US-listed spot bitcoin exchange-traded funds (ETFs) have capped their best month of 2026, along with bitcoin’s biggest monthly gain since November 2024.
Bitcoin ETFs attracted $3.52 billion in net inflows in August, their highest monthly total since 2026 and a sharp increase from just $172 million inflows in July. According to In SoSoValue data.
Bitcoin (BTC) gained nearly 25% in August, its strongest monthly performance since a 37.29% rally in November 2024. According to From CoinGlass
August’s momentum quickly gave way to a weak start in September, as ETF flows turned negative and Bitcoin briefly fell below $77,000.
August cut year-to-date outflows by 66% to $1.77B
August’s $3.52 billion bitcoin ETF inflow reduced net outflows by nearly 66% year over year, from $5.29 billion to $1.77 billion.
According to SoSoValue data, the largest monthly outflow was $4.51 billion in June, followed by $2.43 billion in May and $1.61 billion in January.
Monthly Flows in US Spot Bitcoin ETFs in 2026 Source: SoSoValue
Funds recorded net inflows on 16 of the 21 trading days in August, including nine consecutive sessions from August 17 to August 27.
Total net assets stood at $99.61 billion at the end of August, up nearly 31% from $76.29 billion at the end of July. Monthly trading volume rose nearly 49% to $58.63 billion from $39.37 billion.
September begins with $236M in Bitcoin ETF outflows
US spot bitcoin ETFs opened September with net outflows of $236.46 million, reversing the $216.70 million net inflows recorded on Monday. The withdrawal marked the biggest daily outflow since July 31, when the fund lost $265.37 million.
The move comes after Bitcoin briefly dipped below $77,000 on Tuesday after trading above $80,000 in late August. According to That’s CoinGecko.
Related: Kaushal has bought $370M in bitcoin since June in its first corporate purchase
Ether and XRP ETFs remained in positive territory on Tuesday. Spot Ether (ETH) ETFs attracted to About $11 million on Tuesday, while the spot XRP (XRP) ETF to draw $14.4 million.
Ether pushed the ETF into positive territory for August 2026, with net inflows of $732 million for the year to July ending at about $1.12 billion.
XRP ETFs reached $502 million in net inflows for the year, up nearly 46% from $343 million at the end of July.
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