A trader on X has accused Kalshi faces wash-trading claims over crypto volume, pointing to ETH-PERP activity that looked wildly out of line with open interest. Kalshi says the accusation mixes up prediction-market data with perpetual futures, and that distinction matters a lot.
- Huge volume vs. tiny open interest, suspicious, but not proof
- Kalshi says the chart was misread, prediction-market shares, not perps
- Rebates can boost liquidity, and also invite abuse if controls are weak
- The CFTC has warned on incentives, but has not publicly accused Kalshi here
The flare-up started on Sept. 20 when trader Beni posted on X that “Kalshi fakes their crypto volume and I can prove it.” He cited roughly $538.6 million in 24-hour ETH-PERP volume against about $3.1 million in open interest, which he said was a ratio of roughly 174 times. He also pointed to a Kalshi position leaderboard and said the largest position shown in his screenshots was $17, 598.
On its face, that kind of gap sets off alarms. In derivatives trading, volume is how much changed hands over a period, while open interest is the number of contracts still outstanding. High volume can be perfectly legitimate. But when turnover looks absurdly larger than open interest, traders usually want to know whether the market is genuinely active or just being churned for show.
That question gets even sharper when rebates are involved. Maker rebates reward traders who add liquidity to the book, and taker fees are what traders pay when they hit existing orders. Those incentives can make a market easier to trade. They can also tempt people to manufacture activity if oversight is sloppy. Crypto has seen enough fake-volume nonsense to justify a healthy dose of suspicion.
Kalshi’s response was not that wash trading is impossible. It was that the criticism may be aimed at the wrong product.
IcoBeast, identified as Kalshi’s crypto lead, replied on Sept. 20 on X that the Artemis chart Beni cited involved prediction-market share, not perpetual futures. That distinction is the core of the dispute. Prediction markets are bets on outcomes, usually measured in contract counts. Perpetual futures, or perps, are leveraged crypto derivatives with margin, funding payments, and no fixed expiry date.
If someone compares contract counts in one product to open interest in another, the comparison does not hold. That does not automatically clear Kalshi. It does mean the headline figures may not have been measuring what critics thought they were measuring.
Kalshi’s own glossary draws the line clearly. It defines prediction-market volume as the number of contracts traded during a period, while perpetual futures are separate products with margin, leverage, funding, and no expiry. In other words: same platform, different plumbing.
There is also an unresolved UI complaint in the mix. Beni alleged that Kalshi’s interface showed prediction-market contract volume beside a dollar sign, which he argued could make contract counts look like dollar volume. That is a serious claim, but it has not been independently verified from the available material. If true, it would be a bad look. Bad UI is not fraud, but it can absolutely make ordinary activity look far sketchier than it is.
Kalshi’s public filings show it is not blind to abuse risk. The company submitted a perpetual rebate program to the CFTC on Sept. 2 and certified it on Sept. 16. The program applies to all of Kalshi’s perpetual markets, including cryptocurrency and metals contracts, and is scheduled to run through Dec. 31 unless amended or ended sooner.
For cryptocurrency perpetuals, the filing says eligible taker fees are rebated down to 0.3 basis points, or 0.003%, while eligible makers receive rebates that leave them with a net 0.3-basis-point payment. Basis points are just hundredths of a percent, so this is tiny in percentage terms, but tiny fees can still matter a lot when markets are being scalped for volume.
Kalshi says it has guardrails. The filing excludes fees from transactions resulting from, or being investigated for, self-matching, wash trading, pre-arranged trading, or other abusive practices. It also says Kalshi’s Chief Regulatory Officer can revoke a participant’s program status and pursue disciplinary proceedings when warranted.
That lines up with the broader regulatory mood. On Aug. 12, the CFTC issued a staff advisory warning that incentive programs and steep volume thresholds can raise the risk of wash trading and pre-arranged transactions. The advisory did not accuse Kalshi of either practice, but the warning is obvious enough: when exchanges pay for volume, some traders will happily help themselves to the buffet and call it “liquidity.”
The CFTC separately reminded exchanges in CFTC Issues Advisory on Misuse of Nonpublic Information in February that wash sales, pre-arranged transactions, and noncompetitive trading can violate the Commodity Exchange Act. Again, that was general guidance, not a Kalshi-specific finding. As of Sept. 21, no public enforcement action reviewed in the available material accused Kalshi of wash trading in its crypto perpetual markets.
Kalshi has also been building out its surveillance stack. On Aug. 10, it announced a multi-year agreement with Nasdaq Market Surveillance, saying the system would cover both event contracts and perpetual futures and help identify manipulation, insider trading, and other abusive activity. That does not prove the market is clean. It does show the company understands that “trust us, bro” is not a compliance program.
The platform’s crypto push has moved quickly. Kalshi’s ETH perpetual market has operated since June, after the company introduced Ethereum perpetual futures shortly after its regulated Bitcoin perpetual contract began trading in the U.S. Kalshi has since expanded to Bitcoin and 17 altcoin perpetual products. crypto.news reported in June that Kalshi said perpetual volume exceeded $5.5 billion within the first two weeks of rollout.
That kind of early volume can mean real demand. It can also mean incentive-heavy churn. Usually it is some mix of both. The real question is whether the activity reflects durable liquidity or just a short-term race to harvest rebates and make the tape look busier than it is.
Comparisons to other venues make the rebate structure look less exotic and more like standard exchange plumbing. Hyperliquid’s fee schedule includes maker rebates, with rebates reaching negative 0.003% at the highest displayed maker tier. Binance’s Liquidity Hub also publishes maker programs for spot and futures markets, including negative maker fees for qualifying tiers in its U.S.-dollar-margined futures program. None of that proves anything about Kalshi’s market quality. It just means rebates are not some uniquely shady crypto invention.
Still, the suspicion is understandable. Bloomberg reported in February, citing people familiar with the matter, that Jump Trading was set to receive a small Kalshi equity stake in exchange for providing liquidity. There is also a separate publicly documented relationship in which Jump supplied liquidity for Kalshi’s first bespoke prediction-market block trade involving a carbon allowance contract. Liquidity providers are essential in new markets, but they also sit right at the intersection of legitimate market making and the kind of activity skeptics love to question.
Late in the dispute, Beni said he had received new non-public information and would delay another Kalshi thread for roughly 24 to 48 hours while consulting lawyers. The content of that information has not been disclosed, so there is nothing solid to hang on it yet. For now it is a teaser, not evidence.
The bottom line is narrower than the loudest X posts would suggest. There is enough here to justify scrutiny, especially around incentives, labeling, and market-surveillance controls. But the materials do not independently prove wash trading in Kalshi’s ETH-PERP market.
That is the uncomfortable truth with a lot of crypto market drama: suspicious-looking numbers are not the same as a smoking gun. Sometimes they point to fraud. Sometimes they point to sloppy comparisons, bad UI, or a market structure that rewards churn. The difference matters, and it is usually where the real story hides.
Key takeaways
-
Was Kalshi publicly accused by regulators of wash trading?
No public CFTC enforcement action reviewed in the available material accused Kalshi of wash trading in its crypto perpetual markets. The regulator has warned broadly about incentive-driven abuse, but that is not the same thing as a case against Kalshi. -
What did Beni actually compare?
Beni pointed to what he said was ETH-PERP volume and open interest, but Kalshi’s crypto lead said the chart in question was actually prediction-market share, not perpetual futures. If that rebuttal is correct, the comparison may have mixed up two different products. -
Why does the prediction-market vs. perp distinction matter?
Prediction markets track contract counts tied to outcomes. Perpetual futures are leveraged derivatives with margin and funding payments. Mixing those up can make a market look far stranger than it really is. -
Do Kalshi’s rebates create wash-trading risk?
Yes, they can. Maker rebates help attract liquidity, but incentive programs can also encourage artificial turnover if surveillance is weak or rules are poorly designed. -
Does Kalshi say it has controls in place?
Yes. Its filing excludes self-matching, wash trading, pre-arranged trading, and other abusive activity from rebate eligibility, and says its Chief Regulatory Officer can revoke program status and pursue discipline. -
What should readers watch next?
Any public clarification from Kalshi, any follow-up from Beni on the unverified UI claim, and whether the disputed volume figures can be matched to the correct product and metric. That is where the real answer will come from, not from the loudest screenshot on X.
Kalshi Sues Minnesota Over Prediction Markets Ban and has already shown how fast the company is willing to fight state-level resistance, and this dust-up lands in the middle of a wider legal war over what prediction markets are allowed to do.
That broader fight got even louder when Trump Backs Prediction Markets as CFTC, States Clash Over brought more political heat into the mix, turning what should be a technical debate about market structure into a full-blown food fight between federal and state authority.
Kalshi is also not sitting still on the lobbying front. Kalshi Backs Lobbying Push as Prediction Markets Face Legal underscores the obvious: when a new market is threatened by regulators and state bans, companies do not just build compliance. They start building political defenses too. Shocking, I know. Washington does love a nice, expensive shrug.
