Incident Summary
Published 7/28/2026, 8:01:45 AM
The $80M liquidation event in $SKHX (SK Hynix perpetual futures) on July 28, 2026, was triggered by a "fat finger" order mistake involving a single share on the South Korean NXT pre-market exchange. This abnormal trade caused a limit-down execution that Hyperliquid's price oracles ingested, resulting in a sudden 17.9% flash crash in the perpetual market and a massive liquidation cascade for leveraged long positions [Source: https://www.weex.com/news/detail/sk-hynix-faces-128-million-liquidation-due-to-order-mistake-joq9c12u6xlndoechiwjuxbv].
Incident Summary
| Metric | Details |
|---|---|
| Trigger Event | Single abnormal order for 1 share of SK Hynix on NXT pre-market [Source: https://www.weex.com/news/detail/sk-hynix-faces-128-million-liquidation-due-to-order-mistake-joq9c12u6xlndoechiwjuxbv] |
| Execution Price | 1,272,000 KRW (~$867 USD), a 29.96% drop from the previous close [Source: https://www.weex.com/news/detail/sk-hynix-faces-128-million-liquidation-due-to-order-mistake-joq9c12u6xlndoechiwjuxbv] |
| Hyperliquid Impact | 17.9% flash crash; price dropped from ~$1,130 to below $930 [Source: https://x.com/lookonchain/status/2081986404918403339] |
| Total Liquidations | Estimated between $80M and $128M [Source: https://gate.com/news/detail/hyperliquid-skhx-experiences-a-179-flash-drop-triggering-liquidations-that-23011508] |
| Recovery Time | Price returned to normal levels (~1,700,000 KRW) within 2 minutes [Note: not independently confirmed] |
Root Cause and Mechanism
The liquidations were the result of a specific chain of events involving oracle pricing and market liquidity:
- Oracle Vulnerability: Hyperliquid’s SKHX perpetual contract tracks the Seoul-listed common shares. The platform's oracle accepted the single-share abnormal trade on the NXT exchange as a valid price point, likely due to thin liquidity during the pre-market opening [Source: https://www.weex.com/news/detail/sk-hynix-faces-128-million-liquidation-due-to-order-mistake-joq9c12u6xlndoechiwjuxbv].
- Liquidity Gap: The incident reportedly occurred at approximately 7:00 AM UTC, a period of low trading volume where the order book could not absorb the sudden shift in mark price [Note: not independently confirmed].
- Liquidation Cascade: The 17.9% price gap immediately breached the maintenance margin for high-leverage long positions. For example, one trader (address
0xc985) saw a $2.08M long position fully liquidated, resulting in an instant $260,000 loss [Source: https://x.com/lookonchain/status/2081986404918403339].
Market Response
In response to the disruption, the NXT exchange announced plans to implement a Static Volatility Dampening Mechanism (VI) by September 2026 to prevent single-share errors from impacting broader market prices [Source: https://www.weex.com/news/detail/sk-hynix-faces-128-million-liquidation-due-to-order-mistake-joq9c12u6xlndoechiwjuxbv]. While the price recovered quickly, the event has led to calls for more robust oracle filtering on decentralized platforms to ignore extreme outliers in low-volume environments [Source: https://gate.com/news/detail/hyperliquid-skhx-experiences-a-179-flash-drop-triggering-liquidations-that-23011508].