U.S. spot Bitcoin ETFs recorded $462.7 million in net outflows during the previous week, ending a three-week run of positive flows, while Ethereum ETFs attracted $196.9 million. Bitcoin fund withdrawals occurred across four consecutive trading days from Tuesday through Friday, led by $282.7 million in outflows on Thursday. ARK 21Shares Bitcoin ETF saw $234.2 million leave, followed by Grayscale’s Bitcoin Trust ETF with $129.1 million, BlackRock’s iShares Bitcoin Trust ETF with $52.5 million and Fidelity’s Wise Origin Bitcoin Fund with $50.7 million. Despite the reversal, Bitcoin ETFs retained approximately $307.3 million in cumulative net inflows for September. Ethereum products benefited from strong Friday demand, including $148.8 million for BlackRock’s iShares Ethereum Trust ETF and $29.1 million for the 21Shares Core Ethereum ETF. The ETH/BTC ratio has risen more than 25% in the third quarter, its strongest quarterly performance since Q3 2025, while Ethereum’s quarter-to-date return is nearing 60%, compared with a historical Q3 peak of more than 66% established the previous year. Ethereum’s share of total crypto market capitalization also increased more than 25% quarter over quarter, versus a 1.5% rise for Bitcoin’s dominance. Price action remains less conclusive: Bitcoin traded near $78,200 on Monday morning after moving between $76,370 and its 200-hour moving average around $78,151, while Ethereum rallied from $2,402 to $2,666 before retreating to about $2,510. Analysts say sustained Ethereum inflows alongside Bitcoin outflows across multiple sessions would be needed to confirm institutional capital rotation rather than routine rebalancing or profit-taking.