f/overrides/event-backup/lroax-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
2014-03-31,0.027000
2025-06-30,0.136000
2011-11-30,0.017000
2012-04-30,0.020000
2025-08-29,0.042000
2012-02-29,0.022000
2013-08-30,0.023000
2024-06-28,0.150000
2025-03-31,0.229000
2013-09-30,0.021000
2013-10-31,0.025000
2018-06-28,0.126000
2024-09-30,0.190000
2011-08-31,0.021000
2012-07-31,0.028000
2012-10-31,0.033000
2017-03-31,0.028000
2018-12-20,0.041000
2025-12-31,0.044000
2011-09-30,0.017000
2013-03-28,0.016000
2013-12-31,0.024000
2014-01-31,0.023000
2014-09-30,0.120000
2012-01-31,0.020000
2026-04-30,0.042000
2026-06-30,0.042000
2011-10-31,0.016000
2013-01-31,0.029000
2015-09-30,0.054000
2015-12-22,0.359000
2020-12-18,0.025000
2022-12-20,0.121000
2024-12-20,0.182000
2026-02-27,0.037000
2026-07-31,0.044000
2011-12-09,0.057000
2012-08-31,0.024000
2012-12-31,0.033000
2013-02-28,0.021000
2015-06-30,0.055000
2021-06-30,0.039000
2021-12-20,0.033000
2023-03-31,0.077000
2026-03-31,0.044000
2012-12-12,0.268000
2017-12-21,0.257000
2018-03-28,0.099000
2011-12-30,0.021000
2013-11-29,0.024000
2014-12-23,0.197000
2023-12-19,0.125000
2025-07-31,0.005000
2012-09-28,0.024000
2012-11-30,0.034000
2021-03-31,0.043000
2024-03-28,0.156000
2012-05-31,0.022000
2013-06-28,0.016000
2014-02-28,0.023000
2017-06-30,0.041000
2017-09-29,0.063000
2023-06-30,0.107000
2012-06-29,0.024000
2015-03-31,0.057000
2018-09-27,0.091000
2021-09-30,0.113000
2025-11-28,0.042000
2013-05-31,0.022000
2023-09-29,0.040000
2025-09-30,0.042000
2026-05-29,0.043000
2012-03-30,0.022000
2013-04-30,0.020000
2013-07-31,0.020000
2014-12-10,0.338000
2020-03-31,0.046000
2025-10-31,0.043000
2026-01-30,0.043000