TL;DR:
U.S. spot Bitcoin exchange-traded funds ended their strongest three-week inflow streak of 2026 after recording $462.7 million in net outflows across the four trading days from September 8 through September 11. The reversal came as Bitcoin struggled below the psychologically important $80,000 level, trading near $77,900 on Monday after failing to sustain its recent recovery. The sharpest pressure arrived Thursday, when the funds lost $282.7 million in a single session, their largest daily outflow since July. The sudden reversal shows how quickly ETF demand weakened as Bitcoin’s price momentum stalled near a critical psychological threshold.
The weekly withdrawals were concentrated among the market’s largest funds. ARK 21Shares Bitcoin ETF recorded $234.2 million in net outflows, while Grayscale’s Bitcoin Trust ETF lost $129.1 million. BlackRock’s iShares Bitcoin Trust ETF posted $52.5 million in withdrawals, and Fidelity’s Wise Origin Bitcoin Fund saw $50.7 million leave. Despite the heavy weekly selling, Bitcoin ETFs remain positive for September, preserving a broader monthly inflow picture beneath the latest retreat. Through Friday, the category still held $307.3 million in net inflows for the month, showing that the weekly reversal has not yet erased September’s earlier demand.
Ethereum ETFs moved in the opposite direction, drawing $196.9 million in net inflows during the same four-day week. Early flows were uneven, with $24.3 million leaving Tuesday, $34.7 million arriving Wednesday and $29.9 million exiting Thursday. Friday changed the picture dramatically as Ether funds attracted $216.4 million in a single session. The contrast between Bitcoin outflows and Ethereum inflows created one of the clearest divergences in institutional crypto demand during the turbulent week. BlackRock’s iShares Ethereum Trust ETF accounted for $148.8 million of Friday’s total, while the 21Shares Core Ethereum ETF added another $29.1 million.
The divergence comes before a major macroeconomic test. The Federal Reserve is scheduled to announce its rate decision on September 16, as inflation and tighter-policy expectations weigh on risk assets. Bitcoin ETF investors are entering that decision with more caution, while Ethereum funds delivered their strongest session of the week. Whether that split persists may depend on how markets interpret the Fed’s next move and whether Bitcoin can regain ground above $80,000 after the recovery attempt failed. For now, flows show institutional positioning has become far more selective across the two largest crypto assets today.
