f/overrides/event-backup/kng-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
2018-09-26,0.464000
2023-08-22,0.555000
2024-02-21,0.374000
2024-07-23,0.376000
2024-08-21,0.380000
2025-08-21,0.356000
2018-06-27,0.405000
2019-06-19,0.466000
2020-06-24,0.427000
2024-04-23,0.374000
2024-05-21,0.383000
2025-03-27,0.363000
2021-09-23,0.491000
2023-03-24,0.510000
2023-11-21,0.365000
2026-02-20,0.370000
2026-04-21,0.348000
2024-11-21,0.382000
2026-01-21,0.362000
2024-09-26,0.391000
2025-07-22,0.355000
2020-09-23,0.441000
2025-11-21,0.344000
2026-08-21,0.362000
2022-03-25,0.516000
2025-06-26,0.350000
2021-12-23,0.506000
2023-06-27,0.507000
2026-05-21,0.340000
2019-03-20,0.462000
2022-12-23,0.529000
2023-09-22,0.381000
2023-12-22,0.380000
2025-02-21,0.362000
2026-06-25,0.347000
2019-09-25,0.476000
2022-06-24,0.500000
2024-10-22,0.393000
2025-04-22,0.346000
2025-12-12,0.344000
2025-10-21,0.344000
2021-03-25,0.480000
2023-10-24,0.358000
2024-03-21,0.382000
2024-06-27,0.373000
2025-01-22,0.363000
2025-09-25,0.348000
2020-12-29,0.462000
2022-09-23,0.502000
2024-12-13,0.378000
2026-07-21,0.360000
2019-12-27,0.490000
2024-01-23,0.373000
2025-05-21,0.360000
2026-03-26,0.345000
2020-03-25,0.394000
2021-06-24,0.497000
2018-12-27,0.451000