f/overrides/event-backup/gtcix-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
1997-10-29,0.620000
2001-04-04,0.070000
1991-04-16,0.040000
1993-07-07,0.097000
2008-07-02,0.328000
2013-07-03,0.141000
2018-10-03,0.058000
2023-04-05,0.084000
1996-07-09,0.120000
2008-04-02,0.129000
2015-07-01,0.076000
2018-12-14,0.077000
2009-07-01,0.191000
2019-04-03,0.038000
2024-12-16,1.040000
2025-12-15,0.722000
1988-12-30,0.006000
2006-04-05,0.035000
2014-07-02,0.167000
2015-10-07,0.007000
2017-12-13,0.038000
2022-10-05,0.072000
1994-07-06,0.040000
1995-07-06,0.150000
2013-12-12,0.085000
2024-07-03,0.220000
1994-04-06,0.033000
1994-12-29,0.090000
1999-07-07,0.190000
2018-07-05,0.191000
2021-10-06,0.081000
1997-07-02,0.180000
2000-10-04,0.020000
2003-07-02,0.181000
2010-12-13,0.011000
2012-10-03,0.056000
1998-12-17,0.085000
2016-12-14,0.024000
2022-07-06,0.149000
2026-04-01,0.076000
2002-04-03,0.047000
2004-10-06,0.096000
2005-10-26,3.389000
2006-07-05,0.164000
2024-04-03,0.087000
2024-10-02,0.077000
1990-01-02,0.362000
1990-12-31,0.040000
1995-10-04,0.035000
2007-04-04,0.064000
2016-07-06,0.148000
2023-12-15,0.146000
1993-12-28,0.081000
1989-12-28,0.080000
1992-04-01,0.028000
2001-07-06,0.150000
2001-10-03,0.100000
2020-04-01,0.026000
1992-10-07,0.066000
1997-04-02,0.080000
2000-07-06,0.170000
2011-12-12,0.011000
2022-04-06,0.187000
2023-07-05,0.129000
2017-10-04,0.062000
1993-10-06,0.055000
1996-04-04,0.055000
1999-04-07,0.095000
2002-07-03,0.161000
2003-04-02,0.037000
2004-12-17,0.133000
1991-12-31,0.050000
2011-04-06,0.072000
2025-07-02,0.130000
2020-07-01,0.058000
1996-10-02,0.140000
1998-10-07,0.195000
2000-10-27,1.105000
2005-04-06,0.073000
2006-12-15,0.094000
2008-10-01,0.079000
1994-10-05,0.100000
2004-07-07,0.115000
2015-12-11,0.012000
2021-07-07,0.108000
1997-10-01,0.090000
2005-07-06,0.239000
2011-07-06,0.175000
2012-04-04,0.081000
2012-07-11,0.169000
2017-04-05,0.030000
2007-10-24,3.222000
1991-10-01,0.070000
1995-04-05,0.045000
1995-12-28,0.150000
2009-10-07,0.022000
2025-04-02,0.043000
1991-07-15,0.130000
2002-12-13,0.049000
2019-10-02,0.094000
2026-07-01,0.237000
1998-05-06,0.030000
1999-10-06,0.200000
2004-04-07,0.030000
1996-12-27,0.065000
2002-10-02,0.033000
2003-12-12,0.070000
2007-07-05,0.213000
2007-10-03,0.049000
2010-07-07,0.187000
2011-10-05,0.061000
1990-10-15,0.340000
2005-10-05,0.023000
2009-04-01,0.039000
2013-04-03,0.061000
1992-12-30,0.055000
1993-04-07,0.042000
2000-12-15,0.020000
2010-10-06,0.060000
2014-12-11,0.046000
1992-07-02,0.119000
1998-10-28,0.160000
2006-10-04,0.085000
2014-10-01,0.027000
2018-04-04,0.004000
2020-10-07,0.215000
1998-07-01,0.100000
2006-10-25,2.703000
2019-07-03,0.204000
2021-04-07,0.163000
2019-12-13,0.090000
2021-12-14,0.130000
1996-10-29,0.060000
2000-04-05,0.140000
2003-10-01,0.043000
2009-12-14,0.002000
2016-04-06,0.009000
2017-07-05,0.140000
2023-10-04,0.068000
2025-10-01,0.024000
1997-12-29,0.075000
1999-10-27,1.030000
2007-12-17,0.004000
2016-10-05,0.053000
2022-12-15,0.011000