f/overrides/event-backup/bdokx-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
2025-03-31,0.090000
2015-03-31,0.051000
2022-12-13,0.013000
2012-09-28,0.050000
2014-09-30,0.057000
2021-06-30,0.082000
2021-09-30,0.084000
2022-01-03,0.008000
2023-09-29,0.064000
2013-12-31,0.048000
2017-09-29,0.060000
2014-12-31,0.726000
2014-06-30,0.300000
2017-03-31,0.052000
2018-03-29,0.053000
2020-12-10,0.029000
2024-12-12,0.032000
2025-06-30,0.106000
2012-03-30,0.052000
2012-06-29,0.077000
2023-03-31,0.083000
2023-12-14,0.052000
2026-06-30,0.110000
2015-12-30,0.104000
2016-09-30,0.052000
2025-12-16,0.123000
2016-03-31,0.048000
2018-06-29,0.103000
2024-06-28,0.113000
2025-09-30,0.073000
2016-12-16,0.090000
2019-03-28,0.059000
2014-03-31,0.105000
2016-06-30,0.089000
2022-06-30,0.098000
2012-12-31,0.227000
2013-06-28,0.096000
2018-12-14,0.052000
2019-06-28,0.101000
2022-03-31,0.061000
2024-09-30,0.071000
2019-09-27,0.065000
2020-06-30,0.053000
2015-09-30,0.013000
2021-03-31,0.075000
2021-12-09,0.087000
2024-03-28,0.071000
2015-06-30,0.136000
2019-12-12,0.067000
2022-09-30,0.071000
2023-06-30,0.091000
2026-03-31,0.070000
2011-09-30,0.064000
2013-03-28,0.048000
2018-09-28,0.061000
2020-03-31,0.061000
2020-09-30,0.064000
2013-09-30,0.050000
2017-06-30,0.089000