f/overrides/event-backup/iim-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

392 lines
7.6 KiB
Plaintext

Date,Dividends
1997-05-07,0.065000
1998-06-03,0.065000
1999-05-05,0.070000
2006-10-04,0.058000
2007-10-03,0.058000
2024-12-17,0.077000
1996-09-04,0.062000
2004-01-07,0.078000
2004-07-07,0.078000
2005-06-01,0.068000
2005-08-03,0.068000
2015-04-09,0.070000
2024-02-15,0.050000
1997-09-03,0.065000
1996-12-04,0.065000
2003-09-03,0.075000
2009-04-15,0.068000
2009-12-16,0.073000
2015-09-10,0.070000
1994-04-04,0.075000
2011-03-11,0.073000
2016-10-12,0.062000
2018-12-13,0.059000
2026-05-14,0.077000
2002-10-02,0.075000
2003-10-01,0.078000
2013-01-10,0.075000
2018-04-16,0.062000
2020-12-14,0.062000
2002-03-06,0.068000
2004-02-04,0.078000
2004-12-08,0.068000
2001-03-07,0.065000
1997-02-05,0.065000
2002-04-03,0.068000
2009-02-18,0.060000
2010-04-21,0.073000
2014-02-12,0.075000
2014-05-08,0.075000
2022-11-14,0.051000
1994-08-01,0.075000
2026-03-16,0.077000
2003-03-05,0.075000
2006-07-05,0.068000
2010-05-19,0.073000
2015-11-12,0.070000
2018-11-09,0.059000
2003-02-05,0.075000
1996-02-07,0.062000
2000-03-01,0.073000
2008-06-18,0.058000
2010-07-21,0.073000
2011-10-12,0.075000
1994-03-07,0.075000
2009-01-21,0.060000
2010-11-17,0.073000
2016-09-12,0.062000
2020-10-14,0.062000
2022-02-14,0.064000
2023-05-12,0.046000
2000-08-02,0.073000
1999-11-03,0.073000
2003-08-06,0.075000
2004-11-03,0.068000
2020-02-13,0.056000
1997-01-08,0.065000
2007-08-01,0.058000
2011-01-12,0.073000
2016-03-10,0.070000
2016-05-11,0.070000
2017-08-09,0.062000
1999-08-04,0.070000
2001-05-02,0.065000
2010-03-17,0.073000
2017-02-13,0.062000
1999-07-07,0.070000
2001-10-03,0.065000
2005-04-06,0.068000
2013-10-09,0.075000
2021-07-13,0.064000
1994-07-01,0.075000
2017-04-11,0.062000
2017-09-12,0.062000
2018-08-13,0.062000
2020-05-14,0.056000
2022-09-14,0.054000
2023-11-14,0.044000
2024-04-15,0.050000
2010-08-18,0.073000
2024-06-18,0.077000
2005-09-07,0.068000
2006-03-01,0.068000
2021-10-13,0.064000
2022-05-13,0.063000
2024-03-14,0.050000
2025-01-17,0.077000
2025-06-17,0.077000
1996-07-02,0.062000
2013-04-09,0.075000
2014-09-11,0.075000
1999-03-03,0.070000
2000-09-06,0.073000
2000-10-04,0.065000
2004-09-01,0.078000
2005-10-05,0.068000
2007-02-07,0.058000
2012-04-11,0.075000
2014-01-13,0.075000
1997-08-06,0.065000
2024-08-16,0.077000
2024-07-16,0.077000
1994-06-06,0.075000
2006-02-01,0.068000
2006-04-05,0.068000
2013-02-07,0.075000
2014-08-07,0.075000
2019-03-12,0.059000
2021-03-12,0.064000
1993-06-07,0.075000
2025-07-16,0.077000
2025-04-16,0.077000
2006-05-03,0.068000
2008-11-19,0.060000
2012-06-13,0.075000
2021-05-14,0.064000
2022-03-14,0.064000
2025-02-18,0.077000
1997-11-05,0.065000
2007-05-02,0.058000
2017-05-10,0.062000
2025-09-16,0.077000
1997-04-02,0.065000
2009-10-21,0.068000
2010-09-15,0.073000
2013-11-06,0.075000
2014-04-10,0.075000
2017-01-17,0.062000
2000-06-07,0.073000
2006-06-07,0.068000
2009-11-18,0.073000
2024-05-15,0.050000
2001-09-05,0.065000
2000-04-05,0.073000
2003-12-03,0.078000
2007-12-05,0.075000
2008-07-16,0.058000
2016-11-09,0.062000
2023-08-14,0.046000
1998-01-07,0.065000
2003-07-09,0.075000
2018-06-12,0.062000
2019-01-15,0.059000
2022-12-14,0.051000
1999-10-06,0.073000
1994-01-03,0.075000
2003-04-02,0.075000
2003-06-04,0.075000
2004-03-03,0.078000
2007-01-03,0.058000
2009-06-17,0.068000
2016-12-12,0.062000
1993-11-01,0.075000
2019-11-12,0.059000
2020-08-13,0.060000
2021-08-13,0.064000
2018-05-14,0.062000
2000-02-02,0.073000
2001-06-06,0.065000
2003-01-08,0.075000
2005-07-06,0.068000
2012-12-12,0.075000
2015-10-13,0.070000
2023-09-14,0.044000
1998-08-05,0.065000
1998-03-04,0.065000
2006-11-01,0.058000
2010-02-17,0.073000
2021-04-13,0.064000
2022-08-12,0.059000
2023-01-13,0.051000
1996-11-06,0.065000
2020-07-14,0.056000
1998-09-02,0.065000
2008-01-09,0.115000
2013-03-07,0.075000
2013-09-11,0.075000
2026-07-14,0.077000
2002-06-05,0.068000
2004-05-05,0.078000
2009-03-18,0.060000
2015-07-09,0.070000
1994-09-02,0.075000
2005-11-02,0.068000
2008-03-05,0.058000
2009-08-19,0.068000
2011-06-13,0.073000
2012-09-14,0.075000
2016-01-13,0.070000
2018-02-14,0.062000
1995-09-06,0.195000
2019-09-17,0.059000
2025-12-16,0.077000
2018-10-15,0.059000
2012-11-13,0.075000
2016-07-11,0.070000
2026-08-17,0.077000
1996-06-05,0.062000
2002-11-06,0.075000
2003-11-05,0.078000
2005-02-02,0.068000
2010-01-20,0.073000
2010-10-20,0.073000
2011-11-14,0.075000
2021-12-13,0.064000
2000-07-05,0.073000
2026-02-17,0.077000
2026-04-14,0.077000
2024-09-17,0.077000
2002-12-04,0.075000
2022-06-14,0.063000
1999-06-02,0.070000
1998-12-02,0.070000
2002-01-02,0.068000
2002-08-07,0.068000
2024-11-15,0.077000
1998-10-07,0.070000
1993-10-04,0.075000
1994-02-07,0.075000
1996-08-07,0.062000
2002-09-04,0.068000
2007-04-03,0.058000
2008-02-06,0.058000
2012-08-13,0.075000
1993-05-03,0.075000
2019-04-11,0.059000
2015-02-11,0.070000
1995-10-04,0.065000
2001-08-01,0.065000
2008-05-21,0.058000
2012-10-10,0.075000
1993-09-03,0.075000
2015-05-11,0.070000
2023-12-14,0.044000
1996-04-02,0.062000
1998-07-08,0.065000
1999-02-03,0.070000
2001-12-05,0.068000
2013-06-11,0.075000
2013-08-08,0.075000
2017-07-12,0.062000
2018-09-13,0.059000
1993-12-06,0.085000
2023-06-14,0.046000
2021-01-14,0.064000
2018-03-14,0.062000
2020-04-14,0.056000
2023-02-14,0.049000
2000-12-06,0.065000
2004-06-02,0.078000
2009-05-20,0.068000
2010-12-15,0.073000
2015-03-11,0.070000
2025-05-16,0.077000
1999-04-07,0.070000
1998-11-04,0.070000
2008-12-17,0.166000
2013-12-10,0.075000
2019-08-13,0.059000
1997-11-25,0.065000
1995-12-06,0.060000
2026-06-15,0.077000
1993-07-02,0.075000
2011-12-13,0.075000
2012-02-13,0.075000
2012-05-11,0.075000
2014-06-11,0.075000
2022-07-14,0.059000
2026-01-15,0.077000
1999-12-01,0.073000
2016-02-10,0.070000
2016-08-10,0.070000
2021-09-13,0.064000
2022-01-14,0.064000
2000-05-03,0.073000
2014-10-14,0.075000
2014-12-12,0.075000
2019-05-14,0.059000
1997-06-04,0.065000
2001-11-07,0.068000
2005-05-04,0.068000
2023-03-14,0.049000
2001-01-03,0.065000
2001-07-03,0.065000
2017-12-12,0.062000
2001-02-07,0.065000
1997-10-01,0.065000
1998-04-01,0.065000
2002-07-02,0.068000
2014-03-12,0.075000
2014-11-12,0.075000
2020-01-14,0.059000
2020-11-12,0.062000
1994-05-02,0.075000
2025-08-18,0.077000
2021-06-11,0.064000
2000-11-01,0.065000
1994-10-03,0.075000
1998-05-06,0.065000
1999-01-06,0.070000
2012-07-12,0.075000
2017-06-12,0.062000
2017-11-14,0.062000
2021-02-11,0.064000
1996-05-01,0.062000
2011-07-13,0.073000
2025-11-17,0.077000
1995-11-08,0.062000
2012-01-12,0.075000
2004-08-04,0.078000
2008-09-17,0.058000
2009-09-16,0.068000
2013-07-09,0.075000
2015-06-09,0.070000
2018-07-16,0.062000
2020-09-14,0.060000
2002-05-01,0.068000
2025-03-17,0.077000
2007-03-07,0.058000
2007-06-06,0.058000
2008-08-20,0.058000
2008-10-22,0.050000
2011-02-11,0.073000
2012-03-12,0.075000
2015-08-11,0.070000
1996-10-02,0.062000
2023-04-14,0.046000
2016-06-09,0.070000
2000-01-05,0.073000
2001-04-04,0.065000
2011-04-13,0.073000
2015-12-09,0.070000
2019-12-12,0.059000
1998-02-04,0.065000
2006-12-06,0.119000
2009-07-22,0.068000
2011-05-11,0.073000
2015-01-12,0.075000
2022-04-14,0.063000
2024-10-16,0.077000
1997-12-03,0.065000
1997-07-09,0.065000
1999-09-01,0.070000
2004-10-06,0.068000
2005-01-05,0.068000
2011-09-13,0.075000
2016-04-11,0.070000
2017-10-12,0.062000
1993-08-02,0.075000
2020-03-16,0.056000
2020-06-15,0.056000
2019-10-15,0.059000
2006-01-04,0.068000
2023-07-14,0.046000
2005-03-02,0.068000
2004-04-14,0.078000
2007-07-03,0.058000
2014-07-10,0.075000
2017-03-13,0.062000
2018-01-23,0.062000
2019-07-16,0.059000
2022-10-14,0.054000
1996-03-06,0.062000
2007-09-05,0.058000
2007-11-07,0.058000
2008-04-16,0.058000
2010-06-16,0.073000
2013-05-09,0.075000
2019-06-13,0.059000
2021-11-12,0.064000
2002-02-06,0.068000
2023-10-13,0.044000
1997-03-05,0.065000
2003-05-07,0.075000
2005-12-07,0.068000
2006-09-06,0.068000
2011-08-11,0.075000
2019-02-12,0.059000
2024-01-16,0.044000
1996-01-10,0.062000
2025-10-16,0.077000