f/overrides/event-backup/lceax-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
2006-06-20,0.041000
2007-06-20,0.047000
2008-06-18,0.065000
2008-09-18,0.056000
2014-09-18,0.067000
2015-12-11,0.837000
2018-03-22,0.084000
2019-12-13,0.694000
2021-12-14,3.323000
2009-12-11,0.048000
2013-12-13,0.223000
2016-12-13,0.582000
2023-06-22,0.086000
2023-12-13,1.131000
2024-03-28,0.078000
2003-12-12,0.039000
2007-12-14,0.993000
2010-09-16,0.046000
2020-12-11,0.410000
2003-09-19,0.019000
2008-03-18,0.065000
2008-12-12,0.059000
2011-03-17,0.050000
2011-09-15,0.045000
2016-06-16,0.066000
2010-03-18,0.050000
2004-12-17,0.267000
2014-03-20,0.062000
2017-09-14,0.084000
2018-12-14,1.057000
2019-03-21,0.116000
2021-09-23,0.107000
2024-12-12,1.916000
2026-03-26,0.063000
2004-06-18,0.036000
2022-09-22,0.093000
2003-06-20,0.019000
2010-06-17,0.050000
2012-12-07,0.282000
2014-06-19,0.062000
2015-06-18,0.066000
2018-09-13,0.106000
2021-06-24,0.107000
2025-06-26,0.063000
2013-03-21,0.058000
2017-03-16,0.071000
2020-06-18,0.116000
2022-06-23,0.093000
2012-06-14,0.059000
2013-09-19,0.062000
2014-12-12,0.448000
2019-09-19,0.116000
2021-03-25,0.108000
2007-03-20,0.055000
2009-06-19,0.047000
2009-09-18,0.037000
2010-12-03,0.090000
2016-09-15,0.072000
2023-03-23,0.086000
2026-06-25,0.062000
2005-12-16,0.200000
2009-03-20,0.053000
2012-03-15,0.049000
2019-06-20,0.117000
2025-09-25,0.063000
2025-12-11,2.105000
2005-09-19,0.040000
2012-09-20,0.059000
2017-06-15,0.073000
2018-06-21,0.106000
2022-12-14,1.865000
2004-03-19,0.072000
2006-12-15,0.650000
2007-09-20,0.050000
2011-06-16,0.050000
2015-09-17,0.067000
2016-03-17,0.066000
2017-12-13,0.286000
2020-09-17,0.109000
2024-09-26,0.073000
2013-06-20,0.062000
2020-03-19,0.116000
2022-03-24,0.093000
2004-09-20,0.036000
2005-03-18,0.040000
2005-06-20,0.040000
2006-03-20,0.040000
2006-09-20,0.053000
2011-12-09,0.197000
2015-03-19,0.066000
2023-09-28,0.085000
2024-06-27,0.074000
2025-03-27,0.063000