f/overrides/event-backup/bufgx-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
1997-12-26,1.051000
2006-12-19,0.716000
2007-12-19,0.104000
2010-12-20,0.064000
2011-12-20,0.452000
2020-12-18,1.531000
2021-12-03,3.362000
2024-12-05,2.980000
1995-12-29,0.111000
1997-06-20,0.030000
1998-12-17,0.530000
2004-06-18,0.028000
2006-06-20,0.027000
2007-06-19,0.792000
2008-06-18,0.024000
2015-12-18,5.309000
2016-12-20,1.651000
1998-06-19,0.040000
2003-06-18,0.003000
2004-12-20,0.086000
2012-12-18,0.124000
2018-12-18,7.541000
2022-12-05,1.068000
1996-03-29,0.036000
1996-12-27,0.660000
1999-12-16,0.935000
2000-12-21,2.850000
2005-06-20,0.048000
2023-12-05,1.675000
2025-12-05,2.290000
2014-12-18,4.672000
2005-12-20,0.021000
2017-12-19,5.970000
2019-12-18,3.432000
2009-12-18,0.100000
2013-12-18,2.250000