Bitcoin liquidity halved since Sept. 2025; markets fragile

Six months after the Oct. 10, 2025 flash crash, Bitcoin’s orderbook depth has fallen roughly 50% from September 2025 levels and now rarely tops $130 million. Derivatives activity and exchange-traded fund volumes have also declined over the same period.

On Oct. 10, 2025, the cryptocurrency market experienced a sharp sell-off that eliminated about $19 billion in leveraged positions. Many altcoins lost between 40% and 80% of their value. Technical problems at a major centralized exchange and automatic deleveraging on decentralized venues reduced available liquidity that day. Traders reported the withdrawal of several market makers and abnormal executions during the episode.

In September 2025, aggregate Bitcoin orderbook depth within a +/-1% price band typically ranged from $180 million to $260 million, with roughly $90 million in bid support on many days. After the October crash, the measure declined to around $150 million by mid-November 2025 and has continued to trend lower. In February 2026, orderbook depth fell below $60 million for nearly ten days while Bitcoin traded near the $65,000 level.

Cryptocurrency derivatives volumes have weakened. Total trading volumes measured over recent 30-day windows have varied between about $40 billion and $130 billion, below the roughly $200 billion observed in September 2025. The Bitcoin perpetual futures funding rate, which reflects the cost of holding leveraged long positions relative to shorts, was within an annualized 6%–12% range through November 2025 and then declined sharply in February 2026. When the funding rate falls below 0%, traders holding short positions pay those holding long positions.

U.S.-listed spot Bitcoin ETFs did not show an immediate drop after the October crash. Daily trading in those ETFs rose to about $11.5 billion by late November 2025. Between January and March 2026, BTC ETFs frequently traded above $4 billion per day but fell below $3.3 billion in the first week of April. U.S.-listed Ether ETFs saw average daily volumes around $1 billion in this period, down from about $2 billion in September 2025.

Orderbook depth, shifts in the funding rate, lower derivatives turnover and reduced ETF volumes are all smaller in April 2026 compared with six months earlier. Market-structure metrics remained relatively stable through February 2026, while the largest declines in some measures occurred in early 2026.

Orderbook depth measures the amount of buy and sell interest close to the current price. The funding rate shows whether traders are paying to hold long or short positions in perpetual futures. Traders and analysts use these metrics to assess liquidity and stress in crypto markets.