TLDR
- U.S. spot Bitcoin and Ether ETFs combined for $2.61 billion in inflows over five trading sessions
- Bitcoin ETFs led with $1.92 billion, about 73% of total combined inflows
- Ether ETFs added $697 million after posting gains in all five sessions
- BlackRock dominated both categories, capturing around 79% of Friday’s combined flows
- Bitcoin broke above $76,000 during the week, gaining roughly 18% in two days
U.S. spot Bitcoin and Ether ETFs recorded their strongest combined week since October 2025, pulling in $2.61 billion across five trading sessions ending August 21.
The week reversed the previous period’s combined $391.96 million outflow, a swing of about $3 billion.
Bitcoin ETFs Lead the Charge
Bitcoin funds collected $1.92 billion for the week, with inflows building each day. The run began with $297 million on August 17, climbed to $517 million on August 19, and peaked at $606 million on August 20 before easing to $307 million on the final day.
ETFs bought $1,920,000,000 in $BTC this week.
Biggest weekly inflow since October 2025. pic.twitter.com/c8rbuSmsRF
— Ted (@TedPillows) August 22, 2026
BlackRock’s iShares Bitcoin Trust was the top performer each session. On August 21 alone, it took in $239 million, nearly 78% of that day’s total.
Cumulative net inflows into the iShares Bitcoin Trust have now reached $62.43 billion since launch. Fidelity’s fund followed with $30 million on the same day, bringing its total to $10.18 billion.
All U.S. spot Bitcoin ETFs now hold $96.07 billion in net assets, equal to 6.17% of Bitcoin’s total market value.
The $1.92 billion weekly total is the largest since October 2025, when funds attracted $2.71 billion in one week and $3.24 billion in another.
Ether ETFs Post Strong Gains Too
Ether ETFs added $697 million across the same five sessions, their best week in months. Daily inflows rose from $30 million on August 17 to $221 million on August 20, then finished at $185 million on August 21.
🚨BULLISH: Ethereum crosses $2,500 for the first time since March after surging 30% in five days.$ETH is up another 9% today.
It spent most of August stuck below $2,000.
The Aug 19 move was a 20% single-day surge, its largest since May 2025.
Spot ETH ETFs pulled in over $500… pic.twitter.com/Jh5sI21vTQ
— Coin Bureau (@coinbureau) August 21, 2026
BlackRock’s iShares Ethereum Trust led Friday’s session with $151 million. Grayscale’s Ethereum Mini Trust followed with $11.5 million.
Total net assets in Ether ETFs reached $14.30 billion by end of session, equal to 4.85% of Ethereum’s market value.
The weekly total topped the entire month of July, when Ether ETFs collected $365 million.
Bitcoin’s price climbed roughly 18% in two days, breaking through $65,000, $70,000, and $75,000 before clearing $76,000 on August 21. Ether also gained about 18% in a single 24-hour stretch, rising above $2,400.
LVRG Research Director Nick Ruck noted that sustained inflows would require more confirmation before pointing to a lasting trend.
Some traders are now rotating into altcoins. Bitcoin Cash gained 31% on August 21, while Ethena rose 27%. Bitcoin dominance held near 59.8%, and the Altcoin Season Index sat at 33 out of 100.
BlackRock captured $390 million combined across both ETFs on Friday, roughly 79% of the day’s total inflows across both categories.
