f/overrides/event-backup/fdgrx-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
2002-06-07,0.001000
2018-12-26,1.022000
1991-12-20,0.181000
2013-12-06,0.817000
2009-12-11,0.012400
2020-12-29,2.911000
1994-12-16,0.103000
1997-01-03,0.007000
1986-01-13,0.007000
1996-12-13,0.167000
2014-01-10,0.070300
2008-12-30,0.001000
2016-01-15,0.035700
1999-01-08,0.044000
2001-01-05,0.016000
2019-12-27,0.821000
2016-12-27,0.816200
1987-12-16,0.001000
1996-01-05,0.021000
2011-12-16,0.276200
2021-12-28,3.890000
1989-12-19,0.184000
1993-01-08,0.004000
2008-01-11,0.000500
2024-12-26,3.575000
2025-12-26,2.376000
1995-12-15,0.173000
2013-01-11,0.015800
1988-12-30,0.011000
2008-12-12,0.006800
2012-12-14,0.247100
2014-12-05,0.448700
2023-12-26,1.224000
1992-01-10,0.033000
1998-01-02,0.043000
1999-12-17,0.585000
2005-01-07,0.001000
2015-01-16,0.020900
2015-12-04,0.515500
1985-01-07,0.007000
2004-12-17,0.007000
2010-12-30,0.000300
1984-01-16,0.003000
1992-12-18,0.124000
1994-01-07,0.011000
2000-12-22,0.655000
2017-12-26,0.845500
1993-12-17,0.295000
1998-12-18,0.339000
2000-01-07,0.095000
1997-12-26,0.450000
2007-12-14,0.059000
2022-12-27,1.620000