f/overrides/event-backup/anefx-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
2005-11-18,0.036000
2007-02-20,0.036000
2003-07-18,0.038000
2008-06-20,0.036000
2011-12-21,0.117000
2019-12-18,3.356000
1991-12-13,0.095000
1999-06-18,0.040000
1986-12-04,0.190000
2008-09-19,0.036000
2009-02-19,0.036000
2021-12-15,4.672000
2004-06-18,0.037000
2008-12-19,0.037000
1992-12-01,0.040000
1998-12-22,2.640000
2003-09-19,0.037000
2004-02-19,0.038000
2005-10-20,0.036000
2009-01-20,0.037000
2015-12-22,2.216000
2005-06-17,0.036000
2025-12-16,7.214000
2008-11-20,0.036000
2017-12-22,3.697000
2018-12-19,3.883000
1996-05-17,0.050000
2004-04-19,0.037000
2005-02-18,0.037000
1987-07-16,0.050000
1995-05-26,0.050000
1996-12-13,1.220000
2005-03-18,0.036000
2013-12-26,2.526000
1995-12-18,0.140000
2003-03-19,0.040000
2004-10-19,0.037000
2005-01-21,0.037000
2008-05-20,0.035000
2009-11-19,0.037000
2020-12-16,1.470000
1989-06-02,0.050000
2000-12-14,2.925000
2003-05-19,0.040000
2006-07-20,0.036000
2007-11-19,0.035000
1991-05-31,0.050000
2004-07-19,0.037000
2005-07-18,0.036000
2007-05-18,0.036000
1997-12-15,1.800000
2006-01-19,0.037000
2014-12-26,3.225000
1988-12-09,0.185000
1990-12-14,0.210000
2003-06-19,0.038000
2004-11-19,0.037000
2007-12-20,0.036000
2010-12-28,0.173000
2024-12-17,5.862000
1997-05-22,0.050000
2003-10-17,0.037000
2006-02-21,0.036000
2009-10-20,0.037000
2006-05-19,0.036000
2009-08-20,0.037000
2023-12-13,2.137000
2005-08-19,0.036000
2009-03-19,0.038000
2009-04-20,0.038000
1994-12-20,0.130000
2003-04-17,0.040000
2005-04-20,0.036000
2006-06-19,0.036000
2006-10-19,0.036000
2007-12-26,2.355000
2008-01-22,0.036000
2008-02-20,0.036000
2009-05-20,0.038000
2004-03-19,0.037000
2006-11-20,0.036000
1987-12-11,0.140000
2003-08-19,0.037000
2004-05-19,0.037000
2005-12-16,0.036000
2008-08-20,0.036000
1992-05-29,0.040000
2004-08-19,0.037000
2005-09-16,0.036000
2007-08-20,0.035000
2008-04-21,0.035000
2009-07-20,0.037000
1988-06-03,0.050000
1993-05-14,0.035000
1999-12-14,3.320000
2007-04-19,0.036000
2007-06-19,0.035000
2007-10-19,0.035000
2009-06-19,0.037000
2008-07-21,0.036000
1993-12-14,0.075000
1994-05-27,0.040000
1998-06-05,0.040000
2003-12-19,0.038000
2006-12-21,0.036000
2007-03-19,0.036000
2007-09-20,0.035000
2008-10-20,0.036000
2012-12-27,1.050000
2006-03-20,0.036000
2007-01-19,0.036000
2009-12-21,0.037000
2004-09-17,0.037000
2004-12-17,0.037000
2005-05-20,0.036000
2006-08-18,0.036000
2006-09-20,0.036000
1989-12-08,0.240000
2004-01-16,0.038000
2008-03-20,0.035000
1990-06-01,0.050000
2003-11-19,0.037000
2006-04-20,0.036000
2007-07-19,0.035000
2009-09-21,0.037000
2016-12-23,0.804000