US spot Bitcoin and Ether exchange-traded funds posted their strongest combined weekly inflows since April, drawing approximately $1.1 billion as institutional demand reaccelerated. Bitcoin ETFs alone recorded about $853.5 million in net inflows over five consecutive trading sessions ending August 7, reversing the prior week’s outflows and ranking as the category’s best performance since the week that closed April 17.

Ether ETFs contributed $244.9 million during the same period, also their largest weekly total since mid-April. The dual rebound occurred even as overall trading volume in the products remained near multi-year lows, with Bitcoin ETF turnover declining roughly 9 percent to about $8.19 billion for the week.

Bitcoin Funds Lead with Five Straight Inflow Days

Spot Bitcoin ETFs opened the week with $170.1 million in net inflows on August 3, followed by $211.5 million on August 4. The strongest single day arrived on August 5 with $244.4 million, after which flows moderated to approximately $128.8 million on August 6 and $98.85 million on August 7. The five-day total of roughly $853.5 million represented a swing of more than $900 million from the previous week’s net outflows of about $61.5 million.

BlackRock’s IBIT dominated the activity, accounting for approximately $693 million, or more than 80 percent of the Bitcoin category’s weekly inflows. Fidelity’s FBTC added roughly $116 million. Other funds saw smaller gains or modest redemptions that were more than offset by the two largest products. By the end of the period, total net assets in spot Bitcoin ETFs stood near $79.5 billion, equal to about 6.1 percent of Bitcoin’s market capitalization, with cumulative net inflows since launch exceeding $52 billion.

August’s early pace already far outstripped July’s full-month total of about $172.4 million. The products generated roughly $1.57 billion in daily trading value toward the end of the week.

Ether ETFs Extend Positive Run

Spot Ether funds also posted consecutive inflows, beginning with a small outflow before adding $53.75 million, $60.86 million, $92.15 million and $49.60 million across subsequent sessions. BlackRock’s ETHA drove much of the demand. Total net assets in the Ether products reached approximately $10.74 billion, representing about 4.65 percent of Ether’s market capitalization. The week marked the longest positive streak for the category in 2026 so far.

Altcoin Products Show Mixed Results

Smaller crypto ETF categories saw far more limited demand. Hyperliquid (HYPE) spot ETFs returned to net inflows with $2.84 million after three weeks of outflows that totaled more than $30 million. Solana ETFs drew only about $145,000, while XRP funds finished roughly flat to slightly negative after mixed daily results. The concentration of capital into Bitcoin and Ether products stood in contrast to the cooler reception for most altcoin wrappers.

Security Incident and Market Context

The inflow surge coincided with heightened attention on self-custody risks following a security incident involving Coldcard hardware wallets. Attackers exploited a vulnerability in how certain devices generated wallet keys, resulting in the theft of roughly $116 million worth of Bitcoin from affected wallets created with vulnerable firmware.

Bloomberg ETF analyst Eric Balchunas noted that several major Bitcoin funds recorded inflows every day after the incident became public. He suggested the event could ultimately strengthen the appeal of regulated ETFs for investors uncomfortable with the technical and security demands of self-custody, while cautioning that correlation does not prove causation.

Bitcoin traded near $65,000 during the period, with limited immediate price reaction to the inflows. Some market participants pointed to continued institutional accumulation through ETFs even as broader trading volumes stayed subdued and other market developments, including stalled protocol discussions, remained in focus. One analysis of on-chain data also indicated that Bitcoin network wallets reached a yearly high alongside the growing ETF demand.

The week’s results reverse a stretch of uneven and often negative flows that had characterized much of the summer. Whether the rebound marks a sustained shift in institutional allocation or a temporary recovery will depend on continued daily and weekly flow data in the sessions ahead.