BlockBeats news: On May 19, the U.S. spot Bitcoin ETF recorded a net outflow of approximately $648.6 million on Monday, marking the largest single-day capital outflow since January 29, 2026, and continuing the trend of about $1 billion in net outflows from last week.

Among these, the BlackRock iShares Bitcoin Trust (IBIT) led the way with a single-day outflow of around $448.3 million, followed by the ARK 21Shares Bitcoin ETF (ARKB) and the Fidelity Wise Origin Bitcoin Fund (FBTC). Products from Bitwise, VanEck, Invesco, and Franklin Templeton also experienced capital outflows.

Analysts believe recent geopolitical tensions between the U.S. and Iran, rising oil prices, and the increase in long-term U.S. Treasury yields have heightened market concerns about persistent inflation, prompting some institutional funds to temporarily shift towards safe havens and profit-taking. Meanwhile, the rising risk-free yield on U.S. Treasuries has also diminished the appeal of Bitcoin ETFs to institutional capital.

Despite the ramped-up short-term market volatility, some analysts still believe that Bitcoin's overall structural trend remains intact. The ongoing growth of stablecoin market cap also indicates that institutional money is still waiting for potential dip buying opportunities.