XPL Flash Crash Post-Mortem: 16 Linked Wallets Drained Margin, HLP Suffers $550,000 Loss

XPL flash-crashed 18% in one minute on Hyperliquid on November 1 at 12:32 Beijing time, while BTC fell just 0.04%, forcing HLP's liquidation vault to absorb roughly $12.18 million in XPL longs within 10 seconds and sell them off over 75 minutes at a loss of about $556,000. A post-mortem by filo, a Quote Markets team member and former JPMorgan employee, found 16 linked wallets—14 traceable to four USDC funding chains on Arbitrum with identical order timing—held about 269 million XPL in longs worth roughly $23.09 million, with each wallet kept below the $3 million threshold that triggers higher margin requirements. About 8 minutes before the crash, 12 of these wallets withdrew roughly $2.04 million in margin (with 7 more withdrawal attempts rejected for insufficient balance), and those 12 wallets accounted for 90.7% of the positions absorbed by the liquidation vault. However, XPL had already dropped about 6% before Hyperliquid's first liquidation, and Binance perpetuals saw heavier volume with 75.9% sell-side pressure, so public data cannot confirm who initiated the dump. The 16 wallets lost about $711,000 in total on Hyperliquid, and whether they hedged on other platforms is unknown. Hyperliquid has not yet issued a statement, making its response and any potential changes to margin-withdrawal rules the key items to watch.