BlackRock’s IBIT drove $526.6 million Bitcoin ETF inflow

U.S. spot Bitcoin ETFs recorded $526.6 million in net inflows on Monday, Oct. 19, their largest daily total in nearly a month, as BlackRock’s iShares Bitcoin Trust (IBIT) brought in $665.2 million. The net figure was lower than IBIT’s total because withdrawals from other funds offset part of its intake. CoinDesk’s report, citing SoSoValue data, says Fidelity’s FBTC lost $83.6 million and Grayscale’s GBTC lost $54.9 million; the remaining funds recorded no net flows.

How large was the rebound against recent flows?

The $526.6 million net inflow was the strongest day for the group since Sept. 22, when U.S. spot Bitcoin ETFs drew $714.7 million, according to CoinDesk. IBIT’s $665.2 million intake was its biggest daily inflow since Oct. 7, 2025. The figures mark a sharp change from the prior week’s direction: the funds had recorded $228.5 million in withdrawals last week, more than erased by Monday’s net inflow.

That reversal did not put the month in positive territory. CoinDesk’s calculations using SoSoValue figures put October’s net ETF flows at about $90.5 million out after Monday’s session. One large day changed the running total substantially, but the month-to-date figure still showed more money leaving than entering the funds.

What does IBIT’s lead say about the rest of the ETF group?

Monday’s net result was concentrated in one product. IBIT took in more than the entire group’s net gain, while FBTC and GBTC together shed $138.5 million. With the other funds at zero net flow, the session did not show a broad-based inflow across competing Bitcoin ETFs. It showed a large addition to IBIT alongside redemptions from two alternatives.

That distinction matters when reading the headline total. A positive combined figure can describe demand for the group overall, but it does not mean each fund saw new money enter. On this day, the aggregate gain depended on IBIT’s intake being large enough to outweigh withdrawals elsewhere. The competing funds’ outflows do not explain why investors made those choices; the flow data records the difference between money entering and leaving each product.

Did other crypto funds move in the same direction?

No. Ether funds lost $103.3 million on Monday, their fourth consecutive session of outflows, with BlackRock’s ETHA accounting for $95.4 million of that total, according to SoSoValue data cited by CoinDesk. Bitcoin and ether ETF flows therefore diverged in the same session: the Bitcoin group ended net positive, while the Ether group extended its run of withdrawals.

The next useful signals are whether Bitcoin ETF inflows continue on subsequent sessions, whether gains spread beyond IBIT, and whether the group’s October balance turns positive. Ether flows also bear watching after four consecutive outflow days. Monday established a strong daily result for Bitcoin ETFs, but the concentration in one fund and the still-negative monthly total leave open whether it marks a wider change in demand.

Source material

• CoinDesk’s report, citing SoSoValue data — coindesk.com