f/overrides/event-backup/briux-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
2023-03-28,0.083000
2023-06-27,0.091000
2024-09-24,0.048000
2018-04-18,0.049000
2018-09-25,0.140000
2018-12-27,0.019000
2022-03-29,0.029000
2020-06-25,0.029000
2020-09-24,0.019000
2022-09-27,0.161000
2019-12-19,0.034000
2024-06-25,0.057000
2025-06-24,0.093000
2020-03-26,0.030000
2021-03-25,0.043000
2025-12-16,0.051000
2019-06-27,0.036000
2021-12-28,0.128000
2023-09-26,0.064000
2026-03-24,0.061000
2024-03-26,0.082000
2024-12-17,0.050000
2026-06-23,0.091000
2018-06-27,0.054000
2019-09-27,0.030000
2020-12-22,0.030000
2021-06-24,0.038000
2022-06-28,0.043000
2022-12-27,0.025000
2025-09-23,0.071000
2019-03-26,0.031000
2021-09-23,0.048000
2023-12-21,0.045000
2025-03-25,0.075000