CFTC Warns Mention Contracts on Prediction Markets Are Risky

The CFTC warned regulated prediction market exchanges that contracts tied to a named person's words or actions carry a heightened manipulation risk and put their US license at stake. The warning lands hardest on operators like Kalshi and Polymarket and on traders who trade such contracts.

What the CFTC flagged as a manipulation threat

On Tuesday the CFTC's Division of Market Oversight issued an advisory on so-called mention contracts. These are bets on whether a named person will say certain words, show up at an event, shake someone's hand, or appear in a photo with someone on social media. Unlike contracts tied to economic data or election results, the outcome here depends on the actions of one specific person rather than a process nobody controls.

Under Core Principle 3 of commodity exchange law, registered venues may only list contracts that aren't readily susceptible to manipulation. Regulators have typically applied that standard to contracts tied to economic data or sports outcomes, where no single person controls the result. Mention contracts break that pattern: the outcome depends directly on what one named person says or does, not on an independent process.

The regulator believes such contracts should be presumed susceptible to manipulation by default. The advisory's own example is simple. A contract on whether a podcast host says a catchphrase is easy to rig. The host can simply say it, and a trader can arrange an on-air appearance or pay for a mention.

The warning came weeks after the CFTC fined a former White House teleprompter operator. He traded contracts on whether the president would say certain words during his remarks, holding the speech text before it aired, and profited from bets tied to those speeches. The Commission made him return $107,539 in profits and pay a further $65,000 penalty.

Why Kalshi and Polymarket are in the crosshairs

The advisory formally applies to all registered event exchanges, but it lands hardest on the two dominant players in the prediction market space, Kalshi and Polymarket. According to Cointelegraph, Kalshi's site traffic jumped 1,500% amid heightened interest in the regulatory disputes surrounding the platform. Earlier this year the CFTC already let Kalshi and Coinbase launch crypto perpetual futures in the US, so the exchange keeps expanding its product line under the same regulator's watch.

Prediction markets are growing fast. Under an updated forecast from investment bank Bernstein, the sector could reach $10 trillion by 2035, ten times the bank's earlier estimate. That growth is exactly why every new CFTC signal draws outsized attention from market participants, from large market makers down to everyday traders betting a few dollars at a time.

Polymarket, Kalshi's main rival, got a CFTC license last year to return to the US market and still settles its contracts in USDC. The new manipulation presumption doesn't exempt the platform from the general standard. To keep serving US traders through licensed infrastructure, it will need to show that a mention contract's outcome can't be rigged in advance.

What changes for mention contract traders

The manipulation presumption can be rebutted, but only after a heightened review. CFTC staff named four factors it will weigh. It looks at whether the contract's subject faces legal or professional duties that discourage manipulation, whether outside pressure could sway them, whether their conduct is independently verifiable and publicly scrutinized, and how solid the exchange's own trading surveillance is.

A contract on whether a politician shakes a specific rival's hand during a debate, for instance, will now need evidence that neither side could have arranged the gesture beforehand. Without that evidence, an exchange risks having the contract's registration rejected, or facing scrutiny after the fact if the CFTC decides to review a specific product.

The regulator also suggested concrete measures exchanges could apply:

• restricted lists of participants tied to the contract itself
• third-party screening of anyone opening a position
• pop-up warnings before a trade goes through
• position limits sized so manipulation would cost more than it could earn

For an everyday trader, that means longer verification queues and a narrower choice of contracts on topics where the outcome hinges on one person.

How the regulator and the market reacted

CFTC Chair Mike Selig publicly backed the advisory. In a post on X, he wrote that regulatory clarity drives sound markets.

"Regulatory clarity drives sound markets."

- Mike Selig, CFTC Chair, from a post on X, September 22, 2026

The advisory itself carries no legal force. It reflects the views of Division of Market Oversight staff, signed by acting director Duncan Hennes, rather than a decision by the full Commission. For exchanges, it reads more as a signal to prepare than an order to halt trading immediately.

Selig took over the CFTC after the Trump administration repeatedly promised a lighter regulatory touch for crypto markets and financial innovation. The new advisory shows that lighter touch doesn't extend to prediction markets across the board. The regulator is picking its targets, leaving room for contracts with a verifiable outcome while squeezing the ones that hinge on one person's words.

What comes next

The advisory follows a broader CFTC push to define which events can be turned into contracts at all. In June the Commission proposed a framework for judging contracts tied to terrorism, assassination, war, or gambling, and it wants to bar sports contracts that settle on a single player's actions, such as fouls or specific plays. Today's advisory directly cites that June proposal's reasoning, so the CFTC is building a consistent approach to all contracts tied to a specific person's actions rather than ruling on each product one at a time.

The question of who should regulate this market at all remains unsettled. Several states, including Illinois, Arizona, and Connecticut, argue that sports event contracts amount to unlicensed gambling and have filed suits over it. In April, the Justice Department and the CFTC countersued those three states to assert the federal regulator's exclusive authority over the space. In the Arizona case, a court has already blocked the pursuit of Kalshi, a ruling that strengthens the CFTC's hand ahead of the new advisory.

The stakes for exchange operators rise along with market volume. The more money flows through contracts tied to specific events, the more closely the CFTC will check whether those products pass its own manipulation test, and the costlier it gets for companies that ignore the regulator's latest signals.

Pressure on prediction markets isn't letting up. Mention contracts have become the CFTC's newest front in the fight over who sets the rules for this market.