f/overrides/event-backup/ajg-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
1994-09-26,0.055000
2026-03-06,0.700000
2022-06-02,0.510000
2008-09-26,0.320000
2009-09-28,0.320000
2010-09-28,0.320000
2016-06-01,0.380000
2016-11-30,0.380000
2017-05-31,0.390000
2025-12-05,0.650000
1989-09-25,0.032500
1999-03-29,0.100000
2003-03-27,0.180000
2013-08-30,0.350000
2018-09-06,0.410000
2019-09-05,0.430000
2024-02-29,0.600000
1988-12-23,0.030000
1993-06-24,0.045000
1997-09-26,0.077500
2000-09-27,0.115000
2003-06-26,0.180000
2014-02-28,0.360000
2005-12-28,0.280000
2012-06-27,0.340000
2024-06-07,0.600000
1996-06-26,0.072500
2010-06-28,0.320000
2023-11-30,0.550000
2023-08-31,0.550000
1993-09-24,0.045000
1996-09-26,0.072500
1999-09-28,0.100000
2000-12-27,0.115000
2004-09-28,0.250000
2008-12-29,0.320000
1992-09-24,0.040000
2002-12-27,0.150000
2013-05-31,0.350000
2015-09-02,0.370000
1989-06-26,0.032500
1994-06-24,0.055000
2007-09-26,0.310000
2015-12-02,0.370000
2016-08-31,0.380000
2022-09-01,0.510000
2012-03-28,0.340000
2013-02-28,0.350000
2015-03-02,0.370000
2024-12-06,0.600000
1999-12-29,0.100000
2002-09-26,0.150000
2008-03-27,0.320000
2019-02-28,0.430000
2020-09-03,0.450000
2023-03-02,0.550000
1995-09-27,0.062500
2005-06-28,0.280000
2007-03-28,0.310000
2014-12-03,0.360000
2017-11-30,0.390000
2021-06-03,0.480000
1991-03-22,0.040000
1992-06-24,0.040000
1996-03-27,0.072500
2006-09-27,0.300000
2007-06-27,0.310000
2011-06-28,0.330000
1995-03-27,0.062500
2004-06-28,0.250000
2010-12-29,0.320000
2024-09-06,0.600000
1992-12-24,0.040000
1997-06-26,0.077500
1998-06-26,0.087500
2002-03-26,0.130000
2023-06-01,0.550000
2025-09-05,0.650000
1990-12-24,0.037500
1993-12-27,0.045000
1995-12-27,0.062500
2001-12-27,0.130000
2008-06-26,0.320000
2022-03-03,0.510000
1992-03-25,0.040000
1998-03-27,0.087500
2001-06-27,0.130000
2005-03-29,0.280000
1994-12-23,0.055000
1995-06-28,0.062500
2025-06-06,0.650000
2010-03-29,0.320000
1990-09-24,0.037500
1998-09-28,0.087500
2000-06-28,0.115000
1991-12-24,0.040000
1998-12-29,0.087500
2006-12-27,0.300000
2017-08-30,0.390000
2004-03-29,0.250000
2009-12-29,0.320000
2015-06-03,0.370000
2018-03-01,0.410000
2020-06-04,0.450000
2003-09-26,0.180000
2003-12-29,0.180000
2011-09-28,0.330000
1991-06-24,0.040000
1991-09-24,0.040000
2013-12-02,0.350000
2026-06-05,0.700000
1994-03-25,0.055000
1999-06-28,0.100000
2004-12-29,0.250000
2007-12-27,0.310000
2012-09-26,0.340000
2021-09-02,0.480000
2000-03-29,0.115000
2018-05-31,0.410000
2020-03-05,0.450000
2021-03-04,0.480000
2025-03-07,0.650000
1990-06-25,0.037500
1996-12-27,0.072500
2006-06-28,0.300000
2009-06-26,0.320000
2019-12-05,0.430000
2020-12-03,0.450000
2019-06-06,0.430000
1989-12-22,0.032500
2011-03-29,0.330000
2014-06-04,0.360000
2014-09-03,0.360000
2017-03-01,0.390000
2018-12-06,0.410000
1989-03-27,0.032500
1990-03-26,0.037500
1997-03-26,0.077500
2002-06-26,0.150000
2009-03-27,0.320000
2011-12-28,0.330000
1993-03-25,0.045000
1997-12-29,0.077500
2005-09-28,0.280000
2006-03-29,0.300000
2016-03-02,0.380000
2022-12-01,0.510000
2001-03-28,0.130000
2001-09-26,0.130000
2012-11-29,0.340000
2021-12-02,0.480000