BlackRock's IBIT Attracts $665M in Single-Day Inflows, Bitcoin ETFs Post Largest Daily Inflow in Recent Months
nashnova research
BlackRock's IBIT drew a single-day net inflow of $665.2 million, driving U.S. spot bitcoin ETFs to their biggest daily haul in a month; meanwhile, ethereum ETFs bled out for a fourth straight session, highlighting a sharp divergence in crypto capital flows.
$665 million in one day — where did it all go?
U.S. spot bitcoin ETFs posted a combined net inflow of $526.6 million on October 20. Nearly all of it came from BlackRock's IBIT, which alone pulled in $665.2 million — its largest single-day haul since October 7 last year.
This means → the rest of the bitcoin ETF field didn't just sit idle — it actively dragged the total down. IBIT single-handedly covered the headline number and offset outflows elsewhere.
The last time bitcoin ETFs saw a higher combined daily inflow was September 22, at $714.7 million.
What were the other funds doing?
Fidelity's FBTC shed $83.6 million on the day. Grayscale's GBTC lost $54.9 million. Every other bitcoin ETF reported zero net flow.
In plain terms = this wasn't "investors buying bitcoin ETFs." It was "investors buying one BlackRock product while ignoring — or exiting — everyone else."
This reflects an increasingly self-reinforcing loop: IBIT's brand trust and liquidity advantage concentrate more capital, which deepens its liquidity, which attracts more capital.
Zooming out to October — is money really coming back?
Monday's inflow more than reversed last week's total net outflow of $526.5 million — on the surface, a trend reversal.
But per CoinDesk's calculation from SoSoValue data, bitcoin ETFs have still posted a cumulative net outflow of roughly $90.5 million since October began.
This means → one blockbuster day does not equal a trend change. On a monthly basis, capital is still flowing out. It is too early to call a turning point.
Why are ethereum ETFs bleeding?
Ethereum ETFs lost a combined $103.3 million the same day — their fourth consecutive session of net outflows.
BlackRock's own ETHA accounted for $95.4 million of that, the vast majority of the ethereum outflow.
In plain terms = same asset manager, opposite directions. BlackRock's bitcoin product is absorbing capital; its ethereum product is losing it. Investors aren't leaving crypto — they're choosing within it, and right now the choice is bitcoin.
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