f/overrides/event-backup/jmuex-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
2022-09-28,0.058000
1994-03-30,0.016000
2004-12-31,0.049000
2010-03-31,0.024000
2014-12-22,0.069000
2017-12-20,0.053000
2002-12-20,0.021000
2006-08-30,0.000000
2020-09-28,0.043000
1996-12-26,0.176000
2012-06-29,0.030000
1995-12-22,0.126000
2019-03-27,0.031000
2020-03-27,0.039000
2022-12-20,0.057000
2016-06-28,0.032000
2018-06-27,0.043000
1993-12-27,0.024000
1996-08-16,0.072000
1999-06-24,0.030000
2006-03-31,0.035000
2007-09-28,0.034000
1998-08-13,0.020000
2006-06-30,0.040000
2009-06-30,0.028000
2011-09-30,0.025000
2012-03-30,0.032000
2021-09-28,0.033000
2021-12-20,0.036000
2013-06-28,0.038000
2014-06-30,0.042000
2016-12-20,0.050000
2004-03-31,0.018000
2009-12-21,0.033000
2015-12-21,0.046000
2017-09-27,0.042000
2019-06-26,0.041000
2003-06-30,0.025000
2011-12-20,0.037000
2018-03-27,0.032000
2018-09-26,0.049000
1997-08-14,0.071000
2002-06-26,0.016000
2003-09-30,0.021000
2016-12-14,0.000000
2021-06-28,0.035000
2004-09-30,0.023000
2014-12-12,0.000000
2015-12-11,0.000000
2019-12-12,0.000000
2011-06-30,0.028000
2019-09-26,0.041000
2013-09-30,0.036000
2022-12-13,0.000000
2004-06-30,0.020000
2010-06-30,0.025000
2016-03-29,0.037000
2020-06-26,0.042000
1997-12-23,0.078000
2007-03-30,0.031000
2008-12-18,0.000000
2023-03-29,0.049000
2007-12-17,0.000000
2009-09-30,0.022000
1995-08-14,0.073000
1999-12-17,0.068000
2000-08-17,0.010000
2001-12-21,0.024000
2006-12-15,0.143000
2024-03-26,0.032000
1998-03-26,0.030000
2000-06-22,0.020000
2008-09-30,0.036000
2015-06-26,0.041000
2017-03-29,0.029000
2000-12-19,0.052000
2001-06-21,0.010000
2010-09-30,0.026000
2012-12-13,0.000000
2023-09-27,0.050000
2006-12-22,0.041000
2008-03-31,0.035000
2012-12-18,0.059000
2013-12-12,0.000000
2017-06-28,0.037000
2005-02-15,0.010000
2005-12-15,0.000000
2015-03-27,0.032000
2020-12-11,0.000000
2009-03-31,0.063000
2012-09-28,0.037000
2016-09-28,0.043000
1994-07-12,0.030000
2002-09-26,0.017000
2005-06-30,0.030000
2014-03-31,0.035000
1998-06-25,0.030000
1999-03-25,0.010000
2013-03-28,0.031000
2019-12-19,0.047000
1999-08-19,0.010000
2020-12-18,0.035000
2021-12-13,0.000000
1994-12-20,0.114000
2003-12-31,0.026000
2008-06-30,0.034000
2010-12-20,0.005000
2018-12-12,0.000000
2003-03-19,0.019000
2017-12-13,0.000000
2015-09-28,0.036000
2022-03-29,0.035000
2014-09-30,0.038000
2024-06-26,0.045000
2024-09-26,0.042000
2005-12-27,0.039000
2006-09-29,0.037000
2007-06-29,0.038000
2011-03-31,0.047000
2011-12-15,0.000000
2013-12-20,0.040000
2018-12-19,0.050000
2022-06-28,0.049000
2023-06-28,0.047000
1998-12-17,0.109000
2007-12-20,0.035000
2021-03-29,0.046000
2023-12-13,0.000000
2002-03-26,0.014000
2005-03-31,0.013000
2005-09-30,0.028000
2023-12-20,0.059000