f/overrides/event-backup/nthex-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

188 lines
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Date,Dividends
1990-02-22,0.350000
2012-02-14,0.100000
2013-11-26,0.115000
1981-02-26,0.350000
1984-08-30,0.365000
1988-11-17,0.430000
2003-08-20,0.130000
1993-02-17,0.250000
1995-05-17,0.240000
2003-02-19,0.150000
2016-05-24,0.070000
2017-11-21,0.090000
2021-11-23,0.060000
2023-08-22,0.040000
1982-08-26,0.355000
1983-02-24,0.360000
1983-11-23,0.365000
2004-08-26,0.140000
2011-11-22,0.110000
2014-11-25,0.140000
2020-08-18,0.050000
1986-11-20,0.365000
1998-05-20,0.240000
2001-05-16,0.220000
2012-08-14,0.110000
2022-11-22,0.050000
1988-08-25,0.370000
1999-08-18,0.240000
2004-05-19,0.150000
2005-02-16,0.130000
2010-02-23,0.100000
2011-08-16,0.130000
2020-02-11,0.050000
1982-11-24,0.355000
1987-11-19,0.365000
1993-05-19,0.250000
1999-05-19,0.240000
2018-11-27,0.050000
2026-05-19,0.035000
1987-02-26,0.365000
1996-11-20,0.280000
2013-05-21,0.090000
2016-08-16,0.070000
1986-08-28,0.365000
1997-05-21,0.240000
2011-05-17,0.090000
2012-05-15,0.090000
2015-02-10,0.110000
2023-02-14,0.050000
1980-05-29,0.335000
1985-02-25,0.365000
2014-05-20,0.110000
2024-02-13,0.050000
1990-11-20,0.350000
1995-08-16,0.240000
1997-08-20,0.240000
2000-02-16,0.250000
2014-08-19,0.135000
2020-11-24,0.070000
1983-08-25,0.365000
1988-05-26,0.370000
1996-08-21,0.240000
2002-02-20,0.180000
2010-05-18,0.100000
2012-11-20,0.110000
2023-05-23,0.050000
1981-08-28,0.350000
1987-09-25,0.365000
1989-08-24,0.370000
2001-11-14,0.210000
2001-08-15,0.210000
1980-11-26,0.345000
1986-05-29,0.365000
1987-05-22,0.365000
1989-05-25,0.370000
1992-05-27,0.280000
1994-05-18,0.250000
1997-11-19,0.240000
2003-05-14,0.120000
2007-08-15,0.150000
2019-02-12,0.050000
1980-02-28,0.335000
1980-08-28,0.340000
2007-02-14,0.130000
2009-02-17,0.100000
2009-08-18,0.090000
2013-08-13,0.075000
2015-08-18,0.090000
2018-08-21,0.050000
1983-05-26,0.360000
1990-08-23,0.350000
1997-02-19,0.240000
1998-08-19,0.240000
1998-11-18,0.457000
2008-05-20,0.130000
2010-11-23,0.130000
2023-11-21,0.040000
2026-02-10,0.040000
1992-08-20,0.280000
2015-11-24,0.095000
1990-05-24,0.350000
2011-02-15,0.090000
2024-05-21,0.050000
1991-05-23,0.330000
1994-11-22,0.240000
2002-08-14,0.130000
2004-02-18,0.140000
2005-08-17,0.140000
2006-11-20,0.150000
2008-11-25,0.160000
1982-05-27,0.355000
1995-02-15,0.240000
1996-02-21,0.240000
1988-02-26,0.370000
1989-11-20,0.380000
1993-08-18,0.250000
2014-02-11,0.110000
2021-05-18,0.050000
2024-08-20,0.040000
2015-05-19,0.090000
2017-02-14,0.070000
2017-05-23,0.070000
2018-02-13,0.060000
2022-08-16,0.040000
2025-08-19,0.040000
1996-05-22,0.240000
2000-08-16,0.250000
2001-02-14,0.230000
2003-11-19,0.180000
2007-11-20,0.170000
1985-11-25,0.365000
1991-11-29,0.310000
1998-02-18,0.240000
2003-12-30,0.020000
2006-05-17,0.130000
2006-08-16,0.120000
2007-05-16,0.130000
2017-08-15,0.070000
2019-05-21,0.050000
2021-02-09,0.050000
2022-05-24,0.050000
2024-11-26,0.065000
2025-02-11,0.040000
1986-02-27,0.365000
1991-02-21,0.350000
1992-02-20,0.280000
1994-02-16,0.250000
1994-08-17,0.240000
2006-02-15,0.130000
2010-08-17,0.140000
2025-05-20,0.040000
1992-11-24,0.270000
1993-11-23,0.250000
2009-05-19,0.090000
2018-05-22,0.060000
2019-08-20,0.050000
2020-05-19,0.050000
2025-11-25,0.055000
2022-02-15,0.050000
1984-02-23,0.365000
1991-08-22,0.310000
1995-11-21,0.270000
1999-11-17,0.365000
2004-11-22,0.130000
2005-11-21,0.205000
2008-08-19,0.130000
2016-11-22,0.085000
1981-05-28,0.350000
1984-05-24,0.365000
1984-11-19,0.365000
1985-05-20,0.365000
1999-02-17,0.220000
2000-05-24,0.250000
2008-02-19,0.130000
2021-08-18,0.050000
1981-12-03,0.350000
1989-02-23,0.370000
1985-08-22,0.365000
2005-05-25,0.140000
2013-02-12,0.090000
1982-02-25,0.350000
2000-11-15,0.310000
2002-11-20,0.160000
2009-11-24,0.100000
2016-02-09,0.080000
2019-11-26,0.080000