f/overrides/event-backup/msd-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

132 lines
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Date,Dividends
2021-09-29,0.110000
2024-09-30,0.220000
1998-09-28,0.300000
2010-06-28,0.160000
2021-06-29,0.110000
2012-06-27,0.140000
2019-12-19,0.130000
2004-09-28,0.180000
2004-06-28,0.180000
2005-12-21,0.384000
2013-12-18,0.460000
2016-09-28,0.150000
2022-12-15,0.120000
1995-12-27,0.475000
1998-03-27,0.300000
2007-09-26,0.155000
2020-12-17,0.105000
2003-12-22,0.271000
2007-06-27,0.155000
2015-03-27,0.140000
2022-03-30,0.120000
2026-03-31,0.140000
2011-03-29,0.160000
2014-09-26,0.140000
2008-09-26,0.155000
2013-09-26,0.140000
2020-06-29,0.098000
2024-03-27,0.210000
1998-06-26,0.300000
1999-09-28,0.240000
2009-09-28,0.140000
2013-06-26,0.230000
2014-06-26,0.140000
2014-12-17,0.150000
2018-06-28,0.140000
1994-09-26,0.110000
2001-12-20,0.220000
2004-12-21,0.326000
2008-06-26,0.155000
2017-03-29,0.150000
2017-09-28,0.140000
2024-12-13,0.265000
2025-06-30,0.190000
1997-09-26,0.360000
2000-03-29,0.240000
2015-12-16,0.183000
2026-06-30,0.150000
1996-06-26,0.360000
2002-12-20,0.150000
2016-06-28,0.150000
2024-06-28,0.220000
2000-06-28,0.210000
2008-12-17,0.397000
1997-06-26,0.561000
2001-06-27,0.210000
2017-12-21,0.140000
1994-01-06,0.710000
2004-03-29,0.180000
2019-03-28,0.130000
2022-06-29,0.120000
2023-06-29,0.188000
2001-09-26,0.210000
2012-03-28,0.140000
2011-09-28,0.160000
2016-03-29,0.150000
2003-06-26,0.150000
2020-09-29,0.110000
2025-09-30,0.170000
1995-09-27,0.420000
1998-12-29,0.305000
2019-06-27,0.130000
2006-03-29,0.200000
2009-06-26,0.130000
2016-12-21,0.175000
2022-09-29,0.120000
1996-06-13,0.428000
1997-12-29,0.360000
2009-03-27,0.105000
2012-09-26,0.140000
2018-09-27,0.130000
1998-01-12,2.293000
2002-03-26,0.210000
2008-03-27,0.155000
2021-12-16,0.125000
2006-06-28,0.185000
2006-09-27,0.185000
2023-03-30,0.158000
1994-03-25,0.350000
2003-03-27,0.150000
2018-12-20,0.130000
2000-12-20,0.424000
2009-12-22,0.263000
2005-06-28,0.180000
2007-03-28,0.155000
2015-06-26,0.140000
1994-06-24,0.300000
1996-03-27,0.428000
2012-12-19,0.210000
2013-03-26,0.140000
1999-06-28,0.240000
2011-12-21,0.140000
2010-03-29,0.160000
2023-12-14,0.200000
2002-06-26,0.150000
2019-09-27,0.130000
2007-12-19,0.197000
2021-03-30,0.105000
2025-03-31,0.220000
2025-12-19,0.150000
1993-09-24,0.160000
2002-09-26,0.150000
1999-12-17,0.286000
2006-12-20,0.201000
2011-06-28,0.197000
2014-03-27,0.140000
2023-09-28,0.213000
1997-03-26,0.360000
1999-03-29,0.290000
2005-09-28,0.200000
2010-09-28,0.160000
2010-12-21,0.488000
2015-09-28,0.140000
2018-03-28,0.140000
2020-03-30,0.120000
1996-09-26,0.360000
2000-09-27,0.210000
2005-03-29,0.180000
2017-06-28,0.150000
2001-03-28,0.210000
2003-09-26,0.180000