US spot Bitcoin exchange-traded funds (ETFs) recorded $462.7 million in net outflows last week, reversing three consecutive weeks of inflows, while Ether ETFs posted nearly $197 million in net inflows during the same period.
According to Farside Investors data, Bitcoin ETF outflows were recorded across all four trading sessions from Tuesday through Friday. The reversal came after Bitcoin funds had registered their strongest three-week inflow streak of 2026.
The selling intensified on Thursday, when US spot Bitcoin ETFs recorded $282.7 million in net outflows, marking their largest single-day withdrawal since July. Outflows slowed to $13.2 million on Friday but extended the negative streak to four consecutive trading days.
ARK 21Shares Bitcoin ETF recorded the largest weekly outflow at $234.2 million, followed by Grayscale’s Bitcoin Trust ETF with $129.1 million. BlackRock’s iShares Bitcoin Trust ETF posted $52.5 million in outflows, while Fidelity’s Wise Origin Bitcoin Fund recorded $50.7 million in withdrawals.
Despite the weekly decline, US spot Bitcoin ETFs remained in positive territory for September, with approximately $307.3 million in net inflows through Friday.
US spot Ether ETFs recorded $196.9 million in net inflows over the same four-day period, moving in the opposite direction to Bitcoin funds.
Ether ETFs experienced mixed flows during the week, recording $24.3 million in outflows on Tuesday, followed by $34.7 million in inflows on Wednesday and $29.9 million in outflows on Thursday.
The funds turned strongly positive on Friday, attracting $216.4 million in net inflows. BlackRock’s iShares Ethereum Trust ETF led the day with $148.8 million, while the 21Shares Core Ethereum ETF recorded $29.1 million in inflows.
The contrasting flows indicate a shift in investor demand between Bitcoin and Ether investment products, with Ether ETFs attracting stronger buying interest as Bitcoin funds experienced a weekly reversal.
