CFTC Warns Prediction Markets That ‘Mention’ Contracts Face Manipulation Risk

The U.S. Commodity Futures Trading Commission’s Division of Market Oversight has warned exchanges that prediction-market contracts tied to an individual’s words, attendance or interactions can present an elevated manipulation risk. In Staff Advisory Letter 26-27, issued September 22, 2026, the division set out a heightened framework for contracts whose outcomes turn on whether a person says specified words, attends an event or interacts with somebody else.

The warning addresses a particularly direct problem for event contracts: the person whose conduct settles the market may be able to influence that outcome. CFTC staff said exchanges seeking to list such products will need to make a stronger case that the contracts meet the Commodity Exchange Act’s anti-manipulation standard.

CFTC defines ‘Mention Markets’

The CFTC advisory calls event contracts based on an individual’s mention, attendance or interaction “Mention Markets,” and says they can settle on an observable act attributable to one person or a small group rather than on a broad economic measure or independently produced event. The advisory says that design can put the settlement trigger within the subject’s control and create heightened manipulation risk. Its letter is directed at exchanges listing event contracts, addressing the showing required before they list contracts relying on individual conduct, rather than setting out a separate enforcement action against an identified platform.

Why individual conduct raises the manipulation presumption

CFTC staff said Mention Markets may be presumptively readily susceptible to manipulation when settlement turns on the discrete conduct of one person or a small group, particularly where the event is not independently generated or externally verifiable. Under Core Principle 3 of the Commodity Exchange Act, an exchange must provide heightened justification before listing such a contract.

The advisory does not categorically bar every contract involving a public figure, candidate or other individual. The exchange instead must show that the market’s structure, settlement process and protections overcome the initial concern, including through independent verification, substantial public scrutiny, constraints on the person controlling settlement, and robust surveillance and prophylactic trading controls.

Staff also said the exchange should consider whether the event is produced independently of traders and the person able to cause the outcome and whether the result can be substantiated from sources beyond the individual conduct itself.

Verification, constraints and trading controls

The division’s assessment turns on more than whether a contract states a plainly worded outcome. CFTC staff identified independent verification, substantial public scrutiny, obligations constraining the person who controls settlement, and robust surveillance and prophylactic trading controls as factors that could help rebut the presumption that these contracts are susceptible to manipulation.

Those factors address different parts of the risk: verification and scrutiny concern how the outcome can be established and observed; constraints concern whether the person controlling settlement can deliberately create it; and surveillance and trading controls concern the exchange’s monitoring of activity.

In its account, The Block reported that the advisory permits the contracts only in limited circumstances and recommends proactive exchange controls. The report also linked the warning to more recent concerns around insider trading in prediction-market contracts.

Recent Kalshi cases illustrate information and participation risks

The CFTC’s February 25, 2026 advisory described two Kalshi-related cases involving improper trading: one in which a candidate traded on their own candidacy and another involving advance access to unpublished YouTube content. The penalties were $2,246.36 and $20,397.58, respectively.

The cases were separate from the CFTC’s September 2026 staff advisory, but they illustrate the risks posed by participant-specific influence over, or non-public knowledge of, a contract’s outcome.

That September position treats event contracts whose settlement depends on an individual’s conduct as potentially susceptible to manipulation and requires exchanges to provide heightened justification before listing them. Independent verification, constraints on the person controlling settlement, and robust surveillance and trading controls are among the factors that can help rebut the concern; a clear settlement question alone is not enough where a participant can directly determine the result.

Disclaimer: This article is provided for informational purposes only. It is not offered or intended to be used as legal, tax, investment, financial, or other advice.