f/overrides/event-backup/evifx-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

202 lines
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Plaintext

Date,Dividends
1991-05-01,0.090000
1996-08-15,0.065000
2006-12-27,0.203000
2015-09-09,0.030000
1980-07-31,0.100000
1984-07-31,0.120000
1990-02-01,0.110000
2007-03-09,0.045000
2009-09-09,0.016000
2012-03-09,0.044000
2022-12-09,0.440000
1983-04-29,0.120000
1987-11-02,0.090000
1995-05-15,0.070000
1997-02-18,0.050000
2004-12-09,0.028000
2005-12-09,0.023000
1993-02-01,0.080000
1994-02-01,0.070000
2004-09-14,0.025000
2008-12-30,0.015000
2013-12-19,0.600000
2014-12-16,0.550000
2021-09-09,0.020000
1988-08-01,0.090000
1992-02-03,0.090000
2012-12-19,0.029000
2018-08-09,0.035000
1999-02-23,0.185000
2002-06-17,0.041000
1987-05-01,0.090000
1998-08-18,0.055000
2002-05-09,0.015000
2008-09-09,0.024000
2009-12-30,0.017000
2017-03-09,0.035000
1981-07-31,0.120000
1984-04-30,0.120000
2022-09-09,0.035000
2020-08-18,0.105000
2021-06-09,0.025000
1991-08-01,0.090000
2000-08-31,0.035000
2005-09-09,0.021000
2007-06-11,0.080000
2007-09-11,0.237000
2017-07-26,0.037000
1982-04-30,0.130000
1986-02-03,0.150000
1998-02-25,0.054000
1998-12-22,1.463000
2005-06-09,0.034000
2010-06-09,0.028000
2023-06-09,0.036000
2023-12-11,0.097000
1985-04-30,0.120000
1997-05-16,0.205000
2013-06-11,0.027000
2019-03-11,0.032000
2024-09-10,0.043000
2002-02-12,0.020000
2002-08-14,0.010000
1996-02-15,0.070000
2003-02-11,0.010000
2011-12-28,0.027000
2015-05-21,0.248000
2018-12-11,0.400000
1988-02-01,0.090000
1989-08-01,0.100000
1990-11-01,0.100000
1992-05-01,0.090000
1993-08-16,0.080000
2008-03-11,0.164000
2021-12-09,0.874000
1981-01-30,0.150000
1987-02-02,0.090000
1994-08-08,0.070000
1994-11-08,0.059000
2015-12-15,0.159000
2017-12-12,0.283000
2020-12-10,0.093000
1985-07-31,0.120000
1992-11-02,0.090000
2025-09-09,0.037000
1996-06-24,0.030000
1996-12-16,0.850000
1999-11-30,0.060000
1989-02-01,0.100000
2002-11-19,0.010000
2015-03-10,0.023000
1980-01-31,0.110000
1988-05-02,0.090000
1993-11-01,0.075000
2019-06-11,0.033000
1985-11-01,0.130000
1993-05-03,0.080000
1994-05-02,0.070000
2003-12-09,0.015000
2006-09-11,0.030000
2010-03-09,0.022000
2019-08-08,0.045000
2022-03-09,0.026000
1981-04-30,0.120000
1989-11-01,0.120000
2026-06-09,0.041000
2000-05-16,0.040000
2001-03-15,0.061000
2002-10-15,0.036000
2016-09-09,0.029000
1986-05-01,0.120000
1999-11-16,0.060000
2004-06-09,0.015000
2011-06-09,0.033000
2018-09-11,0.038000
2019-12-17,0.231000
2021-03-09,0.027000
2024-06-11,0.036000
1984-10-31,0.130000
1987-08-03,0.090000
1999-05-18,0.045000
2016-03-09,0.036000
2018-06-11,0.035000
2020-03-10,0.037000
2022-06-09,0.030000
2023-03-09,0.038000
1981-10-30,0.140000
1983-01-31,0.160000
1992-08-10,0.090000
2000-02-28,0.105000
2008-06-10,0.064000
2016-06-09,0.030000
2017-06-09,0.037000
2020-06-09,0.033000
1982-10-29,0.130000
1989-05-01,0.100000
1990-05-01,0.110000
1990-08-01,0.110000
2005-03-09,0.024000
2011-03-09,0.028000
2016-12-13,0.060000
2017-09-11,0.034000
1980-10-31,0.110000
1982-01-29,0.170000
2020-09-09,0.028000
1983-10-31,0.130000
1999-08-17,0.045000
1991-02-01,0.090000
1991-11-01,0.090000
1996-11-15,0.055000
2000-12-12,1.484000
2006-06-09,0.031000
2012-09-11,0.027000
1982-07-30,0.130000
1985-01-31,0.150000
2018-03-09,0.032000
1995-08-15,0.070000
2001-02-13,0.035000
2007-12-24,0.483000
2009-06-09,0.029000
2014-06-10,0.024000
2015-06-09,0.038000
1986-11-03,0.100000
1995-02-15,0.065000
2024-12-10,0.567000
2019-09-10,0.033000
2023-09-11,0.038000
1997-08-18,0.050000
1997-12-29,0.735000
1996-05-15,0.065000
1998-05-18,0.050000
1998-11-17,0.065000
2001-05-16,0.035000
2009-03-10,0.031000
2010-09-09,0.024000
1984-01-31,0.150000
1995-11-15,0.050000
2026-03-10,0.037000
2010-12-29,0.026000
2011-09-09,0.032000
2012-06-11,0.031000
2025-03-11,0.038000
2025-06-10,0.040000
1988-11-01,0.100000
2004-03-09,0.015000
2003-05-13,0.010000
2013-03-11,0.030000
2013-09-10,0.021000
2025-12-09,0.522000
1980-04-30,0.100000
1983-07-29,0.120000
2014-03-11,0.036000
2014-09-09,0.184000
2024-03-11,0.038000
2000-11-29,0.035000
2001-08-16,0.015000
2001-11-16,0.010000
2003-08-12,0.010000
2006-03-09,0.026000
1986-08-01,0.100000
1997-11-18,0.050000