Kalshi ETH Perpetuals Face Wash-Trading Claims
Kalshi has rejected claims that wash trading inflated volume in its ETH perpetuals. The dispute followed reports of about $539 million in 24-hour volume against $3.1 million in open interest, implying turnover of roughly 174 times. Critics also said identical $5,500 trades accounted for up to 58% of notional volume on several days and questioned Kalshi’s market-maker incentives and self-clearing members.
Kalshi said the trades involved genuine counterparties with opposing views on fair value. It argued that active traders repeatedly took the profitable side while a market maker remained on the losing side, which is inconsistent with wash trading. The exchange said its fixed liquidity programme rewards qualifying two-sided quotes rather than trading volume, while its systems block self-trading and monitor possible pre-arranged transactions.
Kalshi added that repeated trade sizes may have come from one market maker posting fixed-size orders that were filled by many traders. It reported no evidence of collusion or wash trading. The exchange also disputed data interpretations, noting that some charts measured prediction-market share rather than perpetual-futures volume and that its contract-volume reporting is based on maximum payout rather than cash traded.
Kalshi launched crypto perpetuals on 3 June after approval of its BTCPERP contract. The products reportedly generated $5.5 billion in their first two weeks and have since attracted more than 350,000 traders. Open interest has doubled over the past 30 days. The allegations could still affect confidence in Kalshi ETH perpetuals and increase scrutiny of crypto derivatives surveillance, but no regulatory finding has established volume manipulation.
Neutral
The direct price impact on ETH is likely limited because the allegations concern trading activity on Kalshi rather than Ethereum’s spot or broader derivatives markets. In the short term, the unusually high turnover-to-open-interest ratio and repeated trade sizes could weaken confidence in Kalshi ETH perpetuals, reduce participation, and increase volatility if traders withdraw liquidity. However, Kalshi’s denial, its explanation of opposing counterparties and fixed liquidity incentives, and the absence of a regulatory finding leave the claims unproven.
For ETH, the longer-term effect is also likely neutral unless regulators or independent investigators confirm manipulation. Evidence of wash trading could damage confidence in crypto derivatives data and create temporary selling pressure, while a credible clearance could restore activity. Traders should monitor Kalshi volume quality, open interest, spreads, funding or pricing deviations, and any CFTC or other regulatory action rather than treat the reported volume alone as a reliable bullish or bearish signal.