f/overrides/event-backup/cfvlx-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
1998-06-24,0.054000
1999-12-31,0.042000
2004-12-28,0.091000
2009-03-27,0.077000
2023-12-21,0.191000
2002-09-25,0.066000
2005-03-28,0.073000
2015-12-04,3.265000
2018-03-29,0.193000
1997-09-23,0.058000
1999-06-30,0.038000
2001-06-29,0.037000
2002-10-31,0.071000
2004-09-27,0.048000
2013-03-22,0.158000
2019-06-21,0.193000
2024-12-05,1.890000
2000-12-01,0.919000
2020-09-25,0.209000
2001-03-30,0.040000
2003-06-25,0.059000
2008-09-26,0.102000
2020-12-28,0.190000
2021-09-24,0.212000
1999-09-30,0.038000
2001-09-28,0.049000
2007-12-04,2.868000
2009-09-28,0.057000
2014-12-05,0.917000
2015-03-27,0.218000
2023-09-21,0.216000
2010-06-25,0.049000
2011-12-23,0.153000
2018-12-07,2.762000
2022-12-22,0.287000
1998-03-25,0.038000
2006-12-26,0.093000
2012-03-23,0.157000
2022-12-08,1.799000
2021-03-26,0.184000
2005-06-27,0.061000
2007-03-28,0.083000
2008-12-29,0.101000
2012-12-26,0.214000
2016-03-18,0.206000
2017-03-24,0.207000
2010-03-26,0.049000
2016-09-23,0.199000
2019-12-27,0.193000
2004-06-25,0.066000
2003-12-31,0.065000
2015-12-28,0.202000
2017-06-30,0.228000
2022-09-22,0.267000
2025-12-18,0.153000
2000-06-30,0.042000
2025-12-04,3.032000
2000-12-26,0.086000
2005-09-27,0.066000
2005-12-27,0.092000
2017-12-22,0.228000
2024-09-26,0.198000
2025-09-18,0.157000
2014-09-26,0.205000
2018-06-29,0.191000
2002-06-28,0.076000
2006-03-28,0.076000
2014-06-27,0.195000
2019-12-06,1.539000
2023-06-22,0.224000
2002-03-28,0.055000
2012-09-21,0.163000
2024-06-20,0.183000
2024-12-19,0.208000
2013-09-27,0.194000
2017-12-08,3.262000
2019-03-22,0.175000
2019-09-27,0.207000
1997-06-23,0.076000
1999-03-31,0.030000
2006-06-27,0.092000
2006-12-05,2.410000
2001-12-24,0.053000
2020-03-27,0.212000
2016-12-02,0.592000
2020-06-26,0.212000
2022-06-23,0.207000
2006-12-12,2.410000
2014-03-28,0.062000
2021-12-27,0.237000
2025-06-20,0.183000
2006-09-26,0.086000
2009-12-28,0.068000
2010-12-27,0.073000
2024-03-21,0.179000
2023-12-07,0.953000
2004-03-31,0.043000
2007-09-26,0.091000
2007-12-26,0.108000
2008-03-27,0.089000
2018-09-21,0.190000
2023-03-23,0.199000
2009-06-26,0.069000
2010-09-24,0.059000
2012-06-22,0.174000
2018-06-22,0.191000
2021-06-25,0.201000
2025-03-20,0.187000
2007-06-27,0.094000
2014-12-26,0.188000
2015-06-26,0.207000
2016-06-24,0.154000
2021-12-03,1.040000
1997-12-19,0.051000
2011-09-23,0.163000
2013-12-06,0.023000
2018-12-26,0.210000
2003-03-26,0.061000
2008-06-26,0.095000
2013-12-27,0.194000
2026-03-27,0.163000
2000-03-31,0.038000
2015-09-25,0.240000
2022-03-24,0.186000
2026-06-26,0.151000
1998-12-18,0.044000
2003-09-25,0.055000
2011-03-25,0.075000
2013-06-21,0.170000
2016-12-30,0.218000
2017-09-22,0.217000
1998-09-24,0.045000
2000-09-29,0.032000
2002-12-31,0.070000
2011-06-24,0.140000