
U.S. spot bitcoin ETFs experienced their worst month ever in June, with $4.5 billion in net outflows, surpassing the previous record of $3.48 billion in February 2025. BlackRock's IBIT, the largest bitcoin ETF by assets, accounted for $3.55 billion of these outflows, including $212 million on June 30 alone. Total assets under management in these ETFs dropped from about $83 billion at the start of June to roughly $71 billion by month-end. The outflow trend may have been influenced by two key events: the highly successful debut of SpaceX's stock on June 12, which attracted massive retail investment, and the Federal Reserve's June meeting under new chair Kevin Warsh, which signaled a shift toward interest rate hikes and removed expectations for rate cuts, prompting institutions to reduce exposure to volatile assets like bitcoin ETFs.