f/overrides/event-backup/dnldx-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
2008-12-22,0.214000
2011-03-25,0.008000
2014-12-23,0.133000
1993-12-10,3.300000
1997-09-15,0.560000
2000-03-30,2.616000
2002-10-31,0.001000
2004-12-17,3.060000
2005-12-21,1.852000
2023-03-30,0.239000
1990-12-31,1.550000
1999-12-23,5.810000
2004-01-30,0.037000
2018-03-22,0.845000
1994-12-14,1.930000
1995-12-20,3.050000
2007-12-20,6.630000
2008-03-27,0.065000
2012-12-24,0.418000
1995-08-30,0.120000
1997-12-29,3.680000
1998-09-14,1.168000
2010-12-28,0.080000
1996-12-27,2.985000
2005-03-31,1.704000
2024-03-27,0.675000
2017-03-23,0.662000
2019-03-21,0.081000
2025-03-28,1.122000
1996-09-16,0.085000
2011-12-22,0.052000
2013-03-21,0.018000
2014-03-20,0.015000
2021-03-30,0.812000
2026-03-30,0.433000
1991-12-31,2.967000
1994-09-01,0.750000
2015-03-26,0.009000
2019-12-19,1.429000
2015-12-23,1.717000
2016-03-24,0.416000
2001-12-20,1.338000
2002-06-28,0.001000
2006-03-29,1.006000
2012-03-29,0.015000
2000-12-19,6.550000
2003-12-17,3.947000
2010-03-24,0.025000
1987-03-19,0.070000
2003-03-26,0.003000
2009-12-24,0.206000
2023-12-14,0.711000
2024-12-17,4.564000
2025-12-18,8.106000
2017-12-22,6.400000
2018-12-20,4.515000
2020-03-26,0.545000
2022-03-30,1.864000
1989-12-29,1.465000
1992-12-22,3.070000
1993-09-01,0.110000
2001-03-28,0.244000
2006-12-21,4.390000
2016-12-22,0.182000
2020-12-17,1.062000
2022-12-15,2.460000
1988-12-27,0.220000
2002-03-28,0.041000
2013-12-23,0.282000
2007-03-28,0.780000
2021-12-16,10.171000
1986-03-25,0.010000
1987-12-28,0.103000
1999-03-31,0.120000
2004-03-31,0.724000