U.S. House Passes Stop Insider Trading Act, Advancing Congressional Stock Purchase Ban to the Senate

The U.S. House of Representatives has passed the Stop Insider Trading Act, a measure that would bar members of Congress, their spouses, and dependent children from purchasing publicly traded stocks. The bill cleared the chamber in a 232–198 vote on Wednesday and was received in the Senate for consideration on Thursday. The initiative, which its sponsor says is designed to curb trading conflicts and deter misuse of nonpublic information, comes alongside a related effort aimed at preventing certain public officials from betting on prediction markets.

The Development

Representative Bryan Steil of Wisconsin, who sponsored the Stop Insider Trading Act, said the legislation “ensures no lawmaker can profit off of insider information” and “institutes strict penalties for any violation.” From the House floor, Steil described the penalty structure as “a fine equal to $2,000 or 10% of the transaction, as well as a disgorgement of profits. Violators would be forfeiting any gain realized if they failed to comply with this legislation.”

The bill targets the purchase of publicly traded equities by lawmakers and their immediate family members. It does not require liquidation of existing holdings. According to Steil, members of Congress who already own assets would be required to provide seven days’ notice before selling stocks. He characterized the notice requirement as a deterrent to insider trading and framed the bill’s floor vote as a rare opportunity to address the issue.

The House-approved measure now moves to the Senate, where its scope and enforcement mechanisms are likely to draw scrutiny. Steil’s proposal is limited to members of Congress and does not extend to the president, the vice president, or their families. In contrast, proposed text for the Digital Asset Market Clarity Act, a separate cryptocurrency market structure bill under consideration in the Senate, contemplates broader restrictions on public officials in a different context, including potential limits on the issuance or sponsoring of tokens until 2029.

Background and Context

The debate over congressional stock trading has intensified around questions of access to material nonpublic information and public confidence in markets. Supporters of restrictions argue that prohibiting purchases while allowing sales with advance notice can reduce the appearance of conflicts and limit opportunities to benefit from insider knowledge. In presenting the bill, Steil emphasized penalties and disgorgement to align incentives and reinforce compliance.

Some Democrats contend the measure stops short of addressing core conflicts because it permits lawmakers to retain and sell preexisting positions. They argue that continued ownership can still shape incentives and policymaking, even if new purchases are curtailed. The seven-day notice provision, while designed as a check on opportunistic selling, has also drawn questions about whether it adequately prevents trading based on time-sensitive information.

The House action arrives amid growing policy attention on digital assets and market integrity. Although the Stop Insider Trading Act centers on equity purchases by lawmakers, it sits alongside crypto-related proposals that target different risks. The Digital Asset Market Clarity Act’s proposed text, for example, would bar all U.S. public officials from issuing or sponsoring tokens until 2029, drawing a clearer line between official roles and token-related activities. That contrast has helped shape the discussion around the scope of ethics rules and how they should apply across traditional markets, digital assets, and event-driven trading.

Industry Reaction

Reaction among policymakers reflects a divide over how far Congress should go. Senator Elizabeth Warren criticized the House bill, calling it a measure with “major loopholes.” She argued that because lawmakers could continue owning and selling stocks, the legislation “won’t solve the problem,” adding that it is “not gonna fly in the Senate.” Her stance underscores an emerging split between those favoring an outright prohibition on stock ownership for members of Congress and those backing narrower limits focused on purchases and enhanced disclosures for sales.

Supporters of tighter ethics rules contend that stronger restrictions can reinforce market confidence, reduce the perception of self-dealing, and simplify compliance for public officials. Skeptics of an outright ownership ban point to practical considerations for divestment, administrative costs, and the treatment of diversified holdings, while maintaining that targeted rules—like a purchase ban and pre-sale notices—can achieve the objective of deterring insider trading.

Potential Impact

For market participants tracking policy risk, the House vote signals heightened attention to how public officials interact with both traditional and alternative markets. If enacted as passed by the House, the Stop Insider Trading Act would change the compliance posture for sitting lawmakers and their families by eliminating the ability to initiate new equity positions and layering on penalties and disgorgement for violations. The seven-day notice requirement before disposing of existing stocks could also create observable signals around trading behavior, potentially affecting liquidity or timing for sales by covered individuals.

For the digital asset industry, the bill’s relevance is indirect but notable. It arrives as Congress weighs rules that affect crypto market structure and event-driven platforms. The comparison drawn to the Digital Asset Market Clarity Act highlights how differing proposals could shape the boundary between official duties and participation in token-related activities. A wider prohibition on public officials issuing or sponsoring tokens—if adopted in that separate context—would set a clearer ethics perimeter for crypto-specific conduct by government figures through 2029.

Prediction markets represent another policy flashpoint. In June, Steil introduced the Stop Lawmakers from Predicting Act to prevent certain public officials, their spouses, and children from “wagering on public policy issues and political outcomes.” The proposal responds to visibility around platforms like Kalshi and Polymarket. According to the bill’s outline, penalties would mirror the stock-trading measure: a $2,000 fee or 10% of the value of prohibited bets. For platforms and users, a categorical bar on wagering by covered officials would aim to limit conflicts tied to policy or political outcomes.

Recent, high-profile episodes have thrust prediction markets into broader public view. The source material cites an incident involving a soldier who allegedly made more than $400,000 betting on Venezuela President Nicolás Maduro, who was removed by U.S. forces in January. It also notes reports that Donald Trump’s teleprompter operator made more than $100,000 betting on Kalshi event contracts tied to words and phrases in the president’s speeches. These episodes have intensified the policy discussion over whether certain market participants—especially public officials—should be permitted to trade on outcomes closely connected to government actions and official communications.

Legal and Compliance Implications

The Stop Insider Trading Act’s enforcement framework combines monetary penalties with disgorgement. As described from the House floor, violations would trigger a fine equal to $2,000 or 10% of the transaction amount and require forfeiture of any gains. The disgorgement component targets economic incentives, while a fixed or percentage-based fine is intended to deter rule breaches across differently sized transactions.

The bill’s carveout for existing holdings and the seven-day notice requirement before sales would shape day-to-day compliance for covered individuals. In practice, a notice window introduces lead time that can be evaluated against public information flows, creating a record of intent before execution. For ethics officers and legal counsel supporting members of Congress, operational processes would need to align with the statute’s notice and penalty provisions if it becomes law.

Under the separate prediction markets proposal, penalties would be calibrated similarly—a $2,000 fee or 10% of the value of prohibited bets on platforms like Kalshi and Polymarket—thereby bringing parity to enforcement for event-driven wagering by covered officials. From a compliance standpoint, categorical prohibitions can be easier to administer than case-by-case materiality tests, particularly where outcomes relate to policy decisions or political events.

What’s Next

Following the House’s 232–198 vote, the Stop Insider Trading Act reached the Senate on Thursday. The chamber will now determine whether to take up the bill in its current form, amend its scope, or pursue alternative approaches to address conflicts of interest for public officials. Senator Warren’s criticism suggests the debate over breadth—particularly whether lawmakers should be allowed to continue owning and selling existing stocks—will feature prominently in the Senate’s consideration.

Parallel policymaking tracks will also bear watching. The prediction markets bill sponsored by Steil, which targets wagering by certain public officials on platforms such as Kalshi and Polymarket, proposes penalties aligned with the stock measure and remains under consideration. In the crypto policy sphere, attention to the Digital Asset Market Clarity Act’s proposed text—specifically its approach to public officials and token activities until 2029—adds a separate, sector-specific lens to the broader ethics discussion.

For investors and compliance professionals, the trajectory of these proposals will inform how public officials can participate in equities, prediction markets, and token-related activities. As the Senate weighs the House-passed measure, stakeholders across traditional and digital markets will be tracking any adjustments to notice requirements, penalties, and the categories of covered officials that could reshape the ethics landscape in Washington.