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 21Share...