f/overrides/event-backup/indzx-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
2001-09-27,0.059000
2009-06-24,0.036000
2016-03-23,0.044000
2019-12-13,0.649000
2006-03-29,0.035000
1992-06-25,0.075000
1994-03-28,0.067000
1996-12-27,0.683000
1999-09-22,0.019000
2014-03-19,0.039000
2024-09-20,0.059000
1996-03-28,0.058000
2003-06-20,0.036000
2008-09-25,0.042000
2012-06-25,0.053000
2013-06-24,0.050000
2023-03-20,0.056000
2025-09-19,0.036000
1998-06-25,0.051000
1998-09-24,0.046000
2001-12-20,0.508000
2007-09-24,0.044000
2011-03-24,0.032000
2012-03-23,0.038000
2016-09-22,0.034000
2024-06-21,0.057000
2002-06-21,0.033000
2006-12-20,1.216000
2014-12-10,1.141000
2001-03-27,0.028000
2004-06-23,0.035000
2008-12-17,0.041000
2017-09-21,0.034000
1995-06-27,0.061000
1999-12-22,0.880000
2000-06-21,0.032000
2000-12-20,0.042000
2026-03-19,0.025000
2023-09-21,0.060000
1992-03-27,0.066000
1992-09-24,0.068000
1997-12-26,1.081000
2012-12-18,0.065000
2010-12-16,0.025000
2021-06-18,0.045000
2022-12-13,1.182000
1995-03-29,0.068000
2001-06-27,0.025000
2002-12-20,0.027000
2006-06-27,0.040000
1999-03-24,0.039000
2014-09-19,0.037000
2026-06-18,0.034000
2025-06-20,0.048000
2015-12-14,1.475000
2016-12-14,0.292000
2022-06-21,0.053000
2023-06-21,0.069000
2017-06-21,0.034000
2017-12-13,0.880000
1998-12-22,0.982000
2014-06-20,0.045000
1991-06-25,0.091000
2007-12-17,1.273000
2024-12-12,1.334000
1993-09-24,0.064000
1996-09-26,0.074000
2005-06-28,0.035000
2018-12-13,1.281000
2019-09-20,0.053000
2022-09-21,0.062000
2024-03-20,0.061000
1990-12-27,0.053000
1993-12-29,0.072000
2012-09-25,0.053000
2013-09-24,0.028000
2010-03-22,0.028000
1994-09-27,0.064000
1997-09-26,0.103000
2003-09-19,0.024000
2005-09-28,0.038000
2007-06-25,0.045000
2011-06-23,0.038000
2019-03-20,0.048000
2022-03-18,0.047000
1997-06-27,0.081000
2003-12-19,0.025000
2018-03-21,0.041000
2011-12-16,0.038000
2020-09-22,0.041000
1994-06-28,0.071000
2002-09-20,0.027000
2005-03-28,0.036000
2009-03-25,0.033000
1995-12-28,0.061000
1996-06-27,0.065000
2004-09-23,0.040000
2010-09-22,0.026000
2013-12-17,0.047000
2020-03-20,0.052000
2000-03-23,0.026000
2004-12-22,0.045000
2008-03-27,0.006000
2010-06-21,0.028000
1992-12-29,0.073000
2015-06-18,0.063000
2025-03-20,0.042000
1994-12-29,0.097000
2006-09-27,0.042000
2015-03-18,0.046000
2015-09-17,0.060000
2020-12-11,0.049000
2021-09-21,0.048000
2023-12-13,0.703000
1991-12-27,0.094000
1999-06-23,0.029000
2016-06-23,0.043000
2017-03-22,0.035000
2002-03-21,0.028000
2007-03-26,0.044000
2018-06-21,0.044000
1998-03-26,0.052000
2005-12-22,0.611000
2009-09-24,0.034000
2011-09-23,0.030000
2019-06-17,0.053000
2020-06-17,0.055000
1993-03-25,0.065000
1997-03-27,0.085000
2004-03-23,0.035000
2009-12-17,0.041000
2021-12-14,0.966000
1991-09-26,0.082000
2000-09-21,0.024000
2008-03-11,0.395000
2008-06-26,0.043000
1991-03-26,0.070000
1993-06-25,0.078000
2013-03-22,0.041000
2021-03-18,0.045000
2018-09-21,0.050000
1995-09-27,0.066000
2003-03-21,0.034000
2025-12-11,1.210000