Key Takeaways
- • Bitcoin and Ethereum ETFs combined for $2.6 billion in inflows during the week ended August 21, 2026—their largest weekly haul since October 2025, with Bitcoin products capturing $1.92 billion and Ethereum funds adding $697.18 million.
- • Bitcoin ETFs recorded five consecutive days of net inflows from August 17–21, including a $606 million single-day inflow on August 20, while Ethereum funds reversed a $391.96 million outflow from the prior week.
- • Combined assets across both product categories grew approximately $23 billion last week, yet only $2.6 billion derived from new investor capital; the remaining $20.4 billion gain resulted from underlying asset appreciation of 22.9% for Bitcoin and 29.2% for Ethereum.
- • Trading volume in Bitcoin ETFs reached $22.15 billion for the week—roughly triple the prior week's activity—as Bitcoin traded near $77,125 and Ethereum near $2,423 at press time.
- • Despite the strong week, both products remain on track for their first losing year since launch: Bitcoin ETFs have shed $2.91 billion in 2026 year-to-date, while Ethereum products have lost $177.93 million.
Summary
US-listed Bitcoin and Ethereum ETFs posted their strongest weekly performance in ten months during the period ended August 21, 2026, attracting combined inflows of $2.6 billion. Bitcoin products led the recovery with $1.92 billion in new capital, while Ethereum funds added $697.18 million, reversing momentum from the previous week when the category experienced a combined $391.96 million outflow.
The momentum built consistently across multiple trading days. According to SoSoValue data, Bitcoin funds recorded five consecutive days of net inflows from August 17 through August 21, with August 20 delivering the strongest single-day performance at $606 million. Ethereum funds similarly peaked on August 20 with inflows of $220.77 million, marking their largest daily intake since October 2025. The uptick in capital flows coincided with substantially elevated trading activity, as weekly volume in Bitcoin ETF products climbed to $22.15 billion—approximately triple the prior week's total.
However, the headline inflow figures mask the true magnitude of asset growth in these products. Combined assets across both Bitcoin and Ethereum ETFs increased by roughly $23 billion during the week, yet only $2.6 billion of that expansion came from new investor capital. The remainder resulted from revaluation of underlying holdings, which appreciated 22.9% for Bitcoin and 29.2% for Ethereum over three sessions spanning August 19–21. At the time of reporting, Bitcoin traded near $77,125 and Ethereum near $2,423.
The week represents a tactical reversal in a longer-term decline. Bitcoin ETF cumulative net inflows peaked at $62.77 billion in October 2025 but have since contracted to $53.71 billion. Ethereum funds have declined even more sharply, with total assets remaining 53% below their August 2025 high. On a year-to-date basis, both product categories face headwinds: Bitcoin ETFs have posted $2.91 billion in net outflows during 2026, while Ethereum products have experienced $177.93 million in outflows, positioning both for their first losing calendar year since launch.
The momentum built consistently across multiple trading days. According to SoSoValue data, Bitcoin funds recorded five consecutive days of net inflows from August 17 through August 21, with August 20 delivering the strongest single-day performance at $606 million. Ethereum funds similarly peaked on August 20 with inflows of $220.77 million, marking their largest daily intake since October 2025. The uptick in capital flows coincided with substantially elevated trading activity, as weekly volume in Bitcoin ETF products climbed to $22.15 billion—approximately triple the prior week's total.
However, the headline inflow figures mask the true magnitude of asset growth in these products. Combined assets across both Bitcoin and Ethereum ETFs increased by roughly $23 billion during the week, yet only $2.6 billion of that expansion came from new investor capital. The remainder resulted from revaluation of underlying holdings, which appreciated 22.9% for Bitcoin and 29.2% for Ethereum over three sessions spanning August 19–21. At the time of reporting, Bitcoin traded near $77,125 and Ethereum near $2,423.
The week represents a tactical reversal in a longer-term decline. Bitcoin ETF cumulative net inflows peaked at $62.77 billion in October 2025 but have since contracted to $53.71 billion. Ethereum funds have declined even more sharply, with total assets remaining 53% below their August 2025 high. On a year-to-date basis, both product categories face headwinds: Bitcoin ETFs have posted $2.91 billion in net outflows during 2026, while Ethereum products have experienced $177.93 million in outflows, positioning both for their first losing calendar year since launch.
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