Kalshi and Polymarket Crack Down on Insider Trading as U.S. Lawmakers Move to Ban Prediction Markets

Prediction market platforms Kalshi and Polymarket are tightening restrictions on insider trading as U.S. lawmakers push new legislation that could significantly limit or even ban key parts of their business models. The move comes after growing concerns that users have profited from non-public information on major global events, raising questions about whether prediction markets are operating as financial tools—or unregulated gambling platforms.

Insider Trading Concerns Trigger New Rules

Both platforms are implementing stricter safeguards to prevent market manipulation and misuse of privileged information.

New restrictions include:

• Banning political candidates from trading on their own campaigns
• Blocking athletes, coaches, and sports personnel from betting on related events
• Prohibiting users with access to confidential or market-moving information
• Adding surveillance and monitoring tools to detect suspicious activity

These changes come after multiple incidents where traders appeared to profit from early knowledge of geopolitical and military events.

Lawmakers Push to Ban Key Markets

At the same time, U.S. senators are introducing legislation that could dramatically reshape the industry.

Proposed actions include:

• Banning prediction markets from offering sports-related contracts
• Expanding definitions of gambling to include event-based trading
• Increasing federal oversight of platforms regulated by the CFTC

The proposed “Prediction Markets are Gambling Act” could severely impact both companies, especially as sports betting has become a major driver of growth.

Prediction Markets Face Growing Scrutiny

Regulators and critics argue these platforms blur the line between investing and gambling.

Key concerns include:

• Users betting on real-world events like wars, elections, and sports
• Allegations of insider trading tied to political and military developments
• States claiming these platforms operate as unlicensed sportsbooks
• Ethical concerns around profiting from global crises

Several states have already moved to restrict or ban these platforms, citing consumer protection risks.

CFTC Support Creates Regulatory Tension

Despite state-level pushback, federal regulators are taking a different stance.

Key dynamics:

• The Commodity Futures Trading Commission supports prediction markets under federal law
• Federal oversight may override state-level gambling bans
• Ongoing legal battles could determine the future of the industry

This has created a conflict between state regulators and federal authorities over who controls the space.

Political Ties Raise Additional Questions

The debate has also intensified due to political connections tied to the industry.

Notable developments:

• Ties between prediction market companies and figures linked to Donald Trump
• Concerns about potential conflicts of interest in regulatory decisions
• Increased scrutiny from both political parties

Bipartisan concern is growing as the industry continues to expand rapidly.

Why This Matters

This situation highlights a major turning point for prediction markets:

• Insider trading risks are forcing platforms to tighten controls
• New legislation could reshape or restrict the entire industry
• The line between gambling and financial markets is being challenged
• Regulatory battles between states and federal agencies are intensifying

As prediction markets grow in popularity, the outcome of this regulatory fight could determine whether they become a mainstream financial tool—or face major limitations in the U.S.