f/overrides/event-backup/apgax-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
1996-12-16,1.080000
1998-06-16,0.020000
2015-12-16,3.492000
2022-12-06,0.605000
2023-12-05,1.439000
2025-12-09,11.022000
1992-12-23,0.009000
2013-12-16,1.609000
2000-12-15,2.651000
2014-12-17,5.728000
2016-12-14,1.036000
2017-12-13,1.954000
2019-12-10,2.098000
2020-12-08,2.146000
2024-12-10,7.136000
1998-12-16,0.610000
1999-12-15,2.360000
2018-12-11,4.431000
2021-10-11,4.709000
2021-12-07,2.391000
1997-12-15,1.435000