U.S. spot Bitcoin exchange-traded funds (ETFs) have reached a significant milestone, accumulating $149.64 billion in total net assets, which constitutes 6.57% of Bitcoin’s overall market capitalization. In a parallel development, U.S. spot Ethereum ETFs have accumulated a combined total of $28.51 billion, making up 5.35% of Ethereum’s market cap. Notably, between April and August 2025, Ethereum funds experienced remarkable success, garnering over $11 billion in net inflows.
However, the narrative shifted recently as Bitcoin ETFs recorded their highest weekly inflows since July, marking a new trend after previously losing momentum to Ethereum funds, which are now seeing a decrease in activity. According to recent data from SoSoValue, Bitcoin ETFs witnessed $552.78 million in daily total net inflows on September 11, leading to a total weekly inflow of $1.7 billion. This upward trend began with a strong showing on September 10, where Bitcoin funds reflected daily net inflows of $757.14 million, a figure not seen in the past two months.
From mid-July through the end of August, the dominance of Ethereum ETFs, combined with mixed macroeconomic signals from the U.S., prompted investors to shy away from Bitcoin. This shift evidently placed downward pressure on Bitcoin’s price amid a broader market consolidation. Nevertheless, expectations surrounding upcoming favorable news from the U.S. Federal Reserve and the prospect of major Bitcoin ETF issuer BlackRock potentially tokenizing its ETF offerings have reignited institutional interest in Bitcoin, at least for the time being. Consequently, Bitcoin’s price has reacted positively, increasing by 2.22% over the past week to reach $115,001.
In contrast, Ethereum ETFs have experienced a decline in inflows, according to SoSoValue. On September 11, they recorded daily total net inflows of $113.12 million, marking the fourth day of this modest inflow streak and accumulating a weekly total of $232.14 million after accounting for earlier outflows. Following a historic five-month inflow period that amassed over $11 billion, current sentiment shows a downturn, with Ethereum funds experiencing $555.6 million in monthly total net outflows this September. Despite these challenges, the price of Ethereum has remained resilient, registering a 2.5% increase over the past week with current trading sitting at $4,512.
Overall, as Bitcoin rebounds from its recent struggles, the dynamics within the ETF market highlight a notably fluctuating environment influenced by both investor sentiment and macroeconomic developments.
