Why Did Crypto ETF Inflows Accelerate?
U.S. spot Bitcoin and Ether ETFs attracted a combined $1.1 billion last week, delivering the strongest weekly inflows for both categories since April as institutional demand improved despite relatively weak trading volumes.
Spot Bitcoin ETFs brought in about $853.5 million over five consecutive positive sessions, their largest weekly total since the week ending April 17, when inflows reached $996.4 million. Spot Ether ETFs added another $244.9 million, also recording their best week since April.
Bitcoin fund demand was strongest early and midweek. Wednesday produced $244.4 million in net inflows, followed by Tuesday at $211.5 million. Thursday added $128.7 million and Friday brought in another $98.9 million.
BlackRock’s IBIT dominated the Bitcoin flows, attracting $693.7 million, or more than 80% of the category’s weekly total. Fidelity’s FBTC added $116.4 million, accounting for another 13%. Together, the two largest Bitcoin funds by assets under management absorbed most of the new capital.
The concentration matters because it shows investors continue to favor the most established and liquid products when returning to crypto ETFs. Smaller funds may benefit from improving sentiment, but the latest inflow cycle remains heavily concentrated among market leaders.
Did The Coldcard Exploit Drive Bitcoin ETF Demand?
Bloomberg Intelligence senior ETF analyst Eric Balchunas linked the inflow streak partly to the Coldcard wallet exploit, noting that IBIT, FBTC and several other funds have recorded inflows each day since the vulnerability became public.
The exploit surfaced on July 30 and has resulted in at least $111 million in thefts, while estimated losses could exceed $130 million. The incident also triggered unusually heavy onchain activity, with about 890,000 BTC moving over seven days, a 2026 high.
A security incident affecting cold storage could make regulated ETFs more attractive to investors who want Bitcoin exposure without directly managing hardware wallets and private keys. That provides a plausible explanation for part of the Bitcoin inflow surge.
However, the same argument cannot fully explain the broader ETF rebound. Ether funds also delivered their strongest week since April, despite Ethereum holders having no exposure to a Bitcoin-specific hardware wallet vulnerability. Their latest inflow cycle also began several days after the Coldcard issue was disclosed.
That points to a wider improvement in institutional crypto demand rather than a simple migration from self-custody into Bitcoin ETFs.
Investor Takeaway
The Coldcard exploit may have encouraged some Bitcoin investors to prefer regulated custody, but simultaneous Ether inflows suggest the stronger ETF demand is broader than one security event. The more important test is whether inflows persist once that immediate concern fades.
Why Are Ether ETFs Gaining Momentum?
Spot Ether ETFs have now recorded five consecutive positive weeks, their longest winning streak of 2026. Thursday generated the strongest daily result last week with $92.2 million in net inflows, while Monday’s $11.4 million outflow was the only negative session.
The funds held $10.74 billion in net assets on Friday compared with $11.46 billion in cumulative net inflows. That leaves investors collectively about $711 million underwater on a mark-to-market basis, although the gap has narrowed considerably from roughly $2 billion in mid-June.
Large Ethereum holders have also been accumulating. Wallets holding between 10,000 and 100,000 ETH increased their combined balances to a record 19.6 million ETH from around 14 million ETH in mid-2025, according to blockchain data.
The combination of ETF inflows and whale accumulation may indicate that larger investors are rebuilding Ethereum exposure after a difficult first half of the year. Whether that continues will depend heavily on price performance and the persistence of institutional demand.
Why Are Low Trading Volumes Still A Warning?
The inflow rebound has not been matched by stronger ETF trading activity. Bitcoin ETF volume totaled about $8.19 billion last week, down 9% from $9.02 billion a week earlier and the second-lowest full trading week since October 2024.
Ether ETF volume fell even faster, declining about 21% to roughly $2.38 billion. That means fresh money is entering the products without a comparable rise in secondary-market activity.
The funds also remain negative for 2026 despite the latest recovery. Bitcoin ETFs have recorded approximately $4.44 billion in net outflows since the start of the year, while Ether ETFs remain down about $873 million.
Bitcoin gained roughly 3% during the week and traded near $65,100 over the weekend, while Ether changed hands around $1,920. Softer U.S. employment data on Friday also reduced expectations for a September rate hike, improving the macro backdrop for risk assets.
Still, most ETF buying occurred before that economic release, while Thursday and Friday produced the weakest Bitcoin inflows of the five-session streak. For investors, the next question is whether the latest demand represents the beginning of a sustained allocation cycle or simply a strong rebound after months of withdrawals.
