f/overrides/event-backup/dis-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,ctime
1988-07-11,0.0996,2020-04-10 11:13:59
1992-01-06,0.1752,2020-04-10 11:13:59
1992-07-06,0.0525,2020-04-10 11:13:59
2011-12-14,0.6,2020-04-10 11:13:59
2015-12-10,0.71,2020-04-10 11:13:59
1982-03-08,0.00617,2020-04-10 11:13:59
1988-01-12,0.0804,2020-04-10 11:13:59
1996-10-09,0.1101,2020-04-10 11:13:59
2017-07-06,0.78,2020-04-10 11:13:59
1992-10-05,0.0525,2020-04-10 11:13:59
1995-12-29,0.09,2020-04-10 11:13:59
1985-12-09,0.00617,2020-04-10 11:13:59
1997-04-09,0.1326,2020-04-10 11:13:59
1988-10-07,0.0996,2020-04-10 11:13:59
1987-09-16,0.0804,2020-04-10 11:13:59
1989-04-10,0.12,2020-04-10 11:13:59
1993-04-05,0.0624,2020-04-10 11:13:59
1987-06-01,0.0804,2020-04-10 11:13:59
1997-07-09,0.1326,2020-04-10 11:13:59
2019-12-13,0.88,2020-04-10 11:13:59
1997-10-15,0.1326,2020-04-10 11:13:59
1986-03-12,0.0804,2020-04-10 11:13:59
2002-12-11,0.21,2020-04-10 11:13:59
1982-11-29,0.00617,2020-04-10 11:13:59
1989-01-09,0.0996,2020-04-10 11:13:59
1991-07-08,0.1752,2020-04-10 11:13:59
1993-01-05,0.0525,2020-04-10 11:13:59
2016-12-08,0.78,2020-04-10 11:13:59
1983-03-07,0.00617,2020-04-10 11:13:59
1995-07-06,0.09,2020-04-10 11:13:59
1995-10-11,0.09,2020-04-10 11:13:59
1985-05-30,0.00617,2020-04-10 11:13:59
1999-10-07,0.05228,2020-04-10 11:13:59
1982-06-28,0.00617,2020-04-10 11:13:59
2016-07-07,0.71,2020-04-10 11:13:59
1991-10-07,0.1752,2020-04-10 11:13:59
2012-12-06,0.75,2020-04-10 11:13:59
2008-12-11,0.35,2020-04-10 11:13:59
1982-09-27,0.00617,2020-04-10 11:13:59
1996-04-10,0.1101,2020-04-10 11:13:59
1986-09-15,0.0804,2020-04-10 11:13:59
2007-06-13,0.0,2020-04-10 11:13:59
1992-04-06,0.21,2020-04-10 11:13:59
1986-06-02,0.0804,2020-04-10 11:13:59
1983-07-01,0.00617,2020-04-10 11:13:59
1986-12-02,0.0804,2020-04-10 11:13:59
1987-03-09,0.0804,2020-04-10 11:13:59
1988-04-13,0.0996,2020-04-10 11:13:59
1996-07-10,0.1101,2020-04-10 11:13:59
1997-01-08,0.1101,2020-04-10 11:13:59
1983-10-07,0.00617,2020-04-10 11:13:59
2007-12-05,0.35,2020-04-10 11:13:59
2003-12-10,0.21,2020-04-10 11:13:59
1990-01-08,0.12,2020-04-10 11:13:59
1990-07-09,0.1452,2020-04-10 11:13:59
1994-01-04,0.0624,2020-04-10 11:13:59
1994-07-05,0.075,2020-04-10 11:13:59
2013-12-12,0.86,2020-04-10 11:13:59
2017-12-08,0.84,2020-04-10 11:13:59
1998-10-07,0.0525,2020-04-10 11:13:59
1990-04-06,0.1452,2020-04-10 11:13:59
1999-11-12,0.21,2020-04-10 11:13:59
1984-03-08,0.00617,2020-04-10 11:13:59
2000-12-06,0.21,2020-04-10 11:13:59
2019-07-05,0.88,2020-04-10 11:13:59
2009-12-10,0.35,2020-04-10 11:13:59
2015-07-01,0.66,2020-04-10 11:13:59
1994-10-07,0.075,2020-04-10 11:13:59
1983-12-12,0.00617,2020-04-10 11:13:59
1990-10-05,0.1452,2020-04-10 11:13:59
1991-04-08,0.1752,2020-04-10 11:13:59
1998-01-07,0.1326,2020-04-10 11:13:59
1985-09-10,0.00617,2020-04-10 11:13:59
1995-04-07,0.09,2020-04-10 11:13:59
2004-12-08,0.24,2020-04-10 11:13:59
1989-07-10,0.12,2020-04-10 11:13:59
1995-01-03,0.075,2020-04-10 11:13:59
2014-12-11,1.15,2020-04-10 11:13:59
2018-12-07,0.88,2020-04-10 11:13:59
1985-03-05,0.00617,2020-04-10 11:13:59
2001-12-05,0.21,2020-04-10 11:13:59
2018-07-06,0.84,2020-04-10 11:13:59
2006-12-13,0.31,2020-04-10 11:13:59
2010-12-09,0.4,2020-04-10 11:13:59
1993-10-06,0.0624,2020-04-10 11:13:59
1993-07-02,0.0624,2020-04-10 11:13:59
1998-07-22,0.0535127,2020-04-10 11:13:59
2005-12-08,0.27,2020-04-10 11:13:59
1994-04-11,0.075,2020-04-10 11:13:59
1998-04-07,0.1575,2020-04-10 11:13:59
1989-10-06,0.12,2020-04-10 11:13:59
1991-01-14,0.1452,2020-04-10 11:13:59
1984-12-04,0.00617,2020-04-10 11:13:59
1984-06-07,0.00617,2020-04-10 11:13:59
1984-09-13,0.00617,2020-04-10 11:13:59