{"id":25956,"date":"2025-11-07T17:00:18","date_gmt":"2025-11-07T17:00:18","guid":{"rendered":"https:\/\/99bitcoins.com\/fr\/?p=25956"},"modified":"2025-11-07T16:27:45","modified_gmt":"2025-11-07T16:27:45","slug":"secret-derangeant-derriere-volumes-record-polymarket","status":"publish","type":"post","link":"https:\/\/99bitcoins.com\/fr\/actu\/secret-derangeant-derriere-volumes-record-polymarket\/","title":{"rendered":"Le secret d\u00e9rangeant derri\u00e8re les volumes record de Polymarket"},"content":{"rendered":"<p>Derri\u00e8re la fa\u00e7ade brillante de Polymarket, <strong>le doute s\u2019installe.<\/strong> Une \u00e9tude de Columbia University vient de semer le trouble dans l\u2019un des march\u00e9s de pr\u00e9diction les plus suivis du Web3.<\/p>\n<p>Des chercheurs affirment <strong>qu\u2019une part importante du volume d\u2019\u00e9change<\/strong> sur la plateforme ne serait pas aussi r\u00e9elle qu\u2019elle en a l\u2019air. Le march\u00e9 qui disait pr\u00e9dire l\u2019avenir aurait peut-\u00eatre un petit probl\u00e8me avec la r\u00e9alit\u00e9.<\/p>\n<h2>Quand la \u201csagesse des foules\u201d s\u2019emballe<\/h2>\n<p>Polymarket a longtemps \u00e9t\u00e9 la vitrine de la finance pr\u00e9dictive. <strong>On y parie sur tout, de la victoire d\u2019un candidat au prix du Bitcoin.<\/strong> Ces chiffres sont cens\u00e9s refl\u00e9ter la sagesse collective, la somme des intuitions humaines compress\u00e9e en probabilit\u00e9s de march\u00e9. Sauf que voil\u00e0, selon Columbia, environ 25 % de ces volumes seraient artificiels.<\/p>\n<p>Les chercheurs ont diss\u00e9qu\u00e9 des milliers de transactions et d\u00e9couvert des sch\u00e9mas compatibles avec du <em>wash trading<\/em>. Des <a class=\"general-link\" title=\"Wallet crypto : notre s\u00e9lection des meilleurs portefeuilles crypto en 2025\" href=\"https:\/\/99bitcoins.com\/fr\/crypto-monnaie\/wallets\/\" rel=\"\">portefeuilles<\/a> s\u2019\u00e9changent des contrats entre eux, encore et encore, sans v\u00e9ritable changement de position. Dans certains march\u00e9s, notamment sportifs, <strong>cette part grimpe jusqu\u2019\u00e0 environ 45 %.<\/strong> Presque la moiti\u00e9. Et \u00e7a change tout.<\/p>\n<p>Car dans un march\u00e9 de pr\u00e9diction, le volume n\u2019est pas qu\u2019un chiffre. C\u2019est un signal de cr\u00e9dibilit\u00e9. <strong>Plus il y a d\u2019activit\u00e9, plus le public y croit.<\/strong> Si ce volume repose sur des op\u00e9rations circulaires, la confiance s\u2019\u00e9vapore. Ce n\u2019est plus une boussole collective, mais un miroir d\u00e9formant.<\/p>\n<blockquote class=\"twitter-tweet\" data-width=\"500\" data-dnt=\"true\">\n<p lang=\"en\" dir=\"ltr\">The volume of activity on Polymarket has been significantly inflated by so-called wash trading in which users rapidly buy and sell the same contracts, according to a new study by Columbia University researchers <a href=\"https:\/\/t.co\/kWTEDPn6IS\" rel=\"nofollow\" target=\"_blank\">https:\/\/t.co\/kWTEDPn6IS<\/a><\/p>\n<p>&mdash; Bloomberg (@business) <a href=\"https:\/\/twitter.com\/business\/status\/1986642903733567672?ref_src=twsrc%5Etfw\" rel=\"nofollow\" target=\"_blank\">November 7, 2025<\/a><\/p><\/blockquote>\n<p><script async src=\"https:\/\/platform.twitter.com\/widgets.js\" charset=\"utf-8\"><\/script><\/p>\n<h2>Le mod\u00e8le Polymarket sous pression<\/h2>\n<p>Les chercheurs ne pointent pas Polymarket du doigt. Ils d\u00e9crivent plut\u00f4t <strong>un environnement qui rend la manipulation possible.<\/strong> Frais minimes, anonymat total et fragmentation des march\u00e9s&#8230; Tout \u00e7a cr\u00e9e un terrain id\u00e9al pour gonfler les chiffres sans que personne ne s\u2019en aper\u00e7oive. Les volumes artificiels attirent ensuite les vrais <em>traders<\/em>.<\/p>\n<p>Et pourtant, tout n\u2019est pas noir. L\u2019\u00e9tude note que les march\u00e9s li\u00e9s \u00e0 <a href=\"https:\/\/99bitcoins.com\/fr\/crypto-monnaie\/apprendre-le-trading-crypto\/\">la crypto<\/a> restent relativement sains. <strong>Moins de 3 % d\u2019activit\u00e9 artificielle y ont \u00e9t\u00e9 rep\u00e9r\u00e9s.<\/strong> Ce sont surtout les segments sportifs et sociaux qui concentrent les anomalies. Probablement parce que ces cat\u00e9gories attirent plus d\u2019utilisateurs occasionnels, moins attentifs \u00e0 la qualit\u00e9 du flux.<\/p>\n<p>On pourrait penser que ce genre de distorsion n\u2019a rien de nouveau. Apr\u00e8s tout, les march\u00e9s traditionnels aussi ont connu leurs manipulations de volumes. Sauf que dans le cas de Polymarket, <strong>le mod\u00e8le repose sur la transparence blockchain<\/strong>, cens\u00e9e rendre la triche visible. Eh bien non. M\u00eame \u00e0 ciel ouvert, il reste facile de maquiller les apparences.<\/p>\n<p><img decoding=\"async\" class=\"aligncenter wp-image-25981 size-full\" title=\"Le mod\u00e8le Polymarket sous pression\" src=\"https:\/\/99bitcoins.com\/fr\/wp-content\/uploads\/sites\/4\/2025\/11\/polymarket1299.jpg\" alt=\"\" width=\"1200\" height=\"800\" srcset=\"https:\/\/99bitcoins.com\/fr\/wp-content\/uploads\/sites\/4\/2025\/11\/polymarket1299.jpg 1200w, https:\/\/99bitcoins.com\/fr\/wp-content\/uploads\/sites\/4\/2025\/11\/polymarket1299-300x200.jpg 300w, https:\/\/99bitcoins.com\/fr\/wp-content\/uploads\/sites\/4\/2025\/11\/polymarket1299-1024x683.jpg 1024w, https:\/\/99bitcoins.com\/fr\/wp-content\/uploads\/sites\/4\/2025\/11\/polymarket1299-768x512.jpg 768w\" sizes=\"(max-width: 1200px) 100vw, 1200px\" \/><\/p>\n<h2>Confiance, r\u00e9gulation et retour de flamme<\/h2>\n<p>Ce rapport tombe \u00e0 un moment d\u00e9licat pour Polymarket. La plateforme a d\u00e9j\u00e0 d\u00fb composer avec la CFTC am\u00e9ricaine, qui l\u2019avait sanctionn\u00e9e en 2022 pour offre non autoris\u00e9e de produits d\u00e9riv\u00e9s. Aujourd\u2019hui, alors qu\u2019elle regagne en popularit\u00e9 et attire de nouveaux investisseurs, <strong>l\u2019accusation d\u2019activit\u00e9 artificielle vient jeter un froid.<\/strong><\/p>\n<p>Si les volumes sont gonfl\u00e9s, la r\u00e9gulation risque de resserrer la vis. Et l\u2019image de thermom\u00e8tre du monde r\u00e9el qu\u2019aime revendiquer Polymarket s\u2019effrite. Pour les observateurs,<strong> c\u2019est un signal d\u2019alerte.<\/strong> Un march\u00e9 d\u00e9centralis\u00e9 ne garantit pas la puret\u00e9 des \u00e9changes. Il peut, au contraire, abriter une opacit\u00e9 plus subtile.<\/p>\n<p>En pratique, l\u2019\u00e9tude ne condamne rien d\u2019ill\u00e9gal. Elle r\u00e9v\u00e8le surtout une faille syst\u00e9mique, tant que les incitations \u00e9conomiques existent, <strong>des acteurs chercheront \u00e0 gonfler les chiffres&#8230;<\/strong> Et tant que ces chiffres inspireront confiance, le probl\u00e8me persistera. Un paradoxe bien connu du Web3. La transparence totale peut cacher un brouillard \u00e9pais.<\/p>\n<h2>Le reste d\u00e9pendra du march\u00e9<\/h2>\n<p>Alors, Polymarket sortira-t-il grandi de cette secousse ? Peut-\u00eatre. Ce genre d\u2019\u00e9lectrochoc pousse souvent les plateformes \u00e0 innover, \u00e0 renforcer leurs audits <em>on-chain<\/em>, \u00e0 prouver que la donn\u00e9e est propre. Ou alors, comme souvent, <strong>tout finira par s\u2019oublier dans la fr\u00e9n\u00e9sie des nouveaux paris.<\/strong><\/p>\n<p>Le march\u00e9 des pr\u00e9dictions n\u2019a jamais \u00e9t\u00e9 aussi populaire. Sa promesse reste belle, anticiper le futur gr\u00e2ce \u00e0 la foule. <strong>Mais cette foule, encore faut-il qu\u2019elle soit authentique.<\/strong> \u00c0 trop vouloir para\u00eetre active, Polymarket pourrait bien perdre ce qu\u2019elle avait de plus pr\u00e9cieux, sa cr\u00e9dibilit\u00e9.<\/p>\n<p>Et apr\u00e8s ? Difficile \u00e0 dire. La transparence n\u2019est jamais acquise,<strong> m\u00eame sur<\/strong> la blockchain. Et c\u2019est peut-\u00eatre \u00e7a, le vrai pari du futur.<\/p>\n<div>\n<hr>\n<p><strong>Sur le m\u00eame sujet :\u00a0<\/strong><\/p>\n<ul>\n<li><a class=\"general-link\" title=\"Malgr\u00e9 sa mise \u00e0 jour, Pi Network perd 13% en une semaine\" href=\"https:\/\/99bitcoins.com\/fr\/actu\/pi-network-mise-a-jour-chute-token\/\" rel=\"\">Malgr\u00e9 sa mise \u00e0 jour, Pi Network perd 13% en une semaine<\/a><\/li>\n<li>Bitcoin vis\u00e9 \u00e0 170 000 $ selon JPMorgan, pendant que Hyper aiguise les convoitises<\/li>\n<li>Binance pr\u00e9vient ses utilisateurs d\u2019une vague de phishing sur WhatsApp<\/li>\n<\/ul>\n<\/div>\n","protected":false},"excerpt":{"rendered":"<p>Derri\u00e8re la fa\u00e7ade brillante de Polymarket, le doute s\u2019installe. Une \u00e9tude de Columbia University vient de semer le trouble dans l\u2019un des march\u00e9s de pr\u00e9diction les plus suivis du Web3. Des chercheurs affirment qu\u2019une part importante du volume d\u2019\u00e9change sur la plateforme ne serait pas aussi r\u00e9elle qu\u2019elle en a l\u2019air. Le march\u00e9 qui disait..<\/p>\n","protected":false},"author":136117,"featured_media":25980,"comment_status":"closed","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"_acf_changed":false,"inline_featured_image":false,"footnotes":""},"categories":[10,6],"tags":[11],"coin":[15],"class_list":["post-25956","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-altcoins","category-actu","tag-altcoin"],"acf":[],"yoast_head":"<!-- This site is optimized with the Yoast SEO plugin v27.7 - https:\/\/yoast.com\/product\/yoast-seo-wordpress\/ -->\n<title>Le secret d\u00e9rangeant derri\u00e8re les volumes record de Polymarket<\/title>\n<meta name=\"description\" content=\"Une \u00e9tude de Columbia r\u00e9v\u00e8le que pr\u00e8s d\u2019un quart des volumes de Polymarket seraient gonfl\u00e9s par une activit\u00e9 artificielle.\" \/>\n<meta name=\"robots\" content=\"index, follow, max-snippet:-1, max-image-preview:large, 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J\u2019ai d\u00e9couvert le Bitcoin en 2016, mais c\u2019est en 2018, en pleine phase baissi\u00e8re, que j\u2019ai r\u00e9ellement plong\u00e9 dans l\u2019analyse des cycles, des projets et des opportunit\u00e9s que propose l\u2019\u00e9cosyst\u00e8me crypto. Aujourd\u2019hui, je consacre mon temps \u00e0 l\u2019\u00e9tude des tendances du march\u00e9, \u00e0 la recherche de projets innovants, et au partage de strat\u00e9gies accessibles aussi bien aux d\u00e9butants qu\u2019aux investisseurs aguerris. En parall\u00e8le, je suis \u00e9galement r\u00e9dacteur sp\u00e9cialis\u00e9 en crypto et finance d\u00e9centralis\u00e9e. Mon objectif : rendre l\u2019information claire, p\u00e9dagogique et fiable, dans un univers o\u00f9 la d\u00e9sinformation peut co\u00fbter cher. J\u2019interviens sur ce site pour proposer des analyses, d\u00e9crypter l\u2019actualit\u00e9, vulgariser des concepts complexes, et offrir des perspectives concr\u00e8tes sur les mouvements du march\u00e9. Que ce soit pour du swing trading, du scalping ou de l\u2019investissement long terme, je m\u2019efforce d\u2019apporter une vision structur\u00e9e et pragmatique. La crypto est plus qu\u2019un march\u00e9 : c\u2019est une r\u00e9volution en marche. 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Durant","image":{"@type":"ImageObject","inLanguage":"fr-FR","@id":"https:\/\/secure.gravatar.com\/avatar\/4612e4c10d00d2e68478864de7346bf5c83a2d5a754c96ef605a8574a2432cef?s=96&d=mm&r=g","url":"https:\/\/secure.gravatar.com\/avatar\/4612e4c10d00d2e68478864de7346bf5c83a2d5a754c96ef605a8574a2432cef?s=96&d=mm&r=g","contentUrl":"https:\/\/secure.gravatar.com\/avatar\/4612e4c10d00d2e68478864de7346bf5c83a2d5a754c96ef605a8574a2432cef?s=96&d=mm&r=g","caption":"Esteban Durant"},"description":"Trader en crypto-actifs depuis plusieurs ann\u00e9es et passionn\u00e9 par l\u2019univers d\u00e9centralis\u00e9, je combine analyse technique, compr\u00e9hension des fondamentaux et suivi macro\u00e9conomique pour naviguer efficacement sur les march\u00e9s volatils. J\u2019ai d\u00e9couvert le Bitcoin en 2016, mais c\u2019est en 2018, en pleine phase baissi\u00e8re, que j\u2019ai r\u00e9ellement plong\u00e9 dans l\u2019analyse des cycles, des projets et des opportunit\u00e9s que propose l\u2019\u00e9cosyst\u00e8me crypto. Aujourd\u2019hui, je consacre mon temps \u00e0 l\u2019\u00e9tude des tendances du march\u00e9, \u00e0 la recherche de projets innovants, et au partage de strat\u00e9gies accessibles aussi bien aux d\u00e9butants qu\u2019aux investisseurs aguerris. En parall\u00e8le, je suis \u00e9galement r\u00e9dacteur sp\u00e9cialis\u00e9 en crypto et finance d\u00e9centralis\u00e9e. Mon objectif : rendre l\u2019information claire, p\u00e9dagogique et fiable, dans un univers o\u00f9 la d\u00e9sinformation peut co\u00fbter cher. J\u2019interviens sur ce site pour proposer des analyses, d\u00e9crypter l\u2019actualit\u00e9, vulgariser des concepts complexes, et offrir des perspectives concr\u00e8tes sur les mouvements du march\u00e9. Que ce soit pour du swing trading, du scalping ou de l\u2019investissement long terme, je m\u2019efforce d\u2019apporter une vision structur\u00e9e et pragmatique. La crypto est plus qu\u2019un march\u00e9 : c\u2019est une r\u00e9volution en marche. Et je suis l\u00e0 pour vous aider \u00e0 y voir clair.","url":"https:\/\/99bitcoins.com\/fr\/author\/estebandurant\/"}]}},"_links":{"self":[{"href":"https:\/\/99bitcoins.com\/fr\/wp-json\/wp\/v2\/posts\/25956","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/99bitcoins.com\/fr\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/99bitcoins.com\/fr\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/99bitcoins.com\/fr\/wp-json\/wp\/v2\/users\/136117"}],"replies":[{"embeddable":true,"href":"https:\/\/99bitcoins.com\/fr\/wp-json\/wp\/v2\/comments?post=25956"}],"version-history":[{"count":4,"href":"https:\/\/99bitcoins.com\/fr\/wp-json\/wp\/v2\/posts\/25956\/revisions"}],"predecessor-version":[{"id":31619,"href":"https:\/\/99bitcoins.com\/fr\/wp-json\/wp\/v2\/posts\/25956\/revisions\/31619"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/99bitcoins.com\/fr\/wp-json\/wp\/v2\/media\/25980"}],"wp:attachment":[{"href":"https:\/\/99bitcoins.com\/fr\/wp-json\/wp\/v2\/media?parent=25956"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/99bitcoins.com\/fr\/wp-json\/wp\/v2\/categories?post=25956"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/99bitcoins.com\/fr\/wp-json\/wp\/v2\/tags?post=25956"},{"taxonomy":"coin","embeddable":true,"href":"https:\/\/99bitcoins.com\/fr\/wp-json\/wp\/v2\/coin?post=25956"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}