f/overrides/event-backup/jqc-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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Plaintext

Date,Dividends
2017-05-11,0.053000
2021-05-13,0.060000
2026-08-14,0.050000
2013-04-11,0.069000
2020-08-13,0.081000
2022-02-14,0.039000
2023-08-14,0.048000
2025-08-15,0.054000
2016-03-11,0.052000
2007-02-13,0.095000
2015-02-11,0.049000
2016-08-11,0.052000
2019-04-12,0.104000
2022-05-12,0.039000
2009-03-11,0.160000
2006-04-11,0.084000
2007-09-12,0.285000
2014-08-13,0.044000
2017-07-12,0.053000
2018-01-11,0.048000
2023-03-14,0.048000
2024-05-14,0.054000
2005-02-11,0.098000
2006-01-11,0.084000
2011-03-11,0.190000
2020-06-12,0.081000
2022-04-13,0.039000
2003-09-11,0.098000
2016-04-13,0.052000
2021-06-14,0.055000
2022-08-12,0.042000
2013-05-13,0.062000
2012-08-13,0.067000
2020-03-12,0.092000
2011-09-13,0.200000
2013-03-13,0.069000
2016-12-13,0.053000
2024-02-14,0.054000
2003-08-14,0.098000
2005-12-13,0.084000
2013-09-11,0.058000
2014-05-13,0.053000
2014-09-11,0.044000
2017-01-11,0.053000
2004-12-13,0.098000
2007-12-12,0.285000
2017-12-14,0.048000
2018-06-14,0.037000
2019-09-12,0.104000
2022-09-14,0.042000
2025-09-15,0.054000
2006-02-13,0.084000
2008-12-11,0.187000
2019-05-14,0.104000
2021-09-14,0.042000
2025-07-15,0.054000
2026-01-15,0.054000
2026-03-13,0.050000
2026-07-15,0.050000
2007-06-13,0.285000
2015-07-13,0.050000
2017-08-11,0.053000
2021-10-14,0.039000
2025-11-14,0.054000
2014-10-10,0.044000
2011-12-13,0.200000
2009-09-11,0.160000
2024-07-15,0.054000
2025-01-15,0.054000
2025-03-14,0.054000
2006-06-13,0.095000
2007-01-10,0.095000
2006-05-11,0.095000
2022-12-14,0.048000
2015-03-11,0.049000
2004-01-13,0.098000
2016-01-13,0.052000
2003-11-12,0.098000
2019-07-12,0.104000
2006-08-11,0.095000
2018-03-14,0.041000
2019-06-13,0.104000
2010-12-13,0.175000
2005-01-12,0.098000
2005-06-13,0.089000
2021-03-12,0.068000
2025-06-13,0.054000
2026-04-15,0.050000
2004-09-13,0.098000
2020-10-14,0.081000
2006-03-13,0.084000
2016-06-13,0.052000
2012-10-11,0.067000
2006-07-12,0.095000
2009-06-11,0.150000
2010-09-13,0.175000
2021-11-12,0.039000
2005-11-10,0.084000
2022-06-14,0.039000
2024-12-13,0.054000
2021-02-11,0.072000
2014-01-13,0.055000
2024-11-15,0.054000
2008-09-11,0.247000
2021-08-12,0.047000
2005-07-13,0.089000
2015-05-13,0.049000
2015-10-13,0.050000
2017-09-14,0.048000
2023-06-14,0.048000
2024-08-15,0.054000
2026-05-15,0.050000
2005-05-11,0.093000
2013-06-12,0.062000
2019-08-14,0.104000
2004-08-11,0.098000
2015-09-11,0.050000
2016-07-13,0.052000
2018-02-14,0.048000
2019-12-12,0.104000
2023-07-13,0.048000
2013-12-11,0.055000
2016-10-12,0.052000
2019-10-11,0.104000
2020-07-14,0.081000
2008-06-11,0.285000
2010-06-11,0.175000
2014-06-11,0.044000
2010-03-11,0.175000
2015-12-11,0.052000
2022-01-13,0.039000
2005-04-13,0.093000
2013-01-11,0.069000
2016-09-13,0.052000
2012-12-12,0.069000
2012-03-13,0.200000
2020-11-12,0.081000
2003-10-10,0.098000
2015-04-13,0.049000
2018-05-14,0.041000
2023-04-13,0.048000
2004-11-10,0.098000
2005-12-22,0.053000
2012-07-11,0.067000
2016-02-10,0.052000
2018-12-13,0.039000
2004-06-14,0.098000
2016-05-11,0.052000
2023-12-14,0.054000
2025-05-15,0.054000
2006-11-13,0.095000
2008-03-12,0.285000
2009-12-11,0.175000
2007-03-13,0.095000
2022-03-14,0.039000
2024-06-14,0.054000
2012-11-13,0.067000
2019-01-14,0.102000
2021-04-14,0.064000
2024-10-15,0.054000
2025-04-15,0.054000
2006-10-11,0.095000
2015-06-11,0.050000
2012-09-12,0.067000
2004-04-13,0.098000
2020-12-14,0.081000
2018-09-13,0.039000
2017-02-13,0.053000
2018-08-14,0.037000
2019-02-14,0.102000
2022-11-14,0.048000
2025-10-15,0.054000
2004-05-12,0.098000
2004-03-11,0.098000
2017-11-14,0.048000
2023-02-14,0.048000
2024-09-13,0.054000
2025-12-15,0.054000
2004-02-11,0.098000
2013-08-13,0.062000
2014-04-11,0.053000
2017-10-12,0.048000
2024-01-11,0.054000
2013-07-11,0.062000
2004-10-13,0.098000
2005-03-11,0.093000
2022-07-14,0.042000
2004-07-13,0.098000
2019-03-14,0.104000
2021-01-14,0.077000
2023-11-14,0.054000
2005-09-13,0.084000
2013-11-13,0.058000
2014-11-12,0.044000
2020-05-14,0.088000
2024-03-14,0.054000
2003-12-11,0.098000
2015-11-10,0.050000
2020-04-14,0.088000
2012-04-11,0.067000
2018-04-12,0.041000
2014-03-12,0.053000
2012-06-13,0.067000
2013-10-10,0.058000
2018-07-12,0.037000
2023-09-14,0.054000
2026-02-13,0.054000
2011-06-13,0.200000
2012-05-11,0.067000
2024-04-12,0.054000
2006-12-13,0.095000
2021-12-14,0.039000
2004-12-27,0.098000
2020-09-14,0.081000
2015-01-13,0.043000
2017-06-13,0.053000
2018-11-14,0.039000
2021-07-14,0.051000
2014-12-11,0.044000
2014-07-11,0.044000
2016-11-10,0.052000
2017-04-11,0.053000
2018-10-12,0.039000
2019-11-14,0.104000
2013-02-13,0.069000
2005-10-12,0.084000
2015-08-12,0.050000
2020-02-13,0.092000
2023-10-12,0.054000
2025-02-14,0.054000
2005-08-11,0.089000
2023-05-12,0.048000
2026-06-15,0.050000
2006-09-13,0.095000
2023-01-12,0.048000
2014-02-12,0.055000
2020-01-14,0.092000
2022-10-13,0.042000
2017-03-13,0.053000