U.S. Bitcoin ETFs post record $4.5B June outflows as IBIT leads

U.S. spot Bitcoin ETFs posted $4.5 billion in net outflows during June 2026, their worst month since launch in January 2024, according to The Block.

The June total topped the previous monthly record of $3.48 billion, set in February 2025, by 29%. BlackRock's iShares Bitcoin Trust (IBIT) led the decline, accounting for $3.55 billion of the monthly total.

What the June record shows

With Q2 closed, the June figure is a confirmed full-month record rather than a single-session break in flows. It marks a sharp cooling in institutional demand after the category drew heavy capital during its first two years.

Net assets across U.S. spot Bitcoin ETFs now stand at $70.9 billion, down from a peak above $110 billion. Cumulative net inflows since January 2024 remain positive at more than $51 billion, which keeps the drawdown in context. June was severe, but it did not erase the category's post-launch capital base.

The month-end streak

Outflows ran for nine consecutive days into month-end. On June 30 alone, investors pulled $222.6 million from the funds.

Analysts attributed the pressure to elevated interest rates, geopolitical uncertainty reducing institutional appetite for risk assets, SpaceX's $75 billion June IPO drawing capital toward equities, and a "simple lack of fresh capital" after heavy deployment into Bitcoin ETFs during 2025, as reported by The Block.

The analysts framed the pattern as speculative cooling rather than structural erosion in institutional conviction around the asset class. At $70.9 billion in net assets, U.S. spot Bitcoin ETFs still remain the largest ETF launch category in history.