You can bet on almost anything these days. Sports, elections, even whether a CEO will say "blockchain" on an earnings call.
That last one is getting a lot of attention from regulators right now, and it could change how these betting platforms operate.
Mention-market contracts let traders wager on whether specific words will show up in a speech, an earnings call, or a TV broadcast. Think of it as betting on what someone will say before they say it.
The Commodity Futures Trading Commission, the agency that watches over these platforms, is internally reviewing these mention markets, according to sources who spoke with CNBC. The CFTC alerted Kalshi, one of the biggest prediction platforms, to the review several weeks ago. Around that time, Kalshi pulled its sports-related mention contracts.
The review is still early, and it is not clear whether it covers all mention markets or just the sports ones. Neither Kalshi nor the CFTC would comment on the record.
These contracts are among the most criticized prediction products out there. The knock against them is simple: one person with enough money can easily move the odds by placing a few well-timed bets. That is why some platforms refuse to offer them at all.
The numbers show why this matters. Kalshi's mention-market volume for the past month was about $3.3 million. That is small compared to its crypto-focused markets, but the potential for mischief is what has regulators worried.
These markets sit at the intersection of speech and financial trading. A central bank statement or a CEO remark can already shift markets; the mention market simply puts a price on the phrase ahead of time. The hard part for regulators is telling a well-informed trade from one designed to move the odds. Tools like position limits and surveillance are easier to apply in larger markets, making the small mention contracts trickier to police.
The manipulation concern is not theoretical. In July, the CFTC said it had launched a probe into a person who once ran the teleprompter for Donald Trump. That person allegedly made $90,000 betting on Kalshi about what Trump would say.
Coinbase CEO Brian Armstrong made the point himself last December. He ended an earnings call by reciting random words like "bitcoin, ethereum, blockchain, staking" just to show how easily someone could influence those bets.
But supporters say the critics are missing the bigger picture. Powerful people's words already move billions in regular markets. A single sentence from a central bank chair or a CEO can shift stock prices in seconds, and attaching prediction value to those statements is useful, they argue.
Arjun Sawai, Kalshi's head of market operations, told the CFTC last month that the manipulation worries are overblown. He said mention markets "merely add a marginal, regulated, transparent, position-limited, surveilled funds to a vastly larger existing incentive structure."
The people making these statements already have plenty of reasons to be careful with their words. A small betting market does not change that.
The CFTC is not the only one taking a closer look. The Financial Times reported that JPMorgan cut off Polymarket, a like prediction platform, last October over regulatory concerns. Polymarket pushed back, saying "maintains a close, active relationship with JPMorgan across multiple entities" and that its CEO spoke at three of the bank's flagship events in the past year.
The bottom line: The CFTC's Innovation Advisory Committee meets Aug. 20 to address prediction markets, AI, and cryptocurrency. That meeting could shape how these platforms operate well into the future.
For investors, the takeaway is straightforward. These markets are tiny compared to stocks and bonds, but they are a window into how people think about uncertainty. If regulators crack down hard, the platforms will adapt or shrink.