f/overrides/event-backup/flv-dividend.csv
Greg Pomerantz bb8e39605e Event-history protection: backup dir, empty-download fallback, docs
Yahoo's 2026 event-feed change (capitalGain events dropped for some
funds; no events at all for terminated tickers) can wipe good event
history on re-download. Defense in depth:

- overrides/event-backup/: last-known-good copy of every dividend/
  capitalGain file (8,192 files, 58 MB); refresh with
  scripts/backup_events.py after each dump update
- data.py event_file(): frozen > data-root (while populated) > backup;
  used by panel reads, verify_official, and the double-listing scanner
- README: capital-gain files are mutual-fund-only in this dump; Yahoo
  has no LT/ST split (tax.py taxes capg at lt_rate; the per-fund split
  would come from fund-company annual tax statements or commercial feeds)
- tests: exact Timestamp .loc keys (pandas 3.x string matching returns a
  Series on large DatetimeIndex)
2026-08-31 21:59:25 -04:00

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Date,Dividends
2022-03-22,0.330000
2022-06-21,0.290000
2023-03-23,0.323000
2023-09-21,0.340000
2024-06-24,0.356000
2024-09-23,0.213000
2024-12-17,0.425000
2020-09-22,0.226000
2026-03-10,0.207000
2025-03-25,0.312000
2021-09-21,0.304000
2022-09-20,0.338000
2023-06-20,0.303000
2025-09-23,0.218000
2025-12-16,0.464000
2020-06-23,0.055000
2021-03-23,0.258000
2021-06-22,0.274000
2021-12-16,1.645000
2023-12-18,0.298000
2026-06-09,0.406000
2020-12-17,0.191000
2024-03-21,0.386000
2025-06-24,0.446000
2022-12-15,1.973000