BlackRock-Driven ETF Inflows Drain Exchange Reserves
Roughly $2.4 billion in net inflows poured into US spot Bitcoin ETFs during the week ending September 25, marking the strongest weekly haul since early October 2025.
The capital influx didn't just pad fund balances; it physically removed Bitcoin from the liquid supply pool. BlackRock's IBIT led the charge with approximately $1.2 billion in weekly inflows, maintaining its position as the dominant vehicle for institutional Bitcoin exposure.
Fidelity's FBTC followed at about $702 million, with ARK 21Shares' ARKB contributing approximately $295 million. Since launching in January 2024, cumulative net inflows across all US spot Bitcoin ETFs have now surpassed $57 billion, with total assets under management sitting at roughly $108 billion.
On the other side of the equation, centralized exchanges saw net outflows of about 31,782 BTC, worth roughly $2.52 billion at current prices. Binance alone accounted for nearly 19,500 BTC in withdrawals, more than half the total.