f/overrides/event-backup/fginx-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
1999-06-30,0.002000
2001-04-02,0.020000
2002-09-30,0.010000
2012-06-29,0.024000
2017-03-29,0.040000
2018-09-26,0.063000
2007-12-07,0.229000
2021-03-22,0.046000
1995-12-29,0.040000
2020-03-20,0.054000
1994-12-30,0.048000
2003-06-30,0.010000
2018-03-27,0.098000
1999-11-01,1.549000
2005-12-30,0.013000
2011-03-31,0.024000
2014-06-30,0.033000
1994-07-01,0.024000
2013-06-28,0.030000
2019-06-26,0.070000
1994-10-03,0.033000
2006-09-29,0.013000
2014-12-31,1.128000
1998-09-30,0.013000
2002-03-28,0.008000
2003-03-31,0.010000
2010-06-30,0.020000
2011-12-30,0.008000
1998-06-30,0.010000
1998-10-30,0.002000
2005-09-30,0.013000
2016-09-28,0.040000
2023-09-22,0.089000
2001-10-01,0.010000
2007-03-30,0.013000
2008-12-31,0.139000
2017-06-28,0.040000
2014-03-31,0.033000
2017-09-27,0.116000
2023-12-18,0.763000
1995-07-03,0.040000
1995-10-02,0.040000
1997-11-28,0.274000
2005-03-31,0.018000
2012-09-28,0.024000
2025-06-20,0.059000
2025-12-15,1.642000
2021-12-17,1.487000
2025-03-21,0.075000
2025-09-22,0.069000
1996-09-30,0.025000
2007-06-29,0.014000
2007-12-31,0.050000
2011-11-30,0.065000
2013-12-31,0.782000
2006-06-30,0.013000
2015-12-29,1.049000
2022-12-16,0.723000
1997-09-30,0.008000
2008-06-30,0.020000
2026-03-20,0.080000
1997-06-30,0.011000
2001-07-02,0.010000
2003-04-30,0.010000
2014-09-30,0.033000
2024-12-16,1.553000
2003-12-31,0.010000
2004-12-31,0.050000
2010-03-31,0.015000
2012-03-30,0.024000
2020-12-18,0.700000
2021-09-22,0.099000
2024-06-21,0.081000
1996-06-28,0.025000
1996-12-30,0.185000
2006-03-31,0.013000
2009-12-31,0.012000
2013-03-28,0.025000
2002-12-31,0.015000
2003-09-30,0.008000
2015-03-27,0.033000
2015-09-28,0.035000
2019-03-27,0.063000
2020-06-22,0.047000
2024-09-20,0.083000
1996-04-01,0.025000
1998-12-30,0.023000
2008-03-31,0.018000
2009-06-30,0.009000
2010-09-30,0.024000
2001-12-31,0.020000
2019-09-26,0.071000
2019-12-19,7.031000
2022-09-22,0.085000
1993-12-31,0.020000
1994-04-04,0.024000
1998-03-31,0.010000
1999-10-01,0.009000
2021-06-22,0.058000
2006-12-29,0.215000
2008-09-30,0.020000
1997-12-30,0.005000
2004-03-31,0.005000
2004-06-30,0.005000
2011-09-30,0.024000
2013-09-30,0.030000
2018-12-27,4.085000
2022-06-22,0.076000
2026-06-22,0.069000
2000-11-01,1.485000
2004-09-30,0.010000
2010-12-31,0.109000
2015-06-26,0.035000
2020-09-22,0.055000
2022-03-22,0.072000
2009-09-30,0.012000
2011-06-30,0.024000
2016-03-29,0.040000
2016-12-28,0.924000
2018-06-27,0.070000
2006-10-31,0.050000
2007-09-28,0.014000
2023-03-22,0.073000
2023-06-22,0.081000
2005-06-30,0.018000
2017-12-27,1.027000
2024-03-22,0.086000
1995-04-03,0.040000
1997-03-31,0.015000
1999-03-31,0.009000
2012-12-31,0.139000
2016-06-28,0.040000