f/overrides/event-backup/jrs-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
2004-04-13,0.115000
2005-05-11,0.135000
2006-08-11,0.165000
2003-04-11,0.115000
2008-03-12,0.500000
2011-09-13,0.230000
2012-06-13,0.230000
2023-09-14,0.170000
2024-12-13,0.170000
2003-03-12,0.115000
2005-09-13,0.145000
2006-05-11,0.155000
2019-06-13,0.190000
2024-09-13,0.170000
2004-07-13,0.115000
2009-06-11,0.220000
2022-09-14,0.209000
2009-03-11,0.270000
2012-03-13,0.230000
2014-06-11,0.225000
2017-12-14,0.250000
2021-09-14,0.190000
2022-03-14,0.209000
2004-05-12,0.115000
2008-09-11,0.458000
2010-06-11,0.220000
2012-12-12,0.230000
2002-02-13,0.113000
2006-01-11,0.145000
2007-01-10,0.190000
2007-02-13,0.190000
2016-03-11,0.240000
2022-12-14,0.209000
2002-04-11,0.113000
2005-10-12,0.145000
2016-06-13,0.240000
2016-09-13,0.250000
2018-06-14,0.205000
2019-03-14,0.190000
2002-01-11,0.113000
2020-03-12,0.190000
2020-12-14,0.190000
2017-06-13,0.250000
2015-12-11,0.240000
2024-06-14,0.170000
2015-03-11,0.240000
2019-09-12,0.190000
2025-12-15,0.170000
2005-06-13,0.135000
2004-08-11,0.115000
2006-06-13,0.165000
2014-09-11,0.225000
2003-01-13,0.115000
2006-09-13,0.175000
2016-12-13,0.250000
2021-12-14,0.190000
2005-01-12,0.135000
2003-10-10,0.115000
2003-07-11,0.115000
2015-09-11,0.240000
2002-12-11,0.153000
2003-02-12,0.115000
2004-10-13,0.135000
2004-12-13,0.135000
2005-08-11,0.135000
2007-12-12,0.570000
2012-09-12,0.230000
2013-06-12,0.240000
2002-06-12,0.113000
2002-10-10,0.115000
2003-11-12,0.115000
2004-01-13,0.115000
2005-02-11,0.135000
2006-10-11,0.175000
2002-07-11,0.113000
2003-09-11,0.115000
2005-03-11,0.135000
2005-12-13,0.145000
2006-04-11,0.155000
2006-12-27,0.738000
2003-05-13,0.115000
2011-06-13,0.230000
2018-09-13,0.205000
2022-06-14,0.209000
2023-06-14,0.170000
2011-03-11,0.220000
2010-09-13,0.220000
2015-06-11,0.240000
2020-09-14,0.190000
2023-12-14,0.170000
2025-09-15,0.170000
2007-06-13,0.570000
2005-07-13,0.135000
2006-07-12,0.165000
2019-12-12,0.190000
2023-03-14,0.170000
2025-03-14,0.170000
2004-06-14,0.115000
2004-03-11,0.115000
2009-12-11,0.220000
2002-05-13,0.113000
2014-03-12,0.225000
2014-12-11,0.225000
2020-06-12,0.190000
2013-09-11,0.240000
2003-12-11,0.115000
2008-12-11,0.336000
2017-09-14,0.250000
2026-06-15,0.190000
2002-09-11,0.115000
2004-11-10,0.135000
2007-03-13,0.190000
2007-09-12,0.570000
2021-06-14,0.190000
2024-03-14,0.170000
2002-03-13,0.113000
2005-11-10,0.145000
2017-03-13,0.250000
2018-03-14,0.230000
2018-12-13,0.205000
2025-06-13,0.170000
2002-11-13,0.115000
2009-09-11,0.220000
2010-12-13,0.220000
2013-12-11,0.225000
2003-08-13,0.115000
2006-02-13,0.145000
2021-03-12,0.190000
2026-03-13,0.170000
2005-04-13,0.135000
2004-02-11,0.115000
2004-09-13,0.135000
2006-03-13,0.155000
2008-06-11,0.500000
2011-12-13,0.230000
2013-03-13,0.240000
2002-08-13,0.113000
2006-11-13,0.175000
2006-12-13,0.190000
2007-04-11,0.190000
2010-03-11,0.220000
2003-06-11,0.115000