f/overrides/event-backup/lsgbx-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
2004-12-16,0.457000
2007-08-28,0.052000
2009-02-24,0.036000
2009-05-27,0.033000
2012-11-20,0.035000
1992-04-23,0.250000
2010-08-24,0.007000
2007-09-25,0.055000
2008-03-25,0.063000
2009-09-22,0.055000
2014-04-24,0.034000
2014-10-24,0.033000
2017-01-30,0.010000
2009-10-27,0.057000
2011-07-26,0.048000
2012-06-22,0.038000
2013-08-27,0.036000
1998-12-08,0.990000
1999-11-23,0.426000
2009-08-25,0.028000
2010-12-09,0.172000
2013-05-28,0.037000
2021-12-17,0.723000
1996-12-30,0.680000
2007-07-24,0.350000
2018-12-14,0.106000
2008-09-23,0.063000
2008-11-25,0.064000
2011-02-22,0.051000
1991-10-24,0.050000
2009-12-11,0.105000
2012-08-23,0.034000
2012-10-22,0.038000
1992-07-23,0.250000
1994-07-12,0.140000
2013-03-26,0.036000
2014-03-25,0.035000
2016-10-25,0.018000
2025-12-16,0.017000
1991-12-27,0.250000
2011-03-22,0.054000
2014-11-24,0.032000
2008-05-27,0.061000
2014-12-16,0.221000
2009-04-28,0.017000
2013-11-26,0.036000
2014-07-25,0.037000
2015-11-30,0.020000
2016-01-28,0.016000
2010-11-23,0.047000
2014-02-24,0.031000
1992-12-29,0.020000
1993-10-21,0.050000
2007-11-27,0.056000
2012-02-22,0.048000
1993-07-22,0.060000
2000-11-21,0.042000
2012-07-23,0.033000
2013-06-25,0.031000
2012-09-21,0.013000
2014-01-28,0.033000
2014-05-23,0.035000
2014-08-25,0.034000
1994-04-25,0.140000
1999-12-07,0.673000
2008-01-29,0.046000
2012-01-23,0.037000
2013-07-26,0.034000
2019-12-16,0.187000
2000-12-05,0.598000
2007-12-14,0.165000
2009-03-24,0.031000
1993-12-29,0.250000
2009-01-27,0.047000
2009-11-24,0.054000
1992-10-22,0.250000
2010-06-22,0.030000
2011-06-21,0.048000
2016-12-16,0.035000
2014-06-23,0.036000
2002-12-24,0.619000
2009-07-28,0.059000
2010-07-27,0.010000
2010-10-26,0.051000
2011-09-20,0.051000
2013-02-25,0.035000
2013-10-28,0.040000
1996-09-13,0.067000
2010-03-23,0.050000
2007-10-30,0.055000
2008-02-26,0.055000
2010-05-26,0.050000
2011-08-23,0.050000
2003-12-23,0.605000
2005-12-16,0.776000
2012-05-23,0.041000
2016-11-28,0.013000
2004-11-23,0.050000
2008-06-24,0.063000
2008-10-28,0.061000
2011-10-25,0.053000
2008-04-28,0.059000
2008-07-29,0.065000
2011-05-24,0.050000
1993-04-22,0.130000
2008-08-26,0.062000
2012-04-23,0.046000
2013-01-28,0.032000
2014-09-24,0.022000
2020-12-16,0.909000
2009-06-23,0.016000
2011-04-26,0.051000
2011-11-22,0.055000
2012-03-23,0.044000
2010-09-21,0.050000
2013-12-16,0.316000
1997-12-29,0.807000
2006-12-15,0.447000
2008-12-12,0.448000
2010-01-26,0.053000
2011-12-14,0.208000
2013-04-25,0.034000
2013-09-25,0.033000
2017-12-15,0.036000
1995-12-28,0.775000
2010-02-23,0.052000
2011-01-25,0.049000
2012-12-17,0.053000