f/overrides/event-backup/lpdkx-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
2023-12-22,0.220000
2018-03-29,0.041000
2020-03-31,0.035000
2020-06-30,0.096000
2019-03-28,0.013000
2019-12-31,0.233000
2022-07-14,0.090000
2024-06-28,0.066000
2017-06-30,0.020000
2018-06-29,0.147000
2018-09-28,0.044000
2017-09-29,0.033000
2017-12-29,0.105000
2021-09-30,0.013000
2023-09-29,0.060000
2024-12-24,0.935000
2021-03-31,0.056000
2021-06-30,0.054000
2021-12-31,1.159000
2023-03-31,0.039000
2025-12-29,0.584000
2018-12-31,0.540000
2019-09-27,0.036000
2020-09-30,0.055000
2026-07-22,0.091000
2023-06-30,0.079000
2025-07-17,0.040000
2020-12-31,0.056000
2022-03-31,0.111000
2022-06-30,0.047000
2019-06-28,0.065000