f/overrides/event-backup/gtlix-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
2016-12-14,0.077000
2018-07-05,0.090000
2022-07-06,0.083000
2022-12-15,4.723000
2026-07-01,0.027000
2016-07-06,0.075000
2017-12-13,1.251000
2018-10-03,0.086000
2018-12-14,2.298000
2021-10-06,0.072000
2024-10-02,0.066000
2024-12-16,5.136000
2020-07-01,0.081000
2023-10-04,0.055000
2024-04-03,0.063000
2025-10-01,0.042000
2026-04-01,0.042000
2016-10-05,0.083000
2019-07-03,0.089000
2020-10-07,0.083000
2022-10-05,0.088000
2023-04-05,0.071000
2025-07-02,0.043000
2016-04-06,0.066000
2018-04-04,0.068000
2019-10-02,0.102000
2020-12-15,2.249000
2022-04-06,0.067000
2023-07-05,0.065000
2017-07-05,0.073000
2017-10-04,0.069000
2021-04-07,0.065000
2021-12-14,3.885000
2023-12-15,1.718000
2025-04-02,0.037000
2025-12-15,3.443000
2017-04-05,0.063000
2019-04-03,0.083000
2019-12-13,1.256000
2020-04-01,0.089000
2021-07-07,0.070000
2024-07-03,0.064000