Bitcoin Spot ETFs See $463M Weekly Outflows as Ether ETFs Pull In $197M

US spot Bitcoin exchange-traded funds posted net outflows of $462.7 million last week, while spot Ether ETFs drew fresh money over the same period. Bitcoin ETF selling ran for four straight sessions from Sept. 8 to Sept. 11, snapping the sector's strongest three-week inflow streak of 2026. The heaviest redemptions hit on Thursday, when the products lost $282.7 million—their largest single-day outflow since July. Outflows eased to $13.2 million on Friday. ARK 21Shares Bitcoin ETF led weekly withdrawals with $234.2 million, followed by Grayscale's Bitcoin Trust ETF at $129.1 million. BlackRock's iShares Bitcoin Trust ETF saw $52.5 million leave, while Fidelity's Wise Origin Bitcoin Fund recorded $50.7 million in outflows. Even after last week's reversal, spot Bitcoin ETFs remain positive for September, with net inflows of about $307.3 million through Friday. The pullback comes as Bitcoin continues to trade below the closely watched $80,000 level. BTC was around $77,900 on Monday after failing to hold its recent rebound. US spot Ether ETFs moved the other way, posting net inflows of $196.9 million across the same four-day week. Flows were choppy earlier: $24.3 million in outflows Tuesday, $34.7 million in inflows Wednesday, and $29.9 million in outflows Thursday. Momentum shifted sharply on Friday, when Ether ETF products attracted $216.4 million. BlackRock's iShares Ethereum Trust ETF contributed $148.8 million of that total, and the 21Shares Core Ethereum ETF added $29.1 million. Markets now turn to another potential volatility trigger, with the Federal Reserve set to announce its next interest-rate decision on Sept. 16. Persistent inflation and expectations of tighter monetary policy have pressured risk assets and may be reinforcing the more cautious tone among Bitcoin ETF investors.