U.S. Spot Bitcoin ETFs See Record $2.39 Billion Weekly Inflow

U.S. spot Bitcoin ETFs recorded a weekly net inflow of $2.39 billion, the highest for 2026, though daily inflows trended downward throughout the week. According to SoSoValue, inflows peaked at $998.95 million on September 21 before declining to $134.47 million by Friday. Market activity was influenced by a 6.7% Bitcoin price surge on September 21 and subsequent macroeconomic shifts, including a rise in the 10-year Treasury yield above 5%. Despite the slowing ETF momentum, on-chain data from CryptoQuant shows $2.52 billion in net BTC outflows from major exchanges between September 22 and 24, suggesting continued accumulation by long-term holders and whales.