f/overrides/event-backup/laiax-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
2014-06-04,0.523000
2016-06-07,0.258000
2025-06-10,0.610000
2007-12-11,3.191000
2009-06-10,0.409000
2012-12-06,0.498000
2013-06-05,0.477000
2013-12-11,2.498000
2021-12-20,4.106000
2003-06-02,0.047000
2005-06-07,0.330000
2017-12-18,2.781000
2019-12-17,1.659000
2022-06-08,0.670000
2025-12-17,0.694000
2004-06-02,0.155000
2018-06-12,1.618000
2019-06-12,2.057000
2020-06-10,1.561000
2005-12-09,1.279000
2006-12-08,3.677000
2010-12-15,0.200000
2011-06-08,1.017000
2015-06-03,0.384000
2018-12-18,8.229000
2001-06-12,0.390000
2006-06-06,0.551000
2007-06-05,0.253000
2008-06-11,0.664000
2012-12-27,0.026000
2015-12-09,1.586000
2026-06-10,0.402000
2002-12-06,0.010000
2010-06-09,0.491000
2014-12-09,2.338000
2020-12-17,2.900000
2021-06-10,1.104000
2024-12-18,1.799000
2001-06-29,0.390000
2012-06-06,0.060000
2016-12-07,0.147000
2017-06-01,0.384000
2024-06-12,0.892000