f/overrides/event-backup/bgeix-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
2022-06-21,0.048000
2023-12-19,0.116000
1992-12-23,0.013000
1993-12-22,0.012000
2002-12-13,0.018000
2007-06-12,0.121000
2007-12-28,0.111000
2020-06-16,0.004000
2024-06-18,0.038000
1988-12-28,0.032000
1989-12-27,0.048000
1990-12-19,0.078000
1998-06-26,0.026000
2006-06-13,0.047000
2009-12-29,0.126000
2025-12-16,0.162000
1998-12-18,0.023000
2000-06-30,0.026000
2008-12-29,0.001000
2010-12-28,1.596000
2012-12-26,0.204000
2022-12-21,0.091000
2003-06-17,0.045000
2019-12-20,0.097000
2024-12-17,0.127000
2002-06-28,0.019000
2010-12-14,1.633000
2016-12-27,0.836000
1995-12-21,0.009000
1996-12-18,0.696000
1997-06-27,0.055000
1999-12-17,0.026000
2021-06-22,0.071000
2026-06-09,0.087000
2023-06-20,0.050000
2025-06-24,0.100000
1991-12-31,0.018000
1994-12-22,0.048000
2008-12-16,1.945000
2011-12-13,1.368000
2014-12-23,0.249000
2021-12-21,0.177000
1997-12-19,0.239000
1999-06-25,0.026000
2003-12-31,0.161000
2020-12-22,0.070000