f/overrides/event-backup/ead-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
2004-04-13,0.138000
2005-12-12,0.125000
2018-08-14,0.052000
2004-01-13,0.138000
2009-04-13,0.109000
2019-03-11,0.059000
2022-05-12,0.060000
2023-04-13,0.050000
2007-06-11,0.116000
2014-05-12,0.068000
2017-08-11,0.060000
2005-03-10,0.138000
2017-11-14,0.056000
2019-01-15,0.060000
2025-01-13,0.053000
2006-07-13,0.116000
2024-08-12,0.052000
2025-08-11,0.054000
2005-11-10,0.125000
2007-05-11,0.116000
2008-11-13,0.109000
2023-05-11,0.049000
2026-02-12,0.053000
2007-01-12,0.116000
2020-07-13,0.057000
2005-09-12,0.128000
2007-04-12,0.116000
2005-08-11,0.128000
2013-08-12,0.068000
2012-12-13,0.077000
2013-11-12,0.068000
2017-01-12,0.068000
2021-09-13,0.059000
2011-04-11,0.085000
2011-09-12,0.085000
2020-01-13,0.059000
2021-02-11,0.056000
2026-06-11,0.053000
2007-03-12,0.116000
2005-01-13,0.138000
2012-10-11,0.077000
2015-02-11,0.068000
2018-04-13,0.052000
2018-12-14,0.061000
2003-06-12,0.138000
2019-11-12,0.059000
2004-03-11,0.138000
2008-05-12,0.109000
2008-08-11,0.109000
2015-12-11,0.068000
2016-09-12,0.068000
2020-11-12,0.056000
2003-08-13,0.138000
2009-07-13,0.093000
2009-12-11,0.093000
2021-10-12,0.060000
2009-01-14,0.109000
2019-02-13,0.060000
2018-01-16,0.056000
2016-06-13,0.068000
2026-04-10,0.053000
2026-05-11,0.053000
2014-04-11,0.068000
2008-12-11,0.109000
2010-02-11,0.093000
2010-12-13,0.085000
2014-12-11,0.068000
2018-07-13,0.052000
2018-10-12,0.061000
2019-06-13,0.059000
2007-02-12,0.116000
2021-05-13,0.057000
2012-06-11,0.077000
2014-02-13,0.068000
2019-09-12,0.059000
2020-04-13,0.060000
2020-08-13,0.057000
2023-06-12,0.048000
2011-03-11,0.085000
2009-02-11,0.109000
2012-05-11,0.085000
2015-06-11,0.068000
2006-01-13,0.125000
2006-12-11,0.116000
2022-07-11,0.059000
2026-07-10,0.053000
2004-07-13,0.138000
2006-11-13,0.116000
2007-12-13,0.116000
2015-07-13,0.068000
2019-10-15,0.059000
2025-11-13,0.054000
2004-10-13,0.138000
2005-04-11,0.128000
2006-04-13,0.125000
2010-05-12,0.085000
2015-10-13,0.068000
2016-08-11,0.068000
2016-11-14,0.068000
2024-05-10,0.052000
2004-11-10,0.138000
2011-12-12,0.085000
2013-04-12,0.068000
2017-06-12,0.060000
2021-12-13,0.061000
2026-08-13,0.053000
2011-02-11,0.085000
2015-08-13,0.068000
2016-10-13,0.068000
2017-04-13,0.060000
2017-12-12,0.056000
2007-11-13,0.116000
2018-06-12,0.052000
2017-05-16,0.060000
2018-02-13,0.056000
2024-10-15,0.052000
2007-07-12,0.116000
2008-02-11,0.109000
2022-06-10,0.060000
2022-09-12,0.057000
2023-08-11,0.048000
2025-04-11,0.054000
2025-12-11,0.054000
2005-10-13,0.125000
2003-12-11,0.138000
2011-05-12,0.085000
2013-06-13,0.068000
2017-03-13,0.060000
2019-08-12,0.059000
2021-04-12,0.056000
2003-09-11,0.138000
2006-08-11,0.116000
2013-12-12,0.068000
2015-01-12,0.068000
2015-03-12,0.068000
2016-12-12,0.068000
2012-09-14,0.077000
2006-10-12,0.116000
2012-02-13,0.085000
2017-02-13,0.068000
2025-10-14,0.054000
2003-07-11,0.138000
2018-09-14,0.052000
2021-11-12,0.060000
2024-02-12,0.052000
2024-11-12,0.053000
2024-12-12,0.053000
2026-01-12,0.054000
2014-06-12,0.068000
2013-05-13,0.068000
2014-11-13,0.068000
2016-01-14,0.068000
2006-02-10,0.125000
2012-03-12,0.085000
2021-08-12,0.059000
2024-07-11,0.052000
2009-10-09,0.093000
2009-08-13,0.093000
2010-06-11,0.085000
2018-05-14,0.052000
2020-02-13,0.059000
2007-10-11,0.116000
2010-03-11,0.093000
2014-03-13,0.068000
2014-08-11,0.068000
2006-06-12,0.125000
2008-06-12,0.109000
2013-10-10,0.068000
2019-04-11,0.059000
2019-07-11,0.059000
2006-05-11,0.125000
2020-09-11,0.057000
2020-10-13,0.056000
2022-10-13,0.056000
2003-05-12,0.138000
2005-02-11,0.138000
2010-01-14,0.093000
2013-07-11,0.068000
2013-09-13,0.068000
2023-07-13,0.048000
2004-06-14,0.138000
2011-06-13,0.085000
2014-07-11,0.068000
2016-04-11,0.068000
2022-01-13,0.061000
2004-12-29,0.330000
2011-08-11,0.085000
2015-04-13,0.068000
2026-03-12,0.053000
2011-01-13,0.085000
2011-11-14,0.085000
2012-01-13,0.085000
2024-01-12,0.052000
2006-03-10,0.125000
2008-07-11,0.109000
2009-05-11,0.109000
2003-04-11,0.138000
2010-04-13,0.085000
2012-04-12,0.085000
2017-10-13,0.056000
2022-03-11,0.061000
2023-01-12,0.052000
2004-08-12,0.138000
2007-09-13,0.116000
2011-10-13,0.085000
2012-11-13,0.077000
2024-04-11,0.052000
2024-06-13,0.052000
2025-07-11,0.053000
2005-07-11,0.128000
2014-10-14,0.068000
2017-09-12,0.056000
2023-03-10,0.050000
2025-02-13,0.053000
2004-02-12,0.138000
2013-02-11,0.077000
2022-11-10,0.055000
2024-03-11,0.052000
2010-09-13,0.085000
2021-06-11,0.058000
2022-12-12,0.054000
2023-11-13,0.047000
2007-08-13,0.116000
2008-03-13,0.109000
2008-04-11,0.109000
2021-01-12,0.056000
2005-06-13,0.128000
2014-01-13,0.068000
2016-03-11,0.068000
2009-09-14,0.093000
2006-09-11,0.116000
2010-08-12,0.085000
2005-12-28,0.171000
2016-05-12,0.068000
2005-05-12,0.128000
2008-01-14,0.109000
2010-07-13,0.085000
2014-09-11,0.068000
2023-10-12,0.047000
2024-09-13,0.052000
2004-09-13,0.138000
2013-03-12,0.068000
2018-11-13,0.061000
2003-11-13,0.138000
2012-08-10,0.077000
2019-12-12,0.059000
2020-05-11,0.059000
2022-04-11,0.061000
2010-11-10,0.085000
2008-10-14,0.109000
2009-03-11,0.109000
2018-03-13,0.052000
2020-06-12,0.058000
2023-09-11,0.048000
2004-05-12,0.138000
2015-11-12,0.068000
2021-03-11,0.056000
2022-02-11,0.061000
2025-03-13,0.053000
2008-09-12,0.109000
2013-01-11,0.077000
2015-09-11,0.068000
2020-03-12,0.060000
2023-02-10,0.051000
2025-05-12,0.054000
2011-07-11,0.085000
2009-06-11,0.109000
2015-05-11,0.068000
2016-02-11,0.068000
2017-07-13,0.060000
2019-05-13,0.059000
2022-08-11,0.058000
2025-09-12,0.054000
2003-10-10,0.138000
2010-10-13,0.085000
2021-07-12,0.058000
2023-12-11,0.052000
2009-11-12,0.093000
2016-07-11,0.068000
2025-06-12,0.053000
2012-07-12,0.077000
2020-12-11,0.056000
2004-12-13,0.138000