f/overrides/event-backup/dffgx-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
2018-12-17,0.049000
2019-06-27,0.054000
2005-12-19,0.130000
2008-06-10,0.063000
2016-03-30,0.027000
2017-03-30,0.028000
2020-03-30,0.026000
1989-12-12,0.467000
2008-12-10,0.099000
2012-09-10,0.025000
2016-12-14,0.059000
2023-06-29,0.066000
1988-06-08,0.145000
1997-12-22,0.346000
2010-06-08,0.065000
2012-03-08,0.018000
2015-12-15,0.072000
2013-03-08,0.014000
2013-12-11,0.047000
2022-12-12,0.058000
1993-06-08,0.176000
1994-06-08,0.194000
1998-06-09,0.216000
2000-06-08,0.232000
2006-09-08,0.116000
2021-06-29,0.003000
2022-09-29,0.060000
2001-06-08,0.207000
2002-12-16,0.241000
2006-06-08,0.110000
2010-03-09,0.039000
2012-12-12,0.122000
2010-09-08,0.060000
2014-09-09,0.021000
2016-06-29,0.027000
1995-11-27,0.275000
2004-06-08,0.136000
2005-06-08,0.090000
2025-03-28,0.088000
1989-06-08,0.385000
2019-12-16,0.045000
2023-09-28,0.107000
2023-12-13,0.126000
1992-12-15,0.717000
2003-12-22,0.570000
2007-03-08,0.077000
2009-03-10,0.041000
1998-12-21,0.314000
2008-09-09,0.063000
2012-06-08,0.026000
2014-03-10,0.011000
2017-09-28,0.031000
2025-09-29,0.104000
2026-06-29,0.090000
1991-12-10,1.012000
1993-12-15,0.048000
2024-12-13,0.124000
2025-12-15,0.104000
1988-12-13,0.479000
1990-12-11,0.465000
1999-06-08,0.185000
1999-12-20,0.312000
2007-06-08,0.127000
2010-12-09,0.230000
2015-06-08,0.023000
1987-12-31,0.472000
2016-09-29,0.023000
2018-09-27,0.042000
2019-09-27,0.054000
2022-06-29,0.046000
2024-09-27,0.118000
2004-09-08,0.083000
2005-03-08,0.046000
2017-12-14,0.035000
2019-03-28,0.040000
2024-06-27,0.130000
1992-06-08,0.239000
2002-06-10,0.171000
2007-12-19,0.152000
2009-12-09,0.175000
2025-06-27,0.100000
1997-06-10,0.243000
2014-06-09,0.019000
2024-03-27,0.112000
2026-03-30,0.076000
2018-06-28,0.040000
1990-06-08,0.314000
1994-11-28,0.235000
1995-06-08,0.252000
1996-12-27,0.350000
2008-03-10,0.053000
2022-03-30,0.017000
2001-12-17,0.257000
2011-06-08,0.047000
2017-06-29,0.031000
1991-06-10,0.273000
1993-11-16,0.403000
2003-06-10,0.140000
2011-09-08,0.038000
1994-12-28,0.065000
1995-12-27,0.057000
2006-12-18,0.165000
2009-09-09,0.066000
2006-03-08,0.066000
2007-09-10,0.126000
2009-06-09,0.066000
2020-06-29,0.005000
2021-09-29,0.006000
2021-12-13,0.007000
2000-12-18,0.360000
2011-03-08,0.034000
2011-12-12,0.245000
2015-03-09,0.015000
2023-03-30,0.055000
2004-12-20,0.117000
2018-03-28,0.030000
2005-09-08,0.085000
2014-12-15,0.052000
1996-06-10,0.308000
2013-06-10,0.021000
2013-09-10,0.020000
2015-09-09,0.025000