f/overrides/event-backup/cvsix-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
2005-12-29,0.386000
2007-06-21,0.085000
2015-03-19,0.038000
2017-12-14,0.283000
2018-03-15,0.017000
1991-09-27,0.300000
1992-06-25,0.130000
1999-09-28,0.120000
2000-03-29,0.076000
2008-06-19,0.090000
2010-03-18,0.013000
2016-12-15,0.244000
2018-12-20,0.487000
2021-06-16,0.028000
2022-06-15,0.003000
1993-03-24,0.090000
2005-04-06,0.359000
2010-06-17,0.026000
2012-06-21,0.036000
2016-09-15,0.037000
2001-12-27,0.091000
2003-09-25,0.146000
2005-06-23,0.113000
2013-09-19,0.032000
2018-12-31,0.002000
1996-09-26,0.120000
2013-06-20,0.056000
2023-03-15,0.011000
2025-03-17,0.015000
1999-06-30,0.085000
2007-12-27,0.241000
2011-12-22,0.052000
2017-03-16,0.035000
2021-12-20,0.007000
1994-03-23,0.120000
2001-03-28,0.124000
2004-03-25,0.060000
2012-12-20,0.050000
2014-03-20,0.049000
2019-09-12,0.049000
2019-12-31,0.004000
1990-12-24,0.190000
1996-06-20,0.230000
2020-03-19,0.041000
1995-12-19,0.090000
1997-06-18,0.020000
2014-06-19,0.013000
2017-09-14,0.030000
2024-03-15,0.017000
1993-12-22,0.110000
1999-03-31,0.170000
2011-03-17,0.040000
1997-09-24,0.180000
2009-06-18,0.050000
1997-12-08,0.043000
2001-11-07,0.019000
2019-03-14,0.030000
2023-06-15,0.032000
2023-12-21,0.691000
1995-03-22,0.120000
1995-09-22,0.120000
2002-09-25,0.099000
2015-12-17,0.247000
2018-09-13,0.058000
2025-06-16,0.039000
1998-12-02,0.871000
2007-03-22,0.060000
1991-03-25,0.210000
2021-09-15,0.006000
2022-12-21,0.091000
2025-09-16,0.038000
2026-06-15,0.035000
1992-12-21,0.250000
1994-09-23,0.120000
1996-03-19,0.090000
1997-03-19,0.140000
2001-06-27,0.094000
2006-09-21,0.105000
2024-06-14,0.042000
2000-11-08,0.002000
2003-01-16,0.177000
2006-04-06,0.139000
2011-06-16,0.047000
2016-06-16,0.037000
2019-12-18,0.059000
2024-09-16,0.042000
1998-06-17,0.050000
2001-09-26,0.095000
2014-09-18,0.025000
2018-06-14,0.029000
1992-03-27,0.220000
1999-12-29,0.391000
2003-11-13,0.312000
2004-09-23,0.124000
2004-12-30,0.373000
2009-03-19,0.076000
2012-09-20,0.040000
1993-09-22,0.100000
1994-12-21,0.120000
1995-06-22,0.120000
2010-09-16,0.048000
2019-06-13,0.034000
2023-09-15,0.064000
2002-06-26,0.079000
2008-12-18,0.641000
2010-12-16,0.066000
2003-06-26,0.221000
2009-09-17,0.045000
2003-12-30,0.336000
2014-12-18,0.171000
2015-06-18,0.020000
1991-12-24,0.130000
1998-09-16,0.090000
2002-12-27,0.114000
2007-09-20,0.093000
2002-03-27,0.088000
2006-12-28,0.199000
2026-03-16,0.009000
1993-06-25,0.190000
2003-03-27,0.073000
2013-12-19,0.293000
2016-03-17,0.031000
2000-12-27,0.187000
2002-11-06,0.002000
2020-06-18,0.030000
1991-06-20,0.200000
2004-06-24,0.323000
2025-12-15,0.150000
2005-09-22,0.127000
2008-09-18,0.089000
2013-03-21,0.043000
2022-09-15,0.016000
2024-12-23,0.160000
1998-03-18,0.342000
2006-06-22,0.083000
2012-03-22,0.025000
2015-09-17,0.028000
2017-06-15,0.023000
1992-09-22,0.200000
2000-06-28,0.097000
2004-11-17,0.480000
2009-12-17,0.041000
2011-09-22,0.047000
2020-12-22,0.022000
1996-12-11,0.110000
2000-09-27,0.099000
2008-03-20,0.090000