BlackRock's IBIT Leads US Bitcoin ETF Inflows with $381M in One Week

Institutional investors have shown renewed interest in Bitcoin, as evidenced by significant inflows into US spot Bitcoin and Ether ETFs. On September 23, these ETFs collectively saw approximately $452 million in net inflows, with BlackRock’s iShares Bitcoin Trust (IBIT) leading the charge.

IBIT attracted $381.4 million on September 21 and $350.3 million on September 22, solidifying its position as a dominant player in the US Bitcoin market. This influx follows a period of substantial outflows, where Bitcoin ETFs experienced a loss of roughly $746 million on September 15 and 16. The recent inflow streak, which lasted four days, saw total net new investments between $2.1 billion and $2.3 billion.

During this time, Bitcoin's price remained stable, fluctuating between $84,000 and $87,000. Overall, total assets across all US spot Bitcoin ETFs reached approximately $111 billion, with IBIT alone accounting for about $67.9 billion, or 61% of the market.

Ether ETFs Also Gain Traction

Notably, Ether ETFs have also benefited from this trend, with inflows estimated between $162 million and $270 million in recent trading days. BlackRock’s iShares Ethereum Trust (ETHA) pulled in $50.8 million on September 23, making it the largest contributor to a day that saw $105 million flow into US spot Ethereum ETFs collectively.

The cumulative net inflows into ETHA have now surpassed $13 billion, highlighting its significant role in the US Ethereum ETF market, which has exceeded $17 billion in total net assets. This growth reflects a broader institutional preference for ETF structures, which offer regulated custody and integration with existing brokerage accounts.