Investors withdrew $643.33 million from US spot Bitcoin ETFs on October 30, according to SoSoValue data. The outflow occurred one day after a significant security breach at Binance, the world's largest cryptocurrency exchange.
These exchange-traded funds allow brokerage customers to hold Bitcoin similarly to traditional stock ownership. The funds collectively held $98.14 billion in assets before Friday's withdrawal, which ended a four-day streak of inflows.
Which Bitcoin ETFs Saw the Largest Exits
BlackRock's iShares Bitcoin Trust (IBIT), the largest Bitcoin ETF, experienced a $234 million outflow. Funds managed by Fidelity and Ark Invest posted the next-largest withdrawals.
When investors redeem shares, large trading firms exchange fund shares for Bitcoin or cash, potentially allowing the funds to release coins to the open market.
Ethereum ETFs also faced pressure, losing $156 million the same day and marking their fifth consecutive day of outflows.
Scale of the Binance Security Breach
On October 29, attackers transferred approximately $6.36 billion out of Binance's exchange wallets across 10 blockchains, according to analytics firm TRM. Most funds were moved within approximately 20 minutes.
TRM attributed the theft to TraderTraitor, identified as a North Korean hacking unit. The stolen amount is roughly four times the previous record of $1.5 billion from the Bybit hack in February 2025.
Binance suspended deposits and withdrawals and stated that user funds remained secure. Token issuers and network operators froze approximately $2.7 billion of the stolen assets, according to TRM.
Comparing Friday's Outflows to Historical Patterns
Friday's $643.33 million withdrawal represented approximately 0.7% of assets held in Bitcoin ETFs. A similar exit occurred on October 22, when investors pulled $635 million in a single day. Inflows resumed for four consecutive days beginning October 26.
Following the previous record hack in February 2025, Bitcoin ETF outflows were more severe. A week after the Bybit theft, investors withdrew a then-record $1 billion in one day, with weekly outflows approaching $3 billion.
Bitcoin Price Performance and Market Context
Approximately $11 billion in Bitcoin options expired on October 30. Bitcoin's price stood at $77,189, down 1.7% over 24 hours as of the report date.
Bitcoin declined 7.3% during October, continuing a pattern of weakness in the month. October 2025 also saw a 3.95% decline for the cryptocurrency.
Bitcoin has experienced back-to-back losing Octobers only once before in its history, which occurred in 2011 and 2012. Historical data indicates Bitcoin's average October return is 26%.
