According to the source, U.S. spot Bitcoin ETFs reportedly saw net outflows of 4,083 BTC today while spot Ethereum ETFs recorded 81,358 ETH in net redemptions; traders should treat these figures as unverified until confirmed against issuer reports and DTCC daily share changes (source: issuer websites and DTCC). Creation/redemption mechanics mean persistent ETF outflows can prompt authorized participants to redeem shares and sell or withdraw underlying BTC and ETH, which may pressure spot liquidity during U.S. trading hours (source: SEC guidance on ETF creation/redemption and spot BTC/ETH ETF filings). Before taking positions, confirm same-day flow prints on fund pages, check NAV premium/discount and primary market share changes, and monitor custodian wallet movements tied to the funds to validate flow direction (source: BlackRock iBIT, Fidelity FBTC, VanEck HODL, Bitwise BITB, Grayscale GBTC issuer disclosures, DTCC, and fund custody disclosures).