FBB U4 example ETF — daily forward tracking

NAV since entry

Only 2 trading days so far. The first point (as-of 2026-10-06) is NAV 1.0 before entry; on the entry day NAV is 0.999 because of the 10 bp entry cost.

Strategies on 2026-10-08

Narrow screen: swipe the table sideways to see the right-hand columns (Verification, Flags).

Data flags

"stale" = no close in the source on a KRX trading day; the previous close is kept. "check corporate action" = |daily return| above 30% (KRX limit); the day is provisional and the value is not altered.

No data flags (no stale prices, no |daily return| above 30%).

Revisions

Source data changed after it was used. The ledger was not rewritten; the numbers above use the closes as first recorded.

Restated with today's source closes (not the ledger)

Same weights and rules, priced with the closes in the source files today. The ledger above is unchanged (first-recorded closes). Basis: restated_current_source; file restated_ledger.csv.

Pre-entry revisions (signal closes)

The fixed weights were computed by the B14 run from the KRX price files as that run read them (known only by their sha256 hashes; the file contents were not kept). The closes in the universe file are the only recorded 2026-10-06 closes; the current source files differ from them for 19 of 21 stocks. Recomputed from today's files the weights would differ (max 1.5e-2, MVO); they are kept fixed by design (kept as recorded; this is reported, not corrected). Tracked NAVs use only the fixed weights and closes from the entry date on, so these differences do not change the NAVs.

Not checkable: dates before 2026-10-06 (estimation window): no recorded closes exist (the B14 run kept file hashes only, which changed when the files gained new rows), so they cannot be checked.