BlackRock clients buy $117M worth of Bitcoin through IBIT in a single day

BlackRock’s iShares Bitcoin Trust pulled in $117.4 million in a single trading session on September 4, 2026, as clients continued to channel capital into the world’s largest spot Bitcoin ETF. The daily haul pushed total U.S. spot Bitcoin ETF inflows to $174.6 million that day, with Fidelity’s FBTC contributing the remaining $57.2 million. A day earlier, IBIT alone had absorbed $454 million, which puts the two-day combined figure well above half a billion dollars. How IBIT actually works Worth clarifying: BlackRock is not buying Bitcoin for itself. The firm has been explicit that it only transacts in Bitcoin when clients instruct it to through the fund, acting as an intermediary rather than a principal investor. Inflows and outflows correspond directly to creations and redemptions in the ETF structure, meaning every net inflow day represents actual Bitcoin being purchased on behalf of clients in the open market, handled in partnership with custodians like Coinbase Prime. That $117.4 million is not an accounting abstraction. The bigger picture behind one day’s number Cumulative net inflows into IBIT have now exceeded $60 billion since the fund launched in January 2024, cementing its ...