f/overrides/event-backup/jhs-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
2023-12-08,0.128000
2025-09-12,0.142000
1996-03-20,0.305000
1999-06-17,0.273000
2003-09-03,0.230000
2008-12-11,0.267000
2011-09-08,0.290000
2013-06-11,0.259000
1989-03-14,0.367000
1995-12-20,0.310000
2018-12-12,0.209000
2010-06-09,0.303000
2021-06-10,0.195000
1987-01-12,0.368000
1992-09-21,0.342000
2004-03-17,0.310000
2011-12-08,0.305000
2017-09-08,0.193000
1989-12-12,0.367000
1991-09-10,0.367000
1992-03-16,0.350000
1999-03-18,0.272000
2000-06-15,0.265000
2003-05-28,0.228000
2019-09-12,0.155000
1988-06-14,0.367000
1988-12-13,0.382000
2007-03-26,0.223000
2018-06-08,0.177000
1990-12-11,0.367000
1991-03-13,0.367000
2017-06-08,0.200000
2017-12-08,0.218000
2022-12-29,0.124000
1996-09-19,0.305000
1998-09-17,0.282000
2002-03-06,0.233000
2010-09-09,0.292000
2017-03-09,0.198000
1989-09-12,0.367000
1997-12-19,0.300000
2012-09-12,0.254000
2014-03-11,0.219000
1996-12-19,0.305000
2010-12-09,0.282000
2011-06-09,0.275000
1995-06-21,0.315000
2009-12-09,0.291000
2007-06-13,0.230000
2009-03-10,0.260000
2010-03-09,0.276000
2025-03-13,0.132000
2000-12-20,0.265000
2005-09-21,0.245000
2001-09-20,0.260000
1987-07-13,0.368000
1994-09-20,0.320000
2012-06-07,0.273000
2013-12-10,0.282000
2021-09-10,0.191000
2023-03-10,0.091000
2024-03-08,0.110000
1993-03-22,0.335000
2000-03-16,0.270000
2015-03-10,0.220000
2019-12-11,0.220000
1988-09-13,0.382000
1997-03-19,0.302000
2020-12-10,0.300000
2024-06-13,0.116000
1994-12-19,0.320000
2015-12-09,0.219000
2011-03-09,0.287000
2023-09-08,0.087000
1988-03-15,0.367000
2008-03-19,0.255000
1995-09-20,0.315000
1997-06-18,0.300000
2003-12-17,0.534000
2014-06-10,0.231000
2024-09-13,0.113000
1990-09-11,0.367000
1991-12-10,0.358000
2020-09-10,0.186000
2022-12-09,0.138000
2023-06-09,0.099000
2004-06-23,0.310000
2005-03-16,0.280000
2014-12-09,0.241000
2022-09-09,0.122000
1987-04-10,0.368000
2002-05-30,0.240000
2009-06-09,0.279000
2004-12-22,0.275000
2006-03-15,0.245000
1995-03-20,0.315000
1998-06-18,0.288000
2007-12-12,0.233000
2009-09-09,0.320000
1987-10-09,0.368000
1992-12-21,0.335000
2026-06-11,0.154000
1989-06-13,0.367000
2018-03-09,0.174000
2008-06-09,0.288000
2008-09-12,0.299000
2016-03-09,0.200000
1993-09-20,0.330000
2001-11-28,0.250000
2001-05-30,0.255000
2005-12-14,0.243000
2006-06-14,0.228000
2006-09-20,0.233000
1990-03-13,0.367000
1994-03-21,0.393000
2020-03-11,0.140000
2020-06-10,0.205000
2022-03-10,0.178000
1997-09-19,0.300000
1999-12-16,0.278000
2019-06-12,0.150000
2012-12-11,0.309000
2013-03-07,0.230000
2005-06-15,0.260000
2022-06-10,0.168000
2024-12-12,0.202000
1990-06-12,0.367000
1993-06-21,0.335000
2013-09-11,0.229000
2014-09-10,0.222000
2016-12-08,0.218000
2021-12-10,0.452000
1991-06-11,0.367000
1998-03-19,0.295000
2004-09-22,0.290000
2007-09-19,0.235000
2012-03-08,0.264000
2019-03-08,0.152000
2021-03-10,0.197000
2025-06-12,0.144000
1992-06-22,0.347000
2003-03-05,0.228000
2002-09-04,0.225000
2002-11-26,0.218000
2015-06-09,0.218000
2016-09-08,0.211000
1996-06-19,0.305000
1999-09-16,0.278000
2001-03-08,0.258000
2015-09-09,0.218000
2018-09-13,0.171000
1994-06-20,0.320000
2000-09-20,0.270000
1998-12-17,0.270000
2006-12-13,0.221000
2016-06-09,0.221000
2025-12-11,0.183000
2026-03-12,0.138000
1987-12-11,0.390000
1993-12-17,0.320000