Kalshi Bans George Santos for Life Over Manipulated Prediction Bets

Kalshi has permanently banned former congressman George Santos from trading and fined him $71,356 for manipulating a market tied to his own attendance at the State of the Union address. In parallel, the exchange handed a three-year trading ban to congressional candidate Laurie Buckhout, and both actions add to mounting regulatory pressure on the entire prediction market sector, including crypto-native rival Polymarket.

What Santos and Buckhout actually did

According to a Kalshi disciplinary notice dated August 28, Santos placed a series of large trades between February 2 and 25 in a contract that forecast his own attendance at the State of the Union. Since he could personally influence the outcome, exchange rules barred him from trading that contract.

"If a Trader is a decision maker, either directly or indirectly, or has any influence, directly or indirectly, no matter the scale and importance of the influence, on the outcome of the Underlying event of any Contract, that Trader is prohibited from attempting to enter into any trade, either directly or indirectly, on the market in such Contracts."

- Kalshi trading rules, conflict-of-interest provision

He also made public statements about his attendance, some of them false, in an apparent bid to move the price of the "Yes" and "No" contracts. Contracts like this let traders bet on a specific outcome of a public event, and the closer the price sits to $1, the more likely the market considers that outcome. Santos's statements artificially pushed that probability in his own favor. Kalshi found this let him profit $17,839.57. Buckhout, the Republican candidate in North Carolina's 1st congressional district, was penalized for trading a contract on the election outcome in which she herself appeared as a betting option. She was fined $2,590 and suspended for three years. Buckhout had publicly announced her congressional campaign in North Carolina before she became a betting option in Kalshi's contract on that very race. The regulator found a conflict of interest in her ability to influence the outcome alone, even without proving actual price manipulation.

What it means for trust in prediction markets

For traders on Kalshi or Polymarket, these two cases confirm the core risk of such platforms: a contract's outcome can be moved by the very people involved in the underlying event, not just outside factors.

Kalshi positions itself as a CFTC-regulated exchange, and the lifetime ban is the first such sanction against a former member of Congress in the company's history since its 2021 launch. For the industry, it signals that platforms are willing to publicly punish even high-profile participants to preserve trust with regulators and users. The gap between the two violators' conduct shows the company's new approach to discipline: Buckhout formally admitted the violation and agreed to the settlement terms, while Santos did not cooperate with the investigation. That difference showed up both in the size of the fine and in Kalshi's public language in the official filings.

In traditional stock markets, bans on insider trading have existed for decades and are enforced by the SEC. Prediction markets instead fall under the CFTC rather than the SEC, since event contracts are legally classified as derivatives, not securities. That's a relatively new legal status, which is why the first high-profile cases, including Santos's, are effectively testing the limits of how existing regulatory tools apply to this new class of products.

Risks for traders on Kalshi and Polymarket

Both cases are part of a broader wave of scandals around the integrity of prediction markets. Earlier this year, federal regulators fined Gabriel Perez, Donald Trump's former teleprompter operator, $172,000 for trading Kalshi contracts tied to the president's speeches. A MrBeast video editor was fired amid a Kalshi insider-trading probe, and a US soldier was charged over similar trades on Polymarket.

Kalshi's crypto-native rival Polymarket settles trades in the stablecoin USDC, which means investigations like these bear directly on the crypto market too, not just traditional exchanges.

• Participants in an event, such as candidates, officials, or public figures, are legally barred from trading contracts whose outcome they can personally influence.
• Public statements that move a contract's price can be classified by Kalshi as manipulation even without direct trading at the moment of the statement.
• Fines are climbing: from $2,590 to $172,000 depending on the scale of the manipulation and the violator's status.
• Refusing to cooperate with an investigation, as Santos did, results in a harsher penalty than admitting fault, as Buckhout did.

Regulatory pressure keeps building

Kalshi and Polymarket have pulled in billions of dollars in trading volume and mainstream attention over the past year, including from institutional investors who treat event contracts as a new asset class. That very boom is what drew the attention of federal regulators and lawmakers demanding proof that prices on these platforms are set by the market, not insiders. Over the past year both platforms grew from niche products into mainstream services used by retail bettors and large asset managers alike, and that growth has run in parallel with a rising number of conflict-of-interest investigations.

Kalshi has already rolled out additional compliance mechanisms in response to the growing scrutiny, though the company does not disclose details of exactly how it flags suspicious trading by event participants. In response to scandals like these, event-contract exchanges are revisiting trader verification procedures and stepping up monitoring of public statements from participants whose reputation could move a contract's price.

What comes next for the industry

Two penalties in one week are unlikely to slow the flow of capital into prediction markets, but they raise the legal risk for anyone who is both a participant in an event and a trader on a contract tied to it. For ordinary users, it's arguably a positive signal: platforms are showing they will publicly punish even influential players rather than bury conflicts of interest. For regulators, these cases are becoming a precedent for what enforcement should look like in the young event-contract industry. For politicians and public figures, the lesson is simpler: betting on a market tied to your own event now costs both reputation and money, even when the profit involved is just a few thousand dollars.