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TL;DR: US spot Bitcoin ETFs attracted $524.8 million on October 21, according to Farside Investors. BlackRock and Fidelity supplied most of the inflow, extending a three-session run of net buying.
Bitcoin’s US exchange-traded funds recorded another half-billion-dollar session on Wednesday, with buying spread across more issuers than during the start of the week.
Farside Investors’ daily table puts October 21 net inflows at $524.8 million. BlackRock’s IBIT received $235 million and Fidelity’s FBTC added $212.7 million. Together, those two products accounted for approximately 85.3% of the total, calculated from the published figures.
A Broader Day Of Buying
Grayscale’s GBTC and Bitcoin Mini Trust, Bitwise’s BITB, Ark’s ARKB and Franklin’s EZBC also recorded positive flows. None of the funds in the table showed a net withdrawal for the session.
The latest result takes the October 19–21 total to $1.0747 billion. That calculation combines Monday’s $526.7 million, Tuesday’s $23.2 million and Wednesday’s $524.8 million.
For an ETF market often dominated by a single issuer, participation matters alongside the headline dollar amount. A large allocation to one product can reflect a particular client’s decision. Positive readings across several competing funds suggest that the day’s buying was less narrowly concentrated, even though the largest two still did most of the work.
Flows And Price Answer Different Questions
Net fund flows measure money entering or leaving the investment vehicles. They do not capture every Bitcoin trade, reveal each buyer’s holding period or establish that an investor has no offsetting position elsewhere.
That distinction limits what Wednesday’s number can tell traders about the next price move. Strong ETF demand can coexist with selling from other holders, and a daily creation figure is not a timetable for when every underlying coin was purchased.
The useful comparison is now whether the buying continues across multiple sessions and issuers. Wednesday improved both the size and breadth of reported demand. It still leaves the durability of that demand to subsequent trading days.
