f/overrides/event-backup/eim-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
2008-11-19,0.065000
2015-05-20,0.064000
2017-12-21,0.052000
2019-10-23,0.043000
2006-10-20,0.064000
2010-06-21,0.076000
2026-03-16,0.051000
2018-06-21,0.048000
2021-01-21,0.050000
2022-02-17,0.050000
2023-09-21,0.033000
2025-11-14,0.051000
2014-08-20,0.064000
2016-10-20,0.056000
2021-04-22,0.050000
2024-01-22,0.047000
2024-04-22,0.047000
2024-06-21,0.047000
2016-04-20,0.061000
2026-08-14,0.051000
2007-01-22,0.064000
2020-12-23,0.050000
2003-05-21,0.075000
2003-02-20,0.076000
2011-02-16,0.076000
2005-12-20,0.074000
2007-12-19,0.251000
2011-06-21,0.076000
2011-09-21,0.076000
2014-06-19,0.064000
2018-05-23,0.048000
2023-02-21,0.035000
2025-02-14,0.051000
2012-06-20,0.064000
2014-01-22,0.064000
2015-03-20,0.064000
2015-09-21,0.064000
2016-09-21,0.056000
2017-06-21,0.052000
2004-11-22,0.078000
2005-02-17,0.078000
2006-03-22,0.067000
2008-12-22,0.065000
2011-04-19,0.076000
2019-03-20,0.043000
2022-04-21,0.045000
2022-09-22,0.041000
2004-07-22,0.078000
2010-05-19,0.076000
2016-03-22,0.061000
2021-08-23,0.050000
2004-05-20,0.078000
2006-01-20,0.067000
2009-12-22,0.075000
2013-07-22,0.064000
2017-02-16,0.054000
2024-05-23,0.047000
2009-05-20,0.067000
2010-01-20,0.075000
2020-09-22,0.050000
2003-06-19,0.076000
2018-02-20,0.048000
2021-09-22,0.050000
2024-08-22,0.051000
2025-09-15,0.051000
2006-06-21,0.064000
2006-11-20,0.064000
2010-09-21,0.076000
2016-12-21,0.054000
2021-06-22,0.050000
2026-01-15,0.051000
2010-10-20,0.076000
2017-10-23,0.052000
2018-08-23,0.048000
2011-11-21,0.072000
2013-09-19,0.064000
2016-07-20,0.058000
2022-08-23,0.041000
2012-03-21,0.066000
2013-02-19,0.064000
2014-12-22,0.064000
2015-04-21,0.064000
2017-03-22,0.054000
2020-03-23,0.050000
2023-01-23,0.035000
2023-03-21,0.035000
2005-05-19,0.078000
2011-03-22,0.076000
2023-05-19,0.035000
2023-06-21,0.035000
2005-06-21,0.078000
2006-07-20,0.064000
2007-09-19,0.064000
2008-05-13,0.064000
2008-10-22,0.065000
2015-12-21,0.064000
2016-01-20,0.064000
2019-08-22,0.043000
2023-12-21,0.033000
2025-05-15,0.051000
2025-07-15,0.051000
2003-04-22,0.076000
2006-12-19,0.064000
2010-12-21,0.076000
2013-04-19,0.064000
2017-01-20,0.054000
2017-03-09,0.054000
2018-04-20,0.048000
2023-11-21,0.033000
2019-01-11,0.043000
2020-08-21,0.050000
2022-07-21,0.041000
2024-03-20,0.047000
2007-06-20,0.064000
2008-06-19,0.064000
2010-03-22,0.076000
2022-12-22,0.035000
2002-11-21,0.075000
2009-01-21,0.065000
2013-08-21,0.064000
2014-10-22,0.064000
2015-11-19,0.064000
2021-05-20,0.050000
2009-08-20,0.075000
2020-10-22,0.050000
2024-07-23,0.051000
2007-10-22,0.064000
2013-05-22,0.064000
2008-07-22,0.064000
2017-04-19,0.054000
2019-11-21,0.043000
2023-04-21,0.035000
2007-03-21,0.064000
2010-08-20,0.076000
2013-12-20,0.064000
2015-06-19,0.064000
2015-07-22,0.064000
2017-05-22,0.052000
2020-11-20,0.050000
2003-09-22,0.076000
2004-06-22,0.078000
2025-06-16,0.051000
2004-12-21,0.078000
2006-04-19,0.067000
2006-05-22,0.067000
2010-11-19,0.076000
2012-01-20,0.066000
2012-11-20,0.064000
2018-07-23,0.048000
2005-01-20,0.078000
2018-03-21,0.048000
2019-12-23,0.043000
2006-09-20,0.064000
2009-10-21,0.075000
2025-03-14,0.051000
2026-05-15,0.051000
2007-11-20,0.064000
2021-12-22,0.050000
2022-11-22,0.035000
2003-11-20,0.078000
2004-01-22,0.078000
2008-04-21,0.064000
2009-07-22,0.067000
2011-08-22,0.076000
2018-12-12,0.043000
2002-10-22,0.076000
2007-07-20,0.064000
2020-04-22,0.045000
2023-08-21,0.033000
2008-08-20,0.065000
2021-07-22,0.050000
2026-06-15,0.051000
2003-01-22,0.076000
2009-09-21,0.075000
2012-04-19,0.066000
2018-01-23,0.052000
2012-02-17,0.066000
2015-02-18,0.064000
2017-11-21,0.052000
2004-02-19,0.078000
2007-02-16,0.064000
2011-10-20,0.076000
2014-09-19,0.064000
2016-08-22,0.058000
2003-10-22,0.078000
2008-09-19,0.065000
2022-05-23,0.045000
2023-07-21,0.033000
2004-04-22,0.078000
2011-07-20,0.076000
2012-07-20,0.064000
2015-01-21,0.064000
2017-07-20,0.052000
2023-10-20,0.033000
2026-04-15,0.051000
2002-12-19,0.076000
2012-09-19,0.064000
2024-02-21,0.047000
2010-07-21,0.076000
2013-03-19,0.064000
2014-04-21,0.064000
2016-06-21,0.058000
2020-06-22,0.050000
2015-10-21,0.064000
2018-09-20,0.045000
2019-07-23,0.043000
2022-10-21,0.035000
2004-08-23,0.078000
2005-09-21,0.074000
2009-03-20,0.065000
2021-10-21,0.050000
2021-11-22,0.050000
2022-01-21,0.050000
2003-03-20,0.076000
2004-10-21,0.078000
2005-10-20,0.074000
2008-01-22,0.064000
2014-02-19,0.064000
2014-03-20,0.064000
2003-07-22,0.076000
2005-07-20,0.074000
2013-06-19,0.064000
2009-11-19,0.075000
2016-02-18,0.061000
2022-06-22,0.041000
2004-03-22,0.078000
2024-09-20,0.051000
2010-04-21,0.076000
2011-12-21,0.072000
2017-08-22,0.052000
2020-07-23,0.050000
2025-04-15,0.051000
2025-10-15,0.051000
2016-05-20,0.061000
2019-02-20,0.043000
2026-02-17,0.051000
2008-02-20,0.064000
2010-02-17,0.076000
2014-05-21,0.064000
2019-04-22,0.043000
2024-12-23,0.051000
2005-08-22,0.074000
2006-12-20,0.332000
2007-05-22,0.064000
2009-04-21,0.067000
2014-11-19,0.064000
2019-06-20,0.043000
2007-08-22,0.064000
2011-01-20,0.076000
2012-12-20,0.064000
2013-10-22,0.064000
2011-05-20,0.076000
2013-11-20,0.064000
2026-07-15,0.051000
2012-08-22,0.064000
2014-07-22,0.064000
2017-09-21,0.052000
2018-11-21,0.043000
2024-11-21,0.051000
2025-08-15,0.051000
2009-06-19,0.067000
2013-01-22,0.064000
2020-02-20,0.050000
2003-08-21,0.076000
2022-03-23,0.045000
2025-12-15,0.051000
2005-11-21,0.074000
2005-12-19,0.069000
2006-08-22,0.064000
2012-05-22,0.066000
2015-08-20,0.064000
2024-10-23,0.051000
2004-09-22,0.078000
2005-04-20,0.078000
2009-02-18,0.065000
2012-10-22,0.064000
2016-11-21,0.056000
2018-10-23,0.045000
2025-01-15,0.051000
2005-03-22,0.078000
2006-02-16,0.067000
2019-05-23,0.043000
2021-02-18,0.050000
2021-03-23,0.050000
2003-12-22,0.078000
2007-04-19,0.064000
2008-03-19,0.064000
2019-09-20,0.043000
2020-01-23,0.043000
2020-05-21,0.050000