f/overrides/event-backup/jfqux-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
2022-09-30,0.072000
2025-06-30,0.107000
2025-09-30,0.107000
2018-03-29,0.053000
2019-09-30,0.071000
2020-03-31,0.064000
2020-09-30,0.062000
2021-12-31,0.322000
2025-12-15,0.513000
2023-12-29,0.163000
2024-03-28,0.087000
2025-03-31,0.095000
2018-09-28,0.064000
2020-12-31,0.157000
2022-12-30,0.134000
2023-03-31,0.077000
2023-09-29,0.090000
2026-03-31,0.100000
2026-06-30,0.106000
2022-03-31,0.050000
2024-12-31,0.256000
2019-03-29,0.058000
2019-06-28,0.069000
2020-12-15,0.687000
2021-09-30,0.056000
2021-12-15,0.307000
2017-12-29,0.187000
2018-06-29,0.060000
2023-12-15,0.160000
2024-06-28,0.100000
2025-12-31,0.237000
2017-12-15,0.740000
2018-12-31,0.242000
2019-12-31,0.146000
2020-06-30,0.060000
2022-12-15,0.686000
2017-09-29,0.058000
2021-03-31,0.051000
2024-09-30,0.107000
2019-12-16,0.695000
2021-06-30,0.055000
2022-06-30,0.067000
2018-12-14,0.682000
2023-06-30,0.082000
2024-12-16,0.434000