f/overrides/event-backup/fdcax-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
1989-04-21,0.020000
1998-12-30,0.010000
2003-12-05,0.030000
2024-12-13,7.730000
2015-12-04,4.275000
2020-12-04,3.499000
1989-12-19,1.410000
1997-12-05,2.930000
2008-12-05,0.184000
2011-12-02,0.033000
2012-12-07,0.737000
1989-09-15,0.030000
1992-12-11,0.780000
2004-12-03,1.220000
2010-12-03,0.020000
2013-12-06,3.641000
2019-12-06,4.572000
2023-12-08,1.323000
1988-12-12,0.130000
1990-12-07,0.180000
1991-12-06,2.750000
2009-12-30,0.002000
2012-12-27,0.020000
2017-12-08,4.006000
1993-02-05,0.040000
1994-02-04,0.390000
2000-12-08,2.280000
2011-12-28,0.010000
2009-12-04,0.020000
2014-12-05,4.158000
2016-12-09,1.779000
2018-12-07,3.943000
1993-12-10,1.120000
1995-12-08,1.400000
1998-12-04,0.540000
2006-12-08,1.450000
2021-12-03,7.398000
2025-12-12,3.675000
1994-12-09,1.630000
1996-12-06,1.660000
1999-12-03,2.060000
2007-12-07,2.340000
1987-12-11,0.840000
2005-12-09,2.460000
2022-12-09,2.971000