Representative Bryan Steil has introduced a bill to prohibit members of Congress, along with their spouses and dependents, from placing bets on political prediction markets. The proposal, titled the Stop Lawmakers from Predicting Act, targets wagers tied to government actions or policy outcomes, aiming to curb potential misuse of nonpublic information.
Lawmakers who violate the ban would face fines of about $2,000 or 10 percent of the trade’s value, whichever is higher, and would be required to forfeit any profits. The measure builds on existing restrictions such as the Stop Insider Trading Act, which already limits stock trading by members of Congress and their families.
Growing concern over insider advantage
The push for tighter rules comes as prediction platforms like Kalshi and Polymarket have seen a sharp rise in activity. Regulators and lawmakers are increasingly concerned that traders with access to sensitive information could gain an unfair edge in these markets.
Scrutiny intensified earlier this year after a U.S. Army soldier, Gannon Ken Van Dyke, was arrested for allegedly using confidential information to place a wager exceeding $400,000 on the potential removal of Venezuelan President Nicolás Maduro. The case highlighted how insider knowledge could intersect with speculative betting markets.
In May, the Senate approved its own restrictions banning members from participating in prediction-market trading, signaling broader bipartisan momentum on the issue.
Regulators and platforms tighten oversight
Federal oversight is also expanding. The Commodity Futures Trading Commission has proposed rules that would allow it to block prediction contracts deemed vulnerable to manipulation or contrary to the public interest.
At the same time, platforms are strengthening internal controls. Kalshi now requires users to disclose their employers before trading in high-risk markets and reported opening more than 150 investigations in the first quarter of 2026. The company has also taken action against political candidates who placed bets on their own races. Polymarket has updated its policies to explicitly prohibit trading on information that violates duties of trust, even if obtained indirectly.
Rapid market growth draws attention
The regulatory push coincides with explosive growth in prediction markets. Monthly global trading volume has climbed from under $5 billion in September 2025 to around $24 billion by April 2026. Analysts project total volume could reach $240 billion this year, with some forecasts suggesting the market may surpass $1 trillion by 2030.
Shift toward stricter enforcement
The combination of new legislation, regulatory proposals, and platform-level controls signals a shift toward tighter oversight. Increased identity verification and monitoring are expected, especially in markets tied to political and economic outcomes.
Taken together, these developments point to a shrinking window for traders seeking to benefit from privileged information. Authorities and platform operators are moving in tandem to limit informational advantages, reshaping how these markets function and how participants engage with them.
For deeper insight into prediction platforms and regulation, explore our guide on prediction markets and costly mistakes now.
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