f/overrides/event-backup/ezu-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
2021-12-13,0.600000
2023-12-20,0.351000
2008-12-23,0.538000
2025-12-16,0.610000
2002-12-23,0.225000
2003-12-22,0.395500
2017-12-19,0.191000
2018-12-18,0.192000
2019-12-16,0.170000
2020-06-15,0.318000
2020-12-14,0.623000
2024-06-11,1.043000
2001-08-24,0.334500
2011-06-22,0.858000
2026-06-15,1.231000
2014-12-17,0.262000
2021-06-10,0.484000
2021-12-30,0.121000
2022-12-13,0.175000
2008-06-25,1.816500
2010-12-21,0.284000
2009-06-23,0.747000
2012-12-18,0.108000
2012-12-27,0.014000
2013-12-18,0.126000
2015-06-25,0.688000
2016-12-21,0.223000
2006-12-20,0.926000
2007-12-20,1.480500
2019-06-17,1.021000
2025-06-16,1.218000
2012-06-21,0.790000
2014-06-25,0.817000
2000-12-20,0.003500
2003-12-16,0.056500
2013-06-27,0.796000
2016-06-22,0.841000
2022-06-09,0.928000
2023-06-07,0.862000
2024-12-17,0.326000
2009-12-22,0.297000
2011-12-20,0.308000
2010-06-23,0.637000
2015-12-21,0.077000
2017-06-20,0.638000
2018-06-19,1.026000
2004-12-23,0.649500
2005-12-23,0.660500