U.S. spot bitcoin ETFs drew $1.92 billion in net inflows during the week of August 17 to August 21, while ether funds added $697.18 million. Solana, XRP and HYPE ETFs also finished the week in positive territory as institutional demand broadened across the market.
Key Takeaways
Bitcoin ETFs drew $1.92B from Aug. 17-21, led by Blackrock’s $1.33B IBIT haul.Ether added $697M as XRP, Solana, and HYPE gains showed institutional demand broadening.Bitcoin ETF AUM rose 25% to $96.07B, with price gains driving most of the weekly increase.The week opened with a rebound and ended with a rush.
Bitcoin exchange-traded funds (ETFs) attracted fresh capital in every session, building from a $297.56 million Monday inflow to a three-day burst that carried the category to its strongest weekly result in months. Ether followed the same path, while XRP and solana funds quietly built momentum all week.
Bitcoin Leads a Five-Day Buying RunBitcoin ETFs recorded $1.92 billion in net inflows for the week.
Blackrock’s IBIT dominated the weekly ledger with $1.33 billion in inflows. Fidelity’s FBTC added $293.1 million, while ARK 21Shares’ ARKB brought in $126.9 million.
August’s inflows now stand at $2.38 billion for bitcoin ETFs. Source: SosovalueBitwise’s BITB gained $87.3 million. Morgan Stanley’s MSBT added $28.9 million, Grayscale’s GBTC attracted $21.2 million, and the Bitcoin Mini Trust brought in $36.2 million. Vaneck’s HODL was the main exception, losing $16.1 million.
Bitcoin ETF trading volume reached $22.1 billion for the week, more than triple the prior week’s $6.9 billion. Assets under management rose to $96.07 billion, up 25%. Nearly $1 billion flowed into bitcoin ETFs over the final three sessions alone, the strongest three-day run since Bitcoin last traded above $80,000.
Ether ETFs also finished every session in positive territory, collecting $697 million for the week.
Combined bitcoin and ether ETF inflows reached $2.62 billion, the largest weekly total since October 2025.
XRP ETFs attracted $39.78 million, helped by strong Thursday and Friday inflows of $13.24 million and $18.38 million.
Solana funds added $28.34 million, with most of the demand arriving late in the week. HYPE ETFs finished with $3.89 million in net inflows. A $1.97 million Wednesday outflow was more than offset by Thursday’s $5.86 million addition.
Sosovalue highlighted the difference in flow intensity between the two largest crypto assets. Bitcoin’s $1.92 billion weekly inflow represented about 2.0% of its $96.07 billion in assets, while Ether’s $697 million inflow equaled roughly 4.9% of its $14.29 billion asset base.
By Friday’s close, the market had delivered one of its broadest institutional buying weeks of the year. Bitcoin remained the clear center of gravity, while ether and the larger altcoin funds shared in the surge.
