f/overrides/event-backup/cabdx-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
2013-12-18,0.044000
2017-12-15,0.741000
1986-10-20,0.035000
1989-03-22,0.020000
1989-12-20,0.035000
1990-03-21,0.020000
2001-06-15,0.010000
1981-01-09,0.030000
1982-07-19,0.030000
1982-10-12,0.070000
1989-09-22,0.020000
1991-03-22,0.020000
2002-09-20,0.010000
2004-03-25,0.010000
1982-04-16,0.030000
1986-01-28,0.030000
1989-06-22,0.020000
1990-09-20,0.020000
1996-06-13,0.013000
1997-12-18,0.469000
1994-09-23,0.013000
1998-03-13,0.010000
2008-12-22,0.049000
2025-12-12,0.390000
1985-01-15,0.030000
1985-07-17,0.030000
1991-12-23,0.015000
2003-09-23,0.010000
2004-09-23,0.010000
2005-03-23,0.010000
2019-12-13,0.250000
1983-07-18,0.030000
1987-07-27,0.030000
1998-09-15,0.010000
1999-09-15,0.010000
2002-03-15,0.010000
1985-10-10,0.040000
1992-03-24,0.015000
1999-12-15,0.182000
1987-12-22,0.020000
1997-09-15,0.013000
2022-12-09,0.469000
1987-10-27,0.030000
1998-12-18,0.361000
1999-03-15,0.010000
2001-03-15,0.010000
1991-09-23,0.015000
1988-03-25,0.020000
1984-10-09,0.040000
1987-01-27,0.030000
1993-03-24,0.015000
2003-06-24,0.010000
2016-12-16,0.386000
2020-12-11,0.068000
1987-04-27,0.030000
1990-12-21,0.037000
1992-12-23,0.015000
1993-06-23,0.015000
1994-12-15,0.013000
1997-06-12,0.013000
1984-07-17,0.030000
1986-07-25,0.030000
1999-06-15,0.010000
2018-12-14,0.734000
2024-12-13,0.696000
1983-10-10,0.030000
1984-04-17,0.030000
1995-09-26,0.013000
1995-12-15,0.013000
2001-09-21,0.010000
1998-06-16,0.010000
2007-12-21,0.451000
2010-12-21,0.026000
1984-01-16,0.030000
1990-06-19,0.020000
2005-12-22,0.031000
2006-12-14,0.050000
1983-01-17,0.030000
1996-09-17,0.013000
1980-04-08,0.030000
1991-06-21,0.020000
2002-06-14,0.010000
1983-04-18,0.030000
2000-06-15,0.010000
1980-10-03,0.070000
1981-04-16,0.030000
1988-06-23,0.020000
1993-12-15,0.015000
2003-12-22,0.010000
2011-12-15,0.042000
1992-06-23,0.015000
1994-03-23,0.015000
1994-06-23,0.013000
1996-12-10,0.392000
2000-09-15,0.010000
2000-12-15,0.247000
1981-10-09,0.070000
1982-01-18,0.030000
1988-12-22,0.020000
1995-03-23,0.013000
2003-03-25,0.010000
2004-12-21,0.010000
1981-07-20,0.030000
1993-08-25,0.015000
2012-12-19,0.033000
2023-12-08,0.400000
1980-01-08,0.030000
1980-07-08,0.030000
2001-12-14,0.105000
2002-12-27,0.010000
2009-12-22,0.035000
2014-12-22,0.313000
2015-12-18,0.231000
1985-04-17,0.030000
1988-09-22,0.020000
1992-09-24,0.015000
1996-03-14,0.013000
1997-03-12,0.013000
1986-04-24,0.030000
1995-06-23,0.013000
2000-03-15,0.010000
2004-06-24,0.010000
2021-12-10,0.670000