US spot Bitcoin ETFs took in $2.4 billion in the week to September 25, their largest weekly intake since October 2025, which flipped the funds' 2026 net flows positive for the first time this year. That reverses a deficit that ran past $5 billion at its worst, including the first losing half the products have recorded. The bid absorbed selling pressure through a week in which the Nasdaq and S&P 500 both fell on the yield spike.