US spot Bitcoin ETFs posted a record single-day inflow of $433 million on September 18, reversing a week dominated by massive outflows of $450.4 million on September 15 and $296 million on September 16. Fidelity FBTC led the session with $310.7 million, while BlackRock IBIT attracted $108.4 million. Bitcoin responded by holding firmly above $81,000, touching nearly $82,000 between September 19 and 21. Since their January 2024 launch, these ETFs have accumulated approximately $55.1 billion in cumulative net inflows, with total net assets around $102.5 to $103 billion. Net weekly inflow stands at $6.2 million, far below the $1.92 billion recorded in late August.
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