f/overrides/event-backup/kdhax-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
2009-09-23,0.080000
2021-12-15,4.220000
2016-12-15,0.230000
2001-06-22,0.110000
2007-12-14,3.201000
2015-03-24,0.250000
2016-03-23,0.220000
2024-06-21,0.376000
2024-09-23,0.403000
2002-03-21,0.125000
2008-12-16,0.169000
2015-06-23,0.290000
2011-09-23,0.090000
1989-03-21,0.085000
2000-09-22,0.130000
2006-06-23,0.170000
1992-09-24,0.060000
1996-06-13,0.080000
2025-09-23,0.411000
2006-09-22,0.170000
2013-06-21,0.284000
2013-09-23,0.220000
2019-09-23,0.243000
2020-09-23,0.280000
1990-06-25,0.080000
1997-06-19,0.170000
1999-09-23,0.163000
2003-12-17,0.140000
2006-11-15,0.945000
2008-06-23,0.180000
2023-09-22,0.383000
1997-09-23,0.170000
2000-12-21,0.160000
2003-06-23,0.140000
2009-12-16,0.074000
2017-06-23,0.260000
1992-03-25,0.050000
1997-03-20,0.090000
1998-06-23,0.240000
2019-03-22,1.773000
1995-12-18,0.050000
2014-03-24,0.200000
2014-09-23,0.200000
1989-09-25,0.085000
2015-09-23,0.220000
2016-09-23,0.220000
2004-06-23,0.150000
2007-03-23,0.613000
2021-03-24,0.374000
2023-12-15,2.003000
1988-09-30,0.120000
1995-03-27,0.070000
2001-09-21,0.110000
1990-12-26,0.185000
2004-03-24,0.150000
2012-03-23,0.160000
2014-12-16,0.210000
2022-12-15,2.277000
2025-03-24,0.292000
1993-03-24,0.050000
2002-12-18,0.150000
2003-03-24,0.150000
1991-03-26,0.070000
1995-09-18,0.060000
1998-09-23,0.220000
2008-03-24,1.196000
2022-03-24,0.318000
1990-03-23,0.060000
1991-06-25,0.065000
1994-12-23,0.054000
2021-06-23,0.389000
2000-06-23,0.150000
2002-06-21,0.125000
2019-12-16,1.975000
1996-03-14,0.070000
1998-03-24,0.200000
2008-09-23,0.160000
1990-09-24,0.090000
1991-12-24,0.090000
1992-12-29,0.100000
2017-09-22,0.220000
1994-06-24,0.060000
2012-06-22,0.185000
2015-12-15,0.220000
2006-03-24,0.150000
2017-12-15,0.220000
2018-03-22,0.270000
2021-09-23,0.301000
1989-12-22,0.170000
1993-06-25,0.050000
2005-03-24,0.150000
1999-12-21,2.364000
2010-06-23,0.095000
2010-09-23,0.085000
2020-06-23,1.924000
2025-12-15,6.944000
1993-12-23,0.053000
1994-03-25,0.060000
1996-09-18,0.090000
2026-06-23,0.329000
2012-09-21,0.200000
2013-03-21,0.220000
2018-06-22,0.270000
2023-06-23,0.378000
2025-06-23,0.325000
1998-12-22,1.740000
2003-09-23,0.140000
2009-06-23,0.150000
1991-09-27,0.070000
1994-09-26,0.070000
2011-06-23,0.055000
2023-03-24,0.333000
1999-03-24,0.175000
2001-12-20,0.105000
2005-12-20,0.180000
1999-06-23,0.180000
2004-09-23,0.150000
2018-12-17,5.314000
2014-06-23,0.200000
2002-09-23,0.135000
2010-03-24,0.055000
2013-12-16,0.210000
2024-03-21,0.329000
1988-04-15,0.041000
2017-03-24,0.220000
2022-06-23,0.304000
2020-03-24,0.270000
2005-06-23,0.150000
2016-06-23,0.220000
1989-06-22,0.090000
1993-09-24,0.060000
2004-12-16,0.150000
1997-12-22,1.703000
2000-03-24,0.290000
2005-09-23,0.150000
2006-12-15,0.335000
2007-06-22,0.220000
1988-12-15,0.100000
1992-06-24,0.060000
1996-12-18,0.870000
2009-03-24,0.140000
2012-12-17,0.250000
2019-06-21,0.262000
2010-12-15,0.085000
2022-09-23,0.378000
1995-06-26,0.060000
2001-03-23,0.140000
2007-09-21,0.230000
2024-12-16,3.809000
2026-03-24,0.297000
2011-03-24,0.041000
2018-09-21,0.220000
2020-12-15,0.339000
2011-12-15,0.149000