f/overrides/event-backup/dfalx-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
1993-12-15,0.013000
2010-03-09,0.037000
2011-12-13,0.155000
2014-06-09,0.332000
2015-09-09,0.102000
2021-09-29,0.179000
1995-12-27,0.017000
2023-06-29,0.365000
2013-06-10,0.305000
2016-06-29,0.268000
2017-06-29,0.277000
2009-03-10,0.043000
2020-12-14,0.115000
2021-06-29,0.270000
2023-03-30,0.045000
2024-09-27,0.211000
1995-11-27,0.165000
2006-11-27,0.070000
2007-11-26,0.115000
2011-09-08,0.104000
2020-09-29,0.114000
2023-09-28,0.160000
2006-03-08,0.019000
2008-12-09,0.107000
2010-06-08,0.238000
2012-09-10,0.077000
2013-09-10,0.093000
2014-12-15,0.126000
2019-03-28,0.086000
2021-12-13,0.270000
2022-06-29,0.271000
2022-12-12,0.125000
2008-10-27,0.043000
2018-09-27,0.111000
1991-12-10,0.078000
1992-12-15,0.100000
2004-06-08,0.177000
2007-06-08,0.345000
2007-12-19,0.394000
2014-09-09,0.110000
2000-12-18,0.265000
2006-09-08,0.129000
2012-03-08,0.057000
2005-03-08,0.030000
2009-09-09,0.047000
2015-03-09,0.035000
2016-09-29,0.064000
2002-12-16,0.213000
2018-03-28,0.043000
2006-06-08,0.280000
2013-12-11,0.134000
2018-06-28,0.314000
1998-12-21,0.258000
2007-03-08,0.028000
2016-03-30,0.095000
2016-12-14,0.139000
2005-09-08,0.085000
2011-03-08,0.056000
2017-03-30,0.061000
2021-03-30,0.102000
2026-03-30,0.047000
2001-12-17,0.225000
1994-11-28,0.540000
2004-12-20,0.149000
2009-06-09,0.231000
2024-06-27,0.328000
2025-03-28,0.074000
2008-03-10,0.044000
2014-03-10,0.166000
2020-03-30,0.088000
2022-09-29,0.174000
2024-03-27,0.069000
1996-12-27,0.292000
2006-12-18,0.052000
2017-09-28,0.104000
2017-12-14,0.168000
2019-06-27,0.319000
1997-12-22,0.247000
2015-06-08,0.312000
2023-12-11,0.284000
2009-12-08,0.160000
2019-09-27,0.128000
2007-09-10,0.127000
2010-12-08,0.148000
2012-12-12,0.170000
2019-12-16,0.148000
2004-09-08,0.074000
2012-06-08,0.286000
2018-12-17,0.145000
2005-06-08,0.210000
2005-12-19,0.131000
2008-09-09,0.095000
2010-04-30,0.027000
2011-06-08,0.304000
2025-06-27,0.355000
2015-12-15,0.128000
2020-06-29,0.153000
2025-12-10,0.392000
1999-12-20,0.374000
2013-03-08,0.039000
2024-12-10,0.242000
1993-11-16,0.142000
2003-12-22,0.257000
1994-12-28,0.240000
2026-06-29,0.387000
2010-09-08,0.072000
2022-03-30,0.090000
2025-09-29,0.252000
2008-06-10,0.420000