f/overrides/event-backup/fcvsx-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
2015-10-02,0.232000
2018-07-06,0.201000
2025-04-04,0.258000
1987-12-17,0.180000
2001-03-09,0.160000
2001-06-08,0.180000
2005-04-01,0.070000
2018-10-05,0.363000
1988-06-08,0.140000
1996-06-07,0.180000
1996-09-13,0.180000
1995-06-09,0.160000
2002-09-13,0.180000
2005-10-07,0.110000
2014-10-03,0.153000
2019-10-04,0.091000
1987-06-09,0.100000
1989-12-18,0.350000
1992-03-13,0.140000
2021-12-28,7.206000
1989-03-08,0.140000
1997-09-12,0.150000
2009-07-10,0.217000
2013-12-30,0.205000
1991-09-13,0.140000
2003-09-12,0.180000
2005-12-16,0.150000
2006-04-07,0.120000
2015-07-01,0.173000
2000-01-07,0.250000
2010-07-09,0.174000
2014-04-04,0.128000
1989-09-13,0.140000
1990-09-14,0.140000
1990-12-14,0.200000
2002-03-08,0.180000
2003-03-07,0.180000
2017-04-07,0.197000
2017-10-06,0.169000
2021-04-05,0.097000
1999-06-11,0.130000
1999-12-17,1.600000
2000-12-29,4.520000
2022-04-01,0.080000
2024-04-05,0.182000
2006-07-07,0.100000
2006-10-06,0.140000
2024-10-04,0.184000
2004-12-17,0.100000
2009-10-02,0.163000
2010-12-10,0.255000
2019-07-05,0.117000
1992-12-11,0.650000
1994-06-10,0.200000
2003-06-06,0.180000
1988-12-19,0.300000
1992-09-11,0.140000
2025-07-11,0.223000
2000-09-15,0.180000
2001-12-28,0.410000
2008-07-11,0.130000
2013-04-05,0.194000
2014-12-12,1.313000
1988-09-08,0.140000
1997-03-07,0.200000
1999-09-10,0.057000
2011-07-08,0.186000
2016-07-08,0.100000
1996-12-13,1.040000
1997-12-26,1.920000
2008-10-03,0.150000
1991-12-13,0.590000
2011-10-07,0.201000
2012-07-06,0.142000
2012-12-14,0.214000
2015-12-11,2.249000
2017-12-26,0.739000
2022-07-01,0.103000
1996-01-05,0.080000
2001-09-21,0.180000
2011-12-09,0.235000
2023-04-05,0.120000
1993-03-05,0.160000
1998-09-11,0.150000
2013-12-13,0.167000
1994-03-11,0.180000
1999-01-08,0.050000
2023-07-07,0.099000
1997-06-06,0.200000
2004-10-08,0.130000
2020-12-29,3.746000
1988-03-16,0.140000
1993-09-10,0.160000
1995-09-08,0.160000
2014-07-03,0.112000
2020-10-02,0.238000
1993-12-10,1.340000
1998-12-18,1.280000
2013-10-04,0.215000
2009-12-11,0.275000
2016-12-27,0.646000
2019-12-27,0.738000
2023-10-06,0.161000
1995-12-15,1.040000
2002-12-20,0.290000
2009-04-03,0.281000
2019-04-05,0.078000
2025-10-03,0.326000
2026-07-10,0.150000
2000-06-09,0.160000
2007-07-06,0.110000
2018-12-26,1.702000
2026-04-01,0.118000
2000-03-10,0.150000
2018-04-06,0.207000
2023-12-26,0.312000
1991-03-15,0.140000
1994-12-09,0.220000
2008-04-04,0.160000
2008-12-12,0.330000
2013-07-05,0.182000
2016-04-08,0.173000
2022-12-27,0.820000
1996-12-30,0.020000
2001-01-05,0.020000
2007-12-14,1.030000
1999-03-12,0.160000
2008-01-11,0.020000
2010-10-01,0.208000
2011-04-06,0.169000
1987-09-08,0.140000
1996-03-08,0.160000
1998-06-05,0.130000
2024-12-26,1.865000
2017-07-07,0.202000
2020-04-03,0.115000
2022-10-07,0.122000
2004-03-05,0.180000
2006-12-15,0.140000
2007-04-04,0.120000
2015-04-01,0.092000
2021-10-01,0.115000
2025-12-26,3.347000
1991-06-07,0.140000
1993-06-11,0.160000
2004-06-18,0.180000
2007-10-05,0.150000
2015-01-16,0.009000
2016-10-07,0.391000
2021-07-02,0.110000
2024-07-05,0.336000
1990-03-06,0.140000
1990-06-08,0.140000
1998-03-06,0.150000
2012-04-04,0.179000
2020-07-10,0.199000
2014-01-10,0.005000
1989-06-07,0.140000
1995-03-10,0.160000
2005-07-01,0.080000
2003-12-19,0.170000
2012-10-05,0.188000
1992-06-19,0.140000
1994-09-09,0.200000
1998-01-02,0.070000