Polymarket
Polymarket
This is a comprehensive overview of Polymarket as a prediction market platform, covering its history, mechanics, and accuracy, but has minimal relevance to AI safety beyond brief mentions in the EA/forecasting section. While well-documented, it primarily serves as general reference material about a financial platform rather than addressing AI risk or safety concerns.
Quick Assessment
| Dimension | Assessment |
|---|---|
| Type | Prediction market platform |
| Founded | 2020 |
| Founder | Shayne Coplan |
| Valuation | $8-9 billion (October 2025) |
| Key Innovation | Decentralized, non-custodial prediction marketsApproachPrediction Markets (AI Forecasting)Prediction markets achieve Brier scores of 0.16-0.24 (15-25% better than polls) by aggregating dispersed information through financial incentives, with platforms handling \$1-3B annually. For AI sa...Quality: 56/100 on Polygon blockchain |
| Accuracy | >90% accuracy within 1 month of event resolution |
| Major Funding | $2 billion from Intercontinental Exchange (ICE) in October 2025 |
| Regulatory Status | CFTC-compliant after 2025 QCEX acquisition; banned for U.S. users 2022-2025 |
Key Links
| Source | Link |
|---|---|
| Official Website | polymarket.com |
| Wikipedia | en.wikipedia.org |
| Wikidata | wikidata.org |
Overview
Polymarket is the world's largest prediction market platform, a decentralized protocol built on the Polygon blockchain that allows users to buy and sell shares in the outcomes of real-world events across politics, sports, economics, and entertainment.1 Users trade peer-to-peer using USDC stablecoin without intermediaries, with share prices ranging between $0.00 and $1.00 reflecting market-determined probabilities—for example, a 20-cent YES share indicates an 18-20% chance of the event occurring.2 Correct outcome shares redeem for $1.00 USDC upon resolution via on-chain oracles like Chainlink.3
Founded in 2020 by Shayne Coplan, Polymarket positions itself as providing accurate, unbiased, and real-time probabilities for significant events by leveraging prediction markets where participants are financially incentivized to forecast truthfully.4 The platform emphasizes global, anonymous, transparent trading where prices adjust in real-time based on supply, demand, and new information.5 Research shows Polymarket achieves prediction accuracy exceeding 90% even one month before event resolution, with accuracy increasing closer to resolution times.6
By late 2025, Polymarket had processed over $8 billion in predictions during 2024 alone, with monthly volumes exceeding $13.5 billion and 43 million transactions by November 2025.7 The platform achieved mainstream recognition during the 2024 U.S. presidential election, where it outperformed traditional polling by calling states faster and with higher confidence, driven by open access and a single bettor wagering approximately $45 million against mainstream polls.8 This success attracted a $2 billion strategic investment from Intercontinental Exchange (ICE, parent company of NYSE) in October 2025, valuing the company at $8-9 billion.9
History
Founding and Early Development (2020-2021)
Polymarket was founded by Shayne Coplan, a New York University dropout, in 2020 at age 21.10 Coplan launched the platform from what he described as a "makeshift bathroom office" in his Lower East Side apartment during the COVID-19 pandemic.11 Initially operating under names like Union.market or Blockratize, Inc. (incorporated in Delaware), Coplan was inspired by economist Robin HansonPersonRobin HansonComprehensive biographical entry on Robin Hanson covering his contributions to prediction markets, futarchy governance, and skeptical AI safety positions. The page provides valuable context on a si...Quality: 53/100's work on prediction markets and aimed to create a blockchain-based platform on the Polygon network to counter misinformation.12
The platform officially launched in June 2020, coinciding with both the COVID-19 pandemic and the U.S. presidential election.13 Coplan's vision was to "democratize foresight" through open, auditable, censorship-resistant event markets covering topics from crypto prices to elections and world events.14 In October 2020, Polymarket raised $4 million in seed funding led by Polychain Capital.15
In March 2021, the company completed a $24.84 million Series A round, with post-money valuation speculated in the low hundreds of millions.16
Regulatory Challenges (2021-2024)
Polymarket's growth trajectory was disrupted by regulatory scrutiny. In October 2021, the U.S. Commodity Futures Trading Commission (CFTC) began investigating the platform.17 This investigation culminated in January 2022 when the CFTC fined Polymarket $1.4 million and issued a cease-and-desist order for operating as an unregistered Swap Execution Facility.18 The company cooperated substantially with regulators, which reduced the penalty amount, but was required to wind down U.S. operations.19
Following the settlement, Polymarket relocated operations to Panama and implemented measures prohibiting U.S. users and VPN circumvention.20 Despite these restrictions, enforcement remained weak, and the platform continued to attract global users. In May 2022, Polymarket appointed J. Christopher Giancarlo, former CFTC Commissioner, as chairman of its advisory board.21
During this period, Polymarket continued raising capital. In October 2024, the company completed a $50 million Series B round at an estimated $500-600 million valuation.22 By July 2024, the platform recorded $387 million in monthly trading volume.23
Mainstream Breakthrough (2024-2025)
The 2024 U.S. presidential election marked a turning point for Polymarket. The platform experienced a 48x surge in trading volume, with over $8 billion in predictions made during 2024.24 Research published in May 2024 found that Polymarket outperformed traditional polling in predicting the election outcome, particularly in swing states, adjusting dynamically to real-world events like assassination attempts and debate performances while polling remained relatively static.25
One notable trader earned $85 million in net profit on election night, highlighting both the platform's liquidity and the potential returns for accurate forecasting.26 This success attracted significant media attention and positioned Polymarket as a credible alternative to traditional polling methods.
In May 2024, Polymarket raised $70 million across two rounds ($25 million Series A led by General Catalyst and $45 million Series B led by Founders FundOrganizationFounders FundFounders Fund is a \$17B contrarian VC firm that has backed major AI companies like OpenAI and DeepMind but shows no explicit focus on AI safety or alignment research, instead emphasizing rapid cap...Quality: 50/100), with participation from Ethereum co-founder Vitalik Buterin.27 The funding rounds valued the company significantly higher than previous rounds and included backing from prominent figures like Peter Thiel through Founders Fund.28
U.S. Return and Recent Growth (2025-2026)
July 2025 marked a major regulatory victory when the U.S. Department of Justice and CFTC terminated their investigation with no charges filed.29 Polymarket capitalized on this by acquiring QCEX, a CFTC-licensed exchange and clearinghouse, for $112 million, enabling legal U.S. operations.30 In September 2025, the CFTC issued a no-action relief letter allowing U.S. operations under specific conditions.31
The regulatory green light attracted unprecedented investment. On October 8, 2025, Intercontinental Exchange (ICE) invested $2 billion at an $8-9 billion valuation, making Polymarket one of the most valuable prediction market platforms globally.32 This investment came with a strategic partnership making ICE the global distributor of Polymarket's event-driven data for sentiment indicators.33
In August 2025, Donald Trump Jr. joined Polymarket's advisory board via his 1789 Capital fund, which also invested approximately $10 million in the platform.34 Combined with record trading volumes—$10 billion in November 2025 across sports, politics, and macroeconomics—Polymarket positioned itself as the dominant player in prediction markets.35
By late 2025, Polymarket had established major partnerships including agreements with Major League Soccer (MLS) and Leagues Cup (announced January 26, 2026), the New York Rangers, UFC and Zuffa Boxing, and PrizePicks (announced November 11, 2025).36 The platform also announced an official partnership with X (formerly Twitter) on June 6, 2025, integrating Polymarket odds with Grok analysis and X posts for real-time insights.37
Despite federal regulatory progress, Polymarket faced state-level resistance in early 2025, including a Nevada Gaming Control Board injunction and Tennessee shutdown orders for sports markets.38 The platform also expanded internationally but encountered bans in countries including Portugal, Taiwan, and temporarily Hungary.39
Platform Mechanics and Accuracy
Trading Structure
Polymarket operates as a non-custodial protocol where YES and NO shares for any event are fully collateralized by $1.00 USDC.40 Share prices directly represent probabilities—an 18-cent YES share indicates an 18% chance of the event occurring.41 Users can sell shares anytime before resolution to lock in profits or cut losses, with payouts confirmed by oracles like Chainlink after events resolve.42
The platform supports any Polygon/USDC-compatible wallet and offers easy deposits through integrations with PayPal and card payments via QR codes.43 Trading is peer-to-peer without a house or middlemen, with the blockchain providing transparency and auditability.44
Prediction Accuracy
Multiple studies have examined Polymarket's forecasting accuracy. Research shows the platform achieves prediction accuracy exceeding 90% even one month before event resolution, with accuracy increasing at 4 hours, 12 hours, 1 day, and 1 week before resolution.45 The platform's Brier scores—which measure prediction accuracy by squared error, where lower is better—align closely with actual outcomes across probability ranges.46
A comprehensive ETH Zürich thesis analyzing over 2 million buy/sell transactions across 9,026 markets found an average Brier score of approximately 0.15, indicating strong accuracy, though with no clear correlation to market volume.47 Research on the 2024 presidential election found that while Polymarket forecasts exhibited greater uncertainty than polling data (due to random-walk-like financial market characteristics), they were overall more accurate and responded more dynamically to real-world events.48
However, accuracy limitations exist for long-term predictions due to speculation and external variables, with the platform tending to overestimate probabilities by approximately 2 points across ranges.49 Limited historical data also hampers granular analysis by event type, such as NFL games versus political outcomes.50
Market Microstructure
Academic research has identified significant arbitrage opportunities within Polymarket. A study titled "Unravelling the Probabilistic Forest: Arbitrage in Prediction Markets" identified two distinct arbitrage forms: Market Rebalancing Arbitrage (within single markets) and Combinatorial Arbitrage (across multiple markets).51 The research estimated approximately $40 million in realized arbitrage profits extracted from the platform between April 2024 and April 2025.52
Top arbitrageurs earned $4.2 million across the three most profitable wallets, with new market liquidity provision yielding 80-200% annualized returns at peak and automated market-making generating $700-800 per day during high-volume periods.53 However, post-election liquidity rewards declined significantly as competition intensified and setup costs for high-frequency trading (requiring VPS servers near exchange servers and quantitative algorithms) increased.54
Effective Altruism and Forecasting Communities
Polymarket receives generally positive reception within the LessWrongOrganizationLessWrongLessWrong is a rationality-focused community blog founded in 2009 that has influenced AI safety discourse, receiving \$5M+ in funding and serving as the origin point for ~31% of EA survey responden...Quality: 44/100 and Effective Altruism communities, viewed as a superior real-money prediction market for processing information quickly and accurately compared to legacy institutions and traditional forecasting platforms.55 Discussions highlight the platform's speed, openness, and relevance to high-impact topics including AI progress, geopolitics, and existential risks.56
Nuño SemperePersonNuño SempereNuño Sempere is a Spanish superforecaster who co-founded the highly successful Samotsvety forecasting group and now runs Sentinel for global catastrophe early warning, while being known for skeptic...Quality: 50/100 leads efforts to subsidize Polymarket markets on high-impact topics through a ManifundOrganizationManifundManifund is a \$2M+ annual charitable regranting platform (founded 2022) that provides fast grants (<1 week) to AI safety projects through expert regrantors (\$50K-400K budgets), fiscal sponsorship...Quality: 50/100 project that raised $8,000 for a pilot program in April 2023.57 The project deploys funds via an automated market maker (AMM) bot to provide liquidity for markets on topics like the Ukraine War, AI Progress, and North Korean nuclear tests, maintaining fund custody via decentralized wallets in partnership with the Polymarket team.58
Community members note operational advantages over platforms like MetaculusOrganizationMetaculusMetaculus is a reputation-based forecasting platform with 1M+ predictions showing AGI probability at 25% by 2027 and 50% by 2031 (down from 50 years away in 2020). Analysis finds good short-term ca...Quality: 50/100, though some point out that Polymarket has experienced technical problems similar to Metaculus during high-stakes events like the Ukraine conflict.59 Arb ResearchOrganizationArb ResearchArb Research is a small AI safety consulting firm that produces methodologically rigorous research and evaluations, particularly known for their AI Safety Camp impact assessment and forecasting wor...Quality: 50/100 proposed Polymarket-compatible questions for AI safety tournaments focusing on AI benchmarks, demonstrating the platform's potential application to technical forecasting.60
However, the communities also note limitations. Few forecasts and track records are clearly visible on LessWrongOrganizationLessWrongLessWrong is a rationality-focused community blog founded in 2009 that has influenced AI safety discourse, receiving \$5M+ in funding and serving as the origin point for ~31% of EA survey responden...Quality: 44/100 itself, with top users lacking transparent records.61 Additionally, there are documented hurdles in using forecasting platforms including Polymarket for AI progress predictions, with frustrations about discourse quality on the EA Forum regarding these applications.62
Funding and Business Model
Investment History
Polymarket has raised over $2 billion in total funding across multiple rounds:
| Round | Date | Amount | Lead Investor(s) | Valuation |
|---|---|---|---|---|
| Seed | October 2020 | $4M | Polychain Capital | Undisclosed |
| Series A | March 2021 | $24.84M | General Catalyst | ≈$100M+ (estimated) |
| Series B | October 2024 | $50M | Founders Fund | $500-600M |
| Series B | February 2025 | $5M | Undisclosed | Undisclosed |
| Series C | July 2025 | $135.37M | Undisclosed | Undisclosed |
| Strategic Investment | October 2025 | $2B | Intercontinental Exchange | $8-9B |
Key investors include Polychain Capital (seed lead), Founders Fund (associated with Peter Thiel), and Vitalik Buterin (Ethereum co-founder).64 The October 2025 ICE investment represents the largest single investment and came with a strategic data distribution partnership.65
The platform pursues an additional funding round targeting a $12-15 billion valuation as of late 2025.66 Secondary market activity shows Polymarket stock trading at approximately $144.64 per share as of January 30, 2026, with 36 live orders and no public IPO planned.67
Revenue Model
As of October 2025, Polymarket's revenue remains limited and venture capital-subsidized, with platform trading remaining free of direct trading fees.68 The company generates revenue indirectly through market-making bid-ask spreads and potentially from interest on USDC balances, though this remains unconfirmed.69
The ICE partnership initiated data sales, with Polymarket providing institutional feeds of event-driven data for sentiment analysis.70 In January 2026, the company announced a Dow Jones partnership for exclusive Wall Street Journal integration, expanding data monetization opportunities.71
Future revenue prospects include trading fees in regulated markets, a potential $POLY governance token for staking and rewards, premium features, and expanded data monetization.72 The platform's growth trajectory remains tied to high-volume events, with $3.3 billion wagered during the 2024 election cycle driving much of its visibility and liquidity.73
Criticisms and Controversies
Market Manipulation
Polymarket has faced repeated accusations of allowing manipulation in its prediction markets, particularly through governance mechanisms involving UMA voting and whale influence.74 A recent betting contract was manipulated by an anonymous whale, yet Polymarket refused refunds, stating it was not a platform failure despite the contract resolving contrary to reality.75 The team held meetings with UMA but offered no specific fixes beyond soliciting community ideas.76
This pattern is not isolated. The "Is Barron Trump related to DJT memecoin on Solana?" contract was resolved "No" by UMA but flipped to "Yes" by Polymarket without explanation, and smaller manipulation cases have occurred previously.77 Critics argue Polymarket's "decentralized truth system" claim is dangerous due to whale voting power in UMA governance, demanding immediate amendments to the resolution process.78
The CFTC has noted that unregulated prediction markets like Polymarket are highly susceptible to manipulation, citing these concerns in its lawsuit against competitor KalshiOrganizationKalshi (Prediction Market)This is a corporate profile of Kalshi, a US prediction market platform regulated by the CFTC. The page covers its founding history, fee structure, regulatory disputes, partnerships, and AI-related ...Quality: 25/100.79
Wash Trading
A Columbia University study posted to SSRN in November 2025 found that wash trading—artificial trading activity to inflate volume—averaged 25% of buying and selling over the past three years on Polymarket.80 Wash trading peaked at approximately 60% in December (year unspecified), fell to 5% in May, and rose to approximately 20% in early October 2025.81
This artificial activity potentially distorts prices, market sentiment, and the platform's claims about "wisdom of crowds" accuracy.82 The crypto structure enables wash trading, though Polymarket is not directly responsible for this behavior.83 The prevalence of wash trading raises questions about the authenticity of the platform's record trading volumes and whether prices accurately reflect genuine market sentiment.
Insider Trading Concerns
Suspicious trades by anonymous users with apparent nonpublic information have sparked concerns about market integrity. An anonymous trader profited $400,000 betting on Venezuelan President Maduro's actions ahead of a U.S. operation, raising insider trading fears and criticism that such activity threatens U.S. market integrity.84
Representative Ritchie Torres (D-NY) introduced legislation in January 2026 to restrict government employees from using platforms like Polymarket, calling the insider trading-government nexus "corrupting."85 Representative Dina Titus (D-Nev.) requested information about safeguards from Polymarket CEO Shayne Coplan.86
While Polymarket bans U.S. users, enforcement is weak (easily circumvented via VPNs), and the platform prohibits manipulation in its terms but declined to comment on the Venezuela incident.87 The CFTC lacks sufficient resources to effectively police the vast array of markets, and courts and regulators struggle with establishing clear rules amid Polymarket's $9 billion valuation.88
Proponents, particularly libertarians, view insider trading as a feature that surfaces information faster than traditional media, but suspicions persist among the political class despite support from Republican investors including Peter Thiel, Donald Trump Jr., and Marc AndreessenPersonMarc Andreessen (AI Investor)Marc Andreessen is a highly influential venture capitalist managing $90B+ who strongly opposes AI safety measures and alignment research, arguing that any slowdown in AI development "will cost live...Quality: 58/100.89
User Profitability and Inequality
Blockchain analysis of approximately 1.7 million unique Polymarket addresses shows that 70% of users realized net losses, with only 30% achieving net gains.90 Less than 0.04% of addresses captured over 70% of total realized profits ($3.7 billion).91 Earning more than $1,000 placed an address in the top 4.9% of users, and over 140 addresses lost more than $1 million each.92
This extreme wealth concentration challenges perceptions of accessibility in crypto speculation and raises questions about whether prediction markets primarily benefit sophisticated traders and arbitrageurs at the expense of retail participants.93
State Regulatory Resistance
Despite federal regulatory progress, Polymarket faces mounting state-level opposition. In January 2026, the Tennessee Sports Wagering Council issued a cease-and-desist order alleging Polymarket operates as an unlicensed sportsbook.94 Nevada Gaming Control Board issued similar injunctions, and countries including Portugal, Taiwan, and temporarily Hungary have banned the platform, challenging its claims that prediction markets differ fundamentally from gambling.95
This "guerrilla war" from state regulators persists despite federal CFTC approval and threatens Polymarket's ability to operate legally across all U.S. jurisdictions.96
Key Uncertainties
Several important questions remain about Polymarket's future trajectory and broader impact:
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Regulatory Stability: Will state-level regulatory resistance undermine federal approval, and can Polymarket maintain compliance across multiple jurisdictions with differing interpretations of prediction markets versus gambling?
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Manipulation Mitigation: Can Polymarket develop effective mechanisms to prevent whale manipulation in UMA governance and reduce wash trading without compromising decentralization principles?
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Long-term Accuracy: How will prediction accuracy evolve as markets mature and more sophisticated participants enter, particularly for long-term forecasts on complex topics like AI progress?
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Sustainable Business Model: Can Polymarket transition from venture capital subsidies to sustainable revenue through data sales, trading fees, or other mechanisms without degrading user experience?
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Market Liquidity: Will liquidity remain sufficient across diverse event types after election cycles end, or will the platform become concentrated in a few high-volume categories?
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Insider Trading Enforcement: How can prediction markets prevent or detect insider trading while maintaining anonymous, permissionless access?
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AI Safety Applications: Can Polymarket effectively serve as a forecasting tool for technical AI safety questions, or do these topics require different market structures or participant expertise?
Sources
Footnotes
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Citation rc-075e (data unavailable) ↩
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What is Polymarket? - Atomic Wallet — What is Polymarket? - Atomic Wallet ↩
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Polymarket Explained - YouTube — Polymarket Explained - YouTube ↩
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What are Prediction Markets? - Polymarket FAQ — What are Prediction Markets? - Polymarket FAQ ↩
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Polymarket Case Study - Allied VC — Polymarket Case Study - Allied VC ↩
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EA Forum - Forecasting Topic — EA Forum - Forecasting Topic ↩
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Polymarket Raises $2B at $9B Valuation - Insights4VC — Polymarket Raises $2B at $9B Valuation - Insights4VC ↩
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Polymarket - Brief History - Canvas Business Model — Polymarket - Brief History - Canvas Business Model ↩
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Polymarket Raises $2B at $9B Valuation - Odaily — Polymarket Raises $2B at $9B Valuation - Odaily ↩
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Polymarket - Brief History - Canvas Business Model — Polymarket - Brief History - Canvas Business Model ↩
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Polymarket - Brief History - Canvas Business Model — Polymarket - Brief History - Canvas Business Model ↩
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Polymarket Raises $2B at $9B Valuation - Insights4VC — Polymarket Raises $2B at $9B Valuation - Insights4VC ↩
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Polymarket - Brief History - Canvas Business Model — Polymarket - Brief History - Canvas Business Model ↩
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Forecasting Newsletter January 2022 - EA Forum — Forecasting Newsletter January 2022 - EA Forum ↩
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Polymarket Raises $2B at $9B Valuation - Insights4VC — Polymarket Raises $2B at $9B Valuation - Insights4VC ↩
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Polymarket - Brief History - Canvas Business Model — Polymarket - Brief History - Canvas Business Model ↩
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Polymarket Case Study - Allied VC — Polymarket Case Study - Allied VC ↩
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What Five Academic Papers Say About Prediction Markets - Next Event Horizon — What Five Academic Papers Say About Prediction Markets - Next Event Horizon ↩
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Polymarket - Brief History - Canvas Business Model — Polymarket - Brief History - Canvas Business Model ↩
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Polymarket Raises $2B at $9B Valuation - Odaily — Polymarket Raises $2B at $9B Valuation - Odaily ↩
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ICE Announces Strategic Investment in Polymarket — ICE Announces Strategic Investment in Polymarket ↩
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Polymarket CEO Shayne Coplan - 60 Minutes Transcript — Polymarket CEO Shayne Coplan - 60 Minutes Transcript ↩
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Kalshi Polymarket Record November Volume - RareEvo — Kalshi Polymarket Record November Volume - RareEvo ↩
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MLS and Polymarket Announce Multi-Year Partnership — MLS and Polymarket Announce Multi-Year Partnership ↩
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Polymarket and X Announce Official Prediction Market Partnership — Polymarket and X Announce Official Prediction Market Partnership ↩
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Polymarket Being Banned in More Countries - Trending Topics — Polymarket Being Banned in More Countries - Trending Topics ↩
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Polymarket Being Banned in More Countries - Trending Topics — Polymarket Being Banned in More Countries - Trending Topics ↩
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What is Polymarket? - Atomic Wallet — What is Polymarket? - Atomic Wallet ↩
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What are Prediction Markets? - Polymarket FAQ — What are Prediction Markets? - Polymarket FAQ ↩
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Polymarket Explained - YouTube — Polymarket Explained - YouTube ↩
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What is Polymarket? - Atomic Wallet — What is Polymarket? - Atomic Wallet ↩
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Polymarket Accuracy Dashboard — Polymarket Accuracy Dashboard ↩
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Liquidity Improvements for Prediction Markets - ETH Zürich — Liquidity Improvements for Prediction Markets - ETH Zürich ↩
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What Five Academic Papers Say About Prediction Markets - Next Event Horizon — What Five Academic Papers Say About Prediction Markets - Next Event Horizon ↩
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Is Polymarket Accurate? - CoinCodex — Is Polymarket Accurate? - CoinCodex ↩
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Is Polymarket Accurate? - CoinCodex — Is Polymarket Accurate? - CoinCodex ↩
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Unravelling the Probabilistic Forest: Arbitrage in Prediction Markets - arXiv — Unravelling the Probabilistic Forest: Arbitrage in Prediction Markets - arXiv ↩
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Unravelling the Probabilistic Forest: Arbitrage in Prediction Markets - arXiv — Unravelling the Probabilistic Forest: Arbitrage in Prediction Markets - arXiv ↩
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EA Forum - Forecasting Topic — EA Forum - Forecasting Topic ↩
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EA Forum - Forecasting Topic — EA Forum - Forecasting Topic ↩
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Subsidize Real-Money Prediction Markets on High-Impact Topics - Manifund — Subsidize Real-Money Prediction Markets on High-Impact Topics - Manifund ↩
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Subsidize Real-Money Prediction Markets on High-Impact Topics - Manifund — Subsidize Real-Money Prediction Markets on High-Impact Topics - Manifund ↩
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Mantic Monday 3/14/22 - Astral Codex Ten — Mantic Monday 3/14/22 - Astral Codex Ten ↩
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Clairvoyance: Forecasting AI Progress - Arb Research — Clairvoyance: Forecasting AI Progress - Arb Research ↩
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Forecasting and Prediction - Alignment Forum — Forecasting and Prediction - Alignment Forum ↩
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Hurdles to Using Forecasting to Forecast AI - Nuño Sempere — Hurdles to Using Forecasting to Forecast AI - Nuño Sempere ↩
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Polymarket Raises $2B at $9B Valuation - Insights4VC — Polymarket Raises $2B at $9B Valuation - Insights4VC ↩
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ICE Announces Strategic Investment in Polymarket — ICE Announces Strategic Investment in Polymarket ↩
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Polymarket Raises $2B at $9B Valuation - Insights4VC — Polymarket Raises $2B at $9B Valuation - Insights4VC ↩
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Polymarket Raises $2B at $9B Valuation - Insights4VC — Polymarket Raises $2B at $9B Valuation - Insights4VC ↩
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Polymarket Raises $2B at $9B Valuation - Insights4VC — Polymarket Raises $2B at $9B Valuation - Insights4VC ↩
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What is Polymarket? - Atomic Wallet — What is Polymarket? - Atomic Wallet ↩
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Polymarket Betting Contract Manipulation - Binance Square — Polymarket Betting Contract Manipulation - Binance Square ↩
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Polymarket Betting Contract Manipulation - Binance Square — Polymarket Betting Contract Manipulation - Binance Square ↩
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Polymarket Betting Contract Manipulation - Binance Square — Polymarket Betting Contract Manipulation - Binance Square ↩
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Polymarket Betting Contract Manipulation - Binance Square — Polymarket Betting Contract Manipulation - Binance Square ↩
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Polymarket Betting Contract Manipulation - Binance Square — Polymarket Betting Contract Manipulation - Binance Square ↩
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Polymarket Betting Contract Manipulation - Binance Square — Polymarket Betting Contract Manipulation - Binance Square ↩
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Polymarket Wash Trading - Fortune — Polymarket Wash Trading - Fortune ↩
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Polymarket Wash Trading - Fortune — Polymarket Wash Trading - Fortune ↩
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Polymarket Wash Trading - Fortune — Polymarket Wash Trading - Fortune ↩
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Polymarket Wash Trading - Fortune — Polymarket Wash Trading - Fortune ↩
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Polymarket Insider Trading Problem - Politico — Polymarket Insider Trading Problem - Politico ↩
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Rep. Ritchie Torres Introduces Legislation on Prediction Markets - Ritchie Torres — Rep. Ritchie Torres Introduces Legislation on Prediction Markets - Ritchie Torres ↩
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Polymarket Insider Trading - Fortune — Polymarket Insider Trading - Fortune ↩
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Polymarket Insider Trading Problem - Politico — Polymarket Insider Trading Problem - Politico ↩
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Polymarket Insider Trading - Fortune — Polymarket Insider Trading - Fortune ↩
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Polymarket Insider Trading Problem - Politico — Polymarket Insider Trading Problem - Politico ↩
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Polymarket Users Unprofitable - CryptoRank — Polymarket Users Unprofitable - CryptoRank ↩
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Polymarket Users Unprofitable - CryptoRank — Polymarket Users Unprofitable - CryptoRank ↩
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Polymarket Users Unprofitable - CryptoRank — Polymarket Users Unprofitable - CryptoRank ↩
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Polymarket Users Unprofitable - CryptoRank — Polymarket Users Unprofitable - CryptoRank ↩
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Polymarket Being Banned in More Countries - Trending Topics — Polymarket Being Banned in More Countries - Trending Topics ↩
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Polymarket Being Banned in More Countries - Trending Topics — Polymarket Being Banned in More Countries - Trending Topics ↩
References
View claims1Rep. Ritchie Torres Introduces Legislation on Prediction Markets - Ritchie Torresritchietorres.house.gov·Government▸
“Today, Rep. Torres is officially introducing the Public Integrity in Financial Prediction Markets Act of 2026 into the U.S. House of Representatives.”
The claim mentions that Representative Dina Titus requested information from Polymarket CEO Shayne Coplan, but this is not mentioned in the source. The source only mentions that Dina Titus co-sponsored the bill. The claim states that Ritchie Torres called the insider trading-government nexus "corrupting," but the source quotes him calling it "the most corrupt corner of Washington, D.C."
“Our study reveals two distinct forms of arbitrage on Polymarket: Market Rebalancing Arbitrage, which occurs within a single market or condition, and Combinatorial Arbitrage, which spans across multiple markets. We use on-chain historical order book data to analyze when these types of arbitrage opportunities have existed, and when they have been executed by users. We find a realized estimate of 40 million USD of profit extracted.”
The study was submitted on August 5, 2025, so the estimated arbitrage profits could not have been extracted between April 2024 and April 2025. The study estimates 40 million USD of profit extracted, not approximately $40 million.
“Polymarket is the world’s largest prediction market, allowing you to stay informed and profit from your knowledge by betting on future events across various topics.”
“Arguments for further growth include two paths: a traditional IPO, which could attract institutional investors and ensure regulatory stability; or launching its own token (like $POLY), which would give the community tools for governance, staking, and rewards.”
unsupported: premium features and expanded data monetization wrong_number: $3.3 billion wagered during the 2024 election cycle overclaims: platform's growth trajectory remains tied to high-volume events
“Polymarket is a decentralized prediction market built on Polygon , where users trade outcomes of real-world events using crypto — like “Who will win the U.S. election?” or “Will Bitcoin hit $150K by December?”. You buy shares in an outcome with USDC , and when the result is confirmed by on-chain oracles like Chainlink, the winning side’s shares pay out $1 each.”
The claim that Polymarket is the world's largest prediction market platform is an overclaim, as the source does not explicitly state this. The claim that share prices range between $0.00 and $1.00 is not explicitly stated in the source, although it is implied. The claim that a 20-cent YES share indicates an 18-20% chance of the event occurring is not explicitly stated in the source, although it is implied. The source mentions a $1.4 million CFTC fine in 2022, which is not mentioned in the claim.
“Polymarket is a decentralized prediction market built on Polygon , where users trade outcomes of real-world events using crypto — like “Who will win the U.S. election?” or “Will Bitcoin hit $150K by December?”. You buy shares in an outcome with USDC , and when the result is confirmed by on-chain oracles like Chainlink, the winning side’s shares pay out $1 each.”
The claim that Polymarket operates as a non-custodial protocol is not explicitly stated in the source. The source states that Polymarket is a decentralized prediction market built on Polygon, where users trade outcomes of real-world events using crypto. The claim that YES and NO shares for any event are fully collateralized by $1.00 USDC is not explicitly stated in the source. The source states that you buy shares in an outcome with USDC, and when the result is confirmed by on-chain oracles like Chainlink, the winning side’s shares pay out $1 each.
“Prediction markets provide unbiased and accurate probabilities in real time, cutting through the noise of human and media biases.”
unsupported: The source does not mention Shayne Coplan as the founder of Polymarket. unsupported: The source does not provide any data on the prediction accuracy of Polymarket, such as exceeding 90% one month before event resolution.
“Market Prices = Probabilities: The price of shares in a prediction market represents the current probability of an event happening. For example, if shares of an event are trading at 20 cents, it indicates a 20% chance of that event occurring.”
The source does not mention that Polymarket operates as a non-custodial protocol. The source does not mention that YES and NO shares for any event are fully collateralized by $1.00 USDC. The source does not mention that payouts are confirmed by oracles like Chainlink after events resolve.
“Polymarket is very accurate, over 90% accurate even a month before the markets close.”
unsupported: The claim that Polymarket positions itself as providing accurate, unbiased, and real-time probabilities for significant events by leveraging prediction markets where participants are financially incentivized to forecast truthfully is not directly stated in the source. unsupported: The claim that the platform emphasizes global, anonymous, transparent trading where prices adjust in real-time based on supply, demand, and new information is not directly stated in the source. minor_issues: The claim states that research shows Polymarket achieves prediction accuracy exceeding 90% even one month before event resolution, while the source states that Polymarket is over 90% accurate even a month before the markets close.
“Polymarket is very accurate, over 90% accurate even a month before the markets close. The accuracy gets higher the closer you get to the market resolution, with a few exceptions that we can discuss.”
“The 2024 U.S. elections marked another defining period for Polymarket, driving a staggering 48x surge in trading volume.”
WRONG NUMBERS: The source does not state that Polymarket processed over $8 billion in predictions during 2024 alone. It states that Polymarket reached an $8 billion valuation as of October 2025. WRONG NUMBERS: The source does not mention monthly volumes exceeding $13.5 billion. WRONG NUMBERS: The source does not mention 43 million transactions by November 2025.
“The 2024 U.S. elections marked another defining period for Polymarket, driving a staggering 48x surge in trading volume.”
The source does not mention the specific amount of predictions made during 2024, only that there was a 48x surge in trading volume. The source does not mention research published in May 2024 that found Polymarket outperformed traditional polling in predicting the election outcome, particularly in swing states, adjusting dynamically to real-world events like assassination attempts and debate performances while polling remained relatively static.
“1. Polymarket beat legacy institutions at processing information, in real time and in general.”
The source only mentions Polymarket beating legacy institutions in the context of the 2024 US election, not generally. The source does not mention Effective Altruism communities.
“1. Polymarket beat legacy institutions at processing information, in real time and in general. 2. The OG prediction markets community, the community which has been betting on politics and increasing their bankroll since PredictIt, was on the wrong side of 50%—1, 2, 3, 4, 5. It was the democratic, open-to-all nature of it, the Frenchman who was convinced that mainstream polls were pretty tortured and bet ~$45M, what moved Polymarket to the right side of 50/50.”
Failed to parse LLM response
“Data sales begin with the ICE partnership announced in Oct 2025, selling market data to institutions.”
Incorrect year: The article states the ICE partnership was announced in October 2025, not January 2026. Unsupported: The article does not mention a Dow Jones partnership or exclusive Wall Street Journal integration.
“The most headline-grabbing deal came in October 2025 , when Intercontinental Exchange (ICE) , the Fortune 500 company that owns the NYSE, announced plans to invest up to $2 billion in Polymarket for a minority stake. This strategic financing is at a pre-money valuation of $8 billion , implying a post-money valuation as high as $10 billion if the full $2B is invested.”
The claim that Polymarket outperformed traditional polling is not directly supported by the source. The source mentions Polymarket's notoriety during the 2020 election cycle and integration of its real-time odds into mainstream financial data outlets like Bloomberg, but it does not explicitly state that Polymarket outperformed traditional polling. The claim that a single bettor wagered approximately $45 million against mainstream polls is not supported by the source. The strategic investment from Intercontinental Exchange (ICE) occurred in October 2025, valuing the company at $8 billion pre-money, implying a post-money valuation as high as $10 billion if the full $2B is invested. The claim states the valuation at $8-9 billion.
“In May 2024 , Polymarket raised $45 million in a Series B round. By this time, Polymarket’s valuation had climbed significantly; although exact figures weren’t announced, industry chatter put it in the $500–600 million range post-money in mid-2024.”
Failed to parse LLM response
“The story of Polymarket begins in 2020 with its founder, Shayne Coplan, a New York native.”
The source does not mention Coplan launching the platform from a "makeshift bathroom office" in his Lower East Side apartment. The source does not mention the platform operating under names like Union.market or Blockratize, Inc.
“Seed Funding: The company secured a seed round in October 2020, raising $4 million, led by Polychain Capital.”
The source does not mention Coplan's vision to "democratize foresight".
“In May 2024, a $25 million Series A round led by General Catalyst and a $45 million Series B round spearheaded by Founders Fund, with participation from Vitalik Buterin, were completed, totaling $70 million. By July 2024, the platform recorded $387 million in monthly trading volume, more than tripling its previous high.”
The Series B round was for $45 million, not $50 million as stated in the claim. The claim mentions the Series B round in October 2024, but the source does not specify the month.
“Polymarket is a New York-based cryptocurrency prediction market platform founded in 2020 that enables users to buy and sell shares tied to the outcome of future events.”
The source does not mention Coplan being a New York University dropout. The source does not mention Coplan launching the platform from a "makeshift bathroom office" in his Lower East Side apartment. The source does not mention Polymarket initially operating under names like Union.market or Blockratize, Inc.
“So he stopped his busy entrepreneurial pace and began to concentrate on reading: academic papers, obscure research reports, and especially the research results of economist Robin Hanson on "prediction markets."”
The claim that Coplan aimed to create a blockchain-based platform on the Polygon network is not explicitly stated in the source. The source only mentions that Polymarket is a prediction market platform where users use cryptocurrency to bet on the outcomes of real-world events. The source does not explicitly state that the platform was created to counter misinformation.
“In October 2025, the long-awaited news finally came: Intercontinental Exchange (ICE), the parent company of the New York Stock Exchange, invested $2 billion in Polymarket at a pre-investment valuation of $8 billion.”
The source states that the investment was made at a pre-investment valuation of $8 billion, not an $8-9 billion valuation. The source does not explicitly state that Polymarket is 'one of the most valuable prediction market platforms globally,' only implying it through the investment size and partnership.
“In July 2025, Polymarket acquired QCEX, a CFTC-regulated derivatives exchange and clearinghouse.”
WRONG DOLLAR AMOUNT: The source does not state that Polymarket acquired QCEX for $112 million. It only states that Polymarket acquired QCEX.
“Founded in 2020 by Shayne Coplan, the company is based in New York City .”
The source does not mention Coplan's vision to "democratize foresight". The source does not mention Polymarket raising $4 million in seed funding led by Polychain Capital.
“A September 2025 CFTC no-action relief letter—essentially a written assurance that the agency would not pursue enforcement if Polymarket met certain conditions—gave Polymarket the green light to launch U.S. operations.”
“Their terms of use now prohibit users from the US from participating on the platform, and likewise prohibits use of a VPN to circumvent this prohibition ( a ).”
The claim refers to 'users' in general, but the source specifies 'users from the US'. The claim states that 'enforcement remained weak', but the source does not explicitly state this.
18What Five Academic Papers Say About Prediction Markets - Next Event Horizonnexteventhorizon.substack.com·Blog post▸
“However, even with the increased uncertainty due to the random-walk-like structure of the Polymarket data, overall predictions are more accurate than those of the polling data.”
The claim mentions 'ETH Zürich thesis analyzing over 2 million buy/sell transactions across 9,026 markets' but the source does not mention the specific details of the thesis, such as the university or the number of transactions and markets analyzed. The source only mentions the titles, authors, and abstracts of the papers. The claim states 'average Brier score of approximately 0.15, indicating strong accuracy' but the source does not mention the Brier score or the level of accuracy. The claim refers to the '2024 presidential election' but the source refers to the '2024 election cycle'.
“Overall, findings suggest that Polymarket was superior to polling in predicting the outcome of the 2024 presidential election, particularly in swing states.”
Failed to parse LLM response
“Under the terms of the agreement, ICE will invest up to $2 billion in Polymarket, reflecting a valuation of approximately $8 billion pre-investment.”
unsupported: Key investors include Polychain Capital (seed lead), Founders Fund (associated with Peter Thiel), and Vitalik Buterin (Ethereum co-founder). wrong_numbers: The October 2025 ICE investment represents the largest single investment and came with a strategic data distribution partnership. The source states that ICE will invest up to $2 billion in Polymarket.
“Under the terms of the agreement, ICE will invest up to $2 billion in Polymarket, reflecting a valuation of approximately $8 billion pre-investment. Alongside its investment, ICE will become a global distributor of Polymarket’s event-driven data, providing customers with sentiment indicators on topics of market relevance.”
“Three months ago, Coplan named Donald Trump Jr. – already an advisor to Kalshi – to Polymarket's advisory board. And Trump Jr.'s 1789 Capital fund invested around $10 million in the company.”
The source does not mention the trading volume of $10 billion in November 2025. The source says that Trump Jr.'s 1789 Capital fund invested 'around' $10 million, not 'approximately' $10 million.
“In November 2025, Kalshi and Polymarket collectively recorded nearly 10 billion dollars in trading volume, marking the most active month in the history of the sector.”
unsupported: The source does not mention that someone joined Polymarket's advisory board via their 1789 Capital fund. unsupported: The source does not mention that 1789 Capital fund invested approximately $10 million in the platform. wrong_numbers: The source states that Kalshi and Polymarket collectively recorded nearly $10 billion in trading volume in November 2025, not that Polymarket alone had $10 billion in trading volume.
“Soccer United Marketing (SUM), the commercial arm of Major League Soccer (MLS), today announced a new multi-year partnership with Polymarket, the world’s largest prediction market, naming the company an Official Partner of Major League Soccer and an Official Partner of Leagues Cup in the United States.”
The source only mentions partnerships with Major League Soccer (MLS) and Leagues Cup. It does not mention partnerships with the New York Rangers, UFC and Zuffa Boxing, PrizePicks, or X (formerly Twitter). The date for the MLS and Leagues Cup partnership announcement is accurate (January 26, 2026). The source does not mention Polymarket odds integration with Grok analysis and X posts.
“Polymarket, the world's largest prediction market, and 𝕏 today announced an official partnership through which Polymarket will serve as the official Prediction Market Partner to 𝕏.”
“On the same day, the Nevada Gaming Control Board filed a civil enforcement action and sought a court injunction to prevent Polymarket from offering unlicensed bets. These steps follow a similar action in Tennessee in early January, where the state sports betting regulator instructed Polymarket, Kalshi, and Crypto.com to shut down their sports prediction markets and refund wagers.”
The source does not specify that the Nevada Gaming Control Board injunction and Tennessee shutdown orders occurred in early 2025. The source only mentions that the Tennessee action occurred in early January. The source mentions a temporary ban in Hungary, but does not specify that Polymarket expanded internationally. The source mentions that France has restrictions, but does not ban Polymarket.
“On the same day, the Nevada Gaming Control Board filed a civil enforcement action and sought a court injunction to prevent Polymarket from offering unlicensed bets. These steps follow a similar action in Tennessee in early January, where the state sports betting regulator instructed Polymarket, Kalshi, and Crypto.com to shut down their sports prediction markets and refund wagers.”
The claim states the Tennessee Sports Wagering Council issued the cease-and-desist order in January 2026, but the source only says "early January". The claim states Hungary has temporarily banned the platform, but the source says the ban in Hungary is initially temporary.
“97.0% 4 hr accuracy 91.2% 1 month accuracy 0.0832 Brier Score Accuracy prior to resolution Shows how accurate Polymarket odds were at different points before they resolved. 4 Hrs 97 % 12 Hrs 96.6 % 1 Day 96.1 % 1 Week 94.4 % 1 Month 91.2 % 4 Hrs 97 % 12 Hrs 96.6 % 1 Day 96.1 % 1 Week 94.4 % 1 Month 91.2 % Expected vs Actual Polymarket forecasts closely align with actual outcomes across all probability ranges.”
“Long-term predictions carry more uncertainty, as they rely on incomplete data and are more vulnerable to speculation and external variables.”
The source does not state that the platform tends to overestimate probabilities by approximately 2 points across ranges. It provides accuracy percentages at different timeframes before market resolution. The claim mentions 'NFL games' as an event type, but the source only mentions 'sports' generally.
“But Polymarket has the same problem: It shouldn’t be able to have technical issues like Metaculus, so what’s up?”
The source does not mention Arb Research proposing Polymarket-compatible questions for AI safety tournaments focusing on AI benchmarks. The source mentions technical issues with both Metaculus and Polymarket, but not specifically during high-stakes events like the Ukraine conflict.
“Online discussion on lesswrong.com, that typically assumes things like: intelligence gains would be fast and explosive, that we should aim to design a mathematical construction that guarantees safety, that iteration would not be advisable in the face of fast intelligence gains, etc.”
The claim mentions 'top users lacking transparent records' on LessWrong, but the source doesn't explicitly state this. It only mentions online discussion on lesswrong.com. The claim mentions 'frustrations about discourse quality on the EA Forum regarding these applications', but the source doesn't mention the EA Forum at all.
“Polymarket reinforced a leading market position in 2025 by locking in a $2 billion primary funding round at a reported $9 billion valuation , making it one of the largest global fintech rounds of the year. The company is now pursuing an additional raise at a targeted $12–15 billion valuation signaling strong investor conviction versus other fintech subsectors.”
The claim mentions a specific stock price of $144.64 per share as of January 30, 2026, which is not found in the provided source text. The claim mentions 36 live orders, which is not found in the provided source text.
“Furthermore, an exclusive January 2026 partnership with Dow Jones integrates Polymarket data modules across The Wall Street Journal and other digital properties, cementing the platform’s role as a primary source for real-time, market-implied probability in global news reporting.”
The claim mentions 'ICE partnership initiated data sales', but the source doesn't explicitly mention ICE (Intercontinental Exchange) as a partner. It only mentions a partnership with Dow Jones. The claim mentions 'Polymarket providing institutional feeds of event-driven data for sentiment analysis', but the source doesn't explicitly mention 'sentiment analysis'. The claim states 'In January 2026, the company announced a Dow Jones partnership for exclusive Wall Street Journal integration', but the source states 'an exclusive January 2026 partnership with Dow Jones integrates Polymarket data modules across The Wall Street Journal and other digital properties'.
“Broader regulatory and political scrutiny of prediction markets is intensifying, with New York and other jurisdictions debating whether platforms like Polymarket should be regulated more like gambling venues than financial markets, and with legal experts highlighting that ongoing federal and state court cases could ultimately reach the U.S. Supreme Court.”
“Polymarket Last Round Details Date October 2025 (Later Stage VC) Capital Raised $2b of $2.26b total”
WRONG NUMBERS: The source states the price is $148.07, not $144.64. WRONG NUMBERS: The source states there are 30 live orders, not 36. UNSUPPORTED: The source does not mention a funding round targeting a $12-15 billion valuation as of late 2025.
“While wash trading may have accounted for around 60% of all Polymarket trading last December, it subsided to around 5% in May of this year before rising again to about 20% in early October, according to the study.”
“The practice can give the appearance of generating real volume and may impact pricing, but it generally doesn’t reflect real market sentiment.”
“Polymarket, the blockchain-based company, has a different screen: It bans all U.S. users from betting on its site, insiders and outsiders alike. However, it’s not hard to use a VPN to obscure your true location, and many U.S. traders do. Polymarket’s terms of service also ban market manipulation. Polymarket declined to comment on the record for this story.”
wrong_numbers unsupported
“It helps explain why splashy investors in Polymarket and its chief competitor, Kalshi, include Peter Thiel, Donald Trump Jr., and Marc Andreesen.”
The claim states that libertarians view insider trading as a feature that surfaces information faster than traditional media. The source does not explicitly state this, but it does mention that the rise of prediction markets has been welcomed by politically minded techno-libertarians who are frustrated with what they perceive to be biased media and faulty polls. The claim states that suspicions persist among the political class. The source supports this. The claim states that Republican investors including Peter Thiel, Donald Trump Jr., and Marc Andreessen support prediction markets. The source supports this, but the source does not explicitly state that they are Republican investors.
“Prediction platforms pitch themselves as tools for insight, but eye-catching bets on real-world events are raising questions about access, integrity and regulation.”
“The controversy comes as courts and regulators struggle to define rules for prediction markets, which have exploded in popularity, with Polymarket netting a $9 billion valuation late last year.”
The claim that 'enforcement is weak (easily circumvented via VPNs)' is not explicitly stated in the source. The valuation is stated as $9 billion in the source, not $9 billion.
“Many Democrats disagree, including Rep. Ritchie Torres (D-NY), who on Friday introduced a bill that would crack down on government employees’ ability to use the platforms. “The intersection of insider trading and government decision making is not only corrupting to the market, it’s corrupting the government itself,” Torres told Fortune in an interview. On Friday, his colleague Rep. Dina Titus (D-Nev.) sent a letter to Polymarket’s Coplan requesting more information on his platform’s safeguards to prevent insider trading.”
“The core findings, based on an exhaustive on-chain analysis of approximately 1.7 million unique addresses, present a clear yet troubling picture. Only about 30% of all Polymarket participants have managed to exit trades with a net gain. However, this headline figure masks an even more dramatic concentration of wealth. A minuscule fraction of users—fewer than 0.04% of all addresses—captured over 70% of the total realized profits, which sum to a colossal $3.7 billion. Simply earning over $1,000 placed an address in the top 4.9% of all Polymarket users, highlighting how rare significant gains are for the general participant base. The analysis also provided context on losses, noting that large-scale financial disasters were relatively uncommon, with just over 140 addresses suffering losses exceeding $1 million.”
“This level of inequality suggests that while the platform facilitates massive value transfer, the benefits are hyper-concentrated among a handful of sophisticated or fortunate players.”
Polymarket is an online prediction market where users can trade probabilistic outcomes for events ranging from politics to entertainment. The platform allows participants to bet on speculative scenarios and provides real-time probability estimates.