f/overrides/event-backup/iwd-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
2002-03-08,0.197000
2020-06-15,0.696000
2017-07-06,0.717000
2003-03-07,0.226000
2004-03-26,0.283000
2011-07-05,0.372000
2015-09-25,0.516000
2010-12-22,0.358000
2015-07-02,0.724000
2000-09-20,0.188000
2004-06-25,0.281000
2022-03-24,0.702000
2004-12-23,0.423000
2010-03-24,0.264000
2007-06-28,0.460000
2011-03-24,0.308000
2018-12-17,0.826000
2019-12-16,1.153000
2011-09-23,0.334000
2024-03-21,0.770000
2004-09-24,0.311000
2005-06-20,0.282000
2014-12-24,0.618000
2025-12-16,1.019000
2021-12-13,0.716000
2024-12-17,0.980000
2025-03-18,0.802000
2011-12-22,0.444000
2003-09-12,0.273000
2005-03-24,0.524000
2008-09-24,0.431000
2009-03-24,0.401000
2009-09-22,0.262000
2021-03-25,0.614000
2001-06-08,0.173000
2007-09-25,0.524000
2010-07-02,0.321000
2013-07-02,0.471000
2020-09-23,0.720000
2010-09-23,0.340000
2015-12-24,0.667000
2008-03-24,0.490000
2008-07-02,0.506000
2013-12-23,0.556000
2019-03-20,0.666000
2000-12-13,0.186000
2003-12-16,0.278000
2009-12-23,0.351000
2013-09-24,0.420000
2002-12-13,0.303000
2013-03-25,0.388000
2019-06-17,0.704000
2026-03-17,0.821000
2023-09-26,0.986000
2025-06-16,0.837000
2006-03-24,0.395000
2017-03-24,0.579000
2024-06-11,0.699000
2017-09-26,0.663000
2023-06-07,0.627000
2001-10-01,0.280000
2002-09-13,0.252000
2018-07-03,0.716000
2022-12-13,0.975000
2023-12-20,0.963000
2009-07-02,0.341000
2014-03-25,0.473000
2001-03-09,0.176000
2005-09-23,0.426000
2008-12-23,0.404000
2022-09-26,0.933000
2006-09-26,0.405000
2006-06-22,0.376000
2014-07-02,0.522000
2015-03-25,0.514000
2003-12-12,0.357000
2016-12-22,0.773000
2020-03-25,0.793000
2019-09-24,0.823000
2023-03-23,0.763000
2012-09-24,0.415000
2016-07-06,0.616000
2002-06-14,0.231000
2020-12-14,0.596000
2006-12-20,0.516000
2016-09-26,0.521000
2018-03-22,0.681000
2026-06-15,0.761000
2018-09-26,0.790000
2025-09-16,0.902000
2001-12-14,0.237000
2003-06-13,0.256000
2005-12-22,0.464000
2021-06-10,0.585000
2000-06-21,0.069000
2024-09-25,1.023000
2007-03-23,0.456000
2007-12-27,0.490000
2012-12-19,0.521000
2017-12-21,0.635000
2012-03-23,0.363000
2016-03-23,0.610000
2021-09-24,0.813000
2012-06-26,0.378000
2014-09-24,0.476000
2022-06-09,0.644000