f/overrides/event-backup/dreqx-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
1999-03-31,0.981000
2002-12-13,0.005000
2024-12-06,0.760000
1987-12-22,1.485000
1990-12-14,0.195000
1991-12-10,0.080000
2009-06-24,0.031000
2000-03-31,0.140000
2001-03-30,0.025000
2003-12-15,0.020000
2025-06-24,1.053000
1982-04-05,0.290000
2016-06-22,0.019000
2018-06-22,0.990000
2003-03-31,0.018000
2006-06-29,0.127000
2025-12-08,2.071000
1989-09-25,0.245000
1999-12-08,0.197000
2002-06-28,0.007000
2022-12-06,0.158000
1997-12-15,0.936000
2011-06-29,0.032000
2020-06-23,0.467000
2023-12-06,0.167000
2026-06-23,1.345000
1993-11-04,1.560000
1996-12-16,1.365000
2006-12-15,0.471000
1988-06-28,0.180000
1994-12-16,0.177000
2012-06-27,0.013000
1983-04-14,0.250000
1985-04-10,0.210000
1995-12-12,1.386000
2002-03-28,0.013000
2021-12-10,1.820000
1991-09-26,0.050000
1992-11-11,0.010000
1993-12-28,1.040000
1998-12-17,0.535000
2008-06-30,0.155000
2014-06-18,0.425000
1984-03-29,0.175000
1986-04-08,1.300000
1995-08-01,0.010000
1990-10-29,0.095000
1997-03-31,0.569000
2015-06-23,0.239000
2004-03-31,0.054000
2007-06-29,0.274000
2010-06-29,0.010000
2013-12-19,0.068000
2017-06-23,0.363000
1987-04-09,1.010000
1989-12-19,1.020000
1994-11-01,1.759000
2017-12-19,1.102000
2021-06-23,1.237000
2022-06-22,1.801000
2013-06-26,0.032000
1992-12-30,0.010000
2005-03-31,0.021000
2007-12-13,0.686000
2001-12-13,0.008000
2014-12-18,0.611000
2018-12-17,1.494000
2019-06-20,0.461000
2023-06-22,0.440000
1980-04-07,0.175000
1986-12-17,1.500000
2000-12-06,0.345000
1981-04-01,0.140000
1988-12-20,0.260000
2015-12-17,0.707000
2019-12-17,1.043000
2020-12-10,1.174000
2004-12-20,0.033000
2012-12-19,0.018000
2016-12-19,0.760000