The Commodity Futures Trading Commission's Division of Market Oversight issued a staff advisory on September 22 telling exchanges that a category of event contracts is presumptively susceptible to manipulation. The category is the so-called mention market, a contract that settles on whether a named individual says particular words, appears at an event, or interacts with another person.
The advisory, Staff Advisory No. 26-27, does not prohibit the contracts and does not create a new legal obligation. What it does is move a burden. An exchange that wants to list a mention market is now expected to demonstrate why that specific contract is not the kind of thing a person could rig, and the streamlined path that lets exchanges self-certify products without a full submission becomes much harder to use for this category.
That is a meaningful shift in a market that has grown quickly and largely through self-certification.
Most event contracts settle on things nobody controls
The logic in the advisory starts with a comparison the industry has been able to avoid making explicitly. An event contract on a Federal Reserve decision, an election result or a ballgame settles on an outcome that no single participant can determine. Thousands of people act, and the answer emerges. That is what makes the product work: the settlement source is external, verifiable and beyond the reach of any one trader.
A mention market inverts that. The settlement source is a person. If the contract asks whether a particular executive will say a particular phrase at a conference, the speaker decides the outcome by deciding what to say. The market is not pricing a fact about the world. It is pricing an individual's conduct, and the individual is walking around inside the market's information environment.
The division's concern is not that every such contract is rigged. It is that the structure invites two specific problems. The first is that anyone with advance access to a script, a guest list, a set of prepared remarks or a scheduled appearance holds material nonpublic information about the settlement of a listed contract. That describes a lot of people: staff, organizers, publicists, security, and the subject.
The second is manipulation by proxy. A trader who wants a specific outcome does not have to be the person named in the contract. They can pressure, induce or social engineer the person who is. A contract that settles on what someone says is a contract on a decision that outsiders can influence, and the influence does not have to take the form of a trade.
Shifting the burden instead of banning the product
Regulators have several ways to address a risky product class. They can ban it, write a rule that defines what is permitted, or tell the market what they will be looking for and let the market respond. The advisory takes the third path, and the choice is deliberate.
A ban would end a growing line of business and invite a legal fight the agency may not want right now. A rulemaking would take years, and the commission is already working through a broader rule on public interest determinations for event contracts. An advisory is faster, needs no notice-and-comment process, and changes behavior through the approval path rather than through the statute book.
What exchanges lose under this approach is speed. Self-certification under Part 40 of the commission's rules lets an exchange list a new contract quickly on its own representation that the product complies. That route is the reason event contracts proliferated the way they did: a platform could design a contract, certify that it satisfied the Commodity Exchange Act, and have it trading without waiting for the agency to review the product first.
For mention markets, that route now requires a complete, contract-specific submission, and the advisory encourages exchanges to bring product designs to the division staff early. Both changes raise the cost of listing a contract and lengthen the path from idea to market. An exchange that lists dozens of contracts a month will feel the difference in staffing before it feels it in revenue.
The legal hook is a core principle rather than a prohibition. Designated contract markets are required to prevent manipulation of the contracts they list, and the advisory states that mention markets are presumptively the kind of contract that invites it. A presumption is a lighter instrument than a ban and a heavier one than silence. It tells an exchange that if a product goes wrong, the agency's starting position will be that the risk was identified in advance.
The approach also gives the commission room to change course. An advisory can be withdrawn or revised without a rulemaking record, and the pending rule on public interest determinations is the place where this category may eventually be settled more permanently. Until then, exchanges are operating against guidance that is clear about direction and short on bright lines.
Where the line falls between a market and a wager on a person
There is a version of the objection that the advisory addresses only indirectly. If a contract settles on whether a specific person will do a specific thing, the person has an economic interest in the outcome whether or not they trade it. Someone who knows a contract exists on their own conduct can shape the result for free, and can be paid to shape it without ever placing an order.
That is what separates a mention market from a market on a hurricane's landfall. Nobody can be induced to steer a storm. A person can be induced to give a speech, cancel an appearance, or use a particular phrase, and the inducement does not have to be a bribe. It can be a favor, a booking, a scheduling change, or simply a conversation.
The commission's answer is not to prohibit the products but to make exchanges prove they have thought about which of those channels are open for each contract. A market on a public figure's public remarks, with the exchange watching positions and the individual bound by other obligations, can be defended. A market on whether a private person attends a private dinner is much harder to defend, which is roughly where the four factors land.
Four factors that describe a defensible contract
The advisory lists the considerations staff will weigh, and read together they describe a template. First, whether the individual whose conduct sets the outcome is bound by independent legal, professional, contractual, fiduciary or confidentiality obligations that would meaningfully deter manipulation. A contract about a person with something to lose from misbehaving is easier to defend than one about a person without.
Second, whether the contract can be manipulated by proxy, which pushes toward subjects whose behavior is hard to influence from outside. Third, whether the conduct is independently verifiable and subject to substantial public scrutiny, which effectively rules out contracts about private settings. Fourth, whether the exchange's surveillance and position controls are calibrated to that contract's particular risks, including identifying insiders through public disclosure records.
Those four tests point in one direction. A mention market that survives them looks like a bet on a public figure performing a public act under public scrutiny, with the exchange watching who is trading. A mention market that does not might still be listable, but only after the exchange has made the case for it.
Two settled cases show the failure mode
The advisory is not a response to a theoretical risk, and the commission's enforcement record in this area is short but specific. In July, the CFTC settled its first case alleging manipulation of a prediction market. Former Representative George Santos was accused of trading a contract on his own attendance at the State of the Union while posting misleading statements on social media. He agreed to return $17,569.98 in profits, pay a $17,500 civil penalty and accept a three-year trading ban. Kalshi, the exchange, reportedly banned him for life.
In August, a former presidential teleprompter operator settled a case involving insider trading on mention-market contracts tied to remarks he knew were coming. He was fined $172,539. Both cases share a feature that explains the advisory's focus: the person with the decisive information was the person at the center of the contract, and in one case the trader was the subject himself.
The second case is the one the four factors are built around. A teleprompter operator does not control what the president says, but he reads the text before the audience does, and that is enough to trade on. The advisory treats that as material nonpublic information, which means the universe of insiders around a mention market extends past the named individual to everyone with early access to their plans: staff, speechwriters, producers, event organizers, security details.
That is a surveillance problem as much as a legal one. An exchange can require insiders to be identified and monitored, and factor four asks exactly that, but the pool of people who know a remark is coming is often larger than any list the exchange can assemble from public records. Where the pool cannot be bounded, the advisory's logic suggests the contract is not.
The industry has started adjusting ahead of the guidance. Kalshi removed sports-related mention markets amid the scrutiny, and platforms are waiting to see how the commission's pending rule on public interest determinations lands. The larger context is a market that has expanded from a novelty into a sector with more than 1,600 event contracts listed and a dozen newly designated exchanges since the start of 2025, with more than ten bills in Congress touching the space since January.
Congress is a variable the agency cannot control, and it is the reason this advisory has a provisional feel. Legislation that defines which event contracts may be offered would supersede the guidance, and several of the pending bills would move the question out of the agency's discretion altogether. The commission's advisory can be read as an attempt to establish its position before someone else writes one for it.
None of that expansion stops under an advisory. What changes is the price of admission for the riskiest slice of the product line, and the answer the agency expects an exchange to have ready before the contract trades: why this bet on this person's behavior is not one the person can decide.
Primary sources
- National Law Review, Don't Mention It: The CFTC Places New Guardrails on Mention Markets, for the advisory's terms, the four factors and the enforcement precedents.
- Investment News, CFTC warns prediction market exchanges on mention markets, for how the advisory changes the listing path for exchanges.
- Wealth Professional, CFTC flags manipulation risk in prediction market contracts tied to individual conduct, for the proxy-manipulation and insider-information concerns.