Kalshi is facing allegations that activity in its recently launched Ether perpetual futures market may include artificially inflated volume after a quantitative trader identified a recurring pattern of approximately $5,500 trades. The allegation concerns Kalshi’s ETH perpetual contract rather than its broader prediction-market business, where the CFTC-regulated exchange has historically generated most of its activity. Kalshi has rejected the suggestion that the pattern establishes wash trading.
The critic, Beni, co-founder of Stealth Neolab, reported roughly $539 million in 24-hour ETH-PERP volume against approximately $3.1 million in open interest. His subsequent analysis found trades near $5,500 accounting for around 48% to 58% of ETH perpetual volume across several observation windows. The unusually repetitive sizing and high volume-to-open-interest ratio prompted questions about how much of the reported activity represents independent market demand, but neither metric identifies the counterparties behind the trades.
Repeated Trade Sizes Do Not Prove Wash Trading
Wash trading generally requires trades designed to create artificial activity without meaningful changes in economic exposure, typically through self-trading or coordinated counterparties. Repeated $5,500 executions can be a market-surveillance signal, but transaction size alone cannot establish that the same beneficial owner controlled both sides. Fixed-size algorithmic execution, market-making strategies or standardized risk limits can also produce repetitive trade patterns.
The fee structure has added another layer to the dispute. Kalshi’s CFTC-filed Temporary Perpetual Fee Rebate Program applies to Self-Clearing Members and reduces crypto-perpetual taker fees to 0.3 basis points while providing makers with a net 0.3-basis-point rebate. That structure can bring the combined maker and taker cost of an eligible trade toward zero, which Beni argued could reduce the economic friction associated with generating volume. The CFTC certified the updated program on September 16.
However, Kalshi’s filing directly addresses abusive trading. It states that transactions resulting from, or under investigation for, self-matching, wash trading, pre-arranged trading or other prohibited practices are ineligible for rebates. The filing confirms the incentive structure but does not show that prohibited trades occurred or that rebates were paid on the disputed activity. Kalshi also says it monitors participating firms and can revoke eligibility or initiate disciplinary proceedings.
Counterparty Data Is the Missing Evidence
Kalshi’s crypto lead has disputed the allegations and emphasized that Self-Clearing Member access is governed by regulatory requirements rather than discretionary selection by the exchange. He also argued that Kalshi publicly files incentive programs that offshore derivatives venues may negotiate privately. Those points explain the market structure but do not independently resolve who generated the repeated ETH-PERP trades, which remains the central factual question.
The reported $539 million volume versus $3.1 million open interest is also not proof by itself. High-turnover derivatives markets can produce trading volume many times larger than outstanding positions because the same contracts can change hands repeatedly during a session. A definitive wash-trading determination would require account-level matching, beneficial-ownership information, timestamps and surveillance records showing whether economically related parties repeatedly traded against themselves.
No CFTC enforcement action over these specific allegations had been announced as of September 21. The next meaningful milestone will be transaction-level evidence, a formal Kalshi surveillance finding or regulatory action that establishes whether the repeated $5,500 pattern reflects legitimate high-frequency activity or prohibited coordinated trading. Until then, the public data supports scrutiny of the volume pattern, but not a finding that Kalshi’s reported crypto volume is fake.
