U.S.-listed spot Bitcoin and Ether ETFs pulled in a combined $2.615 billion over five trading sessions this week — the biggest weekly inflow for the pair since October 2025, according to SoSoValue. Key numbers - Combined inflows (Aug. 17–21): $2.615 billion - Bitcoin ETFs: ≈ $1.917 billion (about 73% of the total) - Ether ETFs: ≈ $697.5 million (about 27% of the total) - End-of-day net assets (Aug. 21): Bitcoin ETFs $96.07 billion; Ether ETFs $14.30 billion; combined AUM $110.36 billion. - Bitcoin ETFs represented roughly 6.17% of Bitcoin’s market value; Ether ETFs about 4.85% of Ethereum’s market value. Top fund flows and cumulative tallies - BlackRock’s iShares Bitcoin Trust (IBIT) received $239 million on Aug. 21 — nearly 78% of that day’s Bitcoin ETF intake — lifting IBIT’s cumulative net inflows to $62.43 billion. - Fidelity’s Wise Origin Bitcoin Fund (FBTC) added $30.19 million on Friday, bringing its cumulative total to $10.18 billion. - On the Ether side, BlackRock’s iShares Ethereum Trust (ETHA) led Friday with $151 million. ETHA has attracted $12.17 billion since launch. Grayscale’s Ethereum Mini Trust ETF added $11.51 million on Friday, taking its cumulative net inflows to $1.85 billion. - Across spot Ether ETFs, historical cumulative net inflows were reported at $12.15 billion. Daily flow cadence - Bitcoin ETFs: $297.56M (Aug. 17); $189.30M (Aug. 18); $517.19M (Aug. 19); $606.29M (Aug. 20); $307M (Aug. 21). - Ether ETFs: $30.85M (Aug. 17); $71.47M (Aug. 18); $189.15M (Aug. 19); $221M (Aug. 20 — largest daily intake since Oct. 2025); $185M (Aug. 21). Market drivers and context - The surge in ETF inflows coincided with a sharp price breakout for Bitcoin. Over a roughly two-day span Bitcoin rallied about 18%, climbing from the low-$60,000s through $65k, $70k and $75k to clear $76,000 on Aug. 21. - CoinGlass data cited around $3 billion of crypto position liquidations as Bitcoin crossed $70,000, with short positions accounting for most of the forced selling. The ETF inflows appear to have accompanied that short-covering and broader forced buying in derivatives markets. - Ether also jumped, rising above $2,400 after gaining roughly 18% in a single 24‑hour period — coinciding with the Aug. 20 $221 million ETF intake. Historical comparison - The $1.92 billion weekly intake into Bitcoin ETFs is more than twice the $853.5 million five-day total seen in the opening week of August and is above the $1.42 billion weekly inflow recorded in January. The largest recent weeks were Oct. 6–10, 2025 ($2.71B) and Sept. 29–Oct. 3, 2025 ($3.24B). - One week earlier (Aug. 10–14) Bitcoin ETFs saw $389.7 million of outflows, making this week’s result a roughly $2.31 billion improvement from the previous five-day period. What analysts say - Nansen senior research analyst Nicolai Søndergaard pointed to forced short covering, institutional demand and improved liquidity as contributors to the move. - LVRG Research Director Nick Ruck warned that a single strong ETF session was not enough to prove a lasting change in allocation behavior, saying sustained inflows would require additional confirmation. The five consecutive positive sessions this week provide more evidence, but the durability of the trend remains to be tested. Who dominated Friday - BlackRock led the final session across both categories, receiving about $390 million via IBIT and ETHA — roughly 79% of the $492 million total ETF inflow that day. Bottom line This week’s concentrated inflows underscore renewed institutional appetite for spot crypto ETFs and coincided with sharp price breakouts in both Bitcoin and Ether. Whether the inflows mark the start of a sustained allocation trend or a temporary reaction to price momentum and short covering will depend on upcoming sessions and broader market catalysts.
U.S. Spot BTC & ETH ETFs See $2.62B Weekly Inflow, Largest Since Oct 2025
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Summary
Bitcoin news reports that U.S.-listed spot Bitcoin and Ether ETFs saw a combined $2.615 billion in inflows from August 17 to 21, the largest weekly inflow since October 2025. Bitcoin ETFs led with $1.917 billion, while Ether ETFs added $697.5 million. BlackRock’s iShares Bitcoin Trust (IBIT) took in $239 million on August 21, making up 78% of the day’s Bitcoin ETF inflows. Bitcoin analysis shows the surge came as Bitcoin rose 18% in two days to $76,000. Analysts point to short-covering and institutional demand as main factors, though long-term inflow trends remain unconfirmed.
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