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Spot Bitcoin ETFs Record $3.52 Billion in August Inflows as Bitcoin Rises 25%

Strong August inflows reduced year-to-date net withdrawals from U.S. spot Bitcoin funds by 66% before flows reversed in early September.

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U.S. spot Bitcoin exchange-traded funds generated $3.52 billion in net inflows in August 2026, marking their highest monthly total of the year, according to data from SoSoValue. The figure represents a substantial increase from July's $172 million in inflows and coincided with a 25% price gain for Bitcoin, its strongest monthly gain since November 2024 based on CoinGlass figures.

The influx of capital reduced year-to-date net outflows from spot Bitcoin ETFs by approximately 66%, trimming the cumulative deficit from $5.29 billion to $1.77 billion. The funds recorded positive flows on 16 out of 21 trading days in August, including a nine-day streak between August 17 and August 27. Total net assets grew 31% to $99.61 billion, while monthly trading volume advanced nearly 49% to $58.63 billion.

The positive momentum softened at the start of September, as spot Bitcoin funds posted $236.46 million in net outflows on Tuesday following $216.70 million in inflows on Monday. Meanwhile, spot Ether and XRP ETFs maintained positive momentum, pulling in $11 million and $14.4 million respectively on Tuesday.

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