsquo;apparence de transactions l\u00e9gitimes.<\/p>\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t\t<\/div>\n\t\t<\/div>\n\t\t\t\t\t<\/div>\n\t\t<\/section>\n\t\t\t\t<section class=\"elementor-section elementor-top-section elementor-element elementor-element-ab51c75 elementor-section-boxed elementor-section-height-default elementor-section-height-default\" data-id=\"ab51c75\" data-element_type=\"section\" data-e-type=\"section\">\n\t\t\t\t\t\t<div class=\"elementor-container elementor-column-gap-default\">\n\t\t\t\t\t<div class=\"elementor-column elementor-col-100 elementor-top-column elementor-element elementor-element-668779c\" data-id=\"668779c\" data-element_type=\"column\" data-e-type=\"column\">\n\t\t\t<div class=\"elementor-widget-wrap elementor-element-populated\">\n\t\t\t\t\t\t<div class=\"elementor-element elementor-element-6254728 elementor-widget elementor-widget-image\" data-id=\"6254728\" data-element_type=\"widget\" data-e-type=\"widget\" data-widget_type=\"image.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t\t\t\t\t\t\t\t\t\t<figure class=\"wp-caption\">\n\t\t\t\t\t\t\t\t\t\t<img fetchpriority=\"high\" decoding=\"async\" width=\"800\" height=\"515\" src=\"https:\/\/i0.wp.com\/www.blog.bim.finance\/wp-content\/uploads\/2024\/11\/Polymarket-Bitcoin-100k.png?fit=800%2C515&amp;ssl=1\" class=\"attachment-large size-large wp-image-10433\" alt=\"Polymarket pr\u00e9diction Bitcoin 100k\" srcset=\"https:\/\/i0.wp.com\/www.blog.bim.finance\/wp-content\/uploads\/2024\/11\/Polymarket-Bitcoin-100k.png?w=819&amp;ssl=1 819w, https:\/\/i0.wp.com\/www.blog.bim.finance\/wp-content\/uploads\/2024\/11\/Polymarket-Bitcoin-100k.png?resize=300%2C193&amp;ssl=1 300w, https:\/\/i0.wp.com\/www.blog.bim.finance\/wp-content\/uploads\/2024\/11\/Polymarket-Bitcoin-100k.png?resize=768%2C494&amp;ssl=1 768w\" sizes=\"(max-width: 800px) 100vw, 800px\" \/>\t\t\t\t\t\t\t\t\t\t\t<figcaption class=\"widget-image-caption wp-caption-text\">Polymarket pr\u00e9diction Bitcoin 100k<\/figcaption>\n\t\t\t\t\t\t\t\t\t\t<\/figure>\n\t\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t\t<\/div>\n\t\t<\/div>\n\t\t\t\t\t<\/div>\n\t\t<\/section>\n\t\t\t\t<section class=\"elementor-section elementor-top-section elementor-element elementor-element-bab4364 elementor-section-boxed elementor-section-height-default elementor-section-height-default\" data-id=\"bab4364\" data-element_type=\"section\" data-e-type=\"section\">\n\t\t\t\t\t\t<div class=\"elementor-container elementor-column-gap-default\">\n\t\t\t\t\t<div class=\"elementor-column elementor-col-100 elementor-top-column elementor-element elementor-element-15a8dd7\" data-id=\"15a8dd7\" data-element_type=\"column\" data-e-type=\"column\">\n\t\t\t<div class=\"elementor-widget-wrap elementor-element-populated\">\n\t\t\t\t\t\t<div class=\"elementor-element elementor-element-c4845b6 elementor-widget elementor-widget-text-editor\" data-id=\"c4845b6\" data-element_type=\"widget\" data-e-type=\"widget\" data-widget_type=\"text-editor.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t\t\t\t\t\t\t<p>Malgr\u00e9 cette activit\u00e9 intense, la plupart des wallets suspects n&rsquo;ont g\u00e9n\u00e9r\u00e9 aucun profit r\u00e9el. Cela sugg\u00e8re que l&rsquo;objectif n&rsquo;\u00e9tait pas financier mais visant plut\u00f4t \u00e0 maximiser les chances d&rsquo;obtenir des r\u00e9compenses futures. Le fondateur de Polymarket, Shayne Coplan, a en effet \u00e9voqu\u00e9 \u00e0 plusieurs reprises la possibilit\u00e9 d&rsquo;un airdrop de token POLY. Les pics de wash trading correspondent souvent aux rumeurs concernant ce token potentiel plut\u00f4t qu&rsquo;aux actualit\u00e9s des \u00e9v\u00e9nements sous-jacents. Cette dynamique cr\u00e9e une incitation perverse o\u00f9 les utilisateurs manipulent artificiellement leur volume pour se positionner favorablement lors d&rsquo;une future distribution de tokens.<\/p>\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t\t<\/div>\n\t\t<\/div>\n\t\t\t\t\t<\/div>\n\t\t<\/section>\n\t\t\t\t<section class=\"elementor-section elementor-top-section elementor-element elementor-element-1aa0657 elementor-section-boxed elementor-section-height-default elementor-section-height-default\" data-id=\"1aa0657\" data-element_type=\"section\" data-e-type=\"section\">\n\t\t\t\t\t\t<div class=\"elementor-container elementor-column-gap-default\">\n\t\t\t\t\t<div class=\"elementor-column elementor-col-100 elementor-top-column elementor-element elementor-element-05370fb\" data-id=\"05370fb\" data-element_type=\"column\" data-e-type=\"column\">\n\t\t\t<div class=\"elementor-widget-wrap elementor-element-populated\">\n\t\t\t\t\t\t<div class=\"elementor-element elementor-element-444f9d2 elementor-widget elementor-widget-heading\" data-id=\"444f9d2\" data-element_type=\"widget\" data-e-type=\"widget\" data-widget_type=\"heading.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t\t\t<h2 class=\"elementor-heading-title elementor-size-default\">La cr\u00e9dibilit\u00e9 des march\u00e9s de pr\u00e9diction remise en question<\/h2>\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t\t<\/div>\n\t\t<\/div>\n\t\t\t\t\t<\/div>\n\t\t<\/section>\n\t\t\t\t<section class=\"elementor-section elementor-top-section elementor-element elementor-element-bc89265 elementor-section-boxed elementor-section-height-default elementor-section-height-default\" data-id=\"bc89265\" data-element_type=\"section\" data-e-type=\"section\">\n\t\t\t\t\t\t<div class=\"elementor-container elementor-column-gap-default\">\n\t\t\t\t\t<div class=\"elementor-column elementor-col-100 elementor-top-column elementor-element elementor-element-5bcce54\" data-id=\"5bcce54\" data-element_type=\"column\" data-e-type=\"column\">\n\t\t\t<div class=\"elementor-widget-wrap elementor-element-populated\">\n\t\t\t\t\t\t<div class=\"elementor-element elementor-element-3024595 elementor-widget elementor-widget-text-editor\" data-id=\"3024595\" data-element_type=\"widget\" data-e-type=\"widget\" data-widget_type=\"text-editor.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t\t\t\t\t\t\t<p class=\"p1\">Cette r\u00e9v\u00e9lation intervient \u00e0 un moment critique pour Polymarket qui vient de recevoir un investissement massif de 2 milliards de dollars d&rsquo;Intercontinental Exchange, propri\u00e9taire du NYSE, valorisant la plateforme \u00e0 environ 8 milliards. La soci\u00e9t\u00e9 serait \u00e9galement en discussions pour lever des fonds suppl\u00e9mentaires \u00e0 une valorisation de 12 \u00e0 15 milliards. Ces chiffres reposent en partie sur les volumes de trading impressionnants affich\u00e9s par la plateforme. Si un quart de ce volume est artificiel, cela remet en question la l\u00e9gitimit\u00e9 de ces valorisations astronomiques. Par ailleurs, Polymarket pr\u00e9pare son retour officiel sur le march\u00e9 am\u00e9ricain apr\u00e8s avoir acquis l&rsquo;exchange r\u00e9gul\u00e9 QCEX pour 112 millions de dollars, suite \u00e0 la cl\u00f4ture en juillet 2025 des investigations du Department of Justice et de la CFTC.<\/p>\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t\t<\/div>\n\t\t<\/div>\n\t\t\t\t\t<\/div>\n\t\t<\/section>\n\t\t\t\t<section class=\"elementor-section elementor-top-section elementor-element elementor-element-a75fe4c elementor-section-boxed elementor-section-height-default elementor-section-height-default\" data-id=\"a75fe4c\" data-element_type=\"section\" data-e-type=\"section\">\n\t\t\t\t\t\t<div class=\"elementor-container elementor-column-gap-default\">\n\t\t\t\t\t<div class=\"elementor-column elementor-col-100 elementor-top-column elementor-element elementor-element-d2a7825\" data-id=\"d2a7825\" data-element_type=\"column\" data-e-type=\"column\">\n\t\t\t<div class=\"elementor-widget-wrap elementor-element-populated\">\n\t\t\t\t\t\t<div class=\"elementor-element elementor-element-903ffb7 elementor-widget elementor-widget-image\" data-id=\"903ffb7\" data-element_type=\"widget\" data-e-type=\"widget\" data-widget_type=\"image.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t\t\t\t\t\t\t\t\t\t<figure class=\"wp-caption\">\n\t\t\t\t\t\t\t\t\t\t<img data-recalc-dims=\"1\" decoding=\"async\" src=\"https:\/\/i0.wp.com\/www.reuters.com\/resizer\/v2\/WB2EZAACNNJZXIGNFN5OGSFB2Q.jpg?w=800&#038;ssl=1\" title=\"\" alt=\"Polymarket re\u00e7oit un signal vert de la CFTC - Reuters\" loading=\"lazy\" \/>\t\t\t\t\t\t\t\t\t\t\t<figcaption class=\"widget-image-caption wp-caption-text\">Polymarket re\u00e7oit un signal vert de la CFTC - Reuters<\/figcaption>\n\t\t\t\t\t\t\t\t\t\t<\/figure>\n\t\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t\t<\/div>\n\t\t<\/div>\n\t\t\t\t\t<\/div>\n\t\t<\/section>\n\t\t\t\t<section class=\"elementor-section elementor-top-section elementor-element elementor-element-8183268 elementor-section-boxed elementor-section-height-default elementor-section-height-default\" data-id=\"8183268\" data-element_type=\"section\" data-e-type=\"section\">\n\t\t\t\t\t\t<div class=\"elementor-container elementor-column-gap-default\">\n\t\t\t\t\t<div class=\"elementor-column elementor-col-100 elementor-top-column elementor-element elementor-element-218e9a6\" data-id=\"218e9a6\" data-element_type=\"column\" data-e-type=\"column\">\n\t\t\t<div class=\"elementor-widget-wrap elementor-element-populated\">\n\t\t\t\t\t\t<div class=\"elementor-element elementor-element-3f2220b elementor-widget elementor-widget-text-editor\" data-id=\"3f2220b\" data-element_type=\"widget\" data-e-type=\"widget\" data-widget_type=\"text-editor.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t\t\t\t\t\t\t<p>Les chercheurs de Columbia soulignent que le wash trading ne rajoute ni liquidit\u00e9 ni information au march\u00e9, ce qui sape la promesse fondamentale des march\u00e9s de pr\u00e9diction : refl\u00e9ter la sagesse collective de participants r\u00e9els. Yash Kanoria exprime l&rsquo;espoir que Polymarket accueillera positivement ces conclusions et distinguera d\u00e9sormais le volume authentique du fictif. Cependant, la plateforme n&rsquo;a fourni aucun commentaire au moment de la publication de l&rsquo;\u00e9tude. Cette absence de r\u00e9action contraste avec l&rsquo;urgence du probl\u00e8me, d&rsquo;autant que le wash trading constitue une forme de manipulation de march\u00e9 ill\u00e9gale dans les syst\u00e8mes financiers traditionnels. Une \u00e9tude de 2022 avait d\u00e9j\u00e0 r\u00e9v\u00e9l\u00e9 que 70% du volume sur les exchanges crypto non r\u00e9gul\u00e9s provenait de wash trading, alt\u00e9rant drastiquement les classements des plateformes.<\/p>\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t\t<\/div>\n\t\t<\/div>\n\t\t\t\t\t<\/div>\n\t\t<\/section>\n\t\t\t\t<section class=\"elementor-section elementor-top-section elementor-element elementor-element-56b69a5 elementor-section-boxed elementor-section-height-default elementor-section-height-default\" data-id=\"56b69a5\" data-element_type=\"section\" data-e-type=\"section\">\n\t\t\t\t\t\t<div class=\"elementor-container elementor-column-gap-default\">\n\t\t\t\t\t<div class=\"elementor-column elementor-col-100 elementor-top-column elementor-element elementor-element-5a735e6\" data-id=\"5a735e6\" data-element_type=\"column\" data-e-type=\"column\">\n\t\t\t<div class=\"elementor-widget-wrap elementor-element-populated\">\n\t\t\t\t\t\t<div class=\"elementor-element elementor-element-212991a elementor-widget elementor-widget-heading\" data-id=\"212991a\" data-element_type=\"widget\" data-e-type=\"widget\" data-widget_type=\"heading.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t\t\t<h2 class=\"elementor-heading-title elementor-size-default\">En bref<\/h2>\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t\t<\/div>\n\t\t<\/div>\n\t\t\t\t\t<\/div>\n\t\t<\/section>\n\t\t\t\t<section class=\"elementor-section elementor-top-section elementor-element elementor-element-a9f06c4 elementor-section-boxed elementor-section-height-default elementor-section-height-default\" data-id=\"a9f06c4\" data-element_type=\"section\" data-e-type=\"section\">\n\t\t\t\t\t\t<div class=\"elementor-container elementor-column-gap-default\">\n\t\t\t\t\t<div class=\"elementor-column elementor-col-100 elementor-top-column elementor-element elementor-element-7e8f13e\" data-id=\"7e8f13e\" data-element_type=\"column\" data-e-type=\"column\">\n\t\t\t<div class=\"elementor-widget-wrap elementor-element-populated\">\n\t\t\t\t\t\t<div class=\"elementor-element elementor-element-f5c1aff elementor-widget elementor-widget-text-editor\" data-id=\"f5c1aff\" data-element_type=\"widget\" data-e-type=\"widget\" data-widget_type=\"text-editor.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t\t\t\t\t\t\t<p class=\"p1\">L&rsquo;\u00e9tude de Columbia University expose une r\u00e9alit\u00e9 d\u00e9rangeante. Les march\u00e9s de pr\u00e9diction d\u00e9centralis\u00e9s, malgr\u00e9 leurs promesses de transparence et d&rsquo;efficacit\u00e9, restent vuln\u00e9rables aux m\u00eames manipulations que les march\u00e9s traditionnels, parfois de mani\u00e8re amplifi\u00e9e par l&rsquo;anonymat blockchain. Pour Polymarket, la question n&rsquo;est plus de savoir si le wash trading existe mais comment la plateforme compte y rem\u00e9dier. L&rsquo;introduction de frais de transaction, d&rsquo;une v\u00e9rification d&rsquo;identit\u00e9 ou d&rsquo;algorithmes de d\u00e9tection pourrait limiter le probl\u00e8me, mais au prix potentiel de la d\u00e9centralisation et de l&rsquo;accessibilit\u00e9 qui font l&rsquo;ADN du projet.<\/p><p class=\"p1\">Alors que Google vient d&rsquo;annoncer l&rsquo;int\u00e9gration des donn\u00e9es de Polymarket et Kalshi directement dans son moteur de recherche, exposant ces plateformes \u00e0 des millions d&rsquo;utilisateurs suppl\u00e9mentaires, la pression pour nettoyer ces pratiques ne fera que cro\u00eetre. La cr\u00e9dibilit\u00e9 \u00e0 long terme des march\u00e9s de pr\u00e9diction d\u00e9pendra de leur capacit\u00e9 \u00e0 distinguer signal authentique et bruit artificiel.<\/p>\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t\t<\/div>\n\t\t<\/div>\n\t\t\t\t\t<\/div>\n\t\t<\/section>\n\t\t\t\t<section class=\"elementor-section elementor-top-section elementor-element elementor-element-3b836ba elementor-section-boxed elementor-section-height-default elementor-section-height-default\" data-id=\"3b836ba\" data-element_type=\"section\" data-e-type=\"section\">\n\t\t\t\t\t\t<div class=\"elementor-container elementor-column-gap-default\">\n\t\t\t\t\t<div class=\"elementor-column elementor-col-100 elementor-top-column elementor-element elementor-element-4c3d7f0\" data-id=\"4c3d7f0\" data-element_type=\"column\" data-e-type=\"column\">\n\t\t\t<div class=\"elementor-widget-wrap elementor-element-populated\">\n\t\t\t\t\t\t<div class=\"elementor-element elementor-element-f5eac9d elementor-widget elementor-widget-text-editor\" data-id=\"f5eac9d\" data-element_type=\"widget\" data-e-type=\"widget\" data-widget_type=\"text-editor.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t\t\t\t\t\t\t<p><strong>Sources<\/strong> :<\/p><ul><li><a href=\"https:\/\/decrypt.co\/347842\/columbia-study-25-polymarket-volume-wash-trading\">Decrypt<\/a><\/li><li><a href=\"https:\/\/finance.yahoo.com\/news\/columbia-university-study-claims-25-001118519.html\">Yahoo<\/a><\/li><\/ul>\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t\t<\/div>\n\t\t<\/div>\n\t\t\t\t\t<\/div>\n\t\t<\/section>\n\t\t\t\t<\/div>","protected":false},"excerpt":{"rendered":"<p>Des chercheurs de Columbia University ont analys\u00e9 plus de deux ans de donn\u00e9es blockchain et concluent qu&rsquo;environ 25% du volume historique de Polymarket serait du wash trading, atteignant 60% \u00e0 son pic.<\/p>","protected":false},"author":18,"featured_media":15119,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"_mo_disable_npp":"","_jetpack_memberships_contains_paid_content":false,"footnotes":""},"categories":[15,42],"tags":[],"ppma_author":[145],"class_list":["post-15097","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-actualites","category-news-de-la-semaine"],"yoast_head":"<!-- This site is optimized with the Yoast SEO plugin v27.3 - https:\/\/yoast.com\/product\/yoast-seo-wordpress\/ -->\n<title>Polymarket : 25% du volume serait du wash trading - BIM Blog<\/title>\n<meta name=\"description\" content=\"Une \u00e9tude de Columbia University r\u00e9v\u00e8le que 25% du volume de trading sur Polymarket pourrait \u00eatre du wash trading. 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