Kalshi is facing intense scrutiny and potential CFTC investigation over allegations of wash trading on its newly launched crypto perpetual futures markets. Critics flagged that a single, repeating trade size of approximately $5,500 accounted for over half of Kalshi's ether perpetual volume, driving a massive discrepancy where 24-hour volume reached $539 million against just $3.1 million in open interest. Kalshi denies the claims, attributing the pattern to a single market maker's automated hedging strategy and defending its CFTC-filed incentive programs.
Repeating five thousand dollar trades
- ▪CoinDesk's analysis of Kalshi's public trade records from September 17 through September 20, 2026, showed that trades valued within $2 of $5,499 accounted for $7.7 million, or 57%, of the $13.5 million in ether perpetual-futures transactions
- ▪On Kalshi's bitcoin perpetual-futures market, two recurring trade sizes worth about $2,500 and $5,000 accounted for 54% of the $8.5 million in sampled data from September 17 through September 20, 2026
- ▪A repeating $5,500 trade pattern in Kalshi's ether perpetual futures market accounted for more than $5 billion in ether perpetual volume on Kalshi over the month leading up to September 22, 2026
- ▪A Wall Street Journal analysis of public trading data revealed that more than one-third of trades on Kalshi's ether perpetual futures market (ETH-PERP) in recent weeks consisted of rapid trades clustered around a $5,500 order size
Wash trading allegations
- ▪Beni alleged that the massive discrepancy between trading volume and open interest, combined with repeating $5,500 trades, is proof of wash trading and volume manipulation on Kalshi
- ▪Kalshi stated that it mechanically blocks traders from matching against themselves and monitors for coordinated trading, finding no evidence of collusion or wash trading
- ▪A pseudonymous quantitative analyst named Beni flagged that Kalshi's ether perpetual contract logged $539 million in 24-hour trading volume against an open interest of just $3.1 million, representing a turnover ratio of roughly 174 times
- ▪Kalshi denied wash trading allegations made by analyst Beni about its ether perpetual market, stating that the recurring $5,500 trades came from one market maker posting fixed-size orders under an incentive program, with hundreds of distinct traders taking the other side
Volume inflation concerns
- ▪A trading bot analyzed by prediction market analyst TickerTracker on Kalshi's Zohran Mamdani '2028 Democratic Presidential Nominee' prediction market, which bought shares for 0.2 cents and sold them for 0.1 cents every four seconds for almost two months, stopped trading after raising wash trading suspicions
- ▪Prediction market tool firm Resolve claimed to have made approximately $30 a day counter-trading the automated 'metronome' bot on Kalshi's Zohran Mamdani market
Kalshi fee structure defense
- ▪Kalshi's crypto product lead, IcoBeast.eth, argued that Kalshi's baseline fee structure deter manipulators, noting that the exchange does not pay rebates on its crypto prediction markets
- ▪A Kalshi rebate program filed with the CFTC that took effect on September 16, 2026, cut fees for self-clearing members to 0.003% and paid market makers a rebate of the same size, though Kalshi noted this program excludes suspected wash trades
CFTC regulatory scrutiny
- ▪According to The Wall Street Journal, Jump Trading and Wintermute were among the trading firms involved in the rapid, repeating $5,500 transactions on Kalshi's ether perpetual market
- ▪Jump Trading stated that it trades for profit, uses self-match prevention tools, and does not coordinate its trading activity with other traders on Kalshi
- ▪The Commodity Futures Trading Commission is examining the unusual trading activity involving nearly one million near-identical $5,500 ether perpetual futures trades on Kalshi to determine whether to open an enforcement investigation
Market mechanics volume calculation
- ▪Kalshi's crypto lead explained that Kalshi's high headline volume stems from an industry-wide convention where volume reflects the maximum potential payout of contracts ($1 per contract) rather than the upfront cash spent
- ▪Kalshi's ether perpetual market showed a volume-to-open interest ratio of 61 on September 21, 2026, meaning roughly 61 contracts changed hands for every contract left open, compared to a median ratio of eight across other Kalshi markets
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