US spot Bitcoin ETFs logged their longest withdrawal streak since launch in late May 2026. Across nine straight trading sessions, roughly $2.8 billion left the group, with some running counts taking the total close to $2.97 billion as the streak extended. The slide also made May the weakest month of 2026 for the category, with about $2.43 billion in net outflows.
BlackRock’s iShares Bitcoin Trust, IBIT, accounted for most of the damage. The fund saw about $2.04 billion exit over the nine-session run. On May 28 alone, IBIT posted $527.84 million in net outflows, just short of its record single-day withdrawal of $528.3 million set on January 30, 2026. That same day, the full set of 11 US spot Bitcoin ETFs lost $733.43 million, including $104.76 million from Grayscale’s GBTC and $60.30 million from Fidelity’s FBTC.
A $1.29 billion dark-pool block shifted the reading of the selloff
The most revealing trade came on May 26, when a $1.29 billion block of IBIT changed hands in a dark pool. The article said the trade represented exposure to roughly 13,000 to 15,000 Bitcoin. Because dark pools keep order size hidden from the public market until execution is complete, the sale did not hit visible order books in real time. During execution, Bitcoin held near $74,879, a sign that the market was not reacting to a visible rush for the exit.
That detail matters. A wave of small redemptions usually points to broad selling pressure across many holders. This streak looked different. The concentration in a few very large transactions suggests portfolio reallocation by major institutions, not a retail-driven flush.
Three pressures landed at the same time
The source ties the record outflow streak to three forces converging in late May. First was geopolitics. US airstrikes near the Strait of Hormuz and stalled US-Iran ceasefire talks pushed global markets into a risk-off move, while Brent crude climbed back above $93 a barrel. In that setting, institutions often cut exposure to higher-volatility assets first, and Bitcoin remained on that side of many books.
Second was competition from equities. In May 2026, the S&P 500 moved to fresh record highs above 7,568, driven by AI and semiconductor names. For multi-asset allocators, capital was drawn toward the strongest part of the stock market. Bitcoin ETFs, especially during a choppy price phase, lost out in that rotation.
Third was pressure from inside crypto. The article pointed to Strategy selling Bitcoin for the first time since 2022 in order to help fund a preferred-stock dividend. That sale carried symbolic weight because it came from the largest corporate Bitcoin buyer, while Bitcoin itself had slipped below cost basis for some holders.
Heavy outflows do not automatically mean structural demand broke
The historical comparison in the source is less dramatic than the headline numbers. It cites Glassnode’s 14-day moving average of ETF flows and says that measure has often bottomed near major turning points. The pattern appeared during the February 2026 correction, when Bitcoin briefly fell toward $60,000, and again in November 2025, when outflows accelerated as Bitcoin pulled back from its all-time high toward a local low near $85,000.
The article also puts the recent streak into a wider frame. The roughly $2.97 billion withdrawn during the run amounts to less than 8% of the $36 billion in net inflows the category attracted in its first full year. That still marks a sharp reversal in momentum and a real reset in sentiment. It does not, on the numbers presented, amount to a collapse in the ETF case.
What traders and allocators are watching now
If the outflows were driven mainly by tactical de-risking and cross-market rotation, the next turn would likely depend on those same drivers. The source highlights the Strait of Hormuz situation, oil prices, US jobs data, and comments from Federal Reserve officials because each could alter rate expectations and overall appetite for risk assets. It also points to the AI and semiconductor trade: if that rally cools, some capital may start reassessing Bitcoin ETF exposure.
On the flow side, the article says the key signal is not the raw count of red days but whether the 14-day ETF flow moving average stops falling and turns higher. In prior episodes, that shift mattered more than any single day of inflows.