f/overrides/event-backup/jdeux-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
2007-06-29,0.074000
2017-12-20,0.118000
2018-12-19,0.122000
2021-06-28,0.099000
2023-12-13,0.045000
2004-09-30,0.046000
2007-09-28,0.070000
2013-06-28,0.070000
2017-06-28,0.102000
2019-09-26,0.115000
2020-12-18,0.109000
2011-03-31,0.055000
2024-09-26,0.117000
2016-06-28,0.081000
2012-12-18,0.096000
2013-12-12,1.353000
2015-12-21,0.101000
2021-03-29,0.080000
2016-12-20,0.110000
2022-09-28,0.105000
2023-06-28,0.104000
2019-06-26,0.114000
2005-12-27,0.063000
2008-12-22,0.080000
2010-09-30,0.052000
2011-09-30,0.062000
2020-09-28,0.162000
2023-03-29,0.087000
2024-03-26,0.087000
2003-09-30,0.042000
2010-12-20,0.065000
2018-12-12,2.925000
2003-06-30,0.042000
2019-12-12,0.093000
2021-12-13,4.400000
2015-03-27,0.067000
2011-06-30,0.062000
2022-06-28,0.100000
2013-12-20,0.079000
2005-09-30,0.052000
2008-09-30,0.073000
2015-06-26,0.070000
2022-12-20,0.125000
2008-03-31,0.078000
2009-03-31,0.150000
2024-06-26,0.113000
2007-12-20,0.088000
2009-12-21,0.075000
2018-06-27,0.107000
2019-10-08,2.603000
2012-12-13,0.678000
2016-03-29,0.071000
2026-06-26,0.109000
2009-06-30,0.059000
2015-12-11,0.970000
2019-03-27,0.087000
2006-06-30,0.059000
2021-12-20,0.106000
2026-03-27,0.089000
2005-03-31,0.042000
2012-03-30,0.064000
2014-12-22,0.083000
2017-09-27,0.088000
2024-12-19,0.140000
2025-12-11,2.241000
2025-12-18,0.114000
2014-06-30,0.090000
2015-09-28,0.075000
2017-03-29,0.111000
2010-06-30,0.056000
2014-03-31,0.072000
2014-09-30,0.077000
2020-12-11,0.828000
2025-03-27,0.098000
2004-12-17,0.097000
2007-03-30,0.074000
2021-09-28,0.098000
2022-12-13,0.452000
2004-03-31,0.040000
2013-09-30,0.071000
2003-12-19,0.054000
2006-12-22,0.080000
2012-06-29,0.062000
2012-09-28,0.081000
2013-03-28,0.062000
2014-12-12,1.599000
2009-09-30,0.052000
2018-03-27,0.091000
2020-06-26,0.099000
2024-12-12,2.227000
2025-06-26,0.110000
2004-06-30,0.044000
2005-06-30,0.051000
2006-03-31,0.057000
2006-09-29,0.065000
2008-06-30,0.079000
2019-12-19,0.121000
2020-03-27,0.069000
2023-09-27,0.110000
2025-09-26,0.128000
2010-03-31,0.055000
2011-12-20,0.078000
2016-09-28,0.121000
2018-09-26,0.116000
2022-03-29,0.065000
2023-12-20,0.143000