f/overrides/event-backup/fmdcx-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
2021-12-06,4.218000
2006-09-25,0.072000
2006-11-27,1.062000
2006-12-26,0.100000
2018-12-06,4.363000
1997-12-16,1.443000
2009-06-24,0.039000
2012-06-25,0.042000
2015-09-24,0.056000
2000-03-24,0.041000
2007-06-25,0.103000
2023-12-15,0.072000
2002-12-26,0.028000
2003-09-24,0.025000
2013-09-24,0.060000
2013-12-05,0.782000
2000-11-21,2.329000
2000-12-26,0.041000
2001-09-24,0.019000
2002-07-31,0.001000
2017-09-25,0.031000
2021-03-24,0.031000
1997-06-24,0.043000
2007-12-24,0.060000
2013-06-24,0.055000
2016-12-05,2.576000
2009-03-24,0.052000
2012-09-24,0.048000
2022-06-24,0.022000
2024-03-15,0.043000
1997-03-24,0.043000
2008-09-24,0.056000
2014-12-18,0.104000
2025-03-17,0.038000
2005-03-24,0.044000
2007-11-26,2.477000
2010-03-24,0.041000
2022-12-07,1.712000
1994-12-22,0.050000
2003-11-24,0.138000
2018-03-26,0.052000
2025-12-15,1.505000
1999-06-24,0.039000
2007-09-24,0.066000
2014-09-24,0.060000
2015-03-24,0.059000
1993-03-24,0.060000
1995-06-26,0.045000
1996-09-24,0.040000
1997-09-24,0.043000
2017-03-24,0.051000
2025-09-15,0.023000
2012-03-26,0.046000
2014-03-24,0.056000
2019-06-24,0.046000
2022-12-19,0.089000
1995-09-25,0.055000
2009-12-24,0.062000
2010-06-24,0.021000
2011-03-24,0.031000
2001-03-26,0.045000
2023-06-15,0.015000
2000-06-26,0.041000
2002-03-25,0.026000
2013-03-25,0.047000
2014-06-24,0.049000
1999-11-19,2.225000
2016-09-26,0.081000
2023-09-15,0.041000
2026-03-16,0.033000
2022-09-26,0.026000
1995-12-12,0.075000
1996-03-25,0.040000
2004-09-24,0.035000
2008-12-08,0.232000
2024-09-16,0.041000
1994-03-24,0.045000
2003-03-24,0.028000
2015-12-18,0.086000
2018-09-24,0.054000
2020-03-24,0.054000
2005-12-27,0.099000
2008-07-30,0.579000
2016-06-24,0.036000
2017-06-26,0.024000
2007-03-26,0.085000
2011-12-06,0.936000
2016-12-19,0.102000
2024-06-17,0.020000
1998-03-24,0.055000
2001-11-20,0.252000
2001-12-24,0.030000
2006-06-26,0.072000
2026-06-15,0.025000
2005-09-26,0.053000
2010-12-06,0.429000
2012-12-06,0.591000
2024-12-12,2.249000
2003-06-24,0.025000
2006-03-24,0.072000
2017-12-05,4.065000
2019-03-25,0.054000
2023-03-15,0.044000
1993-09-24,0.050000
2004-06-24,0.031000
2014-12-04,2.631000
2019-09-24,0.044000
1998-12-16,0.036000
2010-09-24,0.036000
2010-12-27,0.056000
2021-06-24,0.016000
1995-03-24,0.050000
2002-09-24,0.024000
2010-04-20,0.044000
2018-06-25,0.050000
2015-12-03,3.168000
2019-12-18,0.083000
2020-09-24,0.006000
2025-06-16,0.030000
1993-06-24,0.070000
2000-09-25,0.041000
2003-12-24,0.026000
2015-06-24,0.045000
1992-12-18,0.050000
1996-12-17,0.633000
2009-09-24,0.020000
1994-06-24,0.045000
2016-03-24,0.059000
2021-09-24,0.015000
2023-12-12,1.619000
2012-12-20,0.097000
2019-12-05,1.880000
1999-03-24,0.036000
2004-12-27,0.045000
2008-03-24,0.054000
2008-12-24,0.090000
2005-06-24,0.044000
2017-12-18,0.087000
2021-12-20,0.071000
1998-06-24,0.043000
1998-09-24,0.040000
2002-10-31,0.001000
2004-03-24,0.027000
2011-09-26,0.032000
2020-06-24,0.028000
2024-12-16,0.057000
1999-12-20,0.041000
2002-06-28,0.001000
2005-11-23,1.158000
2008-06-24,0.052000
1996-06-24,0.040000
1998-11-20,1.832000
2013-12-19,0.069000
2020-12-18,0.063000
1993-12-20,0.060000
1994-09-26,0.040000
1999-09-24,0.041000
2011-06-24,0.035000
2018-12-18,0.079000
2020-12-04,2.862000
2022-03-24,0.033000
2001-06-25,0.031000
2004-11-24,0.769000
2011-12-22,0.052000
2013-06-26,1.262000