What the court decided
On 24 August 2026, Judge Margaret Garnett granted the CFTC permission to submit a brief in United States v. Van Dyke. The agency may present its interpretation of the Commodity Exchange Act and explain why it believes the relevant event contracts fall within the statutory definition of swaps.
The parties may submit supplemental responses of up to ten pages by 9 September. The CFTC does not become a party to the prosecution, and its analysis does not bind the judge. The brief adds the specialist regulator's view to the record before the court addresses the pending procedural arguments.
What prosecutors allege
Prosecutors say the active-duty U.S. Army master sergeant obtained nonpublic information while working on Operation Absolute Resolve and used it to trade contracts on Polymarket. The indictment describes 13 trades totaling approximately $33,934 and alleged profit of about $409,881.
Those are allegations that must still be proved. Van Dyke has pleaded not guilty and disputes whether the cited laws apply. Polymarket is not a defendant in this criminal case: the proceeding concerns one user's conduct and the legal classification of the contracts he acquired.
Why the definition of a swap matters
The legal theory depends on whether contracts tied to an event outcome qualify as swaps under federal commodities law. If the court accepts that classification, rules addressing fraud and the use of material nonpublic information may apply to these trades even though they did not occur on a conventional derivatives exchange.
The defense is seeking dismissal of parts of the case and argues that the government is stretching the swap definition. The CFTC, by contrast, previously described its parallel civil action as the first event-contract insider trading case. Allowing the brief gives the court both interpretations, but it does not mean the judge has adopted the CFTC's position.
How the criminal and civil cases interact
The Department of Justice is pursuing the criminal case, where a conviction could lead to criminal penalties. Separately, the CFTC filed a civil complaint seeking restitution, disgorgement of alleged gains, financial penalties, trading restrictions and an injunction against future violations.
The civil proceeding has been stayed while the criminal case develops. That pause limits overlapping discovery and potentially conflicting procedural steps. Neither case has reached a final judgment, so the alleged gains and violations should not be described as facts established by a court.
What the order means for prediction markets
The immediate effect is narrow: the judge will receive the specialist regulator's argument before deciding the defense motions. A broader precedent would emerge only if a later ruling squarely defines the legal status of event contracts and the limits of federal jurisdiction over them.
Even then, one ruling would not automatically settle every question for Polymarket or competing platforms. Contract design, access by U.S. users, platform rules and the relationship between federal law and state restrictions may require separate analysis. For now, the market has received a meaningful procedural signal, not a final regulatory standard.
- The court allowed an amicus brief from the CFTC but did not find the defendant guilty.
- The central dispute is whether the relevant event contracts qualify as swaps.
- Polymarket is not a defendant in the criminal case against Van Dyke.
- The parallel CFTC civil case is stayed while the criminal proceeding develops.
