Bitcoin ETF inflows reached $730.9 million on September 3. This was their strongest single trading session since mid-January.
BlackRock’s iShares Bitcoin Trust led the charge. It recorded more than $450 million in new capital.
Why Bitcoin ETF inflows matter
The group posted its largest daily inflow since January 14. That day attracted $843.6 million. Cumulative net inflows since the January 2024 launch have now reached $55.44 billion.
BlackRock accounted for $454 million of Thursday’s inflows. This represented more than 60% of the total. The latest allocation brought the fund’s cumulative net inflows to $63.94 billion.
ARK Invest and 21Shares’ ARKB ranked second with $138 million. Fidelity’s FBTC received roughly $74 million. Grayscale’s two Bitcoin products drew a combined $57 million.
VanEck’s HODL and WisdomTree’s BTCW were the only products to record withdrawals. HODL lost close to $20 million. Approximately $5 million left BTCW.
The inflows arrive as Bitcoin rebounds sharply
The U.S.-listed funds gained between 5.7% and 5.9% during Thursday’s trading session. Their combined net assets climbed to $103.34 billion. This is equivalent to 6.32% of Bitcoin’s market capitalization.
Thursday’s result was more than three times the size of any single daily inflow recorded during an 11-session run of positive flows in late August.
The latest buying followed an active August for the products. U.S. Bitcoin ETFs collected $1.92 billion during the five trading sessions ending August 21. Bitcoin and Ether ETFs together attracted $2.61 billion in their strongest combined week since October 2025.
Bitcoin funds accounted for roughly 73% of those flows. Spot Ether ETFs received $697.47 million during the same five-day period.
ETF flows have remained volatile between large buying sessions
Large inflows have not produced a continuous run of buying across every trading day. The U.S. products recorded $201.9 million in net outflows on August 28. This ended nine consecutive sessions of inflows.
ARK 21Shares’ ARKB led the withdrawals with $114.9 million. IBIT lost $33.4 million. Despite the final negative session, the funds still attracted a combined $924.5 million during the August 24 to August 28 trading week.
Flows reversed again as September began. Investors withdrew $236 million from the funds on September 1. IBIT accounted for roughly $201 million of the redemptions.
SoSoValue data showed the group returned to net buying the following session. It took in approximately $101 million on September 2. IBIT received roughly $115 million. This offset withdrawals elsewhere in the group before Thursday’s much larger allocation.
The $454 million that entered IBIT on September 3 came two sessions after the fund recorded a $201 million withdrawal. BlackRock’s product was on both sides of the largest daily moves during the opening days of September.
The recent swings follow a period when Bitcoin ETF demand had already recovered from sustained withdrawals earlier in the year. The products entered July after eight consecutive negative weeks. This included $527 million in withdrawals during the four trading days ending July 2.
A $221.7 million inflow on July 2 ended a 10-day daily withdrawal run. BlackRock returned to larger allocations days later. IBIT received $209.4 million on July 7 as total daily inflows across the U.S. Bitcoin ETFs reached $265.7 million.
By July 30, another $233.1 million entered the products. BlackRock took $183.4 million. The fund accounted for 78.7% of that session’s inflows.
Thursday’s $730.9 million allocation has now exceeded each of those daily totals. The combined net asset value of the U.S. spot Bitcoin ETF market has moved above $103 billion.
