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Bitcoin ETFs just saw their biggest day in a month thanks entirely to BlackRock

Reported by Coindesk
Oct 20, 2026· 2 min read
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Key Takeaways
  • • U.S. spot bitcoin ETFs took in $526.6 million on Monday, the largest daily net inflow in nearly a month, according to SoSoValue data cited by CoinDesk.
  • • BlackRock's iShares Bitcoin Trust (IBIT) accounted for the entire net inflow with $665.2 million, its largest daily inflow since Oct. 7 of last year.
  • • Fidelity's FBTC lost $83.6 million and Grayscale's GBTC shed $54.9 million, while the remaining funds recorded no net flows.
  • • Bitcoin ETFs remain about $90.5 million in outflows for October despite the Monday inflow, which offset last week's $228.5 million of withdrawals.
  • • Ether ETFs lost $103.3 million, a fourth consecutive session of outflows, with BlackRock's ETHA responsible for $95.4 million of that.
Summary
U.S. spot bitcoin exchange-traded funds attracted $526.6 million on Monday, their largest daily net inflow in nearly a month, according to CoinDesk, which relied on SoSoValue data. The inflow was driven entirely by BlackRock's iShares Bitcoin Trust (IBIT), which pulled in $665.2 million, its biggest daily inflow since Oct. 7 of last year. The combined bitcoin funds last drew more on Sept. 22, when they added $714.7 million.

The concentration of buying was notable. Fidelity's FBTC lost $83.6 million and Grayscale's GBTC shed $54.9 million over the same session, while the remaining funds recorded no net flows.

Despite Monday's gain, the broader month remains negative. The inflow more than erased last week's $228.5 million of withdrawals, but bitcoin funds are still about $90.5 million in the red for October, based on CoinDesk calculations using SoSoValue figures.

Ether ETFs moved in the opposite direction. The funds lost $103.3 million, marking their fourth consecutive session of outflows. BlackRock's ETHA accounted for $95.4 million of those withdrawals, according to SoSoValue.

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Sources

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AlphaMaven summarised this story from the reporting below. Each link opens the original article.

Coindesk Bitcoin ETFs just saw their biggest day in a month thanks entirely to BlackRock