Spot Bitcoin ETFs post strongest weekly inflow in 10 months as price tests $80K

US spot Bitcoin ETFs just had their best week since October 2025, pulling in roughly $1.92 billion in net inflows over five trading days ending August 22. The capital surge arrived alongside a Bitcoin price rally of between 18% and 25% during the same stretch, with the asset testing levels near $80,000.

BlackRock dominated the flow

The daily breakdown tells a clear story about who’s winning the ETF race. Over the five trading days from August 17 through 21, total net inflows across all spot Bitcoin ETFs clocked in at $297.6 million, $189.3 million, $517.2 million, $606.3 million, and $307.5 million respectively.

BlackRock’s iShares Bitcoin Trust, ticker IBIT, was the gravitational center. On August 20 alone, IBIT attracted $503 million in inflows, representing 83% of that day’s total across all Bitcoin ETF products.

Fidelity’s FBTC, Bitwise’s BITB, and ARK 21Shares’ ARKB also contributed meaningful inflows throughout the week.

Trading volume across all spot Bitcoin ETFs surged more than 219% to reach $22.1 billion for the week.

The cumulative picture keeps growing

Since their launch in January 2024, US spot Bitcoin ETFs have now accumulated approximately $53.7 billion in cumulative net inflows. Total assets under management across the category rose to roughly $96.1 billion following the latest week’s inflows and the accompanying price appreciation.

The last time weekly inflows came close to this level was October 2025, when approximately $2.71 billion entered these funds during a period of heightened market optimism.

Spot Ether ETFs also had a notable week, attracting $697 million in inflows.