1. Congress Asked to Consider Limits on Officials Betting
House Oversight Committee Chairman James Comer on Friday, November 13, released a staff memorandum on prediction markets insider trading that urges Congress to consider restricting federal personnel from betting on platforms such as Kalshi and Polymarket. The memo cites suspicious trades by government officials, military personnel and security-clearance holders, and lays out options running from a total ban to narrower contract limits.
The document is the product of an investigation into whether people inside the federal government have been using information unavailable to the public to place winning wagers on future events. It does not propose specific legislative text. Instead, it frames the issue as a public corruption problem and hands lawmakers a menu of possible responses.
The release marks the clearest signal yet that the committee wants Congress to treat prediction markets as a venue where the long-standing rules against trading on official secrets must be enforced and possibly expanded. For an industry that has grown quickly and drawn large volumes of retail activity, the prospect of new federal limits on who may participate is significant.
2. What the Oversight Investigation Found
Committee staff assembled close to 1,700 pages of documents during the inquiry. They also held five bipartisan briefings in which prediction market platforms explained how they spot and report suspicious activity on their exchanges.
The central concern running through the memo is that some participants have been in a position to know the outcome of an event before the public does. Prediction markets let users buy and sell contracts that pay out depending on whether something happens, such as an election result, a policy announcement or a military development. A person who already knows how one of those questions will be resolved holds an obvious and unfair edge over everyone else in the market.
The memo specifically identifies three groups as sources of concern: government officials, members of the armed forces and people holding security clearances. Each of these groups can, by the nature of their work, gain advance knowledge of decisions or operations that later become the subject of public betting contracts.
By grounding its recommendations in an investigation that spanned document collection and direct briefings from the platforms themselves, the committee is presenting its findings as a fact-based starting point for congressional debate rather than a reaction to a single incident.
3. Comer Frames the Issue as Public Trust
Comer presented the memo as a response to public worries about corruption in government. He said Americans are concerned about officials enriching themselves, and that Congress has an obligation to make sure the law stops insider trading and prevents people in public service from profiting from information they obtained through their jobs.
He went further, saying lawmakers now need to weigh additional reforms aimed at preventing corruption and rebuilding trust in public institutions. That language suggests the chairman sees the current framework as a floor rather than a ceiling, and that he expects the committee's work to feed into legislative proposals.
The framing matters. By casting the issue in terms of government ethics rather than financial market structure, Comer positions potential restrictions as a matter of conduct for public servants. That approach places the debate alongside earlier efforts to curb stock trading by members of Congress and senior officials, rather than as a direct attack on the platforms themselves.
4. From a Full Ban to Narrow Contract Limits
The memo's core recommendation is that Congress examine restrictions on federal personnel that could take several forms. At the broadest end, lawmakers could bar government employees from trading on prediction markets altogether. At the narrower end, they could prohibit trading only in specific categories of contracts, such as those linked to government decisions.
A narrower rule would target the area where the conflict of interest is most direct. A contract asking whether an agency will take a particular action, or whether a policy will be announced by a certain date, is exactly the kind of market where an official involved in that decision could profit from inside knowledge. A full ban, by contrast, would remove any need to judge which contracts present a risk, but would also reach officials whose work has no connection to the events being traded.
The committee also argued that whatever rules Congress adopts should apply across every branch of government. In its view, a uniform standard would reinforce the principle that government employees should not profit from nonpublic information, and would remove even the appearance of impropriety.
That emphasis on appearances is notable. Ethics rules for public officials often aim not only to stop actual misconduct but also to prevent situations that could make the public suspect misconduct. A rule covering the executive branch, Congress and the courts alike would avoid the perception that one group of officials is held to a looser standard than another.
5. Is Polymarket Insider Trading Legal?
No. Trading on nonpublic information tied to an official position is already prohibited, and the memo stresses that existing insider trading laws apply to prediction markets, including Polymarket and Kalshi. New rules would add to that baseline rather than create it from scratch.
The committee points to the Commodity Exchange Act, as amended by the STOCK Act, which bars federal employees, members of Congress and others from trading certain derivatives using nonpublic information connected to their positions. Prediction market contracts are treated as derivatives under federal commodities law, which brings them within the reach of these provisions.
The Commodity Exchange Act is the main federal statute governing futures, options and swaps in the United States, and it underpins the authority of the Commodity Futures Trading Commission. The STOCK Act, short for the Stop Trading on Congressional Knowledge Act, was passed to make clear that lawmakers and federal employees are not exempt from insider trading prohibitions and owe a duty not to exploit information gained through their public roles.
The memo's point is that the legal hook already exists. What Congress must decide is whether the current prohibition, which depends on proving that someone traded on nonpublic information linked to their job, is enough, or whether a simpler bright-line rule on who may trade would be easier to enforce and more effective at preserving public confidence.
6. Platforms Credited for Flagging Suspicious Trades
The committee gave the platforms notable credit for policing their own markets. According to the memo, most of the insider trading incidents that have come to light were first reported to regulators by the platforms themselves, rather than discovered independently by authorities.
Polymarket was singled out for hiring a former law enforcement expert and for launching PolyGraph, a surveillance tool developed with blockchain analytics firm Chainalysis. Because Polymarket operates on blockchain infrastructure, trading activity leaves a public record that analytics tools can examine for patterns, such as wallets that consistently place large bets shortly before major announcements.
Kalshi was also recognized for strengthening its detection protocols. Kalshi operates as a federally regulated exchange, and the memo's acknowledgment suggests both of the largest US-facing platforms have invested in tools to identify unusual trading.
This credit is significant for the industry. It indicates the committee does not view the platforms as the source of the problem, and it positions any future restrictions as rules aimed at the conduct of government personnel rather than as penalties on the companies running the markets.
7. Recent Cases Behind the Push
Two recent cases illustrate the risks the memo describes. In April, a US soldier was charged in connection with alleged Polymarket trades linked to a military operation that resulted in the capture of Venezuelan President Nicolas Maduro. The case drew attention to the possibility that service members with knowledge of operations could bet on their outcome before the public learned of them.
In August, the CFTC fined a former White House teleprompter operator for placing bets on presidential speeches. Prediction markets often list contracts on what a president will say or which words will appear in an address, and a person with early access to a speech text is in a position to know the answers in advance.
Both cases involved people whose jobs gave them access to information that later became the subject of public betting. They help explain why the memo focuses on military personnel and clearance holders as well as elected and appointed officials: the risk is not limited to senior decision-makers, but extends to anyone with privileged access to sensitive information.
8. Prediction Markets Face Pressure on Several Fronts
The memo arrives as prediction markets face scrutiny from multiple directions at once. The CFTC is moving to assert its authority over the sector in a dispute with several states, which have sought to treat some event contracts as gambling subject to state rules.
That jurisdictional fight goes to the heart of how the industry will be regulated. If federal authority prevails, platforms would answer primarily to the CFTC under a single national framework. If states succeed in applying their own gaming laws, operators could face a patchwork of licensing requirements and restrictions that vary from one state to the next.
Political pressure is also building in the Senate. Sen. Elizabeth Warren, who is set to become chair of the Senate Banking Committee, is also targeting the industry. Her incoming role would give her a prominent platform from which to press for tougher oversight.
Taken together, these developments mean prediction market operators must now navigate a congressional ethics push in the House, an incoming Senate committee chair focused on the sector, and an unresolved federal-state contest over who regulates their products.
9. What Comes Next for Prediction Markets Insider Trading Rules
The memo leaves the scope of any new restrictions to Congress. Lawmakers will need to decide whether to pursue a full ban on federal personnel trading on prediction markets, a targeted ban on contracts linked to government decisions, or some combination, and whether to apply the rules uniformly across all three branches as the committee recommends.
Any proposal would build on the existing prohibitions in the Commodity Exchange Act and the STOCK Act. The key policy question is whether a bright-line rule on participation would deter misconduct more effectively than the current approach, which relies on investigating and proving individual cases after the fact.
For platforms such as Kalshi and Polymarket, a rule limited to government personnel would affect only a small portion of their users, but it would add a new compliance obligation. Operators would likely need ways to identify account holders covered by the restrictions, building on the surveillance and detection systems the committee has already praised.
For now, the memo serves as a formal record of the committee's findings and a starting point for legislative debate. With the CFTC, the states and the incoming Senate Banking chair all focused on the same industry, prediction markets are set to remain a policy priority in Washington in the months ahead.