f/overrides/event-backup/ivv-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
2020-12-14,1.610000
2022-09-26,1.906000
2024-09-25,2.235000
2003-09-15,0.421000
2005-03-28,0.741000
2012-03-26,0.632000
2017-03-24,1.032000
2006-12-21,0.708000
2009-06-23,0.480000
2009-09-23,0.525000
2011-03-25,0.599000
2013-03-25,0.743000
2015-03-25,1.002000
2000-06-21,0.119000
2018-09-26,1.277000
2019-06-17,1.778000
2017-12-19,1.273000
2008-03-25,0.689000
2010-12-23,0.616000
2004-06-28,0.405000
2013-06-26,0.808000
2025-09-16,1.995000
2002-09-16,0.394000
2016-12-21,1.304000
2018-06-26,1.281000
2022-12-13,1.724000
2006-03-27,0.518000
2009-03-25,0.557000
2003-06-16,0.367000
2015-12-24,1.187000
2025-06-16,1.867000
2003-12-16,0.388000
2005-12-23,0.514000
2025-12-16,2.414000
2000-09-20,0.277000
2014-03-25,0.831000
2014-09-24,0.934000
2010-03-25,0.497000
2015-12-29,0.190000
2020-03-25,1.531000
2023-06-07,1.339000
2013-12-23,0.959000
2007-12-27,0.798000
2008-09-25,0.679000
2021-09-24,1.693000
2003-03-10,0.335000
2008-06-24,0.632000
2022-03-24,1.481000
2023-09-26,1.987000
2007-06-29,0.667000
2011-06-23,0.605000
2026-03-17,1.784000
2003-12-15,0.514000
2002-06-17,0.373000
2006-06-23,0.528000
2015-09-25,1.082000
2018-03-22,1.229000
2019-03-20,1.130000
2019-09-24,1.483000
2014-06-24,0.915000
2006-09-27,0.619000
2023-12-20,1.925000
2002-03-11,0.293000
2011-12-22,0.770000
2019-12-16,2.039000
2020-06-15,1.261000
2024-03-21,1.665000
2004-12-27,0.845000
2010-09-24,0.626000
2002-12-16,0.423000
2005-06-21,0.387000
2009-12-24,0.598000
2020-09-23,1.506000
2022-06-09,1.283000
2014-12-24,1.103000
2016-06-21,0.998000
2025-03-18,1.765000
2010-06-23,0.496000
2015-06-24,1.181000
2023-03-23,1.648000
2004-09-27,0.464000
2001-06-11,0.352000
2001-12-17,0.340000
2007-03-26,0.641000
2012-09-25,0.798000
2024-06-11,1.611000
2000-12-13,0.439000
2024-12-17,2.134000
2013-09-24,0.835000
2018-12-17,1.442000
2001-10-02,0.393000
2021-06-10,1.225000
2026-06-15,1.996000
2017-09-26,1.284000
2017-06-27,1.117000
2018-12-28,0.322000
2012-06-19,0.639000
2008-12-24,0.662000
2011-09-26,0.630000
2004-03-29,0.389000
2016-09-26,1.103000
2021-12-13,1.498000
2012-12-19,0.930000
2007-09-26,0.687000
2021-03-25,1.311000
2005-09-26,0.504000
2001-03-12,0.243000