f/overrides/event-backup/jftux-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
2021-03-31,0.030000
2019-09-30,0.038000
2019-12-31,0.204000
2020-09-30,0.040000
2020-12-15,1.334000
2022-09-30,0.052000
2022-12-30,0.209000
2023-06-30,0.053000
2018-09-28,0.034000
2026-06-30,0.061000
2018-03-29,0.024000
2019-06-28,0.037000
2023-03-31,0.049000
2023-12-29,0.241000
2024-03-28,0.050000
2025-12-15,0.464000
2017-09-29,0.029000
2024-06-28,0.059000
2025-09-30,0.067000
2022-03-31,0.030000
2019-12-16,1.393000
2020-06-30,0.039000
2022-12-15,1.402000
2023-12-15,0.442000
2024-12-16,0.219000
2025-12-31,0.455000
2018-06-29,0.027000
2023-09-29,0.063000
2024-09-30,0.066000
2026-03-31,0.056000
2017-12-29,0.366000
2018-12-31,0.441000
2019-03-29,0.029000
2020-03-31,0.035000
2021-09-30,0.038000
2021-12-15,0.468000
2022-06-30,0.052000
2024-12-31,0.529000
2017-12-15,1.436000
2020-12-31,0.219000
2021-06-30,0.033000
2021-12-31,0.670000
2025-03-31,0.053000
2025-06-30,0.066000
2018-12-14,1.009000