f/overrides/event-backup/ijj-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
2015-03-25,0.209500
2017-09-26,0.309000
2018-09-26,0.324000
2024-03-21,0.367000
2001-03-12,0.059750
2005-03-28,0.127250
2011-09-26,0.173000
2026-06-15,0.515000
2013-09-24,0.212500
2022-09-26,0.656000
2025-09-16,0.572000
2010-09-24,0.159500
2009-03-25,0.159500
2023-03-23,0.454000
2000-12-13,0.098750
2003-12-31,0.023000
2015-12-24,0.349000
2000-09-20,0.064000
2009-09-23,0.156500
2015-09-25,0.264000
2024-06-11,0.516000
2001-10-02,0.077500
2006-09-27,0.170500
2025-12-16,0.819000
2007-06-29,0.159500
2008-06-24,0.204000
2016-03-23,0.259500
2017-06-27,0.306000
2020-09-23,0.379000
2023-06-07,0.350000
2007-03-26,0.178000
2010-12-23,0.198000
2003-12-15,0.095000
2014-03-25,0.215000
2023-12-20,0.542000
2014-09-24,0.242500
2019-12-16,0.425000
2024-12-17,0.648000
2014-06-24,0.225500
2002-06-17,0.068000
2006-12-21,0.227000
2008-03-25,0.095500
2022-03-24,0.407000
2010-06-23,0.133000
2012-03-26,0.155000
2020-12-14,0.362000
2017-12-19,0.364500
2021-12-13,0.509000
2023-09-26,0.574000
2009-12-24,0.217500
2008-09-25,0.204000
2015-06-24,0.249500
2019-06-17,0.340000
2003-06-16,0.072250
2005-06-21,0.132000
2007-12-27,0.195000
2004-09-27,0.088500
2004-12-27,0.118500
2011-03-25,0.138500
2022-06-09,0.364000
2022-12-13,0.557000
2002-12-16,0.077250
2003-03-10,0.069750
2005-12-23,0.195500
2021-09-24,0.562000
2025-03-18,0.450000
2002-09-16,0.011000
2014-12-24,0.370500
2019-09-24,0.371500
2005-09-26,0.124000
2016-12-21,0.361000
2012-12-19,0.317000
2010-03-25,0.127500
2004-06-28,0.100500
2020-03-25,0.497500
2001-06-11,0.057000
2024-09-25,0.729000
2004-03-29,0.079000
2013-06-26,0.204000
2026-03-17,0.437000
2007-09-26,0.161500
2011-06-23,0.152000
2012-06-19,0.170000
2016-09-26,0.331500
2001-12-17,0.072000
2003-09-15,0.079250
2003-12-16,0.074500
2025-06-16,0.517000
2018-12-17,0.366500
2009-06-23,0.142500
2013-03-25,0.180000
2017-03-24,0.240500
2018-06-26,0.333000
2006-06-23,0.170500
2018-03-22,0.365000
2020-06-15,0.298500
2021-06-10,0.346000
2002-03-11,0.059500
2011-12-22,0.212500
2006-03-27,0.142000
2021-03-25,0.374000
2016-06-21,0.260000
2019-03-20,0.313500
2008-12-24,0.287000
2012-09-25,0.197000
2013-12-23,0.261500