f/overrides/event-backup/fdvlx-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
1999-12-03,0.635000
2004-12-03,0.387000
2006-12-01,0.665000
2014-12-26,0.002900
2017-12-08,0.574100
2018-12-07,1.414000
1997-12-05,0.843000
1984-12-17,0.049000
1998-12-04,0.770000
2001-12-07,0.051000
2007-12-07,0.765000
2009-12-04,0.047300
2011-12-02,0.060500
2013-12-06,0.102800
1980-12-05,0.009000
1996-12-06,0.645000
2005-12-02,0.557000
2008-12-03,0.023500
2019-12-06,0.370000
2021-12-03,1.406000
2022-12-09,0.884000
2025-12-12,1.385000
1981-11-30,0.019000
1989-12-07,0.315000
2000-12-08,0.094000
2010-12-03,0.090000
1988-12-23,0.048000
2000-12-29,0.001000
2003-12-05,0.028000
2020-12-04,0.118000
1983-12-19,0.027000
2014-12-05,0.241800
2024-12-13,2.336000
1993-12-03,0.314000
1990-12-07,0.117000
1991-12-06,0.085000
1994-12-02,0.245000
2002-06-07,0.004000
2012-12-07,0.086200
2012-12-27,0.014900
2015-12-04,1.050500
1985-12-23,0.042000
2023-12-08,0.533000
2021-12-28,0.032000
1992-12-04,0.038000
1995-12-08,0.221000
2002-12-06,0.035000
2002-12-30,0.001000
2009-12-30,0.000500
2016-12-09,0.137900
1987-01-12,0.015000