Every lending market, every vault, every liquidation engine in DeFi runs on one assumption: the oracle knows the right price.
On October 10, 2025, that assumption broke. Nearly $19 billion in leveraged positions got liquidated in 24 hours, not because the assets were worthless, but because oracles fed stressed, thin market data straight into automated liquidation systems. The machines did exactly what they were told. The data was the problem.
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