Two insider cases we've recently closed

2026-02-271:504166news.kalshi.com

Kalshi outlines two recently closed trading violation cases, explaining how its surveillance systems flagged violations, froze accounts, and imposed penalties to safeguard fairness on a regulated…

As a regulated exchange, we ban insider trading. In the past year, we’ve opened 200 investigations and frozen a number of flagged accounts. Of those investigations, over a dozen have become active cases.

We’ve received questions from customers about how we identify violations and enforce our rules. So, we’re releasing information about two insider trading cases we’ve recently closed. Investigations take time, and there will be more that we’ll disclose on our notices page, similar to how CME Group and others do.

  1. The first concerns a candidate who traded about $200 on his own candidacy for Governor of California, and then posted about it on social media, a violation of several Kalshi rules. Punishment: 5-year ban + financial penalty (10 times the initial trade size). Note: this candidate recently announced he is no longer running for Governor and is now instead running for Congress.

  2. The second concerns an insider who traded about $4,000 on YouTube streaming markets, a violation of Kalshi’s insider trading rules. Punishment: 2-year suspension + financial penalty (5 times the initial trade size).

In both of these cases, our systems flagged the trades and our surveillance team froze the traders’ accounts. Neither trader withdrew any profits. These penalties are not indicative of future penalties - everything depends on the case, including amount traded and rules violated.

We’ve reported each of these cases to the CFTC, as we are required to do, and Kalshi will be donating the fines imposed to a non-profit that provides consumer education on derivatives markets. We also recently announced an independent Surveillance Audit Committee, which will produce a quarterly report of statistics on flagged trades, open and closed investigations, and cases referred to the government for further enforcement.

Here’s more on how we flagged and investigated these cases: 

1/ In May, our Surveillance Department saw an online video by a candidate for Governor of California that appeared to show him trading on his own candidacy. We immediately froze his account and opened an investigation. The candidate was initially cooperative and acknowledged that this violated the exchange rules. As a candidate in a race, you can (and probably should) follow and use Kalshi’s market forecast, but you should not trade on it. 

2/ The second case involved trading in markets on a popular YouTube streamer’s videos. Our surveillance systems flagged his near-perfect trading success on markets with low odds, which were statistically anomalous. At the same time, because all trading data is publicly available, a number of Kalshi users sent us tips about unusual activities they saw in the trading data. We investigated and found that the trader was employed as an editor for the streamer’s show and likely had access to material non-public information connected to his trading. 

In both cases, our team collected evidence, applied Kalshi’s disciplinary process fairly, and concluded there was sufficient evidence that a trading violation occurred. No system is perfect. No financial exchange is immune from bad actors. Not stock exchanges, not banks, not prediction markets. We’re committed to deterring and finding the bad actors, manipulators, and those who willingly cheat.

Follow Kalshi on X: @Kalshi


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Comments

  • By rootsudo 2026-02-273:263 reply

    This corporate messaging piece really falls flat.

    So they caught $4000 and $200. Sounds very much like sacrificial pieces.

    “yes but see they don’t tolerate insider trading!”

    That’s it? One from a social media post by the own person who did it, and another in a slim market and had tips come in?

    So it basically comes down to:

    1. Don brag about doing something, that I’m not quite sure is illegal but supposedly breaks kalshis terms of service (oh no)!

    2. Instead of operating in a thin t̶r̶a̶d̶i̶n̶g̶, sorry, prediction market pool, stick with ones that enable more plausible deniability?

    If anything there should be more regulation against prediction markets like Kalshi or even elimination.

    • By hpdigidrifter 2026-02-279:471 reply

      Someone dropped $100k polymarket on US attacking Iran that day, it sent the whole place into a frenzy.

      There's degeneracy and then there's insiders and that's how these places work.

      This account had no prior trades.

    • By comex 2026-02-277:20

      At least they don't allow insider trading like Polymarket does!

    • By skeptic_ai 2026-02-274:161 reply

      lol definitively the small fish. What’s 200 and 4000 in the total? 0.0000000001%? And they only catch because one was bloating on their social media.

  • By oofbaroomf 2026-02-273:423 reply

    "Prediction" markets were supposed to be great because of insiders: they make the probabilities much more accurate and actually useful for forecasting.

    But they ended up just being for gamblers and there is no more signal.

    • By Balgair 2026-02-2713:45

      Prediction markets are a great idea, but in practice their users (and eventually their owners) only want sports gambling. The addiction overrides everything.

      We're sooo screwing over an entire generation of men.

    • By YokoZar 2026-02-2710:001 reply

      You may be interested in "Do Morons Make Prediction Markets More Accurate?" - https://nicholasdecker.substack.com/p/do-morons-make-predict...

      Essentially the argument is that more dumb money in a prediction market provides an even stronger incentive for smart money to join, moving the price back to an accurate probability.

      • By duxup 2026-02-2713:541 reply

        Isn't the smart money incentive there because the market is wrong?

        That also seems to assume that there’s enough smart money (and smart information) to balance things out. I’m not sure about that.

        • By skybrian 2026-02-2715:23

          In a larger market, traders can make money off smaller price discrepancies.

    • By tototrains 2026-02-273:501 reply

      I regularly check geopolitical markets to see if a breaking news story is substantial or not, and find it useful. It can help distinguish between propaganda and intelligence there.

      It does seem like there could be a distinction between markets which require genuinely knowledge and analysis (geopolitics), versus pure gambling (sports, crypto up/down 5 minutes, etc), but I'm not sure who's going to bother making it.

      • By William_BB 2026-02-278:401 reply

        (Geopolitical) prediction markets almost always tend to overreact. This is expected from retail, so I'm not sure about the signal.

        • By echoangle 2026-02-278:56

          So why not just always bet against their reaction? Over time you should make money then, right?

  • By dgrin91 2026-02-274:17

    So they caught 2 very small cases and both cases were literally posting publicly about how they were doing a thing against the rules. Seems like they can't actually do anything if the culprits aren't total idiots?

    Also what is this 5x payment penalty? What mechanism do they have to enforce this?

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