f/overrides/event-backup/eaoa-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
2022-10-04,0.099000
2023-12-22,0.248000
2024-04-02,0.106000
2024-12-20,0.260000
2026-07-02,0.284000
2020-10-02,0.067000
2023-04-04,0.122000
2023-10-03,0.116000
2025-07-02,0.275000
2025-10-02,0.127000
2020-07-02,0.121000
2021-04-05,0.056000
2022-04-04,0.068000
2026-04-02,0.137000
2020-12-24,0.154000
2021-07-02,0.160000
2021-10-04,0.071000
2021-12-23,0.210000
2021-12-30,0.011000
2022-07-05,0.206000
2022-12-23,0.163000
2023-07-05,0.224000
2024-07-02,0.243000
2024-10-02,0.136000
2025-04-02,0.119000
2025-12-23,0.346000