Bitcoin ETFs Surge $2.6 Billion in Net Inflows Amid Treasury Buyback Plans

US spot Bitcoin and Ethereum ETFs attracted $2.6 billion in net inflows for the week ending August 21, according to Sosovalue data.

This was the largest weekly total since October 2025, reversing a prior week's outflow of $392 million.

The influx built steadily through the week: $297.6 million on Monday, August 17; $189.3 million on Tuesday; $517.2 million on Wednesday, the highest single day so far this month; and $606.3 million on Thursday, August 20.

BlackRock's IBIT alone accounted for approximately 83% of Thursday's total inflow.