BitMEX Sued for Fraud Over Alleged Liquidation Engine Rigging as Exchange Announces Closure
Pioneering crypto derivatives exchange BitMEX has been hit with a federal fraud lawsuit in New York, accused of intentionally manipulating user liquidations to siphon millions of dollars in Bitcoin collateral into its own coffers just as the platform prepares to permanently cease operations.
Filed in the U.S. District Court for the Southern District of New York, the proposed class action by BKX Services Inc. and David Namdar seeks the return of more than 622 BTC—claimed to have been unfairly seized through forced liquidation mechanisms. According to court filings, BKX alleges a loss of at least 305.81 BTC, while Namdar claims damages exceeding 316.85 BTC.
At the center of the lawsuit is BitMEX’s aggressive leverage model, which allowed traders to amplify their positions by up to 100 times their initial collateral. The plaintiffs assert that the platform deliberately triggered automated liquidations while user collateral was still worth double the losses incurred, siphoning the residual Bitcoin directly into BitMEX’s corporate insurance fund.
In crypto derivatives markets, exchange insurance funds are engineered as systemic buffers to prevent auto-deleveraging when high-leverage trades close beyond their bankruptcy price. However, the lawsuit contends that BitMEX deliberately turned its reserve pool into a predatory revenue engine at the direct expense of its customers.
The complaint further alleges that BitMEX operated an internal market-making desk equipped with privileged access to non-public order book data. During volatile trading periods, when recurring server freezes allegedly prevented retail investors from submitting orders or mitigating risk, this internal desk remained operational, executing trades to capitalize on forced customer liquidations.
The legal action surfaced on the same day BitMEX owner HDR Global Trading announced a complete shutdown of the platform following an internal business review. The exchange, which launched in 2014 and gained dominance by introducing the perpetual swap contract to crypto markets, stopped accepting new user registrations immediately. BitMEX plans to block traders from opening new positions on Aug. 26 ahead of a final service termination on Sept. 23. Following the announcement, BitMEX’s native utility token, BMEX, suffered an immediate price collapse of roughly 90%.
The proposed class action aims to represent U.S.-based clients who traded Bitcoin swap products on the exchange dating back to July 23, 2018. Seeking compensatory and punitive damages alongside the recovery of the seized cryptocurrency, the filing revives multi-year concerns regarding the venue’s trade execution ethics. A previous class action filed against the exchange in 2020 by trader Brett Messieh under the Commodity Exchange Act brought similar claims before being voluntarily dismissed without prejudice.
