f/overrides/event-backup/gf-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
1992-12-21,0.180000
2006-12-19,0.055000
2010-12-29,0.065000
2006-05-03,0.150000
2015-05-14,0.080000
1993-08-31,0.210000
2000-11-16,1.310000
2005-12-20,0.410000
2010-04-28,0.054000
2025-05-27,0.019000
2025-12-30,0.130000
1991-08-29,0.070000
1999-11-12,0.370000
2023-12-28,0.057000
2009-04-30,0.018000
2022-12-29,0.043000
2026-05-26,0.154000
2013-12-27,4.481000
1996-12-17,1.400000
1997-11-13,1.980000
2007-05-01,0.340000
2014-05-15,0.803000
2017-12-28,0.743000
1999-11-17,1.070000
2024-12-30,0.048000
1997-08-29,0.340000
1998-11-12,3.660000
2003-12-18,0.022000
2011-12-28,0.545000
2009-12-29,0.160000
2019-05-17,0.313000
2004-12-20,0.230000
2008-12-11,0.127000
2018-12-28,2.939000
2019-12-27,0.204000
2020-05-15,0.341000
1994-12-22,0.160000
2021-12-29,4.919000
2022-05-13,0.725000
2000-08-30,0.420000
2008-05-02,0.059000
2005-05-17,0.140000
1993-12-21,0.210000
2004-05-04,0.050000
2007-12-19,0.255000
2016-12-28,0.796000
2018-05-18,0.715000
1990-11-28,0.260000
2014-12-29,0.369000
2021-05-14,0.915000
2023-05-12,0.014000
2011-05-17,0.040000
2012-12-27,0.633000
2024-05-23,0.024000