f/overrides/event-backup/mac-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
1997-08-14,0.407387
1998-08-12,0.425905
2018-08-16,0.740000
2020-08-18,0.150000
2025-03-04,0.170000
1998-02-05,0.425905
2006-05-17,0.629599
2008-11-13,0.740704
2014-11-07,0.650000
2016-11-08,0.710000
2024-08-19,0.170000
2026-06-15,0.170000
2011-11-08,0.550000
2013-05-08,0.580000
2015-05-06,0.650000
2021-02-18,0.150000
2022-08-18,0.150000
2021-08-18,0.150000
2022-11-08,0.170000
1999-11-17,0.472199
2005-02-18,0.601822
2013-02-20,0.580000
2020-02-20,0.750000
2020-11-06,0.150000
2025-12-15,0.170000
1997-05-19,0.407387
2008-05-15,0.740704
2013-11-07,0.620000
2019-08-16,0.750000
2023-11-08,0.170000
1996-11-20,0.407387
1997-11-19,0.425905
2008-02-20,0.740704
2014-08-18,0.620000
2024-02-15,0.170000
1995-05-16,0.388870
1996-08-19,0.388870
2020-04-21,0.100000
2000-02-16,0.472199
2000-11-15,0.490717
2023-05-18,0.170000
2025-06-03,0.170000
1995-08-18,0.388870
2003-05-16,0.527752
2008-08-19,0.740704
2012-05-08,0.550000
2019-02-20,0.750000
1996-02-15,0.388870
2007-05-16,0.657375
2018-11-08,0.750000
2009-11-09,0.059172
2010-11-09,0.500000
2017-08-16,0.710000
2022-02-17,0.150000
2026-03-16,0.170000
2016-05-03,0.680000
1994-11-07,0.370352
2002-02-20,0.509234
2002-11-14,0.509234
2004-11-10,0.601822
2006-02-21,0.629599
2005-11-10,0.629599
2012-02-17,0.550000
2015-08-18,0.650000
2005-05-18,0.601822
2012-08-16,0.550000
2015-02-18,0.650000
1994-05-06,0.064812
1994-08-04,0.370352
1995-02-13,0.370352
1999-05-18,0.449052
2004-02-19,0.564787
2011-08-17,0.500000
2016-02-17,0.680000
2001-05-16,0.490717
2003-02-20,0.527752
2014-05-07,0.620000
2024-11-12,0.170000
2025-09-09,0.170000
2003-08-18,0.527752
2016-08-17,0.680000
2000-08-16,0.472199
2009-02-18,0.740704
2011-02-17,0.500000
1996-05-17,0.388870
1999-02-16,0.449052
2007-11-13,0.740704
2012-11-07,0.580000
2014-02-19,0.620000
2006-11-13,0.657375
2009-08-10,0.058131
2013-08-16,0.580000
2017-02-16,0.710000
2017-11-09,0.740000
2021-11-08,0.150000
2023-08-17,0.170000
1998-11-20,0.449052
2001-08-16,0.490717
2001-11-15,0.509234
2004-08-18,0.564787
2010-02-11,0.060000
2004-05-18,0.564787
2024-05-17,0.170000
2003-11-12,0.564787
2006-08-16,0.629599
2009-05-07,0.057053
2010-05-06,0.500000
2019-05-07,0.750000
2017-05-03,0.710000
2018-05-07,0.740000
2019-11-07,0.750000
2023-02-16,0.170000
1998-05-11,0.425905
1999-08-17,0.449052
2001-02-20,0.490717
2010-08-18,0.500000
2018-02-20,0.740000
2000-05-16,0.472199
2002-05-16,0.509234
2005-08-05,0.601822
2015-11-09,4.680000
2011-05-06,0.500000
2021-05-06,0.150000
2022-05-19,0.150000
1995-11-21,0.388870
1997-02-18,0.407387
2002-08-23,0.509234
2007-02-21,0.657375
2007-08-17,0.657375