Kalshi, Polymarket Tighten Rules to Curb Insider Trading

TheNewsCryptoPublished on 2026-03-24Last updated on 2026-03-24

Abstract

Kalshi and Polymarket, two major prediction market platforms, are implementing new rules to combat insider trading and market manipulation amid increasing regulatory scrutiny. Kalshi has introduced new screening tools to prevent individuals, including elected officials and those in sports (athletes, coaches, referees), from trading on events they are involved in. The platform is shifting from a reactive enforcement approach to a more proactive one and has added a feature for users to report suspicious activity directly. Similarly, Polymarket has updated its policies to explicitly prohibit trading on stolen information, illegal tips, and by individuals who can influence an event's outcome. It has also broadened its rules against market abuse like spoofing and wash trading. Both platforms are enhancing surveillance, aligning more closely with traditional financial market standards due to concerns about manipulation in prediction markets.

Prediction market platforms Kalshi and Polymarket have planned to launch new rules to curb insider trading and market manipulation as regulatory pressure from Capitol Hill boosts.

The March 23 blog post includes the statement of Kalshi, which mentions that it has rolled out new screening tools to block potential candidates from trading on their own elections, widening current restrictions that so far apply to elected officials.

The platform is also executing a new policy aiming at sports-aimed markets, leveraging screening lists advanced with integrity overlooking company IC360 to prevent athletes, coaches, referees, and other insiders from trading on events they are involved in.

While activities like these are so far restricted, Kalshi mentioned enforcement has widely been reactive, needing scrutiny after trades were placed. Kalshi also featured a prominent feature embedded directly into its trading interface, permitting users to report suspicious activity more swiftly.

Kalshi’s enforcement and legal counsel, Bobby DeNault, mentioned these rules have been in advancement for months to “proactively address” guidance from the Commodity Futures Trading Commission and a congressional proposal to avoid insider trading.

Polymarket’s Statement

At the same time, Polymarket mentioned on March 23 that it has upgraded its governing document over its decentralised platform as well as its CFTC-regulated U.S. exchange, rolling out clearer rules surrounding insider trading and enforcement.

To be specific, Polymarket highlighted three main categories of restricted conduct: trading on stolen confidential information, trading on illegal tips, and trading by individuals who can directly impact the result of an event.

It also widened limitations on wider forums of market abuse, comprising spoofing, wash trading, and front-running. As per the statement of March 23, Polymarket leverages multi-layered surveillance over its DeFi and U.S. platforms, amalgamating on-chain transparency and third-party monitoring to recognise breaches.

The updates show a wider industry push to line up more closely with traditional financial market standards, as policymakers raised concerns that prediction markets, specifically those associated with politics and sports, could be vulnerable to manipulation.

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