Catenaa, Friday, March 27, 2026- Prediction market platforms Kalshi and Polymarket have introduced new controls to curb insider trading and market manipulation, as U.S. lawmakers intensify scrutiny over event-based trading tied to politics and sports.
Kalshi said it has deployed screening tools to block political candidates from trading on their own elections, expanding restrictions that already apply to elected officials. The platform is also introducing safeguards in sports-related markets, using monitoring lists developed with integrity firm IC360 to prevent athletes, coaches and referees from placing trades on events they influence.
The company added that enforcement had previously been reactive, relying on investigations after trades were executed. A new whistleblower feature embedded in its trading interface now allows users to report suspicious activity directly.
Polymarket said it has updated its rules across both its decentralized platform and its CFTC-regulated U.S. exchange. The changes define prohibited conduct, including trading on confidential information, acting on illegal tips, and participation by individuals able to influence outcomes. The platform also expanded restrictions to include spoofing, wash trading and front-running.
The updates follow increasing attention from regulators and lawmakers concerned that prediction markets could be vulnerable to manipulation, particularly in politically sensitive or sports-related contracts. Both platforms have grown rapidly, handling billions in monthly trading volume and drawing a wider user base beyond early crypto adopters.
Regulators have been refining oversight of event contracts in recent years, with the Commodity Futures Trading Commission issuing guidance on risks tied to contracts involving player injuries, misconduct and other outcomes that could incentivize interference.
The tighter controls signal an effort by the industry to align more closely with standards used in traditional financial markets. Proactive monitoring tools, clearer rules and enhanced reporting systems could reduce the risk of manipulation and improve trust among participants.
At the same time, stricter enforcement may limit participation by certain groups and introduce additional compliance costs for platforms. The balance between open access and regulatory safeguards remains a central challenge as the sector expands.
Market observers say the changes reflect a broader shift toward institutional-grade compliance in prediction markets. Analysts note that as trading volumes increase, platforms face greater pressure to demonstrate robust safeguards against abuse.
Some experts argue that clear enforcement frameworks will be critical for long-term growth, particularly if prediction markets seek deeper integration with regulated financial systems. Others caution that ongoing legislative proposals could still reshape the sector’s structure.
Prediction markets began as academic forecasting tools in the late 1980s and have since grown into large-scale platforms blending finance and data-driven prediction. The sector surged during the 2024 U.S. elections, with billions in trading volume demonstrating the effectiveness of market-based forecasting. By early 2026, cumulative trading volumes reached more than $127 billion, driven by contracts tied to elections, economic indicators and global events.
Regulatory developments have played a central role in shaping the industry. Kalshi became the first federally approved Designated Contract Market for event contracts, while Polymarket reentered the U.S. market after earlier enforcement actions. Despite rapid growth, the sector continues to face legal scrutiny from state authorities and federal regulators over its overlap with gambling laws and potential for market abuse.
