U.S. spot Bitcoin exchange-traded funds have just come through their most severe withdrawal cycle since launch. According to the TechFlow report by Claude, the products recorded 13 consecutive trading days of net outflows from May 15 to June 3, with about $4.37 billion leaving the funds, equivalent to roughly 59,000 BTC. TechFlow described the total as nearly $4.4 billion, more than double the previous record set in February 2025. During the same three-week period, the combined assets of the ETFs fell from about $104.3 billion to around $82.8 billion as redemptions coincided with a drop in Bitcoin’s price.
Thirteen Trading Days of Outflows
Fund flows have become a direct way to measure institutional exposure to Bitcoin because spot ETFs buy and sell the underlying asset in response to investor creations and redemptions. When money enters or leaves these products, it corresponds to additions or reductions in institutional positions rather than public statements of intent.
Galaxy Research data showed that the 13-day outflow streak from May 15 to June 3 was the longest since this group of U.S. spot Bitcoin ETFs began trading in January 2024. The previous record was eight days and $3.2 billion in February 2025. Galaxy Research also noted that outflow totals over seven-day, 10-day and 20-day windows all reached record highs during this stretch, indicating that the selling pressure was sustained over an extended period rather than concentrated in a single session.
The withdrawals pushed 2026 year-to-date cumulative net flows into negative territory for the first time. Bloomberg ETF analyst Eric Balchunas confirmed that annual flows had turned negative for the first time this year. Among individual products, BlackRock’s IBIT experienced the heaviest withdrawals. Farside Investors data showed that IBIT alone saw about $3.3 billion in outflows during the period, roughly three quarters of the total. Fidelity’s FBTC followed with about $456.6 million in outflows, while Grayscale’s GBTC saw about $303.6 million leave. IBIT had been the strongest asset gatherer since launch, but in this cycle it became the center of redemptions.
Assets Fell by About $21.5 Billion in Three Weeks
The impact of the outflows was amplified by Bitcoin’s concurrent price decline. Citing SoSoValue data, The Defiant reported that total assets across all U.S. spot Bitcoin ETFs declined from about $104.29 billion on May 15 to about $82.83 billion on June 3, a reduction of about $21.5 billion in three weeks. The decline reflected both redemptions and the mark-to-market effect of Bitcoin falling from above $80,000 to near $63,000, a drop of about 21%.
In terms of holdings, the ETFs’ Bitcoin balance fell to about 1.277 million BTC, around 7.2% below the peak reached in October 2025. The Bitcoin held by these ETFs currently represents about 6.36% of Bitcoin’s circulating market capitalization, down from more than 7% at the mid-May high. A particularly large redemption occurred on May 28, when BlackRock’s IBIT recorded $527.8 million in net outflows in a single day, the second-largest daily redemption in the fund’s history. For May as a whole, U.S. Bitcoin ETFs posted $2.43 billion in monthly net outflows, the largest monthly outflow on record, with $1.42 billion occurring in the final week.
A Clean Reversal Day on June 12
The first shift came in early June. On June 5, Bitcoin ETFs ended the 13-day outflow streak with a modest $3.05 million in net inflows. The amount was small relative to the size of the market, but the direction changed. On the same day, Ethereum ETFs also ended 17 consecutive days of outflows, recording $19.3 million in net inflows, all from BlackRock’s ETHA fund.
The data point that institutions treated as a clearer signal came on Friday, June 12. According to SoSoValue, U.S. spot Bitcoin ETFs recorded $85.84 million in single-day net inflows. Five funds attracted capital, while the other seven reported zero net flow. None of the 12 products recorded net outflows. This “no outflow across all funds” setup was the condition bullish observers used to assess whether selling pressure had eased.
Standard Chartered Adds the Flow Signal to Its Bottom Checklist
Geoff Kendrick, global head of digital assets research at Standard Chartered, included the ETF flow data in his Bitcoin bottom checklist. In a brief note to clients on Friday, Kendrick said crypto asset prices had already seen the low for this cycle, corresponding to Bitcoin at about $59,000, down 53% from a $126,000 high. He said three indicators were needed for confirmation: Strategy reported that it bought more Bitcoin last week, ETFs recorded positive flows on Friday, and oil prices continued to move lower. He closed the report with the line: “Winter is over, welcome back to crypto spring.”
A single day of $85.84 million in inflows does not reverse the roughly $4.4 billion that left over three weeks. Still, one trading day without net outflows across any product serves as the starting point for judging whether selling pressure has peaked. Cryptopolitan cited calculations showing that ETF flows currently explain about 45% of Bitcoin’s weekly price movement. Since their January 2024 launch, this group of Bitcoin ETFs has still accumulated more than $55 billion in net inflows and remains less than $10 billion away from its historical peak. Balchunas therefore described the $4.4 billion outflow episode as a meaningful momentum reversal rather than a structural collapse.