Regulatory pressure on prediction markets intensified this week as federal and state authorities moved simultaneously to constrain one of the sector's most controversial products. The Commodity Futures Trading Commission issued a formal advisory warning of manipulation risks in mention markets. Meanwhile, New York's attorney general added a second major platform to her legal onslaught.

Federal Concerns Over Insider Trading

The CFTC's September advisory came months after a striking enforcement action that exposed the insider trading dangers lurking in prediction contracts. Gabriel Perez, a Trump White House staffer with decades of experience operating presidential teleprompters, was banned from prediction market trading for three years after allegedly exploiting advance knowledge of the president's speeches. By knowing what Trump would say before he said it, Perez allegedly placed effectively risk-free bets on mention markets tracking specific utterances.

The incident laid bare a fundamental vulnerability: contracts that hinge on "the discrete conduct" of a single individual are inherently difficult to verify independently and prone to manipulation by insiders with advance information. Now the CFTC requires Designated Contract Markets seeking to list mention contracts to implement "prophylactic trading rules" designed to detect and deter such abuse.

Here's the thing, though. The advisory carries no legal force. The CFTC framed it as guidance rather than regulation, meaning platforms retain discretion in how rigorously they police these markets. That technical distinction matters little to operators already under fire.

New York Targets Polymarket

On the same day the CFTC issued its advisory, New York Attorney General Letitia James filed suit against Polymarket, the second major prediction market operator to face enforcement action from the state. James alleges the platform operates an illegal gambling business in violation of New York law, citing particular concern that Polymarket permits users aged 18 to 20 to trade event contracts. Sports betting participants don't get that privilege under state rules.

The lawsuit mirrors the July action against Kalshi, though damages sought from Polymarket reach $4.6 billion. That's substantially lower than the $36 billion demanded from its rival. Polymarket responded by attempting to move the case to federal court and filing its own countersuit against James and the New York State Gaming Commission.

Volume Manipulation Questions Mount

Meanwhile, scrutiny of Kalshi's perpetual futures markets has intensified following allegations of artificial volume inflation. A Wall Street Journal investigation found that over one third of the platform's perpetual trades clustered around identical $5,500 order sizes, a statistical anomaly that fuels wash trading suspicions. Over one month, these uniform orders generated $5 billion in reported volume.

Kalshi dismissed the allegations in an 1,800-word statement, attributing the pattern to its market-maker fee structure rather than coordinated manipulation. The platform's vigorous denial underscores broader tensions around whether prediction markets can police their own integrity or require heavier regulatory oversight.

For an industry seeking mainstream legitimacy, this convergence of regulatory action and manipulation concerns represents a critical inflection point.