U.S. spot Bitcoin ETFs attracted $2.4bn in the week ending 25 September, their strongest weekly inflow since October 2025, taking their net flows for 2026 into positive territory.
The funds were around $5.8bn down for the year as recently as 13 July. Last week’s inflows left them approximately $934.1m ahead for 2026, with the year-to-date position turning positive on Tuesday.
The previous larger weekly inflow was the $2.7bn recorded in the week ending 10 October 2025, when bitcoin reached a then-record price of $126,296.
Most of last week’s investment arrived on Monday, when the 12 publicly traded Bitcoin ETFs tracked by SoSoValue received $999m. It was their biggest single-day inflow since 6 October 2025 and the ninth-largest since the products launched in January 2024.
Inflows then fell each day, reaching $714.7m on Tuesday, $347m on Wednesday, $190.6m on Thursday and $134.5m on Friday. Friday extended the funds’ run to seven consecutive days of inflows, totalling $3bn since 17 September.
BlackRock’s IBIT led the weekly figures with $1.2bn, its second-biggest weekly inflow since October 2025, behind the $1.3bn recorded in the week ending 21 August.
Fidelity’s FBTC, second for assets under management and volume market share, added $701.7m – its strongest week since 8 September 2025. ARKB, run by Ark and 21Shares, received $294.7m, almost all of it on Monday.
Morgan Stanley’s MSBT attracted $203.3m, its best week since launching in April. Its previous weekly high had been $71.1m in mid-April.
Cumulative net inflows since launch reached $57.6bn, while net assets stood at $108.4bn on Friday. Bloomberg ETF analyst Eric Balchunas linked the $4.6bn increase in cash to the Treasury Department’s plan to increase buybacks of long-dated bonds.
Nate Geraci, president of NovaDius Wealth Management, said in a Saturday post that the funds had received $5.3bn since the Treasury first announced the buybacks. “Monday’s $1bn inflow was 9th largest ever,” he wrote.
Bitcoin ETF trading volume fell to $15bn from $16.2bn the previous week, according to The Block’s analysis of SoSoValue data.
Ether, Solana and XRP funds also attract money
Spot Ether ETFs recorded $689.9m of inflows, reversing the $140m outflow from the previous week. Monday produced $270m, their best single day since 7 October 2025, followed by daily inflows between $66m and $162.3m.
BlackRock’s ETHA led with $326.2m, ahead of Fidelity’s FETH at $174m and Grayscale’s Ethereum Mini Trust at $100.3m. BlackRock’s ETHB added $47.5m, including $31.9m on Friday.
The weekly total was the funds’ highest since the week ending 28 August, when they received $824.4m. Ether ETFs are now up about $1.6bn in 2026, with $17.8bn in net assets and $13.9bn in cumulative inflows since launch. Trading volume declined to $4.8bn from $6.9bn.
Spot Solana ETFs received $188.2m, including a record daily inflow of $86.7m on Friday. Bitwise’s BSOL accounted for $55.7m. The weekly total was second only to the $199.2m recorded during their launch week.
Their combined assets reached a record $1.5bn, up from $1.2bn a week earlier, with BSOL holding about 71%. Spot XRP ETFs added $75.6m, while Grayscale’s Zcash fund, ZCSH, briefly exceeded $1bn in net assets on Thursday.
