f/overrides/event-backup/gmxix-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
2021-09-07,0.048000
2023-09-11,0.048000
2025-03-10,0.015000
2002-12-27,0.022000
2011-03-18,0.083000
2013-09-20,0.036000
2025-09-08,0.024000
2023-03-13,0.029000
2016-09-12,0.028000
2021-06-07,0.044000
2001-06-27,0.014000
2001-09-26,0.027000
2002-09-20,0.018000
2018-12-18,2.791000
2007-12-21,0.036000
2012-03-16,0.012000
2017-09-11,0.030000
2019-03-08,0.013000
2016-12-16,1.638000
2018-09-10,0.058000
2019-06-07,0.041000
2006-03-24,0.057000
2009-03-20,0.034000
2015-09-10,0.050000
2008-03-20,0.038000
2017-12-18,2.325000
2005-12-28,0.723000
2020-06-08,0.043000
2009-06-19,0.019000
2010-12-27,0.215000
2026-03-18,0.029000
2003-06-20,0.020000
2004-12-28,0.300000
2002-06-21,0.019000
2003-03-21,0.018000
2007-06-22,0.049000
2007-09-21,0.050000
2008-09-19,0.042000
2011-12-19,1.129000
2000-03-28,0.027000
2001-12-20,0.035000
2008-06-20,0.025000
2018-06-08,0.054000
2023-06-12,0.045000
2025-06-09,0.058000
2016-06-10,0.045000
2022-09-12,0.056000
2000-12-18,0.064000
2009-09-18,0.018000
2022-12-21,1.329000
2013-12-18,0.899000
2004-09-24,0.026000
2014-09-16,0.042000
2017-03-10,0.020000
2003-09-11,0.020000
2014-02-13,0.009000
2006-06-23,0.058000
2016-03-11,0.031000
2020-09-08,0.042000
2015-03-13,0.035000
2024-09-09,0.067000
2012-09-07,0.029000
2014-12-16,1.439000
2005-06-24,0.054000
2019-12-18,0.747000
2013-06-21,0.029000
2020-03-09,0.023000
2020-12-21,0.485000
2022-03-07,0.012000
2000-06-27,0.035000
2000-09-26,0.037000
2004-06-25,0.029000
2005-09-23,0.043000
2010-06-18,0.031000
2022-06-06,0.057000
2026-06-17,0.046000
2021-03-08,0.023000
2002-03-22,0.018000
2012-06-15,0.025000
2018-03-09,0.021000
2025-12-18,1.909000
2007-03-23,0.110000
2009-12-18,0.061000
2006-12-27,0.891000
2014-03-14,0.022000
2017-06-09,0.039000
2023-12-20,1.008000
2024-06-10,0.056000
2008-12-19,0.051000
2012-12-19,0.738000
2015-12-17,2.160000
2018-12-19,0.163000
2007-04-11,0.590000
2019-09-09,0.053000
2021-12-21,2.270000
2013-03-15,0.031000
2014-06-13,0.027000
2003-12-26,0.152000
2004-03-26,0.025000
2005-03-24,0.026000
2010-09-17,0.034000
2024-03-11,0.020000
2024-12-19,1.792000
2006-09-22,0.058000
2015-06-12,0.053000