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U.S. spot bitcoin ETFs recorded a $433 million inflow on Friday, leaving the group with a $6.2 million net inflow for the week ending Sept. 18. Ether ETFs posted a $140 million weekly outflow, ending a four-week streak that had brought in a combined $1.94 billion.
Why it matters
Bitcoin funds absorbed $462.7 million of outflows the previous week, but the latest result was still barely positive after heavy withdrawals on Tuesday and Wednesday. Friday's buying was the category's largest daily inflow since Sept. 3, with Fidelity's FBTC taking in $310.7 million and BlackRock's IBIT adding $108.4 million.
Bitcoin ETF net flows remain about $1.45 billion lower for the year, although cumulative inflows since launch stand at $55.16 billion and net assets reached $102.53 billion. Ether ETFs remain positive for the year with roughly $922 million in net inflows and $16.72 billion in net assets.
Market impact
The weekly split points to uneven institutional demand rather than a broad-based ETF flow trend. Bitcoin funds finished the week barely above zero after Friday's recovery, while ether products could not offset $404.8 million drained across Tuesday through Thursday. BlackRock's ETHA drew $114.3 million on Friday but still ended the week down $56.1 million, while Fidelity's FETH lost $25.8 million.
Trading activity increased across both categories. Bitcoin ETF volume rose to $16.17 billion from $8.77 billion the prior week, while ether ETF volume climbed to $6.82 billion from $5.14 billion. The prior period included one fewer trading session because of Labor Day.
Frequently asked questions
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How did bitcoin ETF flows finish the week?
Bitcoin ETFs recorded a $6.2 million net inflow for the week ending Sept. 18, after taking in $433 million on Friday.
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Which bitcoin ETF drove Friday's inflows?
Fidelity's FBTC led Friday's recovery with $310.7 million in inflows. BlackRock's IBIT added another $108.4 million.
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Why did ether ETFs report a weekly outflow?
Ether ETFs lost $404.8 million across Tuesday through Thursday, and later inflows were not enough to offset those withdrawals.
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How large was the ether ETF outflow?
Ether ETFs posted a $140 million outflow for the week, ending a four-week inflow streak worth a combined $1.94 billion.
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Did ETF trading activity increase during the week?
Yes. Bitcoin ETF volume rose to $16.17 billion from $8.77 billion, while ether ETF volume increased to $6.82 billion from $5.14 billion.
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