US spot Bitcoin exchange-traded funds recorded $999 million in net inflows on Monday, Sept. 21, according to Farside Investors data, as Bitcoin held above $86,000. BlackRock’s IBIT led the daily inflow with $381 million, followed by ARK 21Shares’ ARKB with $289 million and Fidelity’s FBTC with $239 million. Morgan Stanley’s MSBT added $62 million, Bitwise’s BITB took in $22 million, and Grayscale’s GBTC posted a small $3 million inflow.
The strong session marked the third consecutive day of net inflows, bringing total Bitcoin ETF inflows since Sept. 17 to roughly $1.59 billion. That rebound followed two heavy redemption days earlier in the month, when the funds shed $450 million on Sept. 15 and $296 million on Sept. 16. Bitcoin traded at about $86,558 Wednesday morning in Asia, up 1.25% over 24 hours and 13.9% over the past week. Ether traded near $2,764, up 0.5% on the day and 15.2% on the week.
Spot Ether ETFs also drew $270 million on Sept. 21, with BlackRock’s ETHA contributing $110 million, Fidelity’s FETH $73 million, and Grayscale’s Ethereum Mini Trust $59 million. The Monday figure followed $144 million of Ether ETF inflows on Sept. 18. Total crypto market capitalization stood at $3.04 trillion, up 1.1%, while the Fear & Greed Index read 78, in “greed” territory.
Bloomberg Intelligence Senior ETF Analyst Eric Balchunas separately flagged new activity in US spot Bitcoin ETFs, though specific metrics had not been independently verified at the time of publication. Net flow figures measure the difference between new capital entering funds and redemptions, and large sustained inflows tend to require ETF issuers to purchase Bitcoin on the open market. Despite the rebound, Bitcoin remains about 31% below its all-time high of $126,080 from October 2025, and Ether is 44% below its August 2025 peak of $4,946. Tuesday’s ETF flow data was not yet available.
