Kalshi Faces Wash-Trading Claims Over ETH Volume
Kalshi is facing wash-trading allegations after trader Beni highlighted about $538.6 million in 24-hour ETH-PERP volume against roughly $3.1 million in open interest, a ratio of approximately 174 times. He also questioned a reported top position of only $17,598 and argued that Kalshi may be overstating crypto activity.
Kalshi crypto lead IcoBeast rejected the claims, saying Beni had conflated crypto prediction-market volume with perpetual-futures volume. Kalshi’s documentation treats the products separately. Prediction markets count contracts traded, while perpetual futures use margin, leverage and funding payments.
A September Kalshi filing confirms a temporary crypto-perpetual rebate programme. Eligible takers can pay 0.3 basis points after rebates, while eligible makers receive rebates resulting in a net 0.3-basis-point cost. However, the filing excludes self-matching, wash trading, pre-arranged trades and other abusive activity from rebate eligibility. It does not prove that rebates were paid on suspicious trades.
No CFTC enforcement action reviewed as of 21 September has accused Kalshi of wash trading in its crypto-perpetual markets. The CFTC has warned that aggressive incentive programmes can increase wash-trading risks and has urged exchanges to use real-time surveillance and strong audit trails. Kalshi says its Nasdaq Market Surveillance agreement covers event contracts and perpetual futures.
The allegations remain unverified. Traders should monitor ETH-PERP liquidity, open interest, funding, spreads and any regulatory response rather than treating the claims as established misconduct.
Neutral
The immediate market impact is likely neutral because the allegations concern Kalshi’s trading data rather than Ethereum’s network fundamentals or spot-market supply and demand. No CFTC enforcement action or independent audit has confirmed wash trading, and Kalshi has publicly disputed the claims.
In the short term, the dispute could increase volatility in ETH-PERP if traders reduce liquidity, widen spreads or demand higher risk premiums. A regulator inquiry, evidence of artificial volume or suspension of the rebate programme could weaken confidence in Kalshi and reduce activity on its derivatives venue. Conversely, verified surveillance data or a credible explanation of the volume-to-open-interest ratio could restore confidence.
The rebate structure is a risk factor to monitor. Similar maker-rebate and volume-incentive programmes on crypto exchanges have historically raised concerns about inflated turnover, although high volume relative to open interest is not conclusive evidence of wash trading. In the longer term, confirmed misconduct would increase regulatory and counterparty risk for prediction-market derivatives and could pressure volumes across related venues. If the claims remain unsubstantiated, the episode is more likely to have a limited, venue-specific effect than a broad impact on ETH or the wider crypto market.