Liquidation Cascades
The mechanical structure of cascading liquidations — Black Thursday, May 19 2021, August 2024 — what amplifies them, who profits, and why over-leverage creates correlated risk across the entire DeFi stack.
What a Cascade Is
When the price of a crypto asset drops, leveraged positions hit their liquidation thresholds. Each liquidation forces selling of the underlying collateral, which pushes the price down further, which triggers the next layer of liquidations. The process becomes self-amplifying. It can run for hours, transferring enormous wealth from leveraged longs to short sellers and liquidation keepers, often producing 20-40% price drops in single sessions. The most famous examples: Black Thursday (March 12, 2020, BTC -40%), May 19 2021 (~$10B liquidated), November 2022 (FTX week), August 5 2024 (Japan carry trade unwind + crypto crash).
The Mechanical Steps
Price drops 5%. Leveraged longs at high leverage hit liquidation. Exchange sells those positions, adding sell pressure. Price drops 5% more. The next leverage layer hits liquidation. Sell pressure compounds. Each layer of leverage liquidates the layer below it. Within minutes you can see 20%+ price drops on substantial volume — billions of dollars of leveraged exposure being force-closed. This is the cascade.
Why It Matters Even If You're Not Leveraged
Cascades don't care about your portfolio. If you hold spot ETH at zero leverage and a cascade drops the price 30%, your unrealised P&L drops 30%. Cascades are how 'I was just holding' people get wrecked too. The bigger structural concern: cascades affect everyone's wealth, even though they're triggered by the leverage of a small subset of traders. This is why prudent portfolio sizing and avoiding peak-FOMO entries matter — you don't control when cascades fire, only how much you suffer when they do.
- Cascades chain: each leverage layer's liquidations trigger the next
- Famous examples: Black Thursday, May 19 2021, August 2024 — billions liquidated in hours
- Spot holders suffer the same percentage move as leveraged traders
- Position sizing + buffer above liquidation prices is the only defence
Key Takeaways
- Liquidation cascades amplify price moves via forced selling of leveraged positions
- The mechanism is self-reinforcing and runs to exhaustion
- Cascades transfer wealth from leveraged longs to short sellers, keepers, and the eventual buyers at the bottom
- Spot holders are affected too — you suffer the same percentage drop without the liquidation event
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References & further reading
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