US-listed spot Bitcoin and Ethereum Exchange-Traded Funds (ETFs) collectively attracted more than $1 billion in fresh capital during the week ending August 7, 2026, marking their most significant inflow period since April. This substantial influx was predominantly driven by BlackRock’s iShares Bitcoin Trust (IBIT) and iShares Ethereum Trust (ETHA), which together absorbed over 80% of the total cash.
The impressive weekly performance signals a renewed appetite for regulated crypto investment products among investors, a notable rebound after a period of softer flows throughout much of the summer. Both Bitcoin and Ethereum ETFs haven’t seen such strong demand in nearly four months, indicating a potential shift in investor sentiment.
BlackRock’s commanding share of Ethereum ETF inflows
BlackRock’s iShares Ethereum Trust (ETHA) was a standout performer, collecting roughly $203 million during the week. This figure represents more than 80% of the entire Ethereum ETF category’s total inflows for the period. It underscores BlackRock’s significant influence in channeling institutional capital into the Ethereum ecosystem.
This strong showing also extends ETHA’s run of weekly inflows to five consecutive periods, a streak not seen since May to August 2025. Over this five-week period, Ethereum ETF products have brought in approximately $566 million. For context, they previously saw a 14-week run between May and August 2025 that attracted nearly $10 billion.
While Bitcoin ETFs experienced positive inflows from Monday through Friday, Ethereum ETFs initially faced a net outflow of $11.42 million on Monday, August 3. However, demand quickly reversed, with Tuesday bringing in $53.75 million, Wednesday seeing $60.86 million, and Thursday adding $92.15 million. Friday rounded out the week with an additional $49.60 million.
The concentration of inflows within BlackRock’s products, both Bitcoin and Ethereum, highlights its role as a preferred gateway for institutional entry into crypto markets. Their combined IBIT and ETHA offerings absorbed about $896 million of the nearly $1.1 billion that flowed into both asset classes this week.
This level of dominance suggests that for many large investors, the BlackRock brand offers a level of trust and accessibility that smaller players can’t yet match.
Bitcoin ETF demand rebounds strongly
Spot Bitcoin ETFs attracted $853.54 million during the week ending August 7, marking their biggest weekly haul in nearly four months. This performance exceeded the approximately $824 million collected during the week of April 24, making it the strongest since the week ending April 17, when Bitcoin funds garnered about $996 million.
The week saw consistent inflows into Bitcoin ETFs, starting with $170.09 million on Monday, August 3. This was followed by $211.49 million on Tuesday and $244.42 million on Wednesday, demonstrating robust demand early in the week. Inflows moderated slightly towards the end of the week, with approximately $128.8 million on Thursday and about $98.85 million on Friday.
BlackRock’s iShares Bitcoin Trust (IBIT) was a major contributor to this success, accounting for roughly $693 million of the weekly Bitcoin ETF total. That means the world’s largest asset manager captured more than four-fifths of the new money flowing into spot Bitcoin funds. IBIT’s contribution on August 7 alone was $86.71 million.
Since their US debut in January 2024, US spot Bitcoin ETFs have accumulated more than $52 billion in cumulative net inflows. These products now oversee about $80 billion in net assets. IBIT remains the largest by cumulative net inflows, having brought in $61.17 billion, far outpacing competitors like Fidelity’s FBTC, which has seen $10.04 billion in inflows.
Security concerns and institutional appeal
The renewed demand for regulated crypto ETFs arrived just days after disclosures of a significant security flaw affecting Coldcard hardware wallets. Attackers reportedly siphoned roughly 1,816 BTC, valued between $116 million and $130 million, from over 5,200 addresses beginning July 30. This incident brought the debate around self-custody versus institutional custody sharply back into focus.
Bloomberg Intelligence ETF analyst Eric Balchunas noted the timing of these fund flows following the Coldcard losses, though he stopped short of asserting a direct link. However, he suggested that such breaches could strengthen the case for institutional custody among investors primarily seeking long-term Bitcoin exposure. For these investors, using the asset for transactions or censorship-resistant payments isn’t the primary objective.
Balchunas emphasized that the robust security infrastructure of large financial institutions could become increasingly appealing, especially after a failure involving hardware designed specifically to keep Bitcoin outside traditional financial systems. While there