f/overrides/event-backup/dfvex-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
2008-12-10,0.063000
2018-09-27,0.068000
2019-09-27,0.065000
2007-12-19,0.053000
2009-12-09,0.035000
2014-12-16,0.606000
2019-06-27,0.067000
2022-06-29,0.087000
2007-06-08,0.035000
2008-03-10,0.026000
2010-09-08,0.031000
2020-09-29,0.059000
2022-03-30,0.066000
2007-09-10,0.037000
2013-09-10,0.044000
2015-09-09,0.060000
2010-06-08,0.019000
2012-03-08,0.012000
2012-12-13,0.108000
2015-03-09,0.044000
2023-06-29,0.088000
2024-06-27,0.092000
2009-09-09,0.022000
2014-09-09,0.052000
2016-03-30,0.064000
2018-06-28,0.061000
2021-06-29,0.071000
2022-12-14,0.813000
2025-03-28,0.087000
2011-06-08,0.026000
2016-06-29,0.059000
2017-03-30,0.052000
2017-09-28,0.064000
2020-06-29,0.065000
2024-09-27,0.091000
2008-09-09,0.040000
2011-03-08,0.012000
2012-06-08,0.047000
2019-03-28,0.060000
2019-12-17,0.392000
2023-12-13,0.554000
2013-03-08,0.019000
2013-12-12,0.278000
2015-06-08,0.058000
2018-12-18,0.499000
2020-03-30,0.068000
2023-03-30,0.083000
2008-06-10,0.036000
2010-03-09,0.012000
2010-12-09,0.051000
2011-09-08,0.029000
2012-09-10,0.036000
2006-09-08,0.024000
2009-03-10,0.021000
2015-12-16,0.604000
2025-12-15,0.082000
2006-12-18,0.224000
2016-09-29,0.056000
2017-12-15,0.763000
2025-06-27,0.097000
2025-09-29,0.099000
2006-03-08,0.015000
2009-06-09,0.024000
2011-12-13,0.056000
2014-03-10,0.029000
2017-06-29,0.057000
2022-09-29,0.089000
2026-03-30,0.090000
2016-12-15,0.484000
2020-12-16,0.072000
2021-09-29,0.088000
2023-09-28,0.083000
2024-03-27,0.083000
2024-12-13,0.077000
2006-06-08,0.029000
2007-03-08,0.020000
2014-06-09,0.053000
2018-03-28,0.028000
2021-03-30,0.064000
2026-06-29,0.107000
2013-06-10,0.044000
2021-12-15,1.708000