f/overrides/event-backup/lcfvx-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
2019-06-28,0.061000
2020-12-18,2.938000
2023-06-29,0.073000
2021-12-29,0.036000
2016-03-31,0.070000
2016-12-30,0.058000
2017-12-29,0.049000
2018-12-27,0.065000
2019-09-27,0.051000
2021-06-29,0.039000
2021-09-29,0.034000
2022-06-29,0.047000
2024-03-27,0.048000
2025-09-23,0.073000
2017-09-29,0.046000
2018-09-28,0.043000
2020-03-27,0.036000
2021-12-17,2.866000
2022-12-20,0.087000
2023-12-27,0.081000
2015-09-30,0.060000
2018-03-29,0.051000
2019-12-27,0.047000
2024-09-25,0.071000
2026-06-26,0.063000
2015-12-18,0.176000
2017-03-31,0.062000
2017-06-30,0.063000
2021-03-30,0.025000
2022-12-28,0.086000
2024-06-27,0.073000
2024-12-27,0.136000
2016-09-30,0.067000
2018-06-29,0.043000
2019-12-18,1.033000
2020-12-29,0.050000
2023-03-30,0.072000
2023-09-28,0.039000
2025-12-30,0.131000
2025-06-24,0.062000
2016-06-30,0.069000
2017-12-15,0.117000
2018-12-18,0.702000
2019-03-29,0.070000
2020-06-30,0.035000
2020-09-29,0.043000
2025-03-27,0.055000
2015-12-31,0.051000
2016-12-16,0.169000
2022-03-30,0.044000
2022-09-29,0.070000
2026-03-27,0.046000