US spot Bitcoin and Ether ETFs received approximately $452 million in combined net inflows on Sept. 23, comprising $347 million for Bitcoin funds and $105 million for Ether funds. BlackRock's IBIT and ETHA led their respective categories, while Fidelity's FBTC and FETH also posted substantial inflows. The Sept. 23 activity extended a four-day Bitcoin ETF inflow streak through Sept. 22 that brought in between $2.1 billion and $2.3 billion, reversing roughly $746 million of withdrawals on Sept. 15 and 16. Total assets in US spot Bitcoin ETFs reached about $111 billion during the period, with IBIT holding roughly $67.9 billion.