f/overrides/event-backup/fins-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
2020-10-15,0.101000
2021-01-14,0.109000
2022-03-16,0.109000
2022-10-14,0.095000
2023-02-13,0.095000
2023-07-14,0.095000
2019-07-11,0.117000
2020-07-16,0.101000
2024-05-16,0.109000
2024-01-16,0.109000
2024-12-17,0.109000
2026-01-16,0.115000
2021-02-11,0.109000
2023-01-13,0.095000
2025-09-16,0.115000
2023-06-15,0.095000
2024-02-14,0.109000
2023-04-13,0.095000
2023-11-15,0.109000
2025-03-04,0.109000
2025-10-17,0.115000
2026-04-16,0.115000
2022-08-16,0.109000
2022-12-15,0.095000
2021-06-15,0.109000
2025-06-16,0.109000
2026-03-17,0.115000
2019-11-14,0.118000
2020-04-15,0.101000
2023-05-16,0.095000
2024-04-15,0.109000
2025-08-15,0.115000
2026-07-17,0.115000
2020-02-13,0.111000
2022-11-15,0.095000
2022-02-11,0.109000
2022-05-16,0.109000
2025-04-16,0.109000
2025-05-02,0.109000
2020-05-14,0.101000
2021-03-16,0.109000
2021-11-15,0.109000
2023-08-16,0.095000
2024-08-16,0.109000
2020-12-15,0.109000
2021-08-16,0.109000
2020-08-14,0.101000
2022-04-13,0.109000
2022-07-14,0.109000
2023-03-16,0.095000
2023-09-14,0.109000
2023-12-14,0.109000
2019-09-13,0.118000
2020-03-16,0.112000
2024-10-17,0.109000
2024-11-15,0.109000
2025-07-17,0.109000
2020-01-16,0.110000
2021-10-04,0.109000
2022-09-15,0.095000
2019-12-16,0.118000
2020-06-15,0.101000
2024-09-16,0.109000
2025-01-17,0.109000
2025-12-17,0.115000
2019-08-15,0.117000
2019-10-16,0.118000
2025-02-14,0.109000
2021-04-15,0.109000
2022-06-15,0.109000
2023-10-16,0.109000
2026-02-13,0.115000
2020-11-13,0.101000
2021-05-13,0.109000
2026-05-15,0.115000
2026-06-16,0.115000
2026-08-17,0.115000
2020-09-15,0.101000
2021-12-16,0.109000
2022-01-13,0.109000
2024-03-13,0.109000
2024-06-14,0.109000
2024-07-17,0.109000
2025-11-14,0.115000
2021-07-15,0.109000
2021-09-15,0.109000