US-listed spot Bitcoin exchange-traded funds (ETFs) recorded their best month of 2026 in August, coinciding with Bitcoin’s strongest monthly gain since November 2024.
The funds attracted $3.52 billion in net inflows during the month, up sharply from $172 million in July, according to SoSoValue data. Bitcoin’s price rose about 25% in August, its largest monthly advance since a 37.29% rally in November 2024, per CoinGlass. Total net assets under management increased to $99.61 billion from $76.29 billion at the end of July, a gain of roughly 31%, while monthly trading volume climbed nearly 49% to $58.63 billion.
Year-to-date net outflows were reduced by 66% to $1.77 billion in August, down from $5.29 billion at the end of July. The largest monthly outflows this year occurred in June at $4.51 billion, followed by $2.43 billion in May and $1.61 billion in January.
August’s inflows were distributed across 16 of 21 trading days, including nine consecutive sessions from August 17 through August 27. The momentum reversed in early September, as ETF flows turned negative and Bitcoin briefly dipped below $77,000 on Tuesday. US spot Bitcoin ETFs posted $236.46 million in net outflows on Tuesday, the largest single-day withdrawal since July 31.
Other digital asset ETFs remained in positive territory. Spot Ether ETFs added roughly $11 million on Tuesday, while spot XRP ETFs attracted $14.4 million. Ether ETFs entered positive territory for 2026 in August, with $732 million in year-to-date net inflows after ending July $1.12 billion in the red. XRP ETFs reached $502 million in year-to-date inflows, up about 46% from $343 million at the end of July.
