f/overrides/event-backup/adgax-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
2008-12-22,0.040000
2015-12-17,1.283000
2021-12-09,3.709000
2004-12-21,0.245000
2017-12-14,2.221000
2014-12-18,2.845000
2017-06-12,0.017000
2019-12-12,1.138000
2020-12-10,0.927000
2022-12-08,1.921000
2023-12-07,0.968000
2024-12-12,2.366000
2005-12-16,0.922000
2025-12-11,3.656000
2007-12-21,3.213000
2016-12-15,0.867000
2018-12-13,2.974000
2006-12-14,1.638000