Bitcoin ETFs log $643M Friday outflow, pushing October into the red after Binance hack

Bitcoin ETFs post first monthly outflows since June

Investors pulled $643 million from US-listed spot Bitcoin exchange-traded funds on Friday. The withdrawals pushed October's net flows into negative territory, leaving the funds with $515 million in net outflows for the month, according to SoSoValue data.

A spot Bitcoin ETF, or exchange-traded fund, is a fund that trades on a stock exchange and holds Bitcoin. It lets people invest in the asset without buying the coin directly. Friday's exit snapped four straight days of inflows and came as crypto markets faced volatility after Binance confirmed a major hack.

Key numbers from October's flows

• US spot Bitcoin ETFs recorded $643 million in net outflows on Friday.
• October ended with $515 million in net outflows, the first negative month since June.
• The funds still hold roughly $361 million in net inflows for 2026 through October.
• US spot Ether ETFs lost a net $156 million on Friday, bringing October's outflows to a record $1.61 billion.
• Bitcoin's price dropped to $77,000 on Thursday.

Which funds saw the biggest withdrawals

BlackRock's iShares Bitcoin Trust, known as IBIT, led Friday's outflows with $234 million. Fidelity's Wise Origin Bitcoin Fund followed with $201 million, according to Farside Investors data.

Security warning follows Binance's confirmed hack

Binance, described in the report as the world's largest crypto exchange by trading volume, confirmed on Friday that hackers had stolen about $6.3 billion in crypto assets. An exchange is a platform where people buy, sell, and trade cryptocurrency.

After the disclosure, Yishi, founder and CEO of hardware wallet maker OneKey, warned on X that IBIT could face similar security threats because it relies heavily on Coinbase to hold its Bitcoin. A hardware wallet is a physical device used to store crypto offline. This warning is Yishi's opinion, and no security incident at IBIT or Coinbase was reported in the source.

Ether ETFs set a record for monthly outflows

US spot Ether ETFs also saw heavy withdrawals in October. The month's $1.61 billion in net outflows is the largest on record for the funds, topping the previous high of $1.42 billion set in November 2025.

October's losses erased the Ether funds' net inflows for 2026, leaving them with roughly $45 million in net outflows for the year.

What is confirmed and what remains a claim

The flow figures come from SoSoValue and Farside Investors data, and Binance itself confirmed the roughly $6.3 billion theft. Bitcoin's drop to $77,000 on Thursday was also reported.

Yishi's statement that IBIT could face similar threats remains an unconfirmed claim posted on social media. The source does not report any breach affecting the ETF or its custodian.

Sources

• Cointelegraph