f/overrides/event-backup/fdblx-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
2026-06-24,0.030000
2023-12-26,0.027000
2024-12-24,0.027000
2025-03-24,0.027000
2025-05-27,0.028000
2025-10-24,0.028000
2026-01-26,0.027000
2024-10-24,0.027000
2024-11-25,0.027000
2026-07-24,0.031000
2023-11-24,0.026000
2024-05-24,0.026000
2024-09-24,0.026000
2025-09-24,0.028000
2024-02-26,0.027000
2024-03-25,0.026000
2024-06-24,0.026000
2025-12-24,0.029000
2024-01-24,0.026000
2024-07-24,0.027000
2025-01-24,0.027000
2026-02-24,0.027000
2026-05-26,0.029000
2024-04-24,0.026000
2024-08-26,0.027000
2025-04-24,0.028000
2025-06-24,0.028000
2025-07-24,0.028000
2026-04-24,0.028000
2025-02-24,0.026000
2025-08-25,0.028000
2025-11-24,0.030000
2026-03-24,0.028000