U.S. spot Bitcoin ETFs recorded approximately $462.7 million in net outflows across the four trading sessions from September 8 through September 11, reversing part of the strong demand seen earlier in the month. The funds finished every session of the shortened trading week in negative territory, marking a clear deterioration in near-term Bitcoin ETF flows.
According to Farside Investors’ Bitcoin ETF data, the funds lost $46.6 million on September 8, $120.2 million on September 9, $282.7 million on September 10 and another $13.2 million on September 11. The September 10 session accounted for more than half of the week’s total withdrawals, making it the most significant redemption day of the four-session streak.
Bitcoin Flows Reverse After Strong Start to September
The withdrawals followed substantial allocations earlier in September, including $730.8 million of net inflows on September 3 and $174.6 million the following day. Despite the latest $462.7 million setback, Bitcoin ETFs remained approximately $307.3 million net positive for September through September 11, based on the daily figures reported by Farside.
The distribution of withdrawals also varied between issuers across the week, rather than reflecting a single fund consistently driving redemptions. On September 10, for example, ARK Invest and 21Shares’ ARKB lost $164.3 million, while Fidelity’s FBTC, BlackRock’s IBIT and Grayscale’s GBTC also recorded meaningful outflows. The pattern points to broader short-term de-risking across several Bitcoin products rather than an isolated fund-specific event.
Daily ETF flows can reflect portfolio rebalancing, arbitrage and tactical positioning alongside longer-term investment decisions. Four consecutive negative sessions provide a stronger signal than a single-day withdrawal, but they do not by themselves establish a structural institutional exit from Bitcoin.
Ether ETFs Move in the Opposite Direction
Ether ETFs diverged from Bitcoin over the same September 8–11 window. After losing $24.3 million on September 8, the category returned to positive territory during subsequent sessions and finished the four-day period with roughly $197 million in net inflows. The divergence shows that crypto ETF capital was being redistributed rather than uniformly withdrawn from digital asset products.
Smaller crypto ETF categories produced mixed results. Solana funds generated approximately $9.7 million in net inflows across the four sessions, while Hyperliquid products lost roughly $26.5 million. Those numbers were considerably smaller than Bitcoin and Ether flows, underscoring the different scale of capital operating across the emerging altcoin ETF market.
The week therefore produced a notable split in regulated crypto investment demand. Bitcoin suffered four consecutive sessions of withdrawals while Ether attracted substantial net capital, leaving subsequent ETF data to determine whether the divergence represents a temporary portfolio rotation or the beginning of a more persistent allocation shift.