f/overrides/event-backup/dfsvx-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
2009-12-09,0.052000
2011-12-13,0.400000
2012-09-10,0.041000
2023-03-30,0.155000
2004-12-20,1.785000
2020-06-29,0.060000
2020-09-29,0.101000
2021-09-29,0.137000
2021-12-15,4.186000
2022-09-29,0.163000
2025-12-15,0.226000
2013-03-08,0.004000
1998-12-21,1.535000
2006-06-08,0.063000
2007-03-08,0.017000
2007-06-08,0.084000
2008-12-10,0.157000
2010-12-09,0.084000
2015-06-08,0.098000
1993-11-16,0.100000
2022-12-14,2.315000
2024-06-27,0.187000
2015-12-16,1.540000
2004-09-08,0.002000
2005-06-08,0.036000
2008-09-09,0.067000
2012-06-08,0.069000
2017-09-28,0.075000
2026-03-30,0.197000
2003-12-22,1.567000
1995-11-27,0.240000
2006-12-18,2.463000
2016-03-30,0.070000
2019-06-27,0.105000
2025-09-29,0.245000
1993-12-15,0.030000
1996-12-27,0.471000
2001-12-17,3.676000
2005-12-19,2.299000
2006-09-08,0.082000
2009-06-09,0.035000
2019-09-27,0.106000
1994-11-28,0.120000
2017-03-30,0.016000
2017-12-15,1.968000
2023-06-29,0.182000
2014-09-09,0.061000
2015-09-09,0.135000
2019-12-17,0.714000
2020-03-30,0.061000
2021-03-30,0.085000
2023-12-13,1.140000
2024-12-13,0.185000
2006-03-08,0.040000
1999-12-20,1.605000
2008-06-10,0.032000
2010-09-08,0.024000
2020-12-16,0.454000
2021-06-29,0.112000
2024-03-27,0.156000
2024-09-27,0.185000
1994-12-28,0.016000
2025-06-27,0.228000
2014-06-09,0.042000
2016-06-29,0.080000
2022-06-29,0.115000
2025-03-28,0.176000
2011-06-08,0.025000
2013-06-10,0.043000
2013-09-10,0.041000
2015-03-09,0.005000
2018-12-18,2.064000
2012-12-13,1.796000
2009-09-09,0.020000
2016-09-29,0.013000
2018-09-27,0.112000
2022-03-30,0.067000
1995-12-27,0.062000
2010-03-09,0.008000
2014-12-16,1.472000
2017-06-29,0.075000
2018-03-28,0.001000
2023-09-28,0.171000
2007-12-19,2.303000
2007-09-10,0.117000
2016-12-15,1.530000
2026-06-29,0.267000
2005-03-08,0.001000
2008-03-10,0.083000
2013-12-12,1.713000
2019-03-28,0.050000
2002-12-16,1.732000
2000-12-18,1.741000
2004-06-08,0.010000
2005-09-08,0.095000
2011-09-08,0.039000
2018-06-28,0.085000
1997-12-22,1.013000