BlackRock and Fidelity are quietly turning bitcoin ETFs into a two-firm market
U.S. spot bitcoin ETFs have consolidated into a two-fund market dominated by BlackRock’s IBIT and Fidelity’s FBTC. Eighteen months after launch, these two funds account for most new institutional inflows, while smaller issuers now have little effect on overall sector flows. In 2026, major inflow days repeatedly showed IBIT and FBTC capturing the bulk of demand, often more than two-thirds and sometimes over 90% of total net inflows. This concentration has emerged amid a weak year for bitcoin and crypto ETFs, with bitcoin down about 29% year to date and several periods of heavy redemptions. Investors appear to favor the largest, most liquid, and best-distributed products, making BlackRock and Fidelity the default choices for advisers and institutional allocators. Smaller funds from Franklin Templeton, VanEck, Valkyrie, WisdomTree, Bitwise, and Ark now play a secondary role in a winner-take-most market.
