f/overrides/event-backup/hcrb-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
2021-05-27,0.037000
2022-03-30,0.051000
2022-07-28,0.062000
2023-03-30,0.094000
2024-09-27,0.104000
2021-09-29,0.039000
2022-05-27,0.053000
2022-08-30,0.081000
2025-05-29,0.117000
2022-06-29,0.060000
2023-10-27,0.097000
2020-07-30,0.038000
2023-01-27,0.068000
2024-03-27,0.099000
2021-10-28,0.039000
2021-12-17,0.145000
2022-12-29,0.086000
2024-08-29,0.111000
2025-03-28,0.104000
2026-06-29,0.119000
2020-05-28,0.053000
2021-12-30,0.042000
2023-08-30,0.107000
2023-11-28,0.111000
2024-07-30,0.121000
2024-02-27,0.096000
2025-08-28,0.113000
2026-04-29,0.116000
2020-03-30,0.072000
2020-04-29,0.056000
2020-08-28,0.038000
2022-01-28,0.039000
2023-02-27,0.076000
2021-08-30,0.040000
2024-01-29,0.113000
2024-04-26,0.108000
2025-02-27,0.111000
2026-02-27,0.113000
2020-11-27,0.042000
2022-02-25,0.041000
2023-04-27,0.083000
2024-05-30,0.125000
2025-06-27,0.110000
2025-04-29,0.135000
2025-07-30,0.125000
2022-04-28,0.048000
2022-10-27,0.069000
2022-11-29,0.083000
2024-06-27,0.107000
2024-10-30,0.112000
2020-10-29,0.039000
2021-06-29,0.043000
2021-07-29,0.028000
2025-11-26,0.107000
2021-04-29,0.037000
2022-09-29,0.068000
2023-05-26,0.084000
2023-06-29,0.109000
2021-02-25,0.033000
2023-09-28,0.097000
2023-12-28,0.172000
2025-12-30,0.181000
2026-01-30,0.110000
2026-07-30,0.126000
2021-01-28,0.030000
2021-11-29,0.043000
2024-12-31,0.229000
2025-01-30,0.111000
2025-10-30,0.122000
2025-09-29,0.126000
2026-03-30,0.124000
2026-05-28,0.116000
2020-09-29,0.039000
2020-12-30,0.369000
2021-03-30,0.042000
2023-07-28,0.093000
2024-11-27,0.106000
2020-06-29,0.016000