f/overrides/event-backup/awshx-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
1995-09-22,0.145000
2005-03-18,0.140000
2011-12-16,0.225000
2022-09-14,0.205000
1981-10-30,0.100000
1982-01-29,0.100000
1985-04-19,0.120000
1994-06-01,0.050000
2012-09-21,0.165000
2014-03-21,0.180000
2017-06-16,1.240000
1984-04-16,0.130000
1990-11-01,0.050000
2006-03-17,0.160000
2006-12-22,1.005000
2004-09-17,0.140000
2016-09-16,0.190000
2024-06-12,2.979000
1983-10-31,0.110000
1987-04-24,0.130000
1990-12-03,0.050000
2002-12-20,0.174000
1991-09-20,0.140000
1991-12-20,0.140000
1998-09-18,0.145000
2017-03-17,0.195000
1984-11-02,0.120000
1985-02-04,0.120000
1988-08-05,0.130000
1991-03-22,0.140000
2023-06-14,1.550000
1983-04-25,0.130000
1989-03-17,0.140000
2009-06-19,0.175000
2023-03-15,0.205000
2010-12-17,0.220000
2012-03-23,0.165000
2014-06-20,0.180000
2015-09-18,0.185000
1986-02-04,0.120000
1997-03-21,0.145000
2001-03-15,0.145000
2002-10-18,0.033000
2019-09-13,0.203000
2024-03-13,0.205000
2003-03-28,0.135000
2007-06-22,0.180000
2019-12-20,1.749000
1980-10-31,0.090000
1983-07-29,0.110000
1989-06-16,0.140000
1992-03-20,0.140000
1990-06-22,0.140000
2005-09-16,0.150000
2025-12-18,3.244000
2005-12-16,0.590000
2011-03-18,0.155000
2016-06-17,0.190000
2024-09-18,0.205000
1981-04-21,0.130000
1986-04-18,0.130000
1995-03-17,0.145000
1999-06-18,0.145000
2013-12-20,1.115000
2020-03-18,0.205000
2023-09-13,0.205000
1988-11-04,0.130000
1994-03-18,0.140000
1998-12-18,2.770000
2006-09-15,0.160000
2018-06-15,1.682000
2025-03-12,0.205000
1982-04-21,0.130000
1987-02-02,0.130000
1994-09-16,0.040000
2008-12-19,0.675000
2012-12-21,0.225000
2018-03-16,0.200000
2020-12-18,0.920000
1980-07-31,0.090000
2000-12-22,2.640000
2008-06-20,0.180000
2009-03-20,0.180000
1998-03-20,0.145000
2001-06-22,0.135000
2006-06-16,0.160000
2015-06-19,0.185000
2003-09-19,0.135000
2011-06-17,0.155000
2015-03-20,0.185000
2020-06-17,0.205000
1980-04-28,0.130000
1984-08-02,0.110000
1992-12-24,0.140000
1994-12-23,0.610000
2023-12-15,1.550000
2016-12-19,2.040000
1990-09-21,0.140000
1994-08-01,0.050000
2003-12-19,0.320000
2009-12-18,0.175000
2022-03-16,0.205000
1983-01-31,0.110000
2013-06-21,0.175000
2014-12-22,2.344000
2015-12-18,1.846000
1986-11-03,0.130000
2004-06-18,0.135000
2021-09-15,0.205000
2024-12-19,2.805000
2014-09-19,0.180000
2025-06-11,2.918000
1981-07-31,0.100000
1992-06-19,0.140000
1995-12-22,1.275000
2010-06-18,0.150000
2018-12-21,1.247000
1988-04-22,0.130000
1993-09-17,0.140000
1994-05-02,0.050000
2007-12-21,2.120000
2000-06-16,0.145000
2001-09-21,0.135000
2004-12-17,0.410000
1982-10-29,0.110000
1984-02-02,0.110000
1989-09-22,0.140000
1997-09-19,0.145000
2025-09-17,0.205000
1981-01-30,0.100000
1993-03-19,0.140000
1996-09-20,0.145000
2000-09-22,0.145000
2004-03-19,0.135000
2007-09-21,0.180000
1982-07-30,0.100000
1990-12-21,0.100000
1996-06-21,0.145000
2003-06-20,0.135000
2010-03-19,0.150000
2013-03-22,0.175000
1995-06-16,0.145000
1996-03-22,0.145000
2000-03-15,0.145000
2002-06-21,0.135000
2008-03-20,0.180000
2008-09-19,0.180000
2021-12-17,1.337000
1989-12-22,0.200000
1991-06-21,0.140000
1997-12-18,1.840000
1999-03-19,0.145000
2021-06-16,1.913000
1990-03-16,0.140000
1997-06-20,0.145000
1998-06-19,0.145000
1999-12-17,3.250000
1994-06-17,0.040000
2009-09-25,0.175000
2019-06-14,1.099000
2020-09-16,0.205000
2005-06-17,0.150000
2016-03-18,0.190000
2018-09-14,0.200000
2022-12-16,1.145000
1987-11-06,0.130000
1993-06-18,0.140000
1999-09-17,0.145000
2002-09-20,0.135000
2026-06-16,2.801000
2011-09-23,0.155000
2017-09-15,0.195000
2022-06-15,1.727000
1985-08-02,0.120000
1986-08-01,0.130000
1992-09-18,0.140000
2001-12-21,0.775000
1988-12-16,0.040000
1996-12-20,1.385000
2013-09-20,0.175000
1988-02-05,0.130000
1994-09-01,0.050000
2017-12-18,1.753000
1980-01-31,0.090000
2019-03-15,0.203000
2021-03-17,0.205000
2007-03-23,0.170000
2010-09-24,0.150000
2012-06-15,0.165000
2026-03-18,0.205000
1985-11-01,0.120000
1987-08-03,0.130000
1993-12-23,0.140000
2002-03-22,0.135000