$6.8 Billion Inflows Into U.S. Spot Crypto ETFs Drive Six-Week Rally in BTC and Altcoins
Over six weeks ending September 15, 2026, $6.8 billion flowed into U.S.-listed crypto exchange-traded funds (ETFs), with the iShares Bitcoin Trust ETF (IBIT) accounting for half of that total at $3.3–$3.4 billion. This influx has mechanically driven demand in spot markets as authorized participants must deliver actual Bitcoin to create new ETF shares, pushing BTC up 24% over a month and Ethereum and Solana higher still due to thinner floats and stronger retail participation. However, recent data shows signs of wobbling: IBIT fell nearly 5.2% week-over-week while Bitcoin dropped below $78,000 after holding it for two weeks. Year-to-date returns remain negative across the board—BTC is down over 10%, and IBIT has lost more than 13%. The ETF-driven buying appears insufficient to absorb profit-taking from earlier buyers. The surge in inflows was not tied directly to broader macroeconomic factors but rather a sustained institutional demand via ETFs. This dynamic suggests that while the rally is real, it may be vulnerable if net outflows begin and BlackRock’s custody desk becomes a seller instead of buyer.
Topics: Bitcoin ETFs Market Inflows Price Movement