f/overrides/event-backup/averx-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
1990-01-18,0.300000
1996-12-31,2.062000
1999-12-31,1.233000
2013-12-30,0.525000
2014-12-30,2.138000
2015-12-30,0.230000
1993-01-25,0.020000
2017-12-28,2.021000
2024-12-30,7.915000
1987-01-09,0.100000
1989-01-12,0.140000
1997-12-31,3.141000
2005-12-29,2.664000
2012-12-28,0.230000
2020-12-30,0.747000
1984-12-14,0.040000
1991-01-25,0.100000
1992-01-24,0.170000
2006-12-28,3.571000
2011-12-29,0.067000
2000-12-29,0.949000
2004-12-29,4.614000
2010-12-30,0.107000
2018-12-28,0.663000
1985-12-13,0.080000
2003-12-31,2.295000
2021-12-30,2.522000
2022-12-29,0.394000
2001-12-31,2.672000
2010-04-30,0.014000
2023-12-28,1.876000
2007-12-28,0.546000
2008-12-30,0.068000
2025-12-30,0.228000