f/overrides/event-backup/dfelx-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
2002-03-08,0.054000
2004-06-08,0.028000
2012-12-13,0.056000
2016-03-30,0.021000
2025-09-29,0.186000
2008-06-10,0.100000
2015-06-08,0.013000
2016-09-29,0.019000
2018-03-28,0.016000
2007-12-19,0.355000
2013-06-10,0.025000
2016-12-15,0.386000
2017-06-29,0.049000
2019-09-27,0.025000
2006-12-18,0.465000
2011-12-13,0.088000
1997-09-18,0.103000
2000-06-08,0.163000
2001-03-08,0.081000
2002-12-16,0.041000
2003-06-10,0.021000
2003-09-09,0.020000
2012-06-08,0.028000
2026-06-29,0.174000
2002-09-10,0.042000
2015-12-16,0.809000
2024-06-27,0.055000
1999-03-09,0.049000
2023-03-30,0.001000
2018-06-28,0.060000
2022-12-14,0.179000
1998-06-18,0.141000
1998-09-17,0.133000
1999-12-20,2.224000
2009-03-10,0.016000
2013-12-12,0.010000
2017-09-28,0.013000
2024-12-13,0.300000
2021-12-15,5.835000
2024-03-27,0.051000
2000-03-08,0.102000
2004-09-08,0.028000
2006-03-08,0.034000
2010-12-09,0.013000
2019-03-28,0.013000
2020-12-16,1.129000
2025-06-27,0.160000
2014-12-16,1.690000
2020-03-30,0.008000
2001-06-08,0.102000
2001-09-10,0.087000
2003-03-10,0.029000
2009-12-09,0.028000
2010-06-08,0.026000
2010-09-08,0.016000
2025-12-15,2.309000
1996-12-19,0.860000
1997-12-18,1.763000
2026-03-30,0.070000
1998-12-21,1.420000
2004-12-20,0.105000
2017-03-30,0.037000
2018-12-18,0.747000
2023-09-28,0.112000
2024-09-27,0.157000
1997-03-20,0.080000
2000-09-08,0.176000
2002-06-10,0.043000
2004-03-09,0.021000
2019-12-17,1.240000
2023-06-29,0.013000
2012-09-10,0.017000
2018-09-27,0.063000
1998-03-19,0.081000
1999-09-08,0.260000
2005-09-08,0.060000
2005-12-19,0.142000
2008-09-09,0.047000
2008-12-10,0.545000
1999-06-08,0.076000
2009-09-09,0.030000
2016-06-29,0.024000
2017-12-15,2.158000
1997-06-19,0.118000
2000-12-18,1.514000
2005-06-08,0.020000
2007-09-10,0.259000
2014-03-10,0.026000
2014-06-09,0.019000
2025-03-28,0.057000
2003-12-22,0.022000
2010-04-30,0.015000
2019-06-27,0.089000
2023-12-13,0.246000