The U.S. House Committee on Oversight and Government Reform has expanded its investigation into potential insider trading on prediction markets, seeking information from Hyperliquid, Crypto.com and Aristotle Exchange as lawmakers examine how trading platforms detect and prevent the use of material nonpublic information. The latest requests broaden an inquiry that has focused on the rapid growth of event-contract markets and the possibility that people with access to confidential government, corporate or other sensitive information could use that knowledge to place profitable trades.
The committee is seeking details about the platforms’ policies, surveillance systems and procedures for identifying suspicious trading. Importantly, the inquiry does not establish that Hyperliquid, Crypto.com or Aristotle Exchange engaged in insider trading or knowingly facilitated it. Congressional information requests are investigative measures intended to gather evidence and understand industry practices. The expansion demonstrates, however, that congressional scrutiny is moving beyond the largest standalone prediction-market operators and toward the broader infrastructure through which event contracts are offered.
Lawmakers Focus on Information Advantages
Prediction markets allow traders to buy contracts whose value depends on whether a specified event occurs. That structure creates particular concerns around events whose outcomes may be known by a small group before becoming public. A government employee with advance knowledge of a policy decision, for example, could theoretically trade a contract tied to that announcement before the wider market receives the information. Similar risks can arise around corporate decisions, regulatory actions and other market-moving events. The issue differs from conventional securities insider trading because prediction contracts do not necessarily involve securities, and the applicable legal framework can depend on how and where a particular product is offered.
The Commodity Futures Trading Commission oversees federally regulated event-contract markets, while decentralized platforms can operate through substantially different technical and jurisdictional structures. The committee’s widening inquiry reflects those differences. Crypto.com has expanded into prediction markets through its U.S. derivatives infrastructure, while Aristotle Exchange operates regulated event contracts. Hyperliquid, by contrast, is best known as a decentralized perpetual-futures platform and has expanded the range of markets available through its ecosystem. Examining platforms with different structures could help lawmakers assess whether existing surveillance and compliance standards are consistent across the growing prediction-market sector.
Scrutiny Grows With Prediction-Market Volumes
The investigation comes as prediction markets move rapidly into mainstream finance. Kalshi has expanded across politics, economics, sports and other event categories, while Polymarket has returned to the U.S. through regulated derivatives infrastructure. Crypto exchanges and brokerage platforms have also increasingly explored event contracts. Growth has been accompanied by several high-profile cases involving allegations that traders possessed information unavailable to the public. Those episodes have raised questions about wallet monitoring, know-your-customer controls, suspicious-activity detection and whether platforms can identify accounts repeatedly making unusually accurate trades immediately before important announcements.
Blockchain-based markets provide one potential advantage for investigators because transactions can often be traced publicly between wallets. But identifying who controls those wallets — and establishing whether profitable trading resulted from confidential information rather than research, inference or chance — can be considerably harder. Congressional scrutiny could therefore influence how prediction platforms design future surveillance systems. Possible areas of focus include restrictions on employees trading markets related to their work, monitoring linked accounts, detecting coordinated wallet activity and procedures for responding when potentially sensitive markets experience unusual trading immediately before an event. The House inquiry remains at the information-gathering stage.
There has been no congressional finding that the three newly contacted platforms violated insider-trading laws or knowingly permitted improper activity. The significance of the expansion is instead its scope: Washington’s examination of prediction-market integrity is increasingly encompassing centralized, regulated and decentralized trading infrastructure, as lawmakers consider whether existing rules can adequately address information advantages in a rapidly growing market.