f/overrides/event-backup/deopx-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
2019-02-27,0.028000
2023-12-26,0.039000
2025-06-16,0.240000
2016-06-15,0.188000
2021-06-15,1.035000
2022-12-27,0.056000
2024-06-14,0.023000
2013-06-14,0.306000
2015-12-29,0.006000
2018-12-06,0.659000
2025-12-04,0.462000
2015-06-15,0.310000
2020-06-26,1.266000
2021-12-03,1.712000
2019-03-27,0.028000
2022-06-15,1.305000
2023-12-04,0.466000
2026-06-15,0.346000
2013-12-31,0.010000
2014-06-13,0.987000
2014-12-29,0.050000
2019-12-05,0.177000
2013-12-13,0.531000
2012-12-14,0.301000
2012-12-31,0.006000
2015-12-02,0.418000
2019-06-14,0.649000
2020-12-04,1.141000
2022-12-05,0.266000
2011-09-15,0.039000
2023-06-15,0.585000
2014-12-02,0.723000