Kalshi, one of the largest US prediction markets platforms, has reportedly removed its sports-related “mention markets” following the launch of a review by the Commodity Futures Trading Commission (CFTC) into this category of contracts.
The agency is examining whether these markets are particularly vulnerable to manipulation.
Mention markets allow participants to trade contracts based on whether a specific word or phrase will be spoken during a designated event, such as a broadcast, speech, or earnings call.
In the sports context, these had focused on whether announcers or analysts would use terms like “MVP,” “ankle,” or “redshirt” during game coverage. Kalshi has taken down all such sports offerings “until further notice,” according to individuals familiar with the matter.
It remains unclear when or if they will return.The platform continues to list mention markets tied to political events, corporate earnings calls, and live television newscasts.
Sports-related activity overall accounts for the large majority of trading volume on Kalshi, often exceeding 80 percent of weekly activity measured in the billions of dollars.
While mention markets represented a smaller slice of that total, they had drawn meaningful interest, with tens of millions of dollars in volume recorded on NFL announcer contracts alone during the prior season.
The CFTC review centers on concerns that certain mention markets may be readily susceptible to manipulation, a key requirement under rules for designated contract markets.
Contracts must not invite easy influence by insiders or others who could affect the outcome.
Sources indicated the agency is scrutinizing whether some of these products meet that standard, noting they can be relatively straightforward to influence compared with traditional event outcomes.
The timing follows a high-profile episode involving a former White House teleprompter operator for President Donald Trump.
Authorities examined trades in which the individual allegedly used advance knowledge of speech content to profit on related mention markets.
Kalshi reported that its surveillance systems flagged the activity and referred it to regulators.
That incident heightened attention on the integrity of these contracts.
Prediction market operators generally self-certify new contracts by filing with the CFTC and affirming compliance with applicable rules, including resistance to manipulation.
Growing internal and external questions have arisen about whether betting specifically on spoken words in certain settings aligns with those standards.
Competitor Polymarket offers similar products on its offshore platform but not on its CFTC-regulated US exchange.
Kalshi and the CFTC declined to comment on the review.
The suspension of sports mention markets comes as the broader prediction markets sector faces expanded regulatory attention, including ongoing disputes with state authorities over sports-related contracts and questions about market integrity.
Sports leagues have previously expressed reservations about offerings that appear easily influenced.Industry observers note that mention markets had been promoted in part as a way to attract participants beyond core sports trading, which remains the dominant category but also the most legally contested.
For now, Kalshi’s action narrows its catalog in one of the more specialized segments while the federal review proceeds. The outcome could influence how platforms design and list similar products going forward, balancing innovation in event contracts against safeguards against potential abuse.
