When more than $19 billion in leveraged crypto bets got wiped out in a single day, it wasn’t subtle. Oct. 10, 2025 went down as the largest forced unwind on record. Roughly 1.6 million accounts got caught in the cascade. Bitcoin and the broader market dropped hard as forced selling piled on forced selling.
The weapon of choice was the perpetual future. Perps are futures contracts with no expiry date, and they dominate leveraged crypto speculation. The wave was concentrated there. Liquidity, it turns out, can vanish fast when everyone crowds into the same trade. Who knew.
The mechanics are brutal. Liquidation means an exchange force-closes a leveraged position once margin no longer covers losses. No grace period. No phone call. Big moves trigger more forced selling, which triggers further drops, and the chain reaction can overwhelm market depth. Analysts pointed to rising mass liquidation risk in an over-leveraged market. Even a much smaller shakeout on October 15, 2026 saw about $942 million in liquidations, with roughly 91.6% long positions bearing the losses.
The warning lights were blinking. Positive funding rates mean longs pay shorts, which usually signals crowded bullish bets. Before the crash, BTC and ETH funding on major venues reportedly topped 8% annualized on many exchange-days. Deribit’s Bitcoin funding rate sat at 26.9% before the crash. By October 2026, it was near 7.1%.
Then came the hangover. Open interest in Bitcoin perpetual futures was about $45 billion a year before the crash. It more than halved in the months after. Across five major venues, total perp open interest slid to about $67 billion from $81 billion over the prior year. Galaxy reported futures open interest, including perps, fell 39.09% quarter over quarter in Q4 2025. On-chain perp volumes also fell for several months, reflecting lower speculative appetite.
Retail felt the pain. The liquidation wave reportedly hit many retail accounts, especially long positions. Ouch. Traders can cushion this kind of damage by using tiered stop-loss orders and adjusting leverage to their personal risk tolerance and market conditions.
Fast forward a year. Funding was materially lower and turned negative on some days. That suggests some deleveraging. But leverage remained elevated. CryptoQuant’s estimated leverage ratio reportedly rose again in early October 2026, signaling leverage rebuilding. Bitcoin perpetual open interest still hadn’t fully normalized.
Meanwhile, perps aren’t staying in their lane. Trading in stocks, indices, and commodities is growing rapidly, so the same no-expiry leverage machine is spreading well beyond crypto. Open interest in perpetual futures tied to real-world assets has grown to over $17 billion, with Hyperliquid pioneering links to stocks and commodities. Open interest remains a key gauge of speculative risk, and right now it’s flashing mixed signals.
Quiet recovery? Not quite. Less froth than before the crash, sure. But the appetite for leverage didn’t die. It just took a nap, apparently.
