f/overrides/event-backup/gagax-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
2002-09-26,0.080000
2012-09-26,0.020000
2008-12-29,0.750000
2009-03-27,0.875000
2012-12-27,0.010000
2018-12-27,0.395000
2020-12-29,0.197000
2022-12-28,1.034000
2004-04-28,2.500000
2007-09-26,0.750000
2023-12-27,0.721000
2005-04-27,2.500000
2003-04-28,2.500000
2005-01-27,2.500000
2003-10-29,2.500000
2004-09-28,2.500000
2005-09-28,0.750000
2011-12-28,0.205000
2003-01-29,2.500000
2003-03-27,2.500000
2004-05-26,2.500000
2004-06-28,2.500000
2005-02-24,2.500000
2007-06-27,0.750000
2016-12-28,0.218000
2002-12-27,0.080000
2003-09-26,2.500000
2007-12-27,2.525000
2009-06-26,1.130000
2004-08-27,2.500000
2004-11-26,2.500000
2005-06-28,0.750000
2010-09-28,0.060000
2002-04-26,0.080000
2003-02-26,2.500000
2011-06-28,0.150000
2012-03-28,0.100000
2015-12-29,0.292000
2019-12-27,0.116000
2004-02-25,2.500000
2004-12-29,2.500000
2002-10-29,0.080000
2003-12-29,2.500000
2006-06-28,0.750000
2007-03-28,0.750000
2008-06-26,0.750000
2010-12-29,0.220000
2002-05-29,0.080000
2002-08-28,0.080000
2014-12-29,0.367000
2021-12-29,0.544000
2003-08-27,2.500000
2004-07-28,2.500000
2009-09-28,0.905000
2009-12-29,0.335000
2024-12-27,0.930000
2002-07-29,0.080000
2002-11-26,0.080000
2003-07-29,2.500000
2004-10-27,2.500000
2010-03-29,0.085000
2010-06-28,0.125000
2002-01-29,0.080000
2003-06-26,2.500000
2004-03-29,2.500000
2006-09-27,0.750000
2011-03-29,0.095000
2012-06-27,0.060000
2017-12-27,0.385000
2002-02-26,0.080000
2002-06-26,0.080000
2005-03-29,2.500000
2011-09-28,0.140000
2013-12-23,0.083000
2025-12-29,1.020000
2003-05-28,2.500000
2003-11-25,2.500000
2006-03-29,0.750000
2006-12-27,0.325000
2008-03-27,0.750000
2008-09-26,0.750000
2002-03-26,0.080000
2004-01-28,2.500000