Fidelity leads $433M Bitcoin ETF inflows, but week ends nearly flat

U.S. spot Bitcoin ETFs drew $433 million of net inflows on Friday, Sept. 18, according to Farside Investors. Fidelity's Wise Origin Bitcoin Fund, or FBTC, contributed $310.7 million, compared with $108.4 million for BlackRock's iShares Bitcoin Trust, known as IBIT. FBTC's inflow was nearly 2.9 times IBIT's contribution. Bitwise's BITB, ARK 21Shares' ARKB and VanEck's HODL also recorded smaller positive flows. Friday extended the market's rebound to a second day, but it did not fully offset earlier withdrawals. Monday's return to inflows was led by BlackRock, while Fidelity played a secondary role. Thursday and Friday produced $592.5 million of combined inflows after investors withdrew $746.3 million on Tuesday and Wednesday, leaving a $153.8 million gap. Monday's $159.9 million inflow pushed the five-session total slightly above zero, and the week ended with $6.1 million in net inflows. Across the full week, IBIT accumulated $120.6 million, compared with $79.9 million for FBTC, so BlackRock remained the larger net beneficiary despite Fidelity leading on Friday. Friday showed broader participation beyond IBIT, but one session did not establish a lasting change in fund allocation. The withdrawals occurred 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 available data does not show that the policy decision caused either the outflows or the rebound. The next ETF sessions will indicate whether Fidelity and smaller issuers continue contributing alongside BlackRock.