Bitcoin and Ether spot ETFs draw $2.6B weekly inflows, strongest since Oct. 2025

U.S.-listed spot Bitcoin and Ethereum exchange-traded funds (ETFs) posted combined net inflows of $2.615 billion for the week ended Aug. 21, flipping from the prior week's $392 million net outflow and marking the best weekly showing since October 2025, CoinDesk reported. Bitcoin spot ETFs accounted for most of the rebound. SoSoValue data shows U.S. spot Bitcoin ETFs took in $307 million on Aug. 21, extending their run to five straight trading days of net inflows. Over those five sessions, net inflows were $298 million, $189 million, $517 million, $606 million and $307 million, totaling about $1.917 billion—roughly 73% of the combined inflows into Bitcoin and Ethereum ETFs. As of Aug. 21, total net asset value across all U.S. spot Bitcoin ETFs stood at $96.07 billion, about 6.17% of Bitcoin's total market capitalization. BlackRock's IBIT had cumulative net inflows of $62.43 billion, while Fidelity's FBTC reached $10.18 billion. Ether spot ETFs also logged five consecutive days of inflows, adding $185 million on Aug. 21. The five-day sequence totaled roughly $697 million, with daily net inflows of $30.85 million, $71.47 million, $189 million, $221 million and $185 million. The category had posted a $2.26 million net outflow in the week ended Aug. 14. By Aug. 21, U.S. spot Ethereum ETFs had net assets of $14.3 billion, representing about 4.85% of Ethereum's market cap. BlackRock's ETHA has accumulated net inflows of $12.17 billion since launch. The renewed fund demand coincided with a sharp move higher in crypto prices. Bitcoin broke out of an roughly six-week range and, on Aug. 21, climbed above $76,000—up about 18% in two days—clearing resistance around $65,000, $70,000 and $75,000. Ethereum also pushed above $2,400, rising about 18% within 24 hours. On Aug. 20, Ether ETFs saw a single-day inflow of $221 million, the largest daily intake since October 2025. CoinGlass data indicated that as Bitcoin moved through $70,000, cumulative crypto-market liquidations neared $3 billion, with losses concentrated in short positions. The report linked the rally to two main drivers: derivatives short-covering and steady inflows into U.S. spot ETFs. BlackRock captured the bulk of new allocations. On Aug. 21, IBIT and ETHA together drew $390 million, about 79% of the day's $492 million total inflow into Bitcoin and Ethereum ETFs. IBIT took in $239 million, nearly three-quarters of the daily inflow into Bitcoin ETFs. ETHA accounted for 82% of the day's inflow into Ethereum ETFs. SoSoValue data shows that by the close on Aug. 21, the combined net asset value of U.S. spot Bitcoin and Ethereum ETFs totaled about $110.36 billion.