f/overrides/event-backup/cwbfx-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
2005-06-24,0.160000
2017-12-15,0.090000
2021-09-17,0.080000
1994-03-18,0.220000
1998-09-18,0.200000
2006-06-16,0.160000
2008-10-02,0.180000
2020-12-21,0.374000
1991-06-21,0.520000
2022-09-16,0.080000
1999-12-15,0.218000
2011-09-27,0.180000
2012-12-20,0.420000
2020-03-20,0.100000
2003-12-17,0.360000
2007-06-05,0.160000
2010-06-22,0.180000
2015-03-25,0.020000
2015-10-05,0.020000
2020-09-18,0.100000
2024-09-20,0.120000
1998-03-20,0.200000
1991-12-13,0.580000
1998-06-26,0.200000
2000-10-02,0.150000
2007-03-26,0.160000
2007-12-21,0.586000
2020-06-19,0.111000
2021-12-20,0.160000
1989-12-15,0.590000
2017-03-17,0.090000
2025-06-13,0.150000
1987-12-18,0.367000
2026-03-19,0.150000
1997-12-19,0.476000
2008-12-24,0.271000
2000-03-23,0.150000
2008-06-18,0.180000
2013-12-19,0.170000
2016-06-17,0.080000
2019-12-17,0.168000
1995-03-17,0.220000
2000-12-20,0.080000
2003-03-21,0.120000
2005-03-18,0.160000
2019-03-22,0.090000
1994-12-14,0.300000
2019-06-21,0.100000
2002-12-18,0.160000
2005-10-03,0.160000
2007-10-02,0.160000
2017-09-15,0.090000
2021-03-19,0.080000
2025-09-19,0.150000
2003-06-20,0.140000
1995-12-13,0.540000
2010-12-23,0.277000
2012-03-27,0.130000
2014-06-25,0.080000
1993-10-01,0.220000
2006-12-21,0.160000
2009-09-29,0.180000
2011-12-22,0.182000
2015-12-17,0.050000
1997-03-21,0.220000
2004-06-18,0.140000
2004-12-15,0.463000
2006-10-02,0.160000
1992-10-02,0.220000
2005-12-21,0.482000
2013-06-25,0.100000
2016-03-18,0.080000
1992-12-18,0.210000
2002-06-21,0.080000
2008-03-11,0.180000
2012-10-08,0.100000
2023-03-17,0.090000
2001-10-01,0.080000
1995-09-22,0.220000
1994-10-07,0.220000
2014-12-18,0.345000
2024-03-15,0.110000
2025-12-17,0.150000
2011-03-22,0.180000
1996-12-20,0.520000
2001-06-27,0.080000
2006-03-17,0.160000
2023-06-16,0.100000
1993-06-18,0.220000
1999-03-19,0.200000
1999-06-18,0.150000
2001-03-15,0.080000
2003-10-01,0.140000
2010-09-27,0.180000
2018-09-21,0.090000
2023-09-15,0.110000
1988-12-16,0.550000
2025-03-14,0.140000
1990-12-14,0.580000
2000-06-23,0.150000
2001-12-19,0.080000
2004-10-01,0.140000
2016-12-16,0.148000
1989-06-23,0.550000
2009-03-20,0.180000
2024-12-18,0.130000
2026-06-17,0.155000
1996-03-22,0.220000
1996-09-20,0.220000
1997-09-19,0.220000
2009-12-23,0.215000
2013-03-26,0.100000
2014-03-26,0.080000
2019-09-20,0.100000
1994-06-17,0.220000
1999-10-01,0.150000
2002-03-22,0.080000
2022-12-19,0.080000
1992-06-19,0.500000
2015-06-19,0.020000
2016-10-03,0.080000
2023-12-18,0.110000
1998-12-15,0.523000
1993-12-17,0.320000
2010-03-23,0.180000
2011-06-27,0.180000
2021-06-18,0.204000
2022-03-18,0.080000
1993-03-19,0.220000
2004-03-19,0.140000
2009-06-16,0.180000
2012-06-26,0.130000
2018-06-22,0.090000
2018-12-18,0.145000
2022-06-17,0.080000
1990-06-22,0.600000
1995-06-16,0.220000
1996-06-28,0.220000
2017-06-16,0.090000
2018-03-23,0.090000
1988-06-24,0.550000
2013-10-07,0.100000
2014-10-06,0.080000
2024-06-14,0.110000
1997-06-20,0.220000