Spot Bitcoin ETFs see $3B in purchases over 9 days as institutional appetite returns

After months of bleeding capital, US spot Bitcoin ETFs just pulled off a nine-day winning streak that funneled roughly $3 billion back into the products. The surge, which kicked off on September 17, marks the most aggressive stretch of institutional buying since the post-launch euphoria faded, and it flipped year-to-date flows from deep red to a modest positive.

For a category that was sitting roughly $5.8 billion underwater at the midpoint of the year, clawing back to approximately $934 million in net positive flows is the kind of reversal that gets portfolio managers to stop doom-scrolling and start allocating again.

The numbers behind the streak

The week ending September 25 was the headline grabber, pulling in roughly $2.4 billion in net inflows. That’s the fattest weekly haul since October 2025, when Bitcoin was trading near its all-time high of around $126,000.

September 21 stood out as the single best day, with nearly $999 million flowing into spot Bitcoin ETFs.

BlackRock’s iShares Bitcoin Trust, known by its ticker IBIT, dominated the leaderboard with approximately $1.2 billion in inflows for that week alone. Fidelity’s FBTC followed with around $702 million, and ARK 21Shares’ ARKB brought in roughly $295 million. Together, those three products accounted for more than 90% of the capital entering the space.

Context: a rough year gets a late rescue

To appreciate how meaningful this September rally is, you need to understand how ugly things looked just weeks earlier. By July, cumulative 2026 net flows had sunk to around negative $5.8 billion. Bitcoin had fallen roughly 34% from its peak near $126,000 in October 2025.

Bitcoin’s spot price stabilized in the $83,000 to $87,000 range during the inflow streak, ticking up slightly on a week-over-week basis.

Since their launch in January 2024, US spot Bitcoin ETFs have now accumulated more than $57 billion in cumulative net inflows. Total assets under management across the category approached $108 billion by late September.

Who’s buying and why it matters

IBIT’s outsized share suggests that the largest, most risk-conscious allocators are the ones stepping back in. Fidelity’s strong showing reinforces this thesis. FBTC has built its reputation on the back of Fidelity’s enormous retail brokerage network and its institutional custody infrastructure. When both IBIT and FBTC are pulling in capital simultaneously, it signals broad-based demand rather than a single whale making a directional bet.

ARK 21Shares’ ARKB rounding out the top three adds a growth-oriented flavor. Cathie Wood’s ARK Invest has long been one of Bitcoin’s most vocal institutional advocates.

A 34% drawdown from the October 2025 peak represents exactly the kind of entry point that value-conscious institutional buyers wait for. Buying Bitcoin at $84,000 when it was recently $126,000 carries a different psychological profile than chasing it at all-time highs.

Daily inflows did taper slightly after the September 21 peak, but the streak held positive through at least September 29.