Fidelity surge brings in $310M BTC saving Bitcoin ETFs from a disastrous week

U.S. spot Bitcoin exchange-traded funds drew $433 million of net inflows on Friday, Sept. 18, according to Farside Investors. The session extended the market's rebound to a second day, but it did not fully repair the withdrawals recorded earlier in the week.

In the Farside data, Fidelity's Wise Origin Bitcoin Fund, or FBTC, supplied $310.7 million on Friday. That was nearly 2.9 times the $108.4 million added by BlackRock's iShares Bitcoin Trust, known as IBIT. Bitwise's BITB, ARK 21Shares' ARKB and VanEck's HODL also posted smaller positive flows, giving the session more than one meaningful source of demand.

The issuer split marked a reversal from the earlier rebound. Monday's return to inflows was led by BlackRock, with Fidelity playing a secondary role. By Friday, Fidelity was the largest contributor while IBIT remained positive.

The broader two-day picture was less decisive. Thursday and Friday generated $592.5 million of combined inflows after investors withdrew $746.3 million on Tuesday and Wednesday. The rebound therefore left a $153.8 million gap against those two losing sessions.

Monday's $159.9 million inflow was enough to push the five-session total barely above zero. The week ended with $6.1 million of net inflows, underscoring how little separated the recovery from a negative weekly result.

Friday also did not overturn the weekly issuer ranking. IBIT accumulated $120.6 million across the five sessions, compared with $79.9 million for FBTC. Fidelity led the latest session, but BlackRock still attracted more capital over the full week.

That distinction matters for judging whether demand has genuinely broadened. Friday showed that the rebound was no longer dependent on IBIT alone, but a single session cannot establish a lasting change in how investors are allocating money across the funds. The weekly totals still point to BlackRock as the larger net beneficiary.

The withdrawals landed on Sept. 15 and Sept. 16, the day before and the day of the Federal Reserve's decision to raise its target range by 25 basis points to 3.75% to 4.00%. The timing provides context, but the available data does not show that the policy decision caused either the outflows or the subsequent rebound.

The next ETF sessions will show whether Fidelity and the smaller issuers continue to contribute alongside BlackRock. For now, the evidence supports a narrower conclusion: participation broadened on Friday, the rebound recovered most of the midweek damage, and the week itself remained close to flat.

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