Polymarket Unveils Stricter Integrity Rules Across DeFi and CFTC Venues

Polymarket, the world’s largest prediction market, has updated its market integrity rules across both its decentralized finance (DeFi) platform and its U.S. exchange regulated by the Commodity Futures Trading Commission (CFTC). The changes aim to clarify expectations for participants and reinforce the platform’s commitment to preventing market manipulation and insider trading.

The updated rules now explicitly prohibit trading based on stolen confidential information, trading using unlawfully obtained inside information, and trading by individuals who can influence the outcome of events. These prohibitions apply to both the offshore and U.S.-regulated parts of Polymarket’s operations.

The platform has also launched dedicated Market Integrity pages to explain the rules and provide users with tools to report suspicious activity. These updates are part of a broader effort to ensure transparency and maintain the fairness of its markets.

Why Did This Happen?

The regulatory environment for prediction markets has grown more complex as platforms like Polymarket and Kalshi have attracted significant trading volumes, including in sports-related contracts. Concerns over insider trading and market manipulation have intensified, prompting the need for clearer rules. Polymarket’s Chief Legal Officer, Neal Kumar, emphasized that these updates highlight the platform’s existing compliance infrastructure and make expectations clearer for participants.

The move follows increased scrutiny from regulators and calls for more oversight from traditional financial institutions. For example, Point72 and Balyasny have banned employees from trading on prediction markets in their personal accounts due to compliance risks.

How Do the New Rules Work in Practice?

The updated rules are now incorporated into the DeFi platform’s Terms of Use and the Polymarket US Rulebook. This includes specific prohibitions on three categories of insider trading: trading on stolen confidential information, trading on illegal tips, and trading by individuals who can influence event outcomes.

Polymarket employs a multi-layered surveillance system and partners with technology specialists to ensure compliance. The platform also benefits from blockchain-based transparency, as all trades are executed on the Polygon blockchain.

What Are Analysts Watching Next?

The broader regulatory landscape is shifting, with senators like Adam Schiff and John Curtis proposing a bill to ban sports betting and “casino-style” contracts from CFTC-regulated prediction markets. This would shift oversight of these contracts to state regulators, adding another layer of complexity to the market structure.

Fidelity has also called on the SEC to establish a clear regulatory framework for cryptocurrency trading, including the use of Alternative Trading Systems. This highlights the growing demand for clarity from major financial institutions. Meanwhile, traditional Wall Street firms are reevaluating their policies as prediction markets expand into financial events like corporate earnings and economic data.

The Investment Adviser Association has seen increased interest in understanding the compliance and regulatory implications of prediction markets. Legal experts suggest that traditional standards—such as fraud and fiduciary duty—still apply, but the infrastructure for monitoring and enforcing these rules remains underdeveloped.

As prediction markets evolve, the balance between innovation and regulation will continue to be a key focus for investors and institutions alike.