f/overrides/event-backup/iwv-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
2006-03-24,0.235000
2004-12-23,0.444000
2022-12-13,1.071000
2007-03-23,0.337000
2020-03-25,0.722000
2021-06-10,0.536000
2025-06-16,0.888000
2025-09-16,0.940000
2004-09-24,0.244000
2021-12-13,0.812000
2025-12-16,1.077000
2016-07-06,0.646000
2021-03-25,0.691000
2014-03-25,0.445000
2015-03-25,0.508000
2001-03-09,0.139000
2010-09-23,0.295000
2017-03-24,0.572000
2020-12-14,0.827000
2000-06-21,0.061000
2003-03-07,0.171000
2010-03-24,0.244000
2005-03-24,0.406000
2007-12-27,0.356000
2011-07-05,0.333000
2003-12-16,0.220000
2006-12-20,0.337000
2004-03-26,0.213000
2013-03-25,0.409000
2012-09-24,0.379000
2017-09-26,0.615000
2014-09-24,0.451000
2004-06-25,0.205000
2005-09-23,0.312000
2018-07-03,0.636000
2022-03-24,0.766000
2023-06-07,0.646000
2024-03-21,0.752000
2026-06-15,0.960000
2015-07-02,0.634000
2002-03-08,0.145000
2002-06-14,0.199000
2008-07-02,0.341000
2026-03-17,0.751000
2011-09-23,0.295000
2012-06-26,0.351000
2017-07-06,0.641000
2019-09-24,0.767000
2002-12-13,0.206000
2010-12-22,0.354000
2016-03-23,0.576000
2018-09-26,0.765000
2018-12-17,0.847000
2022-06-09,0.634000
2003-06-13,0.230000
2005-12-22,0.359000
2008-03-24,0.330000
2013-07-02,0.443000
2024-12-17,1.017000
2025-03-18,0.827000
2000-09-20,0.148000
2015-12-24,0.652000
2024-09-25,1.077000
2006-06-22,0.278000
2012-12-19,0.589000
2018-03-22,0.645000
2020-06-15,0.599000
2023-03-23,0.831000
2003-09-12,0.197000
2011-03-24,0.292000
2022-09-26,0.976000
2021-09-24,0.841000
2014-12-24,0.581000
2023-09-26,1.009000
2002-09-13,0.310000
2010-07-02,0.300000
2000-12-13,0.278000
2001-06-08,0.141000
2001-12-14,0.180000
2007-09-25,0.382000
2015-09-25,0.475000
2019-03-20,0.613000
2014-07-02,0.510000
2017-12-21,0.664000
2012-03-23,0.330000
2016-12-22,0.676000
2007-06-28,0.326000
2008-12-23,0.329000
2009-03-24,0.318000
2009-07-02,0.283000
2023-12-20,1.061000
2006-09-26,0.321000
2009-12-23,0.346000
2013-12-23,0.520000
2001-10-01,0.176000
2003-12-12,0.282000
2015-12-29,0.123000
2019-06-17,0.922000
2019-12-16,0.885000
2020-09-23,0.767000
2024-06-11,0.773000
2005-06-20,0.204000
2008-09-24,0.310000
2011-12-22,0.425000
2016-09-26,0.486000
2009-09-22,0.248000
2013-09-24,0.410000