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Hyperliquid's xyz:SKHYNIX perpetual briefly fell ~20% after a "black swan" pre-market trade in South Korea priced a single SK Hynix share at KRW 1.272 million, triggering a roughly 30% move and a trading halt in the underlying market.
What's the Scoop?
- Who Operates the Market: Trade.xyz operates the market, who are investigating the issue. In their response,
Hyperliquid made clear that it was Trade's responsibility to resolve this as Hyperliquid is a permissionless chain, and under HIP-3, independent teams can deploy and run their own markets using it as infrastructure. - How HIP-3 Pricing Works: Each market's price comes from three inputs, and the deployer controls two of them. Hyperliquid itself supplies only one, drawn from onchain trading activity. Because the final price is the median value of the three, whatever the deployer pushes effectively decides it. If Hyperliquid's onchain input reads 100 but the deployer submits 150 and 151, the market prices at 150.
Today, a single share sale triggered millions of dollars in liquidations on Hyperliquid.
— Markets Alpha (@MarketsAlpha) July 28, 2026
At 11:00 pm UTC on July 27, $SKHYNIX suffered a flash crash on Hyperliquid, falling roughly 20% within seconds before rapidly recovering.
The entire cascade began with a single share sold… pic.twitter.com/quFIo2o1Lc
