A clear video can settle whether a public figure said a particular word. It cannot show who knew the script beforehand or whether the speaker chose a word to affect a bet. That gap is at the center of a Sept. 22 advisory on speech markets from staff at the Commodity Futures Trading Commission.

The CFTC's Division of Market Oversight says contracts tied to a named person's words, appearance or interaction carry heightened manipulation risk. Staff may view them as presumptively “readily susceptible to manipulation,” a phrase drawn from the existing duty of regulated exchanges to list contracts that are not readily susceptible. The advisory asks for a stronger, contract-specific explanation of safeguards. It is a staff view, creates no binding rule and does not prohibit the category outright. Kalshi still listed speech markets the following day.

The staff advisory gives exchanges four non-exhaustive questions. Does the person who determines the outcome face independent legal, professional or other obligations that deter gaming it? Could someone pressure or induce that person? Can outsiders verify the result under substantial public scrutiny, and does the decisive word or act have any real significance in its setting? Are the exchange's trading restrictions, surveillance and other controls suited to that particular risk?

Public proof of what happened addresses only one part of the test. Staff says a speaker's professional obligations cannot replace exchange controls. An exchange's filing should explain its measures and how it identifies people who control an outcome or have privileged access.

A recent check of Kalshi's mention markets covered Donald Trump's remarks at Xi Jinping's state arrival , Treasury Secretary Scott Bessent's television interview and BlackBerry's next earnings call .

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