f/overrides/event-backup/drevx-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
2003-06-30,0.018000
1980-10-15,0.070000
2004-03-31,0.040000
2008-09-30,0.034000
2011-06-30,0.028000
2012-03-30,0.020000
2026-06-30,0.013000
1990-12-20,0.510000
1986-01-31,2.130000
1990-03-21,0.070000
1990-09-21,0.070000
1993-03-24,0.070000
1998-06-30,0.025000
2000-03-31,0.010000
2015-12-23,1.042000
1983-04-25,0.070000
2022-06-30,0.015000
2020-09-30,0.018000
1986-12-17,0.950000
2004-06-30,0.040000
2005-09-30,0.025000
2012-12-21,0.046000
2023-06-30,0.015000
1986-07-25,0.070000
1984-10-23,0.070000
1993-09-22,0.055000
2024-03-28,0.177000
1984-01-24,0.535000
2020-03-31,0.095000
1993-06-23,0.230000
1997-12-26,1.745000
2007-12-18,0.667000
2014-09-30,0.019000
2018-03-29,0.117000
2021-03-31,0.370000
1988-03-28,0.182000
1988-12-27,0.295000
1996-06-28,0.085000
2006-03-31,0.033000
2010-12-20,0.026000
2012-09-28,0.030000
2013-03-28,0.086000
2016-12-22,0.837000
1985-04-24,0.070000
2017-03-31,0.406000
1995-12-27,3.905000
2011-12-22,0.028000
2018-06-29,0.026000
1984-04-16,0.070000
1994-06-28,0.100000
1990-06-25,0.225000
2005-12-19,0.433000
2006-06-30,0.185000
2010-03-31,0.015000
2011-09-30,0.023000
2014-12-22,1.166000
2023-12-15,0.788000
1983-07-19,0.070000
1987-04-22,0.070000
1987-10-21,0.070000
2003-09-30,0.021000
2015-06-30,0.018000
2018-12-19,0.774000
1986-10-22,0.070000
1992-09-25,0.070000
2000-12-15,0.020000
2001-06-29,0.031000
2003-03-31,0.017000
2019-03-29,0.200000
2022-09-30,0.015000
1981-10-15,0.070000
1991-03-22,0.070000
1994-12-20,0.400000
1996-09-30,0.020000
1999-09-30,0.015000
2009-06-30,0.024000
2019-06-28,0.030000
1981-04-20,0.070000
2005-06-30,0.028000
2012-06-29,0.026000
2022-12-19,0.454000
2024-06-28,0.012000
1998-09-30,0.025000
1995-03-22,0.055000
2020-12-18,0.793000
2024-12-19,1.494000
2026-03-31,0.165000
1986-04-22,0.070000
1985-07-24,0.070000
1985-10-23,0.070000
1992-06-24,0.070000
2004-09-30,0.025000
2016-06-30,0.027000
1981-01-23,0.400000
1996-03-29,0.025000
2004-12-17,0.048000
2006-09-29,0.028000
2008-06-30,0.161000
2025-06-30,0.010000
2025-12-16,1.865000
1989-12-20,0.700000
2002-12-13,0.017000
2005-03-31,0.024000
2006-12-18,1.125000
2007-06-29,0.318000
2008-12-22,0.031000
2015-03-31,0.115000
2015-09-30,0.024000
1997-09-30,0.020000
2019-12-19,0.573000
1984-07-24,0.070000
1987-12-23,2.220000
1998-12-28,0.030000
1999-06-30,0.470000
2018-09-28,0.026000
2020-06-30,0.020000
2021-06-30,0.011000
1980-01-25,0.360000
2024-09-30,0.010000
2021-12-20,1.518000
1994-09-27,0.055000
1987-07-22,0.070000
1996-12-27,1.115000
2002-03-28,0.012000
2009-03-31,0.026000
2014-06-30,0.021000
2025-03-31,0.636000
1993-12-21,0.630000
1982-07-21,0.070000
1988-06-22,0.070000
1989-06-23,0.100000
1991-06-21,0.070000
1997-03-31,0.015000
1998-03-31,0.025000
1999-12-20,0.435000
1982-01-21,0.470000
2002-09-30,0.018000
2010-09-30,0.018000
2013-09-30,0.021000
2023-03-31,0.018000
2023-09-29,0.014000
2025-09-30,0.004000
2001-12-10,0.015000
2009-09-30,0.015000
2014-03-31,0.177000
1983-01-25,0.520000
1985-01-28,0.280000
1995-09-26,0.055000
1999-03-31,0.015000
2000-06-30,0.168000
2002-06-28,0.014000
2010-06-30,0.015000
2013-12-23,0.909000
1982-10-20,0.070000
2017-06-30,0.032000
1989-03-23,0.070000
2000-09-29,0.010000
2022-03-31,0.146000
1981-07-21,0.070000
1992-03-25,0.070000
1994-03-23,0.055000
2016-03-31,0.030000
2016-09-30,0.025000
1988-09-13,0.070000
1982-04-20,0.070000
1989-09-25,0.070000
1991-09-26,0.070000
1991-12-17,0.418000
1992-12-22,0.370000
1995-06-27,0.284000
2007-03-30,0.031000
1980-04-23,0.070000
2017-09-29,0.017000
2019-09-30,0.033000
2021-09-30,0.009000
2007-09-28,0.030000
2013-06-28,0.028000
1983-10-19,0.070000
1997-06-30,0.215000
2001-03-30,0.015000
2001-09-28,0.020000
2017-12-21,0.597000
1987-01-23,0.905000
2003-12-18,0.038000
2008-03-31,0.033000
2009-12-22,0.022000
2011-03-31,0.020000
1980-07-18,0.070000