According to the source, US spot BTC ETFs recorded $1.23 billion in weekly net outflows and US spot ETH ETFs saw $311.8 million in net outflows. These reported outflows indicate net redemptions that typically require authorized participants to sell underlying BTC and ETH to meet cash needs, increasing realized sell pressure, per ETF creation and redemption mechanics disclosed by ETF issuers and the SEC. For traders, sustained weekly outflows reduce marginal buy-side demand from the ETF channel and can tighten on-exchange liquidity during US hours, per standard ETF flow accounting and primary market mechanics disclosed by ETF issuers and the SEC.