f/overrides/event-backup/haitx-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
2020-12-29,0.337000
2017-12-27,0.349000
2018-12-27,0.307000
2019-12-27,0.336000
2021-12-10,1.248000
2023-12-27,0.507000
2025-12-29,0.348000
2015-12-29,0.077000
2018-12-17,1.230000
2021-12-29,0.386000
2022-12-12,1.116000
2023-12-11,0.914000
2025-12-11,6.124000
2015-12-11,0.426000
2016-12-16,0.193000
2019-12-10,0.616000
2022-12-28,0.506000
2024-12-11,4.430000
2024-12-27,0.400000
2016-12-28,0.208000
2017-12-15,0.755000