f/overrides/event-backup/lacax-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
2004-12-10,0.881000
2006-06-06,0.313000
2008-12-09,0.107000
2010-06-09,0.020000
2014-06-04,0.771000
2018-06-12,0.652000
2018-12-11,1.110000
2011-06-08,0.320000
2012-06-06,0.357000
2015-06-03,1.641000
2016-12-07,3.923000
2017-12-05,3.071000
2001-06-12,0.280000
2001-12-07,0.070000
2008-06-11,0.553000
2013-12-11,1.940000
2015-12-09,10.637000
2019-12-12,1.012000
2010-12-15,0.837000
2011-12-07,0.890000
2012-12-06,1.524000
2017-06-01,0.565000
2021-06-10,0.672000
2022-06-08,0.475000
2026-06-10,0.136000
2000-11-17,0.060000
2003-12-05,0.020000
2004-06-02,0.028000
2005-12-09,1.247000
2006-12-08,2.113000
2010-04-01,0.031000
2014-12-09,4.838000
2007-12-11,1.939000
2016-06-07,2.054000
2020-06-10,0.703000
2020-12-10,1.502000
2013-06-05,0.425000
2019-06-12,0.668000
2021-12-14,2.974000
2005-06-07,0.386000
2007-06-05,0.387000