f/overrides/event-backup/jensx-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
1994-09-30,0.039000
1998-06-30,0.013000
1998-12-23,0.007000
2006-12-28,0.054000
1993-06-30,0.029000
2002-06-24,0.008000
2006-03-23,0.059000
2009-06-16,0.058000
2024-11-13,6.873000
1995-03-31,0.040000
2003-09-24,0.034000
2008-06-17,0.057000
2012-03-21,0.079000
2022-06-16,0.127000
2025-09-11,0.012000
1997-03-31,0.018000
2009-09-17,0.061000
2016-06-22,0.114000
2023-06-08,0.099000
2025-06-18,0.077000
2000-06-23,0.033000
1999-03-23,0.015000
2016-03-16,0.115000
2022-12-15,1.331000
2024-03-14,0.098000
1995-06-30,0.036000
2014-06-24,0.105000
2018-06-20,0.131000
2019-06-14,0.132000
2010-09-22,0.058000
1999-09-23,0.009000
2004-06-23,0.035000
2005-09-22,0.040000
2017-12-20,1.210000
2019-12-18,3.821000
2020-12-15,5.209000
2024-06-13,0.080000
1995-12-29,0.037000
2003-06-26,0.029000
2011-09-22,0.081000
2012-06-20,0.075000
2013-06-25,0.082000
2017-03-15,0.102000
2001-09-25,0.021000
1999-06-23,0.008000
1999-12-23,0.015000
2015-06-23,0.139000
2015-12-17,3.926000
2020-03-13,0.134000
1998-03-31,0.166000
2017-09-21,0.085000
2023-09-14,0.138000
2018-09-20,0.090000
2010-03-18,0.057000
2010-12-16,0.072000
2001-12-21,0.010000
2025-11-13,16.824000
2021-03-16,0.132000
2014-03-19,0.093000
2005-03-24,0.045000
1997-06-30,0.014000
1997-09-30,0.019000
2007-09-20,0.062000
2010-06-15,0.067000
2017-06-22,0.116000
1992-12-31,0.037000
2004-12-30,0.047000
2020-06-12,0.138000
1995-09-29,0.048000
2008-03-20,0.075000
2019-03-14,0.122000
2006-06-27,0.056000
2026-06-18,0.010000
2008-09-16,0.064000
2018-03-14,0.091000
2018-12-07,4.088000
2022-03-10,0.099000
2023-03-16,0.127000
2006-09-26,0.044000
2001-03-23,0.028000
2004-03-26,0.034000
2012-09-18,0.068000
2022-09-08,0.096000
1993-09-30,0.036000
2021-12-15,4.096000
2016-09-20,0.092000
2000-12-22,0.025000
2005-12-22,0.061000
2013-12-20,1.296000
2021-06-10,0.101000
2021-09-10,0.118000
1996-06-28,0.029000
2002-03-25,0.017000
2008-12-18,0.107000
2009-12-16,0.065000
2014-09-17,0.088000
2020-09-17,0.130000
1998-09-30,0.024000
2000-09-25,0.588000
2007-12-20,0.288000
2009-03-17,0.082000
2011-12-22,0.073000
2013-03-20,0.085000
2013-09-17,0.076000
2015-09-17,0.100000
1993-12-31,0.030000
2025-03-13,0.031000
2007-03-23,0.061000
2008-11-21,0.652000
2005-06-24,0.043000
2011-03-16,0.077000
2015-03-18,0.092000
2023-12-14,4.261000
1993-03-31,0.036000
2011-06-21,0.071000
1994-03-31,0.033000
1997-12-31,0.027000
2000-04-07,2.500000
2007-06-21,0.048000
2012-12-20,0.113000
1996-03-29,0.041000
1994-12-30,0.050000
2004-09-28,0.048000
2010-04-30,0.004000
2019-09-18,0.130000
1994-06-30,0.022000
2002-09-25,0.023000
2003-12-30,0.051000
2014-12-18,1.747000
1996-12-31,0.025000
2000-03-23,0.003000
2024-09-11,0.087000
1996-09-30,0.035000
2002-12-30,0.023000
2003-03-28,0.037000
2016-12-16,1.486000
2001-06-25,0.019000