Summary
- During the week ending August 21, U.S. spot Bitcoin and Ethereum ETFs experienced a surge of $2.6 billion in net inflows, marking their strongest performance since October 2025. Total assets under management (AUM) increased by approximately $23 billion.
- Assets in Bitcoin ETFs rose by 25.4% to reach $96.1 billion, while Ethereum ETFs saw a 35.9% increase, climbing to $14.3 billion, according to data from SoSoValue.
- Bitcoin's price increased by about 24%, and Ethereum's by around 30% during the week, spurred by the Treasury doubling its bond-buyback program and a short squeeze that eliminated billions in bearish bets.
Last week, U.S. spot Bitcoin and Ethereum ETFs collectively gained around $23 billion in value, yet only $2.6 billion of this amount stemmed from new investments; the remainder was simply due to the rising prices of Bitcoin and Ethereum.
This distinction is crucial, though it may be overlooked amid the excitement of a market upswing. The growth in a crypto fund's total value—known as assets under management (AUM)—can arise from two sources: fresh capital entering the fund or an increase in the value of the assets already held. In this case, nearly all the increase was due to the latter.
For the week ending August 21, Bitcoin ETFs recorded a net inflow of $1.92 billion, while Ethereum ETFs attracted $697.2 million, making it the best week for both fund types since October 2025, when Bitcoin approached its all-time high.
In terms of AUM, Bitcoin ETF assets surged by 25.4%, rising from $76.6 billion to $96.1 billion. Meanwhile, Ethereum ETF assets jumped 35.9%, increasing from $10.5 billion to $14.3 billion.
When combined, the total AUM for the week grew by approximately $23.3 billion. Excluding the $2.6 billion in new investor contributions, around $20.7 billion of the increase was purely due to price appreciation of Bitcoin and Ethereum, which became more valuable while remaining in the same positions.
Factors Behind the Price Surge
Bitcoin's price surged from roughly $62,000 to over $79,000, marking a 24% weekly increase and its best week since 2023. Ethereum also saw a significant rise, climbing from just below $1,900 to over $2,500, a gain of about 30%.
Three main factors contributed to this price surge. The most significant was the U.S. Treasury's decision to double its long-bond buyback program, aimed at bolstering demand and reducing borrowing costs. This action weakened the dollar, leading investors toward assets like Bitcoin that are often viewed as hedges against inflation.
Additionally, former President Donald Trump met with cryptocurrency executives at the White House, advocating for the Clarity Act, which seeks to clarify the regulatory oversight of various crypto assets. Lastly, as Bitcoin prices broke resistance levels, traders who had bet on a decline were forced to buy back into the market to close their positions, resulting in a short squeeze that wiped out approximately $3 billion in bearish positions within 24 hours, with an additional $1 billion liquidated the following day. Each forced buyback contributed to further price increases and triggered subsequent liquidations.
BlackRock's IBIT captured a significant portion of the new investments, at one point accounting for 83 cents of every dollar flowing into Bitcoin funds in a single day. XRP funds also saw increased demand, bringing in $39.78 million and achieving a record weekly volume of $271.74 million.
Despite the recent rally, the year-to-date figures still reflect losses. Bitcoin ETFs remain in net outflows for the year, and Ethereum ETFs are also down, though the overall deficit has shrunk from $5.7 billion to $3.1 billion.