BlackRock and Fidelity Dominate Bitcoin ETF Inflows Amid Market Concentration

US spot Bitcoin ETFs experienced a significant influx of funds on their most recent trading day, pulling in a combined $346.9 million in net inflows.

The majority of these inflows were concentrated among BlackRock's IBIT and Fidelity's FBTC, which together accounted for approximately 89% of the total positive flows.

BlackRock's IBIT led all issuers with $166.3 million in net inflows, followed closely by Fidelity's FBTC at $143.2 million and Morgan Stanley's MSBT at $32.4 million.

The concentration of flows in these two funds reflects their market leadership, as institutional allocators increasingly favor the funds with the deepest trading volume and tightest spreads when adding or trimming bitcoin exposure.