f/overrides/event-backup/fpei-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
2020-05-21,0.056000
2022-04-21,0.068000
2023-04-21,0.081000
2018-02-21,0.070000
2018-09-14,0.079000
2020-08-21,0.080000
2023-08-22,0.089000
2018-03-22,0.085000
2019-06-14,0.084000
2020-06-25,0.071000
2023-02-22,0.082000
2024-11-21,0.089000
2024-12-13,0.087000
2025-08-21,0.094000
2026-06-25,0.090000
2017-09-21,0.070000
2019-05-21,0.088000
2021-02-23,0.073000
2024-04-23,0.084000
2022-09-23,0.083000
2024-05-21,0.089000
2019-02-21,0.082000
2019-12-13,0.083000
2022-10-21,0.081000
2023-05-23,0.095000
2024-08-21,0.091000
2025-09-25,0.085000
2018-11-21,0.086000
2019-01-23,0.081000
2024-03-21,0.088000
2026-04-21,0.090000
2021-01-21,0.080000
2023-01-24,0.082000
2024-07-23,0.088000
2025-06-26,0.086000
2019-03-21,0.088000
2020-02-21,0.074000
2026-07-21,0.095000
2022-11-22,0.072000
2020-01-22,0.088000
2025-01-22,0.089000
2017-12-21,0.062000
2021-03-25,0.078000
2021-10-21,0.071000
2026-05-21,0.099000
2018-04-20,0.087000
2018-08-21,0.094000
2019-11-21,0.083000
2022-07-21,0.077000
2017-10-20,0.070000
2018-07-20,0.089000
2020-04-21,0.110000
2021-06-24,0.080000
2021-08-24,0.083000
2023-07-21,0.089000
2025-02-21,0.085000
2020-03-26,0.087000
2021-12-23,0.069000
2024-02-21,0.081000
2019-08-21,0.083000
2021-07-21,0.077000
2023-06-27,0.084000
2026-02-20,0.086000
2026-03-26,0.092000
2019-07-23,0.089000
2025-03-27,0.088000
2019-10-22,0.082000
2018-10-23,0.089000
2018-12-18,0.105000
2020-10-21,0.085000
2022-12-23,0.089000
2023-03-24,0.088000
2025-04-22,0.092000
2025-05-21,0.091000
2025-12-12,0.106000
2017-11-21,0.099000
2022-01-21,0.072000
2025-10-21,0.091000
2026-08-21,0.097000
2020-07-21,0.102000
2022-06-24,0.075000
2022-08-23,0.076000
2024-09-26,0.080000
2018-06-21,0.087000
2020-12-24,0.084000
2022-02-18,0.073000
2020-09-24,0.079000
2020-11-24,0.084000
2023-12-22,0.087000
2024-01-23,0.081000
2025-07-22,0.091000
2018-01-23,0.104000
2022-05-24,0.077000
2023-09-22,0.088000
2026-01-21,0.091000
2021-09-23,0.067000
2021-11-23,0.081000
2024-06-27,0.090000
2022-03-25,0.083000
2018-05-22,0.088000
2019-04-23,0.085000
2024-10-22,0.091000
2021-04-21,0.075000
2023-10-24,0.074000
2025-11-21,0.091000
2019-09-25,0.079000
2021-05-21,0.076000
2023-11-21,0.086000