f/overrides/event-backup/bgnmx-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

489 lines
9.5 KiB
Plaintext

Date,Dividends
1987-06-30,0.075000
2009-07-31,0.038000
2019-12-31,0.022000
2024-06-28,0.026000
1994-10-31,0.060000
1997-10-31,0.065000
2017-04-28,0.021000
1993-08-31,0.058000
1993-12-15,0.015000
1994-11-30,0.062000
2003-08-29,0.043000
2004-11-30,0.037000
1986-02-28,0.092000
1986-11-28,0.070000
1990-06-29,0.071000
2010-03-31,0.039000
2010-07-30,0.036000
2023-06-30,0.025000
1994-05-31,0.054000
1999-04-30,0.061000
2010-06-30,0.037000
1989-07-31,0.077000
1996-07-31,0.063000
2000-03-31,0.056000
2015-06-30,0.020000
1998-05-29,0.060000
2002-02-28,0.047000
2008-11-28,0.038000
2010-05-28,0.038000
1988-06-30,0.072000
1989-01-31,0.076000
1994-01-31,0.053000
1987-07-31,0.071000
1995-05-31,0.068000
1992-04-30,0.067000
2005-02-28,0.038000
2016-05-31,0.021000
2023-01-31,0.022000
2025-10-31,0.031000
1999-03-26,0.049000
2002-07-31,0.048000
2002-12-31,0.044000
1998-04-24,0.049000
2012-04-30,0.031000
2016-03-31,0.021000
2016-02-29,0.021000
2022-09-30,0.022000
2006-10-31,0.042000
2014-03-31,0.024000
2013-04-30,0.024000
1993-05-28,0.053000
1996-04-30,0.062000
1998-08-28,0.048000
1997-12-26,0.052000
2005-07-29,0.041000
2019-01-31,0.023000
2013-08-30,0.024000
2016-10-31,0.021000
2021-01-29,0.015000
1985-12-31,0.097000
1999-12-31,0.055000
2001-06-29,0.056000
2014-05-30,0.023000
1990-12-31,0.075000
1997-09-26,0.054000
2007-12-31,0.042000
2002-05-31,0.052000
2025-05-30,0.030000
1996-12-31,0.062000
2000-10-31,0.055000
2008-05-30,0.037000
1995-12-29,0.057000
2008-08-29,0.035000
2018-12-31,0.023000
1987-01-30,0.068000
1990-01-31,0.079000
1992-05-29,0.062000
2019-02-28,0.024000
1999-01-29,0.049000
2004-12-31,0.040000
2006-07-31,0.042000
2001-02-28,0.054000
2021-05-28,0.015000
1985-10-31,0.042000
1988-12-30,0.072000
1993-04-30,0.061000
2014-09-30,0.022000
2016-07-29,0.022000
2018-10-31,0.024000
2004-10-29,0.048000
2020-03-31,0.020000
1992-08-31,0.067000
1992-09-30,0.068000
1997-04-25,0.057000
1993-01-29,0.059000
1996-10-25,0.055000
2001-09-28,0.039000
1997-11-28,0.053000
1999-06-25,0.053000
1995-07-31,0.063000
2001-07-31,0.059000
2003-12-31,0.039000
1986-06-30,0.092000
1990-02-28,0.074000
1992-12-31,0.065000
2021-11-30,0.017000
2022-01-31,0.015000
2025-12-31,0.031000
1994-12-30,0.060000
2001-04-30,0.058000
2020-10-30,0.019000
2009-11-30,0.036000
2011-09-30,0.032000
2018-03-29,0.021000
1998-02-27,0.056000
2013-05-31,0.022000
2013-11-29,0.024000
2010-09-30,0.036000
2000-07-31,0.056000
2002-06-28,0.049000
2004-07-30,0.044000
1993-06-30,0.064000
1986-08-29,0.076000
1988-09-30,0.073000
1991-08-30,0.068000
2016-01-29,0.021000
2020-11-30,0.017000
1986-12-31,0.079000
1994-07-29,0.055000
2017-02-28,0.021000
2019-06-28,0.023000
1987-02-27,0.073000
2011-03-31,0.036000
2015-11-30,0.022000
1988-11-30,0.074000
2001-05-31,0.054000
2011-05-31,0.036000
1986-04-30,0.088000
2003-02-28,0.042000
2017-09-29,0.020000
2020-01-31,0.023000
1993-02-26,0.063000
1996-09-27,0.056000
2009-09-30,0.038000
2006-03-31,0.041000
2009-03-31,0.036000
2012-03-30,0.032000
1986-09-30,0.086000
1994-06-30,0.059000
2003-10-31,0.041000
2021-10-29,0.014000
1993-07-30,0.054000
2008-10-31,0.037000
2020-02-28,0.022000
2006-09-29,0.040000
2024-04-30,0.026000
2025-07-31,0.029000
2026-06-30,0.029000
1991-06-28,0.067000
1998-10-30,0.053000
2002-01-31,0.052000
2003-09-30,0.042000
2010-12-31,0.037000
2018-04-30,0.022000
2006-01-31,0.040000
2018-01-31,0.020000
1989-12-29,0.068000
2002-08-30,0.047000
2004-09-30,0.040000
2026-01-30,0.030000
1991-05-31,0.072000
1997-03-27,0.051000
2024-10-31,0.029000
2000-04-28,0.058000
2010-01-29,0.038000
2016-01-28,0.021000
1996-02-29,0.059000
2005-09-30,0.040000
2013-02-28,0.028000
1988-02-29,0.077000
2010-02-26,0.039000
2023-02-28,0.023000
1994-04-29,0.052000
1994-09-30,0.059000
2007-10-31,0.043000
2006-05-31,0.041000
2026-05-29,0.029000
2009-04-30,0.040000
2015-12-31,0.022000
2023-09-29,0.025000
2023-12-29,0.026000
1997-01-31,0.059000
2006-02-28,0.041000
2014-10-31,0.021000
1987-05-29,0.064000
2018-07-31,0.022000
2023-04-28,0.022000
1992-11-30,0.067000
2016-08-31,0.022000
2020-08-31,0.016000
2023-05-31,0.024000
1989-11-30,0.074000
1990-09-28,0.070000
1995-06-30,0.064000
2011-10-31,0.031000
2012-06-29,0.030000
2001-08-31,0.051000
2007-02-28,0.042000
2007-03-30,0.044000
1991-10-31,0.072000
1998-01-30,0.053000
1999-02-26,0.051000
2020-05-29,0.020000
1985-11-29,0.085000
1997-06-27,0.056000
2016-09-30,0.022000
1995-09-29,0.061000
1999-08-27,0.049000
2012-10-31,0.029000
2022-12-30,0.025000
1989-10-31,0.078000
1992-06-30,0.073000
1994-02-28,0.051000
2013-01-31,0.028000
2017-05-31,0.021000
2024-01-31,0.024000
1997-08-29,0.065000
1998-11-30,0.052000
2004-08-31,0.038000
2011-11-30,0.032000
2021-12-31,0.018000
1995-04-28,0.060000
2000-06-30,0.057000
2009-10-30,0.037000
2003-11-28,0.036000
2014-02-28,0.025000
2020-06-30,0.019000
2024-07-31,0.028000
2024-11-29,0.030000
1988-07-29,0.070000
1994-08-31,0.063000
1998-03-31,0.049000
2005-01-31,0.040000
2011-02-28,0.037000
2018-11-30,0.026000
2018-05-31,0.022000
2002-03-28,0.046000
2005-03-31,0.040000
2007-07-31,0.041000
1987-12-31,0.083000
1997-07-25,0.052000
2013-09-30,0.024000
1990-10-31,0.079000
2003-07-31,0.044000
1990-11-30,0.075000
2009-06-30,0.040000
2012-05-31,0.030000
1991-03-28,0.067000
1993-03-31,0.069000
2009-05-29,0.036000
2018-09-28,0.021000
1987-09-30,0.075000
1992-03-31,0.072000
1992-10-30,0.064000
2022-08-31,0.020000
2012-08-31,0.030000
2012-12-31,0.029000
2017-07-31,0.021000
2022-06-30,0.018000
2024-09-30,0.026000
2002-04-30,0.053000
2013-03-28,0.026000
2013-06-28,0.023000
2014-11-28,0.022000
2026-03-31,0.028000
2009-01-30,0.033000
2010-11-30,0.037000
2011-04-29,0.036000
1993-09-30,0.056000
2000-02-29,0.056000
2016-11-30,0.021000
1990-04-30,0.076000
2021-06-30,0.015000
1988-01-29,0.072000
1990-07-31,0.077000
2006-12-29,0.042000
1986-01-31,0.095000
2003-05-30,0.045000
2018-02-28,0.021000
1991-07-31,0.076000
2001-01-31,0.054000
2013-12-31,0.024000
1995-01-31,0.063000
2010-08-31,0.037000
2025-02-28,0.028000
2018-08-31,0.025000
2019-03-29,0.024000
2025-03-31,0.027000
1990-03-30,0.072000
2006-11-30,0.042000
2014-07-31,0.022000
2014-12-31,0.022000
1995-10-31,0.063000
2000-12-29,0.055000
2009-02-27,0.037000
2021-09-30,0.012000
2008-12-31,0.035000
2013-07-31,0.023000
2015-01-30,0.021000
2001-12-31,0.048000
2003-06-30,0.048000
2007-05-31,0.042000
2012-09-28,0.030000
2018-06-29,0.023000
1987-10-30,0.072000
1988-08-31,0.080000
2000-05-31,0.059000
2019-08-30,0.027000
2011-07-29,0.035000
2023-03-31,0.025000
1997-05-30,0.067000
2017-03-31,0.021000
2021-08-31,0.013000
2009-12-31,0.036000
2023-11-30,0.025000
1986-05-30,0.084000
1991-09-30,0.074000
1996-03-29,0.055000
1996-01-31,0.067000
2005-05-31,0.040000
2007-11-30,0.045000
2025-08-29,0.030000
1989-04-28,0.071000
1989-09-29,0.073000
2005-08-31,0.041000
2005-11-30,0.040000
2016-06-30,0.021000
2020-09-30,0.017000
2022-07-29,0.019000
1992-02-28,0.069000
1993-10-29,0.052000
1995-11-30,0.060000
1998-12-31,0.056000
2010-10-29,0.037000
2017-11-30,0.020000
2019-11-29,0.022000
1989-05-31,0.081000
1991-12-31,0.074000
1996-08-30,0.058000
2014-01-31,0.024000
2015-02-27,0.021000
2025-04-30,0.028000
2004-01-30,0.036000
2024-05-31,0.027000
1996-11-29,0.069000
2007-09-28,0.040000
2012-02-29,0.032000
2026-07-31,0.031000
2004-03-31,0.038000
2022-11-30,0.023000
2023-10-31,0.025000
1994-03-31,0.052000
1995-08-31,0.063000
1999-10-29,0.056000
2000-08-31,0.058000
2012-11-30,0.030000
2014-04-30,0.024000
2024-08-30,0.029000
2026-02-27,0.029000
1987-04-30,0.070000
1988-04-29,0.070000
1991-02-28,0.071000
2007-04-30,0.041000
2022-05-31,0.017000
1987-08-31,0.071000
1989-03-31,0.076000
2002-10-31,0.047000
1999-11-30,0.058000
2015-10-30,0.022000
2025-09-30,0.029000
1996-06-28,0.056000
2001-10-31,0.045000
2008-02-29,0.040000
2007-08-31,0.047000
2011-12-30,0.031000
2017-01-31,0.021000
1998-06-26,0.051000
1998-09-30,0.053000
2005-12-30,0.039000
2020-12-31,0.019000
2023-07-31,0.023000
1986-10-31,0.076000
1992-07-31,0.067000
2017-12-29,0.021000
2024-12-31,0.028000
2025-01-31,0.029000
1993-11-30,0.058000
2017-08-31,0.021000
2022-03-31,0.016000
2005-04-29,0.040000
2005-10-31,0.039000
2007-01-31,0.039000
2014-06-30,0.023000
2015-05-29,0.020000
1988-05-31,0.075000
1989-06-30,0.076000
1990-08-31,0.074000
2021-02-26,0.017000
2021-03-31,0.016000
2015-03-31,0.021000
1987-11-30,0.083000
1989-08-31,0.076000
2014-08-29,0.022000
1998-07-31,0.055000
2009-08-31,0.038000
2020-04-30,0.020000
2022-04-29,0.017000
1986-03-31,0.091000
2000-01-31,0.056000
2008-01-31,0.041000
2015-09-30,0.022000
2019-05-31,0.026000
2019-10-31,0.021000
2024-03-28,0.025000
2007-06-29,0.043000
2008-09-30,0.037000
2011-08-31,0.033000
1986-07-31,0.080000
2001-03-30,0.059000
1990-05-31,0.073000
1993-12-31,0.052000
2005-06-30,0.040000
2006-04-28,0.041000
2008-03-31,0.039000
1991-01-31,0.073000
1995-02-28,0.062000
1999-05-28,0.048000
2003-03-31,0.042000
2008-06-30,0.038000
2011-01-31,0.037000
2015-08-31,0.022000
2017-06-30,0.021000
1988-03-31,0.071000
1997-02-28,0.059000
2001-11-30,0.054000
2023-08-31,0.025000
2002-11-29,0.046000
2016-12-30,0.021000
2022-02-28,0.017000
2022-10-31,0.020000
2024-02-29,0.025000
1988-10-31,0.075000
1991-04-30,0.076000
1999-09-30,0.056000
2025-06-30,0.029000
1999-07-30,0.061000
2006-06-30,0.041000
2015-07-31,0.021000
1992-01-31,0.072000
2017-10-31,0.020000
1995-03-31,0.064000
2000-11-30,0.059000
1991-11-29,0.069000
2015-04-30,0.020000
2016-04-29,0.021000
2000-09-29,0.055000
2012-01-31,0.031000
2026-04-30,0.030000
2004-02-27,0.039000
2019-09-30,0.022000
2021-04-30,0.017000
2020-07-31,0.019000
1989-02-28,0.075000
2008-04-30,0.038000
2019-07-31,0.025000
2021-07-30,0.016000
2025-11-28,0.028000
1987-03-31,0.073000
2006-08-31,0.042000
2019-04-30,0.024000
2013-10-31,0.024000
2003-01-31,0.041000
2011-06-30,0.036000
2012-07-31,0.030000
1996-05-31,0.059000
2003-04-30,0.041000
2008-07-31,0.038000