U.S. spot Bitcoin ETFs returned to net inflows on Sept. 17, receiving approximately $159.45 million after a one-day hiatus. BlackRock's IBIT led the inflows with $183.66 million, while Fidelity's FBTC and VanEck's HODL recorded outflows of $16.64 million and $7.57 million, respectively. U.S. spot Ethereum ETFs moved in the opposite direction, posting approximately $39.24 million in net outflows for a third consecutive trading day. BlackRock's ETHA accounted for $42.86 million of the Ethereum withdrawals, while Fidelity's FETH and VanEck's ETHV attracted $1.83 million and $1.79 million, respectively. ETF flows are closely watched as an indicator of institutional and professional demand for crypto assets. Bitcoin rose about 1.5% over 24 hours to around $77,500 amid improving risk sentiment.