f/overrides/event-backup/eea-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
2010-04-28,0.010000
2015-05-14,0.099000
2019-12-27,0.225000
2024-12-30,0.141000
1990-11-28,0.250000
1991-08-29,0.100000
1993-12-21,0.220000
2000-11-16,2.180000
2000-08-30,0.310000
2004-12-20,0.025000
1995-12-22,0.930000
1998-08-28,0.620000
2011-05-17,0.008000
1999-11-17,1.190000
2009-05-07,0.234000
1997-11-13,2.850000
1998-11-12,3.220000
1992-12-21,0.380000
2021-05-14,0.033000
2023-12-28,0.139000
2024-05-23,0.038000
1991-12-20,0.150000
2006-12-19,0.290000
2008-05-02,0.526000
2021-12-29,1.463000
2012-12-27,0.152000
2014-05-15,0.111000
2023-05-12,0.033000
2026-05-26,0.418000
2010-12-29,0.045000
2016-12-28,0.055000
2017-12-28,0.035000
1989-11-28,0.250000
1994-12-22,0.710000
1996-08-29,0.130000
1999-08-30,0.560000
2022-05-13,0.725000
2025-05-27,0.030000
2025-12-30,0.165000
1997-08-29,0.310000
2005-12-20,0.060000
2006-05-03,0.090000
2015-12-29,0.070000
1988-11-15,0.057000
2017-05-17,0.051000
2018-05-18,0.030000
1987-08-24,0.450000
2001-11-15,0.060000
2012-05-17,0.135000
2016-05-17,0.020000
2004-05-04,0.039000
2007-12-19,1.000000
2018-12-28,0.043000
2020-12-29,0.069000
1994-08-31,0.090000
2007-05-01,0.250000
2019-05-17,0.291000
2022-12-29,0.145000
1996-12-17,1.060000
2002-11-15,0.010000
2009-12-29,0.100000
2020-05-15,0.124000