f/overrides/event-backup/flia-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
2022-08-01,0.135000
2026-06-01,0.038000
2018-08-31,0.057000
2019-05-31,0.046000
2020-08-31,0.021000
2025-10-01,0.019000
2025-07-01,0.018000
2025-08-01,0.018000
2019-12-30,0.518000
2020-07-31,0.024000
2025-06-02,0.019000
2025-11-03,0.020000
2018-09-28,0.047000
2018-12-28,0.066000
2024-12-13,0.602000
2023-12-15,0.191000
2019-02-28,0.048000
2022-07-01,0.135000
2022-11-01,0.129000
2020-05-29,0.025000
2022-09-01,0.132000
2018-07-31,0.037000
2018-10-31,0.043000
2019-03-29,0.053000
2021-12-17,0.553000
2022-10-03,0.129000
2022-12-01,0.131000
2025-12-19,0.399000
2026-08-03,0.037000
2018-11-30,0.049000
2019-01-31,0.034000
2020-06-30,0.020000
2025-09-02,0.018000
2025-12-01,0.019000
2026-07-01,0.038000
2019-04-30,0.043000
2020-09-30,0.021000
2022-12-16,2.690000