US spot Bitcoin and Ether ETFs just had the kind of week that makes fund managers sleep soundly. Combined net inflows hit $2.6 billion for the week ending August 21, marking the strongest weekly performance for both product categories since October 2025.
Trading volume across the funds surpassed $29 billion, more than tripling from the prior week. The previous week saw roughly $392 million in net outflows, representing a swing of approximately $3 billion in a single week.
Bitcoin leads, Ether follows
Bitcoin ETFs did the heavy lifting, pulling in nearly $1.9 billion and accounting for about 73% of the total haul. Bitcoin fund trading volume alone reached approximately $22.1 billion, an increase of more than 219% week over week.
Net assets under management for Bitcoin ETFs climbed to $96.1 billion, a 25.4% jump driven by both fresh capital and underlying price appreciation. Since their launch in early 2024, cumulative net inflows for Bitcoin ETFs have now reached roughly $53.7 billion.
