Fidelity's $310M Boost Keeps US Spot Bitcoin ETFs From Ending the Week in the Red
AI Market Summary
U.S. spot Bitcoin ETFs recorded a strong $433M net inflow on Sept. 18, led by Fidelity's FBTC (+$310.7M), showing demand was not solely driven by BlackRock's IBIT. However, the two-day rebound only partially offset midweek outflows, leaving the week nearly flat (+$6.1M). The flow pattern suggests tactical reallocations around macro uncertainty rather than a clear, durable shift in institutional risk appetite.
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US spot Bitcoin exchange-traded funds (ETFs) recorded $433 million in net inflows on Friday, Sept. 18, according to data from Farside Investors, extending the market's rebound for a second straight session but still leaving earlier-week damage only partly repaired.
Fidelity's Wise Origin Bitcoin Fund (FBTC) dominated Friday's intake with $310.7 million, nearly 2.9 times the $108.4 million added to BlackRock's iShares Bitcoin Trust (IBIT). Bitwise's BITB, ARK 21Shares' ARKB and VanEck's HODL also posted smaller gains, signaling demand came from more than one issuer.
The mix marked a shift from the prior rebound. Monday's return to inflows was led by BlackRock, with Fidelity in a supporting role. By Friday, Fidelity was the top contributor while IBIT remained in positive territory.
Across Thursday and Friday, inflows totaled $592.5 million, following $746.3 million of withdrawals on Tuesday and Wednesday. That left a $153.8 million shortfall versus the two losing sessions.
Monday's $159.9 million inflow was enough to keep the five-session tally marginally positive. The week finished with just $6.1 million of net inflows, highlighting how close the market came to posting a negative weekly result.
Friday's surge did not change the weekly leader board. IBIT brought in $120.6 million over the five sessions, versus $79.9 million for FBTC. Fidelity led the latest session, but BlackRock still drew more capital across the full week, an important distinction when assessing whether demand is meaningfully broadening.
The largest withdrawals occurred on Sept. 15 and Sept. 16, immediately around the Federal Reserve's decision to lift its target range by 25 basis points to 3.75% to 4.00%. The timing offers context, but the available data does not establish a causal link between the policy move, the outflows, or the subsequent rebound.
Upcoming ETF sessions will indicate whether Fidelity and smaller issuers can continue to contribute alongside BlackRock. For now, the data supports a narrower takeaway: participation widened on Friday, the rebound recouped most of the midweek losses, and weekly flows ended essentially flat.
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