U.S. Bitcoin ETFs have posted a strong month. Data from SoSoValue shows the funds brought in $2.95 billion over the past 30 days and extended their inflow streak to eight straight trading days on Monday.
Monday was comparatively quiet. Net inflows came in at $31.07 million, the smallest daily total in the current streak. BlackRock’s IBIT again did most of the lifting with $54.84 million in inflows, while Grayscale’s GBTC recorded $23.19 million in outflows and Fidelity’s FBTC lost $10.90 million.
The current run started after a sharp September setback
The latest stretch of positive days for Bitcoin ETFs began on Sept. 17, right after one of the roughest periods in months. On Sept. 15, Bitcoin ETFs lost $450.4 million, their biggest one-day outflow since June 24. That session coincided with the U.S. Senate voting 49-50 against advancing the Clarity Act. The measure needed 60 votes and fell short. Ethereum ETFs lost another $142.3 million that same day.
For the full week, Bitcoin ETFs managed only $6.2 million in net inflows, their smallest weekly inflow in 141 weeks.
Flows rebounded quickly, then cooled
Buyers returned fast. On Sept. 21, Bitcoin ETFs took in nearly $1 billion, their best day since October 2025. Another $715 million followed on Sept. 22.
The pace then slowed. Net inflows dropped to $347 million on Sept. 23, $191 million on Sept. 24, and $134 million on Sept. 25, bringing the weekly total to about $2.4 billion. That marked the biggest weekly haul since October 2025.
Bitcoin moved back above the average ETF holder cost basis
The rally also pushed Bitcoin above the average ETF holder cost basis of $81,722, putting the typical fund investor back in profit for the first time since January. Bitcoin was back above $84,000 on Monday.
Even so, eight straight inflow days is not the longest run of the summer. A nine-day streak ended on Aug. 28, when the funds posted $201.9 million in outflows after Federal Reserve Chair Kevin Warsh spoke at Jackson Hole. The report said the market moved as traders tried to gauge what the Fed might do next on interest rates.
Ethereum, Solana, and XRP products also saw fresh money
Bitcoin was not the only asset drawing demand through these vehicles. SoSoValue data shows Ethereum ETFs added $982.5 million over the past 30 days and $17.1 million on Monday. Solana funds brought in $278.2 million over the month, while XRP funds added $127.05 million.
A ninth straight day of inflows for Bitcoin ETFs would match the August streak.