Bitcoin ETFs attract $2.4B in largest inflow week since October 2025

US spot Bitcoin ETFs just had their best week in nearly a year. The products collectively pulled in $2.4 billion in net inflows for the week ending September 25, a haul not seen since early October 2025. That single week was enough to flip an ugly trend line. Year-to-date net flows for spot Bitcoin ETFs now sit at roughly +$934 million, a remarkable recovery considering the category was staring down a deficit of approximately $5.8 billion as recently as mid-July. Where the money went BlackRock’s iShares Bitcoin Trust (IBIT) absorbed the lion’s share, attracting approximately $1.2 billion of the week’s total. Fidelity’s FBTC came in second with roughly $702 million in net inflows. ARK 21Shares’ ARKB rounded out the top three at approximately $295 million. Between them, these three products accounted for more than 90% of the week’s capital. The daily pattern told its own story. Monday saw inflows peak at nearly $999 million, a figure that would have been noteworthy as a standalone weekly total just months ago. But momentum faded as the week progressed, with Friday’s inflow dwindling to $135 million. That deceleration wasn’t random. Bitcoin briefly touched $87,000 early in the week be...