Bitcoin ETFs shed $643 million in largest daily outflow since June

US spot bitcoin exchange-traded funds shed $643 million on 30 October 2026, their biggest single-day outflow since June. The sell orders wiped out four days of inflows and dragged bitcoin toward $77,000.

Farside Investors put the net withdrawal at $643.2 million. SoSoValue, a separate data provider, logged $643.33 million. Two firms, counting independently, landed within a few hundred thousand dollars of each other.

Spot ETFs have been the steadiest source of new money into bitcoin since early 2024, so a day this red draws attention beyond the usual price chatter. When the funds buy, they absorb supply. When they sell, that cushion thins.

Where the money came out

BlackRock's IBIT took the hardest hit, with $233.7 million in redemptions. Fidelity's FBTC lost $201 million, and the ARK 21Shares fund, ARKB, lost $129.5 million. Those three funds made up $564.2 million, or about 87.7 percent of the day's total, according to Farside figures reported by crypto.news. Grayscale's GBTC and Bitwise's BITB accounted for most of the rest.

Not every fund was bleeding on the month. IBIT still took in a net $932.1 million across October even after the 30 October redemptions, and the US spot bitcoin ETFs have drawn $57.048 billion in all since they launched in January 2024. The down day was sharp. It was not structural.

It was the heaviest single day since June. Farside's tally narrowly topped the $635.6 million that left on 22 October, and the year's record daily outflow still stands at $691.7 million, set on 25 June.

The scale is easier to grasp against the week around it. Over the four sessions from 26 to 29 October, the same funds had pulled in $440.8 million. One day erased it all. The week closed with a net outflow of $202.4 million.

That pace of selling has become familiar. Bitcoin ETFs saw a $773 million two-day exit the week before, when the price slipped below $82,000.

The sell-off spread beyond bitcoin

Bitcoin was not selling off alone. US ether ETFs lost $155.7 million on 30 October, their fifth straight day of withdrawals, and closed the week down $431.4 million. Smaller products followed. Solana ETFs gave up $10.7 million on the day. A Grayscale zcash fund lost $4.57 million, ending an eight-session inflow run, and an XRP product shed about $496,500. The pattern was broad, which is what a risk-off move looks like.

Ether has had the rougher month. Its US funds lost about $1.61 billion across October, far more than bitcoin's $515.9 million, and the latest week's exit outpaced the $220.7 million that had left over the prior five sessions.

What set it off

Traders tied the exit to a reported security breach at Binance, one of the world's largest crypto exchanges, late in the week. The timing lines up. Whether the two are connected is a read of the calendar, not a stated fact. Neither the ETF issuers nor Binance has linked the fund redemptions to the incident.

Frederik Theissen of Glassnode, the on-chain analytics firm, described ETF trading as subdued in the days before the withdrawals, crypto.news reported. The breach gave a nervous market a reason to move.

Yishi Wang, founder of wallet maker OneKey, warned that large bitcoin vehicles such as IBIT could in theory attract sophisticated attackers, bitcoin.com reported. He offered it as a hypothetical. There is no evidence any ETF has been targeted.

A single red session does not reverse a year. The funds have absorbed worse and recovered. October's full-month net outflow of about $515.9 million is smaller than the summer's worst stretches, when the single worst day in June topped $691 million on its own.

What it means for ETF holders

Glassnode estimated the average bitcoin bought through US spot ETFs cost about $81,500, in a report dated 28 October. With the price near $77,000, the typical ETF position sat underwater. The firm's broader measure of active investors' average cost, its True Market Mean, stood near $77,900, close to where bitcoin was trading.

Combined net assets in the US bitcoin funds slipped to $98.14 billion on 30 October, back under $100 billion, bitcoin.com reported from SoSoValue data. Trading volume ran near $6.35 billion, about three times the level of the day before.

A word on what these numbers are. An outflow does not mean coins were dumped on the open market one for one. When investors redeem ETF shares, the fund returns cash and releases the underlying bitcoin through authorized firms, and that bitcoin can be sold, held or moved. Flows signal demand. They are not a tick-by-tick record of selling.

What the figures do not show is who sold. Flow data captures the net movement of money, not the names behind it. Whether the sellers were pension funds, financial advisers or trading firms rebalancing is not public.

For readers weighing an ETF against holding bitcoin directly, days like this are a plain reminder. The fund wrapper does not soften the price move.

What to watch

Flows lead. Price follows. The next few sessions decide whether 30 October was a one-off flush or the start of something longer. One clean day of inflows would suggest buyers stepped back in. A second heavy outflow would say the opposite. Glassnode's $77,900 line is worth watching, because bitcoin has spent the week near the average cost of the investors still active in it. Below that level, more holders sit on paper losses. Paper losses are what turn into sell orders.