Bitcoin ETFs record best month of 2026 as BTC jumps 25% in August

US‑listed spot Bitcoin exchange‑traded funds (ETFs) posted their strongest month of 2026 in August, coinciding with Bitcoin’s biggest monthly rally since November 2024.

Record inflows for Bitcoin ETFs

According to SoSoValue data, Bitcoin ETFs attracted $3.52 billion in net inflows in August, the highest monthly total for the year. This compares with just $172 million in July.

The inflows cut year‑to‑date net outflows by roughly 66%, reducing the cumulative deficit from $5.29 billion to $1.77 billion.

Bitcoin’s price surge

Bitcoin (BTC) rose about 25 % in August, marking its strongest monthly performance since a 37.29 % rally in November 2024.

After the August rally, the price slipped below $77,000 in early September, ending a brief period of trading above $80,000.

ETF asset growth and trading volume

Total net assets of US spot Bitcoin ETFs grew to $99.61 billion at the end of August, up from $76.29 billion at the end of July – an increase of roughly 31 %.

Monthly trading volume rose nearly 49 % to $58.63 billion, up from $39.37 billion in July.

September’s early outflow

On the first trading day of September, Bitcoin ETFs recorded a net outflow of $236.46 million, reversing the $216.70 million inflow seen the previous day. The outflow was the largest daily withdrawal since July 31.

Altcoin ETF trends

Spot Ether (ETH) ETFs posted a modest $11 million inflow on the same Tuesday, while spot XRP ETFs attracted $14.4 million.

Ether ETFs moved into positive year‑to‑date territory in August, with $732 million in net inflows after ending July about $1.12 billion in the red.

XRP ETFs reached $502 million in year‑to‑date net inflows, up roughly 46 % from $343 million at the end of July.