US spot Bitcoin exchange-traded funds attracted $159.9 million on September 14, ending four consecutive sessions of withdrawals. However, the rebound was heavily concentrated among a small group of issuers, with most other funds recording minimal activity or outflows.
BlackRock's iShares Bitcoin Trust (IBIT) led the recovery with $134.3 million in inflows, while Fidelity's Wise Origin Bitcoin Fund (FBTC) added $53.3 million. Together, the two products supplied $187.6 million to the market. Other funds showed mixed results: ARK 21Shares Bitcoin ETF (ARKB) recorded $42 million in outflows, Franklin Templeton's EZBC added $4.6 million, and Morgan Stanley's MSBT took in $9.7 million.
The one-day inflow erased approximately 35 percent of losses from the prior four sessions, which had removed $462.7 million from the market. Across the five-day period through September 14, spot Bitcoin ETFs recorded roughly $302.8 million in net outflows.
BlackRock's Outsized Share
IBIT has accumulated approximately $1.08 billion worth of Bitcoin over the past 20 days, according to blockchain data from Arkham Intelligence. The fund recorded positive flows on seven of those sessions. Over the same period, Grayscale's GBTC reduced its Bitcoin holdings by about $254.7 million, illustrating the uneven distribution of capital across the ETF market.
The concentration in IBIT reflects investor preference rather than a proprietary wager by BlackRock. New fund creations require Bitcoin to be added to the trust's holdings as investors purchase exposure through the ETF.
Fed Meeting as a Test
The return to inflows comes immediately before the Federal Reserve's September 15-16 policy meeting. Investors had already demonstrated caution by withdrawing funds from spot Bitcoin ETFs during the four sessions preceding Monday's rebound.
The Fed's decision on interest rates and economic outlook could shift demand for risk assets more broadly. Future ETF reports will indicate whether subsequent inflows broaden beyond BlackRock and Fidelity or whether Monday's recovery proves temporary. Sustained concentration in IBIT and FBTC alongside weakness elsewhere would reinforce existing patterns, while renewed redemptions could characterize the September 14 inflow as merely a pause in a broader selloff.
