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.
