f/overrides/event-backup/cwgix-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
1997-06-30,0.220000
1999-03-19,0.180000
2001-06-08,0.130000
2004-06-04,0.170000
2009-12-16,0.180000
2013-03-15,0.170000
2014-06-13,0.420000
2026-06-15,0.350000
1994-06-03,0.140000
2003-03-21,0.150000
2006-03-17,0.150000
2007-12-17,3.639000
2009-09-25,0.150000
2018-12-18,2.411000
2025-06-09,0.350000
1993-09-24,0.100000
1996-03-22,0.150000
2004-03-19,0.150000
2005-06-03,0.200000
2006-06-19,0.300000
2010-03-19,0.150000
2015-12-22,1.000000
2016-09-14,0.200000
1999-12-14,1.866000
2002-12-12,0.100000
2018-03-14,0.200000
1995-09-22,0.170000
2006-12-20,2.049000
2007-03-16,0.200000
2016-12-21,1.556000
1997-03-31,0.275000
2015-03-13,0.170000
2025-09-15,0.200000
2016-06-15,0.350000
2026-03-16,0.200000
1993-06-04,0.130000
2021-09-13,0.200000
2022-06-13,0.350000
2024-03-11,0.200000
1996-09-30,0.180000
2009-03-20,0.150000
2023-12-12,1.304000
1996-06-07,0.250000
2000-06-02,0.185000
2003-06-06,0.170000
2003-12-12,0.463000
2004-09-24,0.240000
2018-06-13,0.350000
1997-12-31,0.110000
1998-12-14,2.320000
1998-03-20,0.260000
1996-12-31,0.900000
1998-09-25,0.140000
2001-03-14,0.335000
2003-09-19,0.140000
2001-12-13,0.060000
2019-03-13,0.200000
2019-09-11,0.200000
2019-12-17,0.528000
1998-06-05,0.210000
2004-12-10,1.096000
2007-09-21,0.250000
2011-09-16,0.150000
2024-06-10,0.350000
1993-12-10,0.090000
2001-09-21,0.130000
2012-06-15,0.410000
2013-06-14,0.420000
2022-09-12,0.200000
2023-09-11,0.200000
1997-12-12,1.840000
2011-12-16,0.250000
2015-06-17,0.420000
2018-09-12,0.200000
1994-12-16,0.150000
1995-12-08,0.140000
1996-06-28,0.250000
2000-12-14,3.035000
2005-12-20,1.737000
2010-09-17,0.150000
2015-09-16,0.170000
2022-03-14,0.200000
2023-06-12,0.350000
1999-06-04,0.180000
2013-12-13,0.250000
2024-12-17,4.259000
1999-09-24,0.090000
2000-09-15,0.170000
2005-03-18,0.150000
2008-06-25,0.430000
2012-09-21,0.160000
2013-09-20,0.170000
2017-06-14,0.350000
1995-06-02,0.190000
2014-09-19,0.170000
2014-12-12,0.290000
2007-06-15,0.400000
2011-06-17,0.400000
2014-03-14,0.170000
2016-03-16,0.200000
2017-03-15,0.200000
2017-09-13,0.200000
1997-09-30,0.170000
2002-06-07,0.170000
2009-06-19,0.400000
2010-12-17,0.200000
2017-12-20,2.689000
2020-09-14,0.200000
2021-12-14,3.594000
2005-09-23,0.150000
2006-09-19,0.200000
2020-03-16,0.200000
1994-03-28,0.080000
2000-03-14,0.335000
2021-03-15,0.200000
2008-09-24,0.250000
2020-12-15,0.130000
2002-09-20,0.140000
2011-03-18,0.150000
2012-03-16,0.150000
2023-03-13,0.200000
2024-09-16,0.200000
2025-03-10,0.200000
1995-03-17,0.120000
2008-03-20,0.200000
2008-12-17,0.300000
2019-06-12,0.350000
2010-06-18,0.400000
2022-12-13,0.330000
2025-12-16,6.787000
1994-09-23,0.150000
2002-03-22,0.110000
2012-12-14,0.270000
2020-06-15,0.200000
2021-06-14,0.350000