Fidelity FBTC maintains dominance despite September net outflow

Fidelity’s FBTC maintains its dominance despite the $215 million net outflow on September 15, following a three-week period where U.S. spot Bitcoin ETFs pulled in $3.8 billion in net inflows. This three-week stretch ended around September 5, after the week ending September 5 saw $986.9 million in inflows. This momentum follows an August that saw $3.52 billion in net inflows, which helped offset the $4.5 billion in outflows from June 2026. On September 3, the market recorded a $731 million single-day inflow, with one day alone seeing $1 billion flow into the ETFs. IBIT captured $454 million of that September 3 total, while FBTC added $74 million. These inflows attempt to bridge the gap left by the 29% decline in Bitcoin prices since the start of 2026. Total assets under management for all U.S. spot Bitcoin ETFs stood at $101.3 billion as of late August, though this figure dropped from a $103.3 billion peak. This volatility exists despite Bitcoin hitting a record $108,268 on December 17, 2024. Will these sudden shifts in capital prevent the market from stabilizing?

Market concentration and performance

BlackRock’s IBIT maintains a $60.06 billion AUM, but Fidelity’s FBTC holds $13.22 billion and provides a distinct custodial structure through Fidelity Digital Assets rather than relying on Coinbase. IBIT and FBTC absorbed the majority of new capital throughout 2026 due to their large distribution networks and strong institutional relationships. On January 14, the two funds accounted for over 90% of the $840.6 million daily inflow. On April 17, they represented two-thirds of the $663.9 million daily inflow, and on May 1, they contributed nearly $500 million of a $629.8 million total. FBTC has accumulated $12.1 billion in inflows during its first year of trading. You should note that FBTC returned 25.6% in August, which beat the Digital Assets category average of 22.0%. However, the fund carries a -9.6% return for the year and a -27.3% return over the last year. Smaller products like Franklin Templeton’s EZBC or Valkyrie’s BRRR see daily flows of only a few million dollars. This concentration remains because Bitcoin prices saw a 36% jump following the November presidential election.

Fee structures and custody options

The competition includes the Morgan Stanley Bitcoin Trust, which carries a 0.14% annual expense ratio. This makes it cheaper than the Grayscale Bitcoin Mini Trust, which has a 0.15% fee. FBTC and IBIT both charge an annual fee of 0.25%, which is 70% lower than the Digital Assets category average of 0.84%.

Fidelity provides its own institutional cryptocurrency custody, which reduces counterparty risk compared to funds that use Coinbase. For investors who prefer the lowest possible costs, the Morgan Stanley Bitcoin Trust provides a 0.14% fee, though it lacks the long-term tracking record of the Grayscale Bitcoin Mini Trust. A difference of one basis point between the Morgan Stanley and Grayscale funds amounts to roughly $35 on a $10,000 investment over ten years. FBTC also shows a 1-month return of 21.54%, which is higher than the Digital Assets category average of 12.97%. The fund carries a 14.64% standard deviation and a 2.17 beta.