Bitcoin and Ethereum ETFs Surpass $1.2 Billion in Weekly Inflows
Spot ETFs for leading cryptocurrencies see massive capital influx in a single week.
1Record Weekly Inflows
Spot Bitcoin and Ethereum ETFs in the U.S. collectively attracted over $1.2 billion in capital during the week of August 31 to September 4, 2026. Bitcoin ETFs dominated with $986.85 million inflows, while Ethereum products gathered $218.41 million. This surge occurred despite a $236.46 million outflow from Bitcoin ETFs on September 1. The week's highlight was September 3, when Bitcoin ETFs alone saw $730.87 million inflows, offsetting earlier losses and driving the weekly total.
2Bitcoin ETF Breakdown
BlackRock's IBIT led Bitcoin ETF inflows with $691.51 million, followed by ARK Invest's ARKB at $137.74 million. Other notable performers included Fidelity's FBTC ($94.88M) and Grayscale's BTC ($88.62M). However, Grayscale's GBTC experienced $47.99 million outflows, and VanEck's HODL lost $33 million. Daily flows showed volatility: $216.7M (Aug 31), -$236.46M (Sep 1), $101.15M (Sep 2), $730.87M (Sep 3), and $174.6M (Sep 4). The September 3 surge alone accounted for 74% of Bitcoin's weekly total.
3Ethereum ETF Performance
Ethereum ETFs attracted $218.41 million despite a $48.08 million outflow on September 2. BlackRock's ETHA led with $136.44 million, followed by ETHB at $81.85 million. Daily flows were $87.68M (Aug 31), $10.95M (Sep 1), -$48.08M (Sep 2), $141.39M (Sep 3), and $26.46M (Sep 4). Grayscale's ETHE saw $36.97 million outflows, while other products like Fidelity's FETH ($4.73M) and Morgan Stanley's MSSE ($2.87M) contributed positively. The September 3 inflow of $141.39M compensated for earlier weakness.
4Altcoin ETF Activity
XRP ETFs led altcoin products with $18.96 million inflows, followed by HYPE ETFs ($12.27M) and SOL ETFs ($6.18M). Smaller inflows were seen in HBAR ($0.4M) and LTC ($0.12M) products, while DOGE ETFs had minor $0.34M outflows. BNB, LINK, AVAX, and DOT ETFs saw no capital movement. In Hong Kong, spot Bitcoin ETFs gained 9.78 BTC. This comes after Ethereum ETFs set a yearly record the prior week with $824.42 million inflows.
5Market Leaders
BlackRock emerged as the dominant player, capturing 70% of Bitcoin ETF inflows through IBIT ($691.51M) and 62% of Ethereum ETF inflows via ETHA ($136.44M). ARK Invest/21Shares' ARKB ranked second in Bitcoin products ($137.74M), while their ETHB took second in Ethereum ($81.85M). Traditional finance giants like Fidelity (FBTC: $94.88M, FETH: $4.73M) and Morgan Stanley (MSBT: $18.63M, MSSE: $2.87M) showed growing crypto market participation. Grayscale maintained significant but mixed results across products.
6Flow Volatility
The week demonstrated extreme volatility, with Bitcoin ETFs swinging from $216.7M inflows to $236.46M outflows within 24 hours (Aug 31-Sep 1), then rebounding to $730.87M (Sep 3). Ethereum products similarly fluctuated between $87.68M inflows and $48.08M outflows. This volatility reflects shifting investor sentiment and portfolio rebalancing. Notably, just two days (Sep 3-4) accounted for 77% of Bitcoin's weekly inflows and 77% of Ethereum's, showing concentrated buying interest mid-week.
7Comparative Performance
Bitcoin ETFs attracted 4.5x more capital than Ethereum products ($986.85M vs $218.41M), maintaining BTC's dominance. However, Ethereum's $218.41M followed its record $824.42M week, suggesting sustained interest. Altcoin ETFs collectively gathered just $37.81M (3% of total), highlighting investor preference for market leaders. The $1.2B total nearly matched Hong Kong's entire monthly Bitcoin ETF volume in just five days, underscoring the U.S. market's liquidity advantage.
8Market Implications
The $1.2B influx signals strong institutional confidence despite crypto's volatility. Bitcoin's near-$1B weekly inflow could support BTC prices, while Ethereum's continued interest follows its ETF approval momentum. BlackRock's dominance may accelerate consolidation among ETF providers. The mid-week surge suggests algorithmic traders may be timing large entries. With traditional finance increasingly participating through products like Morgan Stanley's MSBT ($18.63M), crypto markets are becoming more integrated with mainstream finance.
Original article: INCRYPTED — Bitcoin and Ethereum ETFs Surpass $1.2 Billion in Weekly Inflows