Bitcoin and Ethereum ETFs Post Best Week Since April as Inflows Hit 3-Month High

$1 billion. That is what US spot Bitcoin ETFs pulled in during the week ending August 8, their strongest weekly haul since April 2026 and the third-best single week on record since October 2025.

Spot Ethereum ETFs extended their consecutive weekly inflow streak to five straight weeks. The back-to-back performance across both products signals that institutional appetite for regulated crypto exposure has returned with force after a quieter stretch earlier this summer.

The Bitcoin ETF figure stands out for its context as much as its size. April 2026 marked the previous high-water mark for weekly inflows, a period when institutional positioning was particularly aggressive. Matching that level now, with five months of distance, suggests the earlier surge was not a one-off. Three of the strongest weekly inflow totals since the October 2025 cycle have now occurred within this calendar year, a pattern that points to deepening structural demand rather than isolated tactical bets.

Ethereum ETFs tell a slightly different story. The products launched later than their Bitcoin counterparts, and early adoption was slower to materialize. Five consecutive weeks of net inflows represents the longest such streak the Ethereum ETF complex has posted, and it comes at a moment when institutional allocators appear more comfortable building diversified crypto exposure beyond Bitcoin alone. The consistency matters more than raw dollar weight at this stage. Weekly inflow data can be noisy; five weeks of uninterrupted positive numbers is a signal worth taking seriously.

A note of caution is warranted. Single-week inflow records and short streaks do not confirm a sustained trend. ETF flows can reflect tactical rebalancing, options hedging, or end-of-quarter positioning as much as genuine conviction about long-term crypto adoption. The April 2026 reference point is itself a reminder of cyclicality: inflows peaked, then pulled back. There is no guarantee the current momentum persists into September.

That said, the structural picture for US crypto ETFs has shifted considerably since the products first launched in January 2024. Assets under management have grown, the roster of institutional allocators has widened, and the products have survived multiple volatile market cycles without the kind of sustained outflows that might have spooked early adopters. A week like this one, sitting at a three-month high and third-best all-time, fits a market that has normalized rather than one in the middle of a speculative blowoff.

For traders watching capital rotation, the simultaneous strength in both Bitcoin and Ethereum ETFs is notable. Historically, ETH inflows have lagged BTC inflows by several weeks during risk-on cycles as allocators move from the benchmark asset toward higher-beta alternatives. Five straight weeks of Ethereum ETF inflows, running concurrently with a billion-dollar Bitcoin week, compresses that lag considerably. Whether that reflects a structural shift in how institutions build crypto portfolios or simply the maturation of the Ethereum ETF market is a question the next several weeks of flow data will help answer.