U.S. Spot Bitcoin and Ether ETFs Pull In $2.62B Over Five Days as BTC Breaks Above $76,000

U.S.-listed spot Bitcoin and Ether ETFs attracted a combined $2.615 billion over the five trading sessions ending Aug. 21, their strongest weekly intake since October 2025, according to SoSoValue. Bitcoin ETFs brought in about $1.917 billion for the week, while spot Ether ETFs added roughly $697.5 million. The gains reversed the prior week's outflows and marked the biggest five-day haul in months. BlackRock led the final session on Aug. 21. Its iShares Bitcoin Trust (IBIT) absorbed $239 million and its iShares Ethereum Trust (ETHA) took in $151 million, accounting for about 79% of the day's combined $492 million inflow across both categories. Fidelity's Wise Origin Bitcoin Fund (FBTC) was the second-largest Bitcoin gainer on Friday with $30.19 million. After Friday's allocations, IBIT's cumulative net inflows reached $62.43 billion and FBTC's stood at $10.18 billion. Total net assets held by all U.S. spot Bitcoin ETFs rose to about $96.07 billion, roughly 6.17% of Bitcoin's market value. ETHA has attracted $12.17 billion since launch. Spot Ether ETFs held $14.30 billion in net assets at the end of the Aug. 21 session, about 4.85% of Ether's market value, while cumulative net inflows for the Ether ETF category were roughly $12.15 billion. Grayscale's Ethereum Mini Trust ETF added $11.51 million on Friday, lifting cumulative inflows to $1.85 billion. Daily flows over the five sessions were as follows: - Bitcoin ETFs: Aug. 17 $297.56M; Aug. 18 $189.30M; Aug. 19 $517.19M; Aug. 20 $606.29M; Aug. 21 $307M (total ≈ $1.917B) - Ether ETFs: Aug. 17 $30.85M; Aug. 18 $71.47M; Aug. 19 $189.15M; Aug. 20 $221M; Aug. 21 $185M (total ≈ $697.47M) Price action accelerated alongside the ETF inflows. Bitcoin broke out of a six-week range, rising roughly 18% in two days and topping $76,000 on Aug. 21 after pushing through resistance near $65,000, $70,000 and $75,000. CoinGlass data cited in the report showed nearly $3 billion in crypto positions were liquidated as Bitcoin crossed $70,000, with shorts taking most of the losses, pointing to forced short-covering and derivatives-driven buying. Ether also surged, climbing above $2,400 after an about-18% move in 24 hours. Ether ETFs recorded their biggest single-day intake since October 2025 on Aug. 20, when they drew $221 million. The latest inflows marked a sharp turnaround from the week ended Aug. 14, when combined crypto ETF flows were negative by roughly $392 million, implying a swing of about $3.01 billion between the two five-day periods. Analysts offered mixed views ahead of the late-week surge: Nansen's Nicolai Søndergaard cited forced short-covering, institutional demand and improving liquidity, while LVRG's Nick Ruck cautioned that one strong day would not establish a structural allocation trend and that sustained inflows would need confirmation. Five straight positive sessions have added evidence but not yet certainty of a durable shift. By the close of trading on Aug. 21, combined net assets across U.S. spot Bitcoin and Ether ETFs totaled about $110.36 billion, comprising $96.07 billion in Bitcoin products and $14.30 billion in Ether products, SoSoValue data show. Institutional and ETF demand helped amplify a rapid rally in both coins, with BlackRock's offerings capturing the bulk of fresh capital. Whether inflows persist likely hinges on price stability and broader catalysts for allocation.