According to Fixygen, U.S. spot Bitcoin exchange-traded funds (ETFs) saw $986.9 million in net inflows for the week ending September 4, extending their streak of positive weeks to three in a row.
According to SoSoValue data cited by The Block, inflows increased compared to $924.5 million the previous week. BlackRock’s iShares Bitcoin Trust (IBIT) led the way, attracting $691.5 million over the week.
Meanwhile, on September 3, net inflows into all U.S. Bitcoin ETFs reached $730.9 million, marking the highest daily figure since mid-January. The following day, the funds received an additional $174.6 million.
Bitcoin ETF trading volume for the week totaled $14.5 billion, compared to nearly $19 billion the week before. Meanwhile, U.S. spot Ethereum ETFs attracted $218.4 million, also marking their third consecutive week of positive inflows. Their trading volume totaled $4.1 billion.
Overall, August was one of the strongest months for institutional crypto products in the past year. Net inflows into Bitcoin ETFs reached $3.52 billion—the highest since September 2025—while Ethereum ETFs received $1.85 billion, marking their best monthly performance since August of last year.
The shift in sentiment was even more pronounced in the third week of August, when Bitcoin ETFs attracted $1.9 billion, Ethereum ETFs—$697.2 million, and the combined turnover of both categories more than tripled—to $29 billion.
However, inflows remain uneven. Following a strong previous week, approximately $46.6 million was withdrawn from Bitcoin ETFs on September 8. Thus, institutional demand has resumed, but investors remain sensitive to macroeconomic data and expectations regarding U.S. interest rates.
Bitcoin itself corrected after rising above $81,000. According to CoinGecko, on September 9, it was trading at around $78,300, and the cryptocurrency’s market capitalization stood at approximately $1.58 trillion.
Spot Bitcoin ETFs allow investors to gain exchange-traded exposure to Bitcoin without having to store the cryptocurrency themselves. The largest players in the U.S. market are BlackRock, Fidelity, Grayscale, ARK/21Shares, and Bitwise.
Data source — SoSoValue/The Block: Bitcoin ETF flow data
