Bitcoin ETFs experienced significant inflows on September 18, 2026, with total net flow of $433 million across multiple funds. BlackRock's IBIT led with $108.4 million inflow, followed by Fidelity's FBTC with $310.7 million, reflecting continued institutional demand for Bitcoin spot ETFs.
Fidelity's Bitcoin ETF (FBTC) recorded a daily inflow of $310.7 million on September 19, 2026, according to Farside Investors' tracking data.
Bitcoin ETF flows showed a net outflow of $295.9 million on September 16, 2026, with major declines in IBIT (-$144.1M), ARKB (-$84.4M), and FBTC (-$52.7M), while MSBT saw a small inflow of $3.5M.