f/overrides/event-backup/fidsx-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
2007-12-21,0.566000
2014-12-22,0.155200
2016-12-16,0.099100
2021-04-09,0.011000
2023-04-14,0.147000
1998-04-03,1.023000
2002-12-13,0.070000
2013-04-12,0.007000
2022-04-08,0.624000
2023-12-21,0.211000
2002-04-05,0.012000
1997-12-12,0.750000
1999-12-10,0.396000
2009-12-30,0.003000
2024-04-12,0.079000
1992-06-05,0.083000
1990-12-14,0.052000
2010-04-30,0.002400
2022-12-16,0.592000
1985-06-24,0.029000
2001-12-14,0.228000
2003-04-04,0.009000
2009-12-18,0.040000
1994-04-15,0.039000
2017-12-15,0.340100
1989-06-14,0.023000
1991-12-13,0.035000
1993-12-10,0.685000
1996-04-04,0.167000
2019-12-20,0.605000
1989-12-11,0.029000
1987-12-16,0.166000
1988-12-13,0.081000
1999-04-01,0.177000
2000-12-15,0.248000
2020-12-18,0.170000
1984-06-25,0.008000
1992-12-11,0.306000
2001-04-06,0.239000
2003-12-12,0.085000
1984-01-30,0.001000
1997-04-04,0.365000
2004-12-10,0.860000
2005-12-09,0.397000
2011-12-28,0.000400
2018-04-06,0.271900
2025-12-26,0.873000
1995-12-15,0.128000
1996-12-13,0.352000
1998-12-11,0.077000
2005-04-15,0.587000
2009-04-17,0.022000
2015-12-18,0.136700
2018-12-14,0.847000
1994-12-09,0.433000
1993-04-02,0.067000
2012-12-21,0.074700
2025-04-11,0.272000
1986-07-14,0.020500
2010-12-17,0.018000
2013-12-20,0.067700
2026-04-10,0.228000
2008-12-19,0.116000
2004-04-08,0.166000
2007-04-13,0.133000
2017-04-07,0.146100
2000-04-07,0.177000
2020-04-08,0.426000
2014-04-11,0.010200
2006-12-08,1.060000
2008-04-11,0.019000
2011-12-16,0.013600
2021-12-17,0.525000
2024-12-26,0.820000
2006-04-13,0.379000