f/overrides/event-backup/heq-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
2015-09-09,0.376000
2013-09-11,0.323000
2015-06-09,0.376000
2015-12-09,0.376000
2018-03-09,0.376000
2025-06-12,0.250000
2011-09-08,0.363000
2014-09-10,0.376000
2021-03-10,0.290000
2013-06-11,0.323000
2016-06-09,0.376000
2019-12-11,0.376000
2020-09-10,0.290000
2020-03-11,0.376000
2025-09-12,0.250000
2012-03-08,0.324000
2014-06-10,0.376000
2015-03-10,0.376000
2019-06-12,0.376000
2022-06-10,0.290000
2024-03-08,0.250000
2024-09-13,0.250000
2011-12-08,0.308000
2013-03-07,0.323000
2017-03-09,0.376000
2019-03-08,0.376000
2020-12-10,0.290000
2021-09-10,0.290000
2022-09-09,0.290000
2026-03-12,0.250000
2017-12-08,0.532000
2016-09-08,0.376000
2016-12-08,0.376000
2019-09-12,0.376000
2026-06-11,0.250000
2020-06-10,0.376000
2023-12-08,0.250000
2025-03-13,0.250000
2012-09-12,0.323000
2016-03-09,0.376000
2017-09-08,0.376000
2021-06-10,0.290000
2021-12-10,0.290000
2022-12-09,0.290000
2018-12-12,0.376000
2012-12-11,0.323000
2014-03-11,0.376000
2023-03-10,0.290000
2024-12-12,0.250000
2025-12-11,0.250000
2013-12-10,0.376000
2023-06-09,0.290000
2024-06-13,0.250000
2012-06-07,0.334000
2017-06-08,0.376000
2018-06-08,0.376000
2022-03-10,0.290000
2014-12-09,0.376000
2018-09-13,0.376000
2023-09-08,0.250000