Learn / Guide · Published October 20, 2026
Bitcoin ETF flows: why a missing fund value is not zero
By Sahil Kaila · Alphabit founder and risk-model builder. About the author
A historical Farside example shows how a preliminary partial flow total changed after a missing fund value was reported.
When an ETF-flow table shows a dash for one fund, treat that value as unknown—not as a confirmed zero. A subtotal can still add the values that are present, but it should not be mistaken for a complete daily total.
A real example of a partial total changing
On October 3, 2026, Farside’s table showed a dash for IBIT in its October 2 row, while FBTC showed +$29.3 million and MSBT showed +$2.4 million. The displayed subtotal was +$31.7 million. That was the sum of known entries in the table snapshot, not a statement that all funds had finished reporting.
When checked again on October 20, the same October 2 row was complete: IBIT showed +$158.2 million and the table total was +$189.9 million. The row’s published total therefore changed as the missing entry became available. The earlier subtotal was not “wrong arithmetic”; it was incomplete coverage.
| Snapshot checked | IBIT | FBTC | MSBT | Displayed total |
|---|---|---|---|---|
| October 3 | — | +29.3 | +2.4 | +31.7 |
| October 20 | +158.2 | +29.3 | +2.4 | +189.9 |
The source dates above are table-check dates; the underlying market session was October 2. The initial access time on October 3 was not recorded, so no more precise timestamp is claimed. Farside notes that its table is generated automatically and may contain inaccuracies.
How partial data can change the story
Imagine three funds report +$40 million, −$10 million and zero, while a fourth has no value yet. The known subtotal is +$30 million. If the fourth later reports −$50 million, the complete total becomes −$20 million. If it reports +$50 million, the total becomes +$80 million. The subtotal was useful, but it could not determine the final direction.
A quick checklist for ETF-flow headlines
- Record the U.S. trading-session date separately from when you viewed the data.
- Count how many fund values are numeric and how many are missing.
- Label an interim sum as a partial subtotal.
- Recheck whether the source later filled or revised the row.
- Align the flow session with any price or model observation before comparing them.
A complete flow row provides context, but it does not identify investor motives or prove what caused a Bitcoin price move. For the five-session ETF data breakdown, read the October 5–9, 2026 flow analysis.
Source: Farside Investors Bitcoin ETF flow table, snapshots checked October 3 and October 20, 2026. The October 2 row now displays +$158.2m for IBIT and +$189.9m total; the initial October 3 subtotal was +$31.7m with IBIT shown as a dash.