f/overrides/event-backup/lacfx-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
2017-06-30,0.059000
2023-06-29,0.066000
2005-03-24,0.054000
2007-12-21,0.325000
2009-12-30,0.116000
2023-12-27,0.075000
2024-03-27,0.042000
2005-09-22,0.053000
2007-09-28,0.058000
2009-12-23,0.055000
2013-06-28,0.040000
2021-12-17,2.866000
2009-09-30,0.094000
2004-09-23,0.055000
2014-03-28,0.042000
2020-06-30,0.029000
2005-06-29,0.046000
2008-09-30,0.080000
2010-06-30,0.094000
2019-12-27,0.041000
2003-12-19,0.106000
2010-09-30,0.087000
2013-09-27,0.033000
2006-12-21,0.512000
2015-09-30,0.054000
2015-12-18,0.176000
2019-06-28,0.054000
2019-12-18,1.033000
2025-12-30,0.122000
2022-12-28,0.080000
2025-06-24,0.055000
2010-12-17,0.153000
2012-12-28,0.063000
2016-06-30,0.063000
2004-06-24,0.053000
2009-03-31,0.084000
2023-03-30,0.065000
2024-06-27,0.066000
2020-12-29,0.042000
2025-03-27,0.048000
2005-12-20,0.095000
2008-12-30,0.070000
2011-03-31,0.090000
2007-03-30,0.068000
2012-03-30,0.063000
2013-12-18,1.037000
2014-12-22,1.476000
2015-03-31,0.033000
2006-03-29,0.047000
2011-12-30,0.059000
2021-06-29,0.029000
2022-06-29,0.039000
2013-12-31,0.040000
2015-12-31,0.045000
2020-03-27,0.029000
2011-06-30,0.067000
2023-09-28,0.033000
2010-03-31,0.123000
2024-12-27,0.129000
2004-12-21,0.193000
2008-03-28,0.070000
2011-12-16,0.054000
2012-12-18,0.081000
2018-12-18,0.702000
2021-09-29,0.024000
2017-09-29,0.039000
2017-12-29,0.042000
2007-12-27,0.079000
2017-12-15,0.117000
2003-09-24,0.016000
2012-06-29,0.057000
2024-09-25,0.064000
2021-03-30,0.016000
2022-09-29,0.063000
2025-09-23,0.065000
2021-12-29,0.027000
2006-06-28,0.041000
2006-09-27,0.052000
2016-12-16,0.169000
2020-12-18,2.938000
2004-03-24,0.051000
2014-12-31,0.037000
2015-06-30,0.041000
2018-12-27,0.059000
2022-03-30,0.036000
2018-06-29,0.036000
2016-03-31,0.065000
2017-03-31,0.055000
2018-03-29,0.045000
2019-03-29,0.063000
2012-09-28,0.058000
2014-06-27,0.034000
2019-09-27,0.044000
2020-09-29,0.035000
2022-12-20,0.087000
2011-09-30,0.061000
2026-06-26,0.054000
2008-06-27,0.070000
2013-03-28,0.056000
2014-09-30,0.046000
2018-09-28,0.036000
2007-06-29,0.056000
2009-06-30,0.083000
2008-12-23,0.155000
2016-09-30,0.061000
2016-12-30,0.052000
2026-03-27,0.037000