US spot Bitcoin ETFs attracted $986.9 million in net inflows for the week ending September 5, capping off a three-week streak that has funneled $3.8 billion into these products. Early 2026 was rough for Bitcoin ETF flows, with year-to-date net figures still sitting at approximately negative $1 billion. Three consecutive weeks of heavy buying haven’t erased that deficit, but they’ve dramatically narrowed it.

Daily inflows during the week were anything but evenly distributed. Thursday alone accounted for roughly $731 million in net new capital, the largest single-day haul since January 14. Friday cooled off to $174.6 million. BlackRock’s iShares Bitcoin Trust (IBIT) was responsible for $117.4 million of that total, while Fidelity’s Wise Origin Bitcoin Fund (FBTC) contributed $57.2 million.

Total assets under management across all US spot Bitcoin ETFs stood at $101.3 billion as of the latest data, after briefly touching $103.3 billion during the week. Since their collective launch in January 2024, these funds have accumulated $55.6 billion in cumulative net inflows.

Bitcoin’s price during the week hovered near $80K, dipping briefly below $79K before recovering to roughly $79,700. Spot Ether ETF inflows dropped 74% week-over-week, while XRP ETF products saw an 83% decline.

August 2026 delivered $3.5 billion in total Bitcoin ETF inflows, marking the strongest month since September 2025.

That the year-to-date figure still sits around negative $1 billion, even after $3.8 billion in three-week inflows, illustrates just how severe the earlier exodus was.

The $101.3 billion in combined AUM across all spot Bitcoin ETFs represents a significant chunk of Bitcoin’s total market capitalization. At current prices near $80K, Bitcoin’s fully diluted market cap sits in the neighborhood of $1.6 trillion, meaning these ETFs collectively hold somewhere around 6% of all Bitcoin that will ever exist.