Prediction market exchange Kalshi has permanently banned former United States Representative George Santos and hit him with a 71,356 USD penalty after an internal investigation found he manipulated contracts tied to his own attendance at President Donald Trump’s 2026 State of the Union address.
The disciplinary notice, dated August 28, 2026, determined that Santos earned 17,839.57 USD by trading contracts whose outcome depended entirely on whether he showed up to the event, making him the first person ever permanently banned from the exchange.
## Trading an Outcome He Controlled
Kalshi Rule 5.17(z) prohibits members from trading contracts when they can influence the underlying outcome. As the person whose attendance determined the payout, Santos sat in a uniquely conflicted position, and the exchange says he exploited it anyway.
Between February 2 and February 25, according to the notice, Santos bought and sold both Yes contracts, which paid if he attended the address, and No contracts, which paid if he stayed away. During the same period, he published several statements about his travel plans that Kalshi described as false or misleading, timed to move prices before he traded.
The exchange found violations of its rules against market manipulation, trading on material nonpublic information, trading on an outcome a member can influence, and running a deceptive scheme connected to exchange activity. Santos also failed to cooperate promptly with the internal investigation, the notice said.
The penalty of 71,356 USD works out to exactly four times the profit listed in the filing. Under the settlement, Santos is barred from accessing Kalshi either directly or indirectly, including through another person or account.
## The Play-by-Play From Regulators
A separate Commodity Futures Trading Commission order issued on July 31 lays out the timeline in remarkable detail. Santos opened his Kalshi account on February 11 and deposited roughly 7,000 USD, using it exclusively to trade on his own attendance.
From February 12 to 22, he accumulated 30,874 Yes contracts at a total cost of 6,695.94 USD. While holding the position, he asked his followers on X whether he should wear a serious suit or a bedazzled one to the address. The post sent the Yes contract from about 0.15 USD to 0.70 USD, and Santos sold the entire position for a 3,448.43 USD profit, withdrawing 10,146.07 USD through a Venmo account created four days earlier.
The pattern repeated. When his flight to Washington was canceled on February 22, Santos booked a train, then posted the next morning that bad weather had made his trip difficult, suggesting the address might not take place. The Yes price fell from 0.63 USD to 0.28 USD. That evening he posted he would attend from the House gallery, and a video repeating his plans pushed the contract back up to 0.70 USD.
Roughly 40 minutes after publishing the video, Santos began buying No contracts, eventually acquiring 23,855 of them for 8,650.66 USD. When he posted on February 24 that he was watching the address on an airport television, with both his flight and train canceled, the Yes contract collapsed from 0.73 USD to 0.02 USD, inflating the value of his opposing position. He closed the No trade early on February 25 for a 14,390.57 USD profit.
## Two Enforcement Tracks, One Message
The Kalshi sanction runs parallel to the CFTC settlement rather than replacing it. The federal regulator ordered Santos to disgorge 17,569.98 USD, pay a 17,500 USD civil penalty, and accept a three-year trading ban across all CFTC-registered entities. Santos consented to the July order without admitting or denying the findings.
The CFTC applied Section 6(c)(1) of the Commodity Exchange Act and Regulation 180.1, which prohibit manipulative and deceptive conduct involving swaps. Notably, the order classified the State of the Union event contracts as swaps because their payouts depended on a future event with potential financial and commercial consequences, a framing that extends classic derivatives law into the prediction market era.
Although Kalshi faulted Santos for failing to cooperate with its inquiry, the CFTC actually credited his cooperation in the federal investigation, reflecting the two separate reviews conducted by the exchange and its regulator. Federal investigators had begun examining the trades in June after Kalshi froze the account and referred the activity to authorities.
## Why It Matters for Prediction Markets
The case arrives as prediction markets fight for legitimacy in Washington. Kalshi has positioned itself as a regulated alternative to offshore betting platforms, and a permanent ban of a former congressman for self-referential market manipulation is a public demonstration that the venue intends to police itself.
For traders, the message is blunt: if you are the event, you cannot be the market. And for a young industry still arguing it deserves mainstream trust, the Santos affair is both an embarrassment and, handled this decisively, something of a credential.
trading contracts on his OWN attendance and still only made 17k. loser in every sense of the word
he had one job, literally just show up or not show up, and still managed to fumble it into a 71k fine
man made 17,839 dollars betting on his own attendance and still ended up owing 71k. peak politician ROI
the detail people skip is he bought AND sold both Yes and No contracts between Feb 2 and Feb 25. not even a clever scheme, just completely brazen
only reason this works as a deterrent is the fine is 4x the profit. anything less and it becomes just a trading fee lol
Rule 5.17(z) doing exactly what it was written for. Every exchange should publicize enforcement like this instead of quiet settlements
Genuinely curious how Kalshi even caught it. Internal cross-referencing of statements against trade timestamps? Impressive surveillance either way
notice says his public travel statements contradicted his own fills. dude basically snitched on himself in real time
made 17k off it and the penalty was 71k. four x your gains just to get permabanned, genuinely the worst roi of his career
Rule 5.17(z) feels oddly specific for a rule that presumably did not exist before this week. Exchanges are writing market regulations faster than Congress manages to.
first ever permanent ban on kalshi and it is a sitting-then-expelled congressman. wild timeline