Kalshi's crypto perps draw wash-trading accusations; its product lead says the volume math is being misread

Kalshi, the CFTC-regulated U.S. prediction market, is defending its newly launched crypto perpetual futures against allegations of inflated or fake trading volume, according to CoinDesk.

The accusation came from Beni, a quant analyst and co-founder of Stealth Neolab, who posted on X that Kalshi's ether perpetual showed roughly $539 million in trading volume against about $3.1 million in open interest — a ratio of about 174 to 1. A volume figure that far above the money actually at stake is, he argued, a textbook signature of wash trading. He pointed to repetitive $5,500 trades that he said accounted for up to 58% of ether perp volume across four separate days, calling it "undeniable proof" of manipulation. He also flagged a CFTC-filed fee schedule under which some Self-Clearing Members can net out to zero — a 0.3-basis-point maker rebate offsetting a 0.3-basis-point taker fee — arguing that zero-cost trading removes the disincentive to inflate volume.

Kalshi's response came from IcoBeast.eth, who leads product development there and replied on X. He said Kalshi's high headline volume follows the same convention Polymarket uses: each contract is tracked by its maximum $1 payout, not upfront cash. Buy 100,000 contracts at 30 cents and you spend $30,000 but the system logs $100,000 in volume. He said Beni had also misread an Artemis chart that measured prediction-market share, not perp volume. On the fee point, he said "fair access" is a legal requirement for a CFTC exchange — anyone meeting the capital and operational bar can become a Self-Clearing Member — and that Kalshi offers no rebates on its crypto event contracts. He acknowledged U.S. perps are "early days" but said Kalshi must file its incentive programs publicly, unlike offshore venues.

CoinDesk said it asked Kalshi for comment and did not receive an immediate response.

Key facts

• Ether perp volume ~$539M vs. ~$3.1M open interest, a ~174x ratio (Beni, via CoinDesk).
• Repetitive $5,500 trades said to be up to 58% of ether perp volume over four days (Beni, via CoinDesk).
• CFTC-filed schedule: 0.3 bp maker rebate, 0.3 bp taker fee, netting zero for some Self-Clearing Members (Beni, citing the filing, via CoinDesk).
• Kalshi says volume tracks maximum payout, matching Polymarket's method (IcoBeast.eth, via CoinDesk).

The real-world read

This rests on a single secondary report relaying two dueling X threads, and it isn't resolved. The payout-convention explanation plausibly accounts for a large headline number — but it does not, on its face, explain a 174x volume-to-open-interest ratio or the clustering of identical $5,500 trades, and the account here shows no direct rebuttal of that specific pattern. Kalshi's public defense came from an employee on social media; the company itself declined to comment on the record. Watch the "transparency" framing on both sides: filing incentives with the CFTC makes them visible, but visibility of a rebate schedule is not the same as proof that observed volume is organic.

Not financial advice.

Sources: CoinDesk (Tier 2, secondary), "Kalshi faces 'fake crypto volume' allegations," 2026-09-21 — relayed the allegations from Beni/Stealth Neolab and the rebuttal from Kalshi's IcoBeast.eth, both originally posted on X, plus references to a CFTC-filed fee schedule (primary sources not independently reviewed here).