f/overrides/event-backup/fdetx-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
2004-12-10,0.160000
2007-12-14,2.019000
2008-12-12,0.095000
2018-12-07,2.074000
1987-12-17,0.010000
1990-08-03,0.040000
1990-12-14,0.016667
1994-12-09,0.384667
2001-12-14,0.100000
2004-12-29,0.005000
2010-12-10,0.056000
2013-12-13,0.095000
1989-08-08,0.010000
1992-08-07,0.252000
1998-12-11,3.160000
1999-12-10,1.540000
2021-12-17,1.117000
2017-12-08,1.123000
1989-12-11,0.127667
2000-12-15,1.880000
2011-12-09,0.072000
2016-12-09,0.437000
1993-12-10,0.156666
2002-12-13,0.090000
2005-12-09,0.316000
2012-12-27,0.001000
2014-12-12,2.492000
2025-12-19,2.857000
1991-08-09,0.229000
1993-08-06,0.116667
2006-12-08,0.910000
2012-12-14,0.132000
1995-12-15,0.178666
1997-12-26,1.220000
2023-12-15,0.901000
1991-12-13,0.130000
2003-12-12,0.080000
2019-12-20,1.196000
2015-12-11,0.789000
2020-12-18,0.748000
2022-12-16,0.978000
2024-12-20,2.142000
1988-12-19,0.020000
1992-12-11,0.118000
1996-12-13,1.000000
2009-12-11,0.077000