House Oversight Staff Urge Curbs on Officials' Prediction Market Trades

A Nov. 13 staff memorandum from the House Oversight Committee recommends that Congress restrict federal employees, lawmakers and congressional aides from trading prediction-market contracts tied to government actions or political outcomes — even when those officials hold no confidential information. The document, a recommendation rather than an enacted restriction, also presents a broader ban on officials' prediction-market trading as an option.

The proposal targets event contracts that resolve to a simple yes or no outcome on questions such as policy decisions or election results. Staff proposed limiting those categories at a minimum, and recommended information sharing between platforms and regulators as an enforcement mechanism. Any restriction would require congressional action before it binds anyone.

What triggered the inquiry?

The committee opened its investigation on May 22 with letters to Kalshi and Polymarket, the two largest political event-contract venues. On Sept. 29 it expanded the probe to Hyperliquid Labs, Crypto.com and Aristotle Exchange, Inc., which operates the long-running academic-market platform PredictIt.

The expanded inquiry gathered nearly 1,700 pages of documents and communications and included five bipartisan briefings with platform representatives. Four platforms provided extensive information on their internal controls, and — a detail practitioners should note — platform operators themselves initially identified most of the incidents they reported to the committee.

On the surveillance side, Polymarket runs a monitoring system called PolyGraph, developed with Chainalysis, and has hired a former law enforcement expert to staff its integrity operations.

How would this differ from current law?

Prediction-market contracts already fall within existing federal insider-trading rules. Those rules bar covered officials from trading certain derivatives on the basis of nonpublic information acquired through their government roles.

The staff proposal goes further. It would cover some contracts even when traders did not use inside information at all — a shift from an information-based standard to a category-based prohibition. For compliance teams at Kalshi, Polymarket, Crypto.com and the other named venues, that distinction matters: a category ban would require identity screening against government rosters rather than reliance on surveillance to detect informational edge.

The case that frames the debate

A federal indictment alleges that Army Master Sergeant Gannon Ken Van Dyke used classified information about the operation to capture Venezuelan leader Nicolás Maduro to trade on Polymarket. Prosecutors allege he made roughly 13 trades between Dec. 27, 2025 and Jan. 2, 2026, profiting approximately $409,881 — nearly $31,500 per trade on average. The allegations have not been proven in court.

House Oversight Committee Chairman James Comer framed the stakes in institutional terms. "Congress must consider additional reforms to prevent public corruption and restore the American people's trust in government," he said.

What does this change for platforms and officials?

For now, nothing is operative. The memorandum is a recommendation, and restrictions take effect only if Congress passes legislation. What does change is the direction of travel: oversight staff have now put a written, documented proposal on the record, backed by an evidence base of 1,700 pages and five bipartisan briefings.

For platform operators, the near-term practical exposure is a prospective information-sharing regime with regulators — which would formalize today's voluntary incident reporting into a standing channel. For federal employees, lawmakers and congressional aides, the memorandum signals that trading on government-adjacent outcomes may soon carry restrictions that current insider-trading law does not impose.

The next concrete milestone is congressional action: without a bill, the Nov. 13 recommendations remain advisory, and the trading conduct they describe stays lawful for officials who do not possess material nonpublic information.