U.S. spot Bitcoin exchange-traded funds drew $2.4 billion in net inflows during the week ending Sept. 25, their strongest weekly result since October 2025, a surge that pushed their flow total for 2026 back above zero. According to SosoValue data, year-to-date inflows now stand at about $934.1 million, reversing a deficit that stood near $5.8 billion two months earlier, in mid-July. That marks a swing of roughly $6.7 billion in cumulative flows over about two months.

BlackRock's IBIT led all issuers with $1.2 billion for the week, followed by Fidelity's FBTC at $701.7 million and Ark and 21Shares' ARKB at $294.7 million. Ether ETFs reversed a roughly $140 million outflow from the prior week with $689.9 million in inflows, lifting their 2026 net additions to about $1.6 billion. Solana ETFs registered a record $86.7 million single-day inflow as weekly demand reached $188.2 million and combined assets rose to $1.5 billion. Net inflows tally creations of new fund shares against redemptions, and because spot products hold the underlying asset directly, sustained creations add to the funds' holdings of the coins themselves.

Monday provided the week's largest daily share with a $999 million inflow. Daily additions then slowed through Friday, but the funds extended their streak to seven consecutive sessions. products reversed the previous week's outflow, while Solana funds recorded their largest single-day intake since their October 2025 launch.

Bitcoin ETFs Extend Seven-Day Inflow Streak to $3 Billion

The 12 Bitcoin ETFs collected $714.7 million on Tuesday after Monday's near-billion-dollar opening. They added $347 million on Wednesday, $190.6 million on Thursday, and $134.5 million on Friday. That sequence took the seven-session run, which began Sept. 17, to $3 billion.

The prior week brought Bitcoin ETFs only $6.2 million, despite a $433 million addition on Friday. Monday's $999 million total ranks as the ninth-largest daily intake since these products launched in January 2024, and it marks their largest daily result since Oct. 6, 2025. Every session of the streak recorded net inflows.

BlackRock's IBIT drove weekly demand with $1.2 billion, its second-largest weekly intake since October 2025. Fidelity's FBTC followed with $701.7 million, its best result since the week of Sept. 8, 2025. Ark and 21Shares' ARKB received $294.7 million, with most of that total arriving during Monday's session.

Morgan Stanley's MSBT added $203.3 million, setting a weekly record since its April debut. Its previous high was $71.1 million in mid-April. These allocations spread demand beyond the two largest funds, although IBIT and FBTC still accounted for the bulk of the total.

Bitcoin ETFs held $108.4 billion in net assets by Friday, and their cumulative inflows since launch reached $57.6 billion. Weekly trading volume fell to $15 billion from $16.2 billion even as subscriptions rose, meaning the funds attracted more new capital during a week with less secondary-market turnover.

The latest run followed the Treasury Department's plan to increase buybacks of long-dated bonds. Market commentary has linked $5.3 billion in Bitcoin ETF inflows since the Treasury announcement to the buyback plan. The timing provides liquidity context for the reversal, although fund data do not establish a single cause.

Ether and Solana ETFs Record Strong Weekly Inflows

Ether ETFs collected $689.9 million during the week after losing about $140 million in the prior period. Monday brought $270 million, their strongest daily result since Oct. 7, 2025. Daily additions then ranged from $66 million to $162.3 million across the next four sessions.

BlackRock's ETHA led the group with $326.2 million, while Fidelity's FETH attracted $174 million. Grayscale's Ethereum Mini Trust added $100.3 million, and BlackRock's ETHB received $47.5 million, including $31.9 million on Friday.

Ether ETFs now show about $1.6 billion in net inflows for 2026. Net assets reached $17.8 billion, while cumulative inflows since launch stand at $13.9 billion. Weekly trading volume declined to $4.8 billion from $6.9 billion.

Solana ETFs took in a record $86.7 million on Friday, their largest daily inflow since launching in late October 2025. Bitwise's BSOL supplied $55.7 million, or about 64% of that amount. Weekly inflows reached $188.2 million, trailing only the products' $199.2 million launch week.

Friday's record closed a week that finished $11 million below the launch-period peak. Combined fund assets rose by $300 million, or about 25%, across the same period, taking the group from $1.2 billion to a record $1.5 billion. BSOL holds about 71% of those assets.

Spot XRP ETFs added $75.6 million for the week, while Grayscale's Zcash fund briefly crossed $1 billion in net assets on Thursday, extending the week's inflows beyond Bitcoin, Ether, and Solana products—a marker of how quickly the single-asset crypto ETF lineup has broadened since the first spot Bitcoin funds debuted in January 2024. The coming days of flow data will show whether the seven-session streak extends and how broadly demand holds across that expanding roster.

Originally published on Blockonomi.