TLDRPolymarket updated its market integrity rules to address manipulation and insider trading risks.The company introduced stricter market design standards and clearer resolution criteria for contract outcomes.Polymarket enhanced surveillance systems to detect suspicious trading activity across its platforms.The platform banned and reported users who pressured a journalist over a $17 million prediction market.Reports showed that six newly created accounts earned about $1 million from bets on US strikes on Iran.Polymarket updated its market integrity rules to address manipulation and insider trading risks. The company announced stricter standards for market design and resolution criteria on Monday. It also expanded surveillance controls as regulators increase scrutiny of event-based contracts.Polymarket Updates Market Standards and Compliance FrameworkPolymarket said it aligned its global platform rules with regulatory standards, and it strengthened oversight on its US exchange. The US platform operates under Commodity Futures Trading Commission compliance, and the company confirmed tighter monitoring systems. It stated that clearer resolution criteria and defined data sources will govern contract outcomes.Today we're publishing new market integrity rules across our CFTC-regulated US exchange & DeFi platform — making clear what's prohibited, how we enforce rules, & how to report suspicious activity.The World's Largest Prediction Market runs on transparencyhttps://t.co/dWr23zcki6— Polymarket (@Polymarket) March 23, 2026The company said it will limit markets that it considers easily manipulated or ethically sensitive, and it will restrict certain event contracts. It confirmed enhanced surveillance tools to detect suspicious trading patterns and insider activity. Polymarket said, “We are enhancing monitoring and surveillance measures to detect suspicious trading activity.”Enforcement Actions and Regulatory Scrutiny IntensifyPolymarket said it banned and reported users who pressured an Israeli journalist over coverage of an Iranian missile strike. The disputed article related to a $17 million prediction market tied to the strike. The company confirmed it acted after users issued death threats to influence reporting tied to contract outcomes.Bloomberg reported that six newly created accounts generated about $1 million in profits from bets on US strikes on Iran. All six accounts opened in February and placed wagers only on whether the strikes would occur. The trading activity raised questions about insider trading and market fairness.Several US states have taken action against prediction platforms, and they allege unlicensed gambling operations. Regulators have increased oversight as prediction markets expand across political and global events. Polymarket operates its US exchange under CFTC oversight, and it said it supports integrity protections.Growth Strategy and Partnership AgreementsPolymarket raised $200 million in July, and reports said it seeks a valuation of up to $10 billion. Prediction markets have attracted active traders who wager on political and economic outcomes. The company continues to expand its regulated presence while adjusting its compliance framework.Major League Baseball signed a partnership agreement with Polymarket, and the league confirmed the arrangement last week. The deal includes integrity protections, and it aligns with a separate agreement involving the CFTC. The agreements outline cooperation on monitoring and compliance standards for event-based contracts.Polymarket said the updated framework will apply to both its decentralized platform and its US exchange. The company confirmed that it will implement stricter data standards and clearer outcome definitions. Monday’s announcement detailed the new rules as the latest step in its compliance roadmap.The post Polymarket Updates Standards to Prevent Market Manipulation appeared first on Blockonomi.