f/overrides/event-backup/fwwfx-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
1995-12-08,0.150000
2002-12-13,0.020000
2022-12-09,1.582000
2023-12-08,0.280000
2025-12-12,4.188000
2003-12-12,0.070000
2009-12-04,0.107000
2020-12-04,2.766000
2024-12-13,5.095000
1990-12-14,0.080000
1997-12-12,1.270000
2000-12-15,2.650000
2021-12-03,4.586000
2023-12-27,0.013000
2019-12-06,1.382000
1998-12-11,0.540000
2006-12-08,2.830000
2009-12-30,0.005000
2011-12-02,0.065000
2012-12-07,0.239000
2017-12-08,1.822000
2016-12-09,0.266000
2007-12-07,2.500000
2010-12-03,0.124000
1992-12-11,0.260000
1993-12-10,0.250000
1996-12-13,0.550000
1999-12-10,1.620000
2004-12-10,0.120000
2005-12-09,1.140000
2013-12-06,2.066000
2014-12-05,2.493000
2018-12-07,2.225000
2010-12-30,0.022000
1991-12-13,0.100000
1994-12-09,0.730000
2008-12-05,0.170000
2015-12-04,0.886000