Feds Probe Kalshi ‘Mention Markets’ as CFTC Investigates White House Betting Controversy

Federal regulators have opened a review into “mention markets,” the fast-growing corner of prediction-market betting where traders wager on the exact words a public figure will say, and Kalshi has responded by pulling every sports-related mention market from its platform “until further notice.” The move, first reported by NPR and confirmed by multiple outlets on Aug. 14, comes as the Commodity Futures Trading Commission examines whether the category is too easy to manipulate.

Mention markets let bettors put money on whether a speaker will utter a specific word or phrase during a live event. On Kalshi and rival Polymarket, that has meant contracts on everything from a sportscaster saying “MVP,” “ankle” or “redshirt” during a broadcast to whether President Trump will name a particular company during a speech. Sports wagers account for more than 80% of the billions of dollars traded weekly on Kalshi, so removing sports mention markets cuts meaningfully into one of the platform’s most active categories, even as political, earnings-call and news-broadcast mention markets remain live for now.

How the Teleprompter Scandal Triggered the Review

The stepped-up scrutiny traces back to a controversy that reached the White House last month. Federal officials revealed that Gabriel Perez, President Trump’s longtime teleprompter operator, had used advance access to prepared remarks to bet on mention markets tied to the president’s word choice, reportedly profiting more than $100,000. Kalshi said its internal surveillance tools flagged the suspiciously well-timed bets and referred them to authorities; the company froze roughly $90,000 of Perez’s winnings, and he is now said to be in settlement talks. The White House confirmed Perez is no longer working in government, and then-press secretary Karoline Leavitt called his actions “a disgrace.”

That episode exposed a structural weakness regulators say is inherent to the category: mention markets depend on the words of a single person, which creates an obvious incentive for anyone with early or inside knowledge of a script to trade on it. According to two people with direct knowledge of the CFTC’s review who spoke to NPR on condition of anonymity, the commission is now examining whether some mention-market contracts violate the Commodity Exchange Act’s requirement that listed contracts not be “readily susceptible to manipulation.”

A World Cup Moment Showed How Wild These Markets Can Get

The unpredictability of mention markets was on full display during the World Cup final broadcast on Fox, when traders piled millions of dollars into a market on which celebrities would appear on camera. When a Fox sportscaster mistook actor Matt Damon for Brad Pitt, several news organizations briefly and mistakenly reported that Pitt was in attendance. Kalshi data later showed that traders who bet Pitt was not there collectively lost more than $287,000 in the confusion — a case regulators and Kalshi’s own legal team have pointed to as evidence of how thinly these markets can be manipulated or scrambled by a single mistaken broadcast call.

That kind of volatility is part of what has made mention markets so lucrative for a dedicated subset of traders. According to NPR’s reporting, some individuals treat mention-market trading as a full-time pursuit, going as far as installing television antennas in order to shave fractions of a second off the delay on live broadcasts and gain an edge on the rest of the market. Trump’s famously digressive speaking style has made his mention markets some of the most heavily traded on the platform, with contracts tied to the president reportedly accounting for the large majority of visible volume still listed in the mentions category.

Kalshi’s Legal Fights Extend Beyond Washington, D.C.

The CFTC review lands alongside other legal pressure on the prediction-market sector. Kalshi and Polymarket are already fighting dozens of lawsuits from states and tribal gaming regulators, some alleging the platforms’ contracts amount to unlicensed sports betting dressed up as financial products. In Washington state, a King County Superior Court judge has separately ordered Kalshi to stop offering or marketing contracts tied to sports, elections, entertainment and mentions to state residents, with geofencing restrictions required by early September. The state attorney general’s office argued the category is “rife with potential for cheating by people close to the source” and said Kalshi’s marketing of the contracts as prediction markets rather than gambling was deceptive.

At the same time, the CFTC has moved to shield Kalshi’s national operations, ordering the exchange to keep running while its broader legal battle with New York plays out — a sign of just how unsettled the regulatory landscape for Kalshi and its rivals remains even as individual states and courts reach conflicting conclusions.

What Happens Next

Kalshi and CFTC spokespeople both declined to comment on the review, and the commission has not published anything publicly describing its scope or timeline. Political mention markets, earnings-call contracts and news-broadcast wagers remain live on the platform for now, meaning traders can still bet on what a company executive says during a quarterly call or what a politician says in a debate, even with sports mention markets frozen. It remains unclear whether or when the sports category will return, and traders who treat mention markets as serious business are bracing for the possibility that regulators could move to ban the category altogether rather than let it continue in its current form.