SKN | Bitcoin ETFs Draw $1.92 Billion in Strongest Weekly Inflow Since October as Institutional Demand Returns

U.S. spot Bitcoin ETFs recorded their strongest weekly inflow since October 2025, attracting approximately $1.92 billion in fresh capital during the five trading sessions through August 21. The surge coincided with Bitcoin’s sharp recovery toward the $79,000 area and came as changing Treasury-market conditions, regulatory developments, and renewed institutional participation improved the broader backdrop for digital assets.

For professional crypto investors, the significance of the move extends beyond Bitcoin’s price performance. ETF flows provide a direct measure of institutional demand, while the simultaneous decline in long-term yields and weakness in the dollar created a more supportive environment for scarce and alternative assets.

Bitcoin ETF Demand Reaches a Ten-Month High

According to SoSoValue data reported by multiple market sources, U.S. spot Bitcoin ETFs recorded five consecutive days of net inflows between August 17 and August 21. The strongest session came on August 20, when the funds attracted approximately $606.3 million, followed by another $307.45 million on August 21.

The weekly total of $1.92 billion represents the strongest inflow since October 2025. Bitcoin ETF trading volume also accelerated sharply, reaching approximately $22.1 billion for the week, more than triple the previous week’s level. Net assets held by U.S. spot Bitcoin ETFs rose to approximately $96.07 billion.

BlackRock’s iShares Bitcoin Trust (IBIT) remained the dominant vehicle. On August 20 alone, IBIT attracted approximately $503 million, while the broader Bitcoin ETF market recorded $606.3 million in inflows.

Ethereum ETFs Add Nearly $700 Million

Institutional demand was not limited to Bitcoin. U.S. spot Ethereum ETFs attracted approximately $697.2 million during the same five-day period, also marking their strongest weekly inflow since October 2025.

The combined $2.6 billion flowing into Bitcoin and Ethereum ETFs represents a major reversal from the previous week, when the two categories recorded approximately $392 million in combined outflows. The shift suggests that institutional positioning toward major digital assets strengthened significantly as prices recovered.

For the broader market, the importance lies in the breadth of the flow rather than Bitcoin alone. Ethereum’s participation indicates that institutional demand is extending into the second-largest cryptocurrency, potentially reflecting greater willingness to allocate across established digital-asset networks.

Treasury Buybacks Create a More Supportive Macro Backdrop

The ETF surge coincided with a major development in U.S. government bond markets. The Treasury announced that it would double the size of planned buybacks of 10- to 30-year debt to at least $4 billion per operation, seeking to improve liquidity in longer-duration Treasuries after yields had risen sharply.

The announcement initially pushed long-term Treasury yields lower and weakened the U.S. dollar. Reuters reported that the move helped lift assets including Bitcoin and gold, illustrating how changes in fixed-income markets can rapidly affect cross-asset positioning.

Looking ahead, investors will watch whether ETF inflows remain persistent after the initial price rally fades. Sustained institutional creations would provide stronger evidence of structural demand, while a reversal in flows, renewed Treasury-yield pressure, or a stronger dollar could challenge the current momentum. The key question is whether the August surge represents a temporary repricing or the beginning of a more durable return of institutional capital to digital assets.