f/overrides/event-backup/mci-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

166 lines
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Date,Dividends
1988-07-25,0.237500
2005-04-28,0.230000
2012-07-26,0.300000
2015-11-02,0.300000
1992-04-24,0.175000
1996-04-26,0.175000
1997-05-01,0.177500
2000-05-04,0.215000
2001-10-29,0.235000
2001-12-27,0.235000
2006-04-28,0.240000
2008-05-01,0.270000
2010-07-29,0.270000
1987-07-27,0.225000
2002-07-30,0.215000
1991-04-24,0.175000
2022-05-27,0.240000
1989-12-22,0.175000
1996-07-29,0.175000
2002-10-29,0.180000
2004-12-29,0.370000
2010-04-22,0.270000
2014-04-24,0.300000
2019-11-01,0.300000
1993-10-27,0.175000
1997-12-29,0.425000
1988-12-23,0.237500
2010-10-28,0.270000
1987-12-24,0.237500
1988-10-25,0.237500
1991-10-25,0.175000
2001-05-04,0.235000
2009-12-29,0.270000
2017-10-27,0.300000
1990-07-25,0.175000
2001-08-01,0.235000
2021-11-05,0.240000
1989-07-25,0.237500
1989-10-27,0.175000
1994-11-01,0.175000
1997-07-29,0.185000
1998-05-04,0.200000
1999-05-03,0.205000
2007-05-03,0.260000
2025-08-29,0.400000
1994-12-23,0.175000
1996-12-27,0.175000
2000-07-27,0.235000
2008-07-30,0.270000
2014-12-29,0.300000
1990-10-25,0.175000
2003-04-30,0.180000
2008-10-29,0.270000
2011-04-20,0.300000
2022-11-04,0.260000
2006-12-27,0.500000
2020-10-30,0.240000
2025-05-30,0.400000
1986-07-25,0.262500
1998-12-29,0.200000
2003-07-29,0.180000
2006-10-26,0.250000
2008-12-29,0.270000
2017-12-28,0.300000
1988-04-25,0.237500
2004-05-05,0.205000
2007-12-27,0.485000
2013-08-01,0.300000
2023-08-25,0.350000
2024-05-31,0.390000
1992-10-26,0.175000
1998-10-28,0.200000
2024-11-04,0.400000
2024-12-30,0.500000
1990-04-24,0.175000
2003-12-29,0.380000
2004-10-28,0.230000
2005-07-27,0.230000
2006-07-26,0.250000
2009-04-30,0.270000
2011-10-27,0.300000
2012-12-27,0.400000
2018-08-03,0.300000
2018-12-28,0.300000
1986-01-27,0.187500
2013-10-24,0.300000
2013-12-27,0.300000
2020-05-01,0.240000
2026-05-29,0.400000
1995-07-27,0.175000
2013-04-25,0.300000
2017-05-02,0.300000
2018-05-04,0.300000
2019-12-30,0.300000
2024-08-26,0.400000
1986-10-27,0.225000
1987-01-26,0.225000
1990-12-24,0.175000
1991-07-25,0.175000
1995-04-25,0.175000
1995-10-27,0.175000
1999-07-28,0.215000
2010-12-29,0.270000
2012-10-25,0.300000
2014-10-30,0.300000
2015-04-29,0.300000
2019-08-02,0.300000
2021-04-30,0.240000
1986-04-24,0.200000
1993-07-28,0.175000
1994-04-26,0.175000
1996-10-29,0.175000
2002-12-27,0.180000
2003-10-29,0.180000
2005-10-27,0.230000
2020-07-31,0.240000
1985-07-25,0.185000
1992-07-28,0.192500
2015-07-30,0.300000
2020-12-30,0.240000
2021-07-30,0.240000
1987-04-24,0.225000
2000-12-27,0.685000
2007-10-25,0.270000
2022-12-29,0.280000
2025-12-30,0.400000
1995-12-27,0.405000
1998-07-29,0.200000
2000-10-27,0.235000
2018-10-26,0.300000
2022-08-26,0.240000
2023-12-28,0.380000
1991-12-24,0.175000
1999-10-27,0.215000
2002-05-01,0.235000
1997-10-29,0.187500
1999-12-29,0.730000
2011-07-28,0.300000
2011-12-28,0.450000
2012-05-03,0.300000
2016-12-28,0.300000
1987-10-26,0.237500
1992-12-24,0.175000
1993-04-27,0.175000
2005-12-28,0.455000
2009-07-30,0.270000
2015-12-29,0.300000
2016-11-03,0.300000
2023-11-03,0.370000
2009-10-22,0.270000
2023-05-30,0.320000
2025-11-03,0.400000
1994-07-27,0.175000
2004-07-28,0.275000
2007-07-25,0.270000
2014-07-30,0.300000
2017-07-28,0.300000
2021-12-29,0.240000
1985-10-25,0.187500
1989-04-26,0.237500
1993-12-27,0.175000
2016-04-28,0.300000
2016-07-28,0.300000
2019-05-03,0.300000