Outflows from Fidelity and Grayscale reduced the market total
IBIT’s $665.16 million net inflow was larger than the $526.6 million net inflow for all 12 US spot bitcoin ETFs. Fidelity’s FBTC lost $83.63 million and Grayscale’s GBTC lost $54.93 million.

The remaining funds recorded no net flows. The two withdrawals explain the $138.56 million difference between IBIT’s result and the total for the whole group.
The group recorded its strongest day since 22 September
The $526.6 million group inflow reversed an $82.39 million outflow on 16 October. It was the strongest daily result for US spot bitcoin ETFs in nearly a month.
Trading volume across the funds reached $2.09 billion. IBIT accounted for $1.76 billion of that amount, compared with $135.9 million for FBTC and $83 million for GBTC.
| Metric | Value |
|---|---|
| IBIT net inflow | $665.16 million |
| All US spot bitcoin ETFs | $526.6 million net inflow |
| Fidelity FBTC | $83.63 million net outflow |
| Grayscale GBTC | $54.93 million net outflow |
| Date | 19 October 2026 |
| Previous larger IBIT day | 7 October 2025 |
IBIT did not set an all-time record
The 19 October figure was IBIT’s largest one-day inflow since 7 October 2025, not the largest result in the fund’s full history. The date gives the number a clear comparison without turning it into an absolute record.
The 12 funds had cumulative net inflows of $57.40 billion and total net assets of $105.46 billion after the session, according to SoSoValue data cited in the report.

The figure describes fund flows, not a price forecast
IBIT is a bitcoin exchange-traded fund, not a BlackRock share or a market index. The $665.16 million figure measures net money entering that product during one trading day.
A strong inflow shows demand for the fund, but it does not guarantee a bitcoin price increase. Spot trading, derivatives, liquidity and wider market news can still move the price in either direction.
This article is for information only and is not investment advice.




