f/overrides/event-backup/lzhox-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
2013-08-30,0.096000
2015-08-31,0.076000
2015-09-30,0.076000
2016-08-26,0.064000
2021-03-31,0.059000
2025-09-30,0.080000
2000-04-28,0.316000
2010-10-29,0.112000
2012-01-31,0.108000
2013-09-30,0.092000
2013-11-29,0.092000
2019-12-31,0.064000
2000-09-29,0.312000
2003-11-28,0.152000
2007-09-28,0.124000
2011-10-31,0.108000
2013-07-31,0.096000
2024-05-31,0.067000
2018-12-31,0.068000
2001-01-31,0.284000
2006-04-28,0.124000
2008-02-29,0.132000
2009-12-31,0.108000
2019-04-30,0.068000
2023-03-31,0.059000
2000-08-31,0.324000
2010-09-30,0.112000
2017-03-31,0.072000
2017-11-21,0.048000
2018-06-29,0.068000
2021-05-28,0.058000
2000-02-01,0.332000
2006-02-28,0.124000
2007-08-31,0.128000
2013-10-31,0.092000
2023-02-28,0.060000
2023-10-31,0.059000
2016-06-30,0.072000
2019-08-30,0.068000
2021-09-30,0.054000
2022-05-31,0.054000
2024-04-30,0.068000
2024-07-31,0.074000
2003-10-31,0.132000
2005-08-31,0.124000
2008-01-31,0.128000
2016-04-29,0.072000
2018-08-31,0.068000
2025-07-31,0.082000
2011-01-31,0.112000
2024-03-28,0.070000
2024-12-31,0.078000
2003-04-30,0.144000
2003-07-31,0.124000
2017-01-31,0.068000
2020-01-31,0.072000
2005-11-30,0.168000
2011-08-31,0.112000
2015-05-01,0.004000
2018-03-29,0.068000
2010-12-31,0.112000
2025-08-29,0.083000
2003-09-30,0.132000
2004-12-31,0.128000
2022-08-25,0.050000
2025-01-31,0.080000
2025-10-31,0.083000
2026-07-31,0.088000
2005-06-30,0.128000
2008-09-30,0.124000
2009-04-30,0.112000
2015-03-31,0.076000
2021-02-26,0.060000
2003-03-31,0.136000
2009-06-30,0.112000
2009-07-31,0.112000
2019-07-31,0.068000
2020-10-30,0.064000
2025-06-30,0.080000
1999-04-30,0.276000
2006-12-29,0.140000
2012-08-31,0.104000
2014-05-30,0.084000
2014-07-31,0.084000
2023-04-28,0.055000
2007-12-31,0.136000
2021-11-30,0.055000
2007-11-30,0.128000
2024-11-29,0.081000
2005-07-29,0.136000
2010-11-30,0.112000
2011-11-30,0.108000
2022-12-30,0.058000
1999-06-30,0.276000
1999-11-30,0.344000
2000-12-29,0.316000
2007-06-29,0.124000
2008-08-29,0.124000
2015-01-30,0.080000
2021-10-29,0.053000
2021-12-31,0.056000
1999-05-28,0.276000
1999-12-31,0.300000
2003-08-29,0.144000
2004-04-30,0.136000
2015-12-31,0.076000
2000-06-30,0.304000
2006-09-29,0.128000
2008-10-31,0.124000
2009-03-31,0.112000
2013-06-28,0.100000
2014-11-28,0.080000
2019-09-30,0.068000
2021-08-31,0.053000
2022-11-30,0.059000
1999-10-29,0.328000
2006-11-30,0.124000
2020-05-29,0.064000
2021-04-30,0.058000
2003-05-30,0.172000
2007-05-31,0.132000
2019-10-31,0.068000
2020-08-31,0.064000
2023-08-31,0.061000
2003-06-30,0.136000
2005-01-31,0.132000
2023-09-29,0.062000
2000-05-31,0.312000
2004-11-30,0.140000
2012-06-29,0.108000
2014-08-29,0.080000
2022-06-30,0.058000
2024-06-28,0.068000
2025-02-28,0.076000
1998-12-17,0.064000
2004-10-29,0.124000
2006-06-30,0.124000
2017-05-31,0.072000
2018-11-30,0.068000
2019-03-29,0.068000
2023-01-31,0.055000
2023-12-29,0.063000
1999-03-31,0.264000
2004-01-30,0.136000
2005-12-30,0.144000
2006-07-31,0.124000
2012-10-31,0.100000
2018-01-31,0.068000
2022-04-29,0.055000
2025-03-31,0.076000
1998-11-30,0.300000
2005-02-28,0.152000
2006-01-31,0.128000
2008-05-30,0.120000
2009-09-30,0.116000
2014-02-28,0.092000
2014-10-31,0.044000
2001-02-28,0.260000
2012-12-31,0.100000
2022-10-31,0.059000
2004-09-30,0.128000
2010-07-30,0.112000
2013-12-31,0.092000
2017-07-31,0.068000
2018-02-28,0.072000
2024-08-30,0.074000
2025-11-28,0.085000
2006-10-31,0.132000
2020-02-28,0.056000
2020-11-30,0.037000
2023-07-31,0.060000
1999-09-30,0.264000
2017-04-28,0.072000
2025-12-31,0.083000
2004-02-27,0.160000
2017-10-31,0.068000
1998-08-31,0.292000
1999-02-26,0.300000
2007-01-31,0.124000
2012-11-30,0.108000
2005-04-29,0.128000
2007-04-30,0.140000
2008-07-31,0.124000
2011-07-29,0.108000
2020-09-30,0.064000
2007-10-31,0.128000
2009-01-30,0.108000
2014-12-31,0.080000
2015-11-30,0.076000
2018-09-28,0.068000
2023-06-30,0.060000
2000-02-29,0.292000
2011-12-30,0.116000
2016-01-29,0.072000
2000-10-31,0.308000
2003-12-31,0.144000
2009-08-31,0.112000
2012-02-29,0.108000
2013-01-31,0.096000
2015-07-31,0.076000
2018-10-31,0.068000
2019-06-28,0.068000
2020-06-30,0.064000
2005-05-31,0.144000
2007-07-31,0.124000
2014-01-31,0.088000
2018-07-31,0.068000
2026-02-27,0.080000
1998-09-30,0.316000
1998-10-30,0.316000
2006-08-31,0.132000
2007-03-30,0.140000
2008-11-28,0.120000
2008-12-31,0.124000
2019-05-31,0.068000
2020-07-31,0.064000
2021-07-30,0.055000
2022-02-28,0.056000
2021-06-30,0.056000
2025-05-30,0.082000
2009-11-30,0.112000
2013-05-31,0.096000
2020-12-31,0.060000
2000-07-31,0.352000
2006-05-31,0.128000
2011-02-28,0.116000
2011-05-31,0.108000
2016-07-29,0.072000
1998-12-31,0.268000
2017-08-31,0.068000
2018-05-31,0.068000
2023-05-31,0.059000
2012-09-28,0.100000
2013-03-28,0.096000
2014-04-30,0.084000
2026-06-30,0.088000
2009-10-30,0.116000
2010-08-31,0.120000
2014-03-31,0.088000
2024-01-31,0.063000
2026-04-30,0.086000
2005-03-31,0.128000
2008-03-31,0.120000
2016-05-31,0.072000
2022-01-31,0.051000
2024-09-30,0.069000
1998-07-31,0.300000
2000-11-30,0.288000
2004-05-28,0.160000
1999-01-29,0.300000
2004-08-31,0.152000
2005-09-30,0.136000
2008-04-30,0.124000
2011-09-30,0.112000
2019-02-28,0.072000
2000-03-31,0.308000
2004-03-31,0.140000
2004-06-30,0.132000
2012-07-31,0.108000
2016-02-29,0.072000
2020-04-30,0.068000
2023-11-30,0.064000
1998-03-31,0.184000
2012-03-30,0.108000
2022-07-29,0.053000
2015-02-27,0.080000
2017-02-28,0.072000
2009-05-29,0.108000
2011-04-29,0.108000
2012-04-30,0.112000
1999-07-30,0.336000
2009-02-27,0.112000
2024-02-29,0.067000
1998-05-29,0.272000
1999-08-31,0.296000
2014-09-30,0.084000
2015-06-30,0.076000
2018-04-30,0.068000
2022-09-30,0.060000
2011-03-31,0.108000
2017-06-30,0.068000
2021-01-29,0.059000
2025-04-30,0.082000
2026-01-30,0.081000
2005-10-31,0.128000
2006-03-31,0.132000
2007-02-28,0.140000
2017-09-29,0.068000
2022-03-31,0.056000
2004-07-30,0.140000
2008-06-30,0.128000
2012-05-31,0.108000
2015-10-30,0.076000
2024-10-31,0.077000
2026-03-31,0.089000
2026-05-29,0.087000
1998-06-30,0.304000
2011-06-30,0.112000
2013-02-28,0.100000
2014-06-30,0.084000
2020-03-31,0.064000
1998-04-30,0.312000
2013-04-30,0.096000
2019-01-31,0.072000
2019-11-29,0.068000