f/overrides/event-backup/cee-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
1993-12-21,0.300000
1998-11-12,0.110000
2019-12-27,1.463000
1992-12-21,0.300000
1997-08-29,0.020000
2004-12-20,0.170000
2007-12-19,10.257000
2016-12-28,0.321000
1994-12-22,0.200000
2005-12-16,0.330000
2010-12-29,0.264000
2022-12-29,0.239000
1996-12-17,1.900000
1997-11-13,6.550000
2001-11-15,0.230000
2009-12-29,0.651000
2015-12-29,0.486000
2008-12-11,0.070000
2023-12-28,0.365000
2014-12-29,0.975000
1995-12-22,0.380000
1998-08-28,0.020000
1999-11-12,0.110000
2003-12-18,0.220000
2013-12-27,2.491000
1990-11-28,0.260000
1991-08-29,0.020000
2006-12-19,5.516000
2011-12-28,2.486000
2021-12-29,0.953000
2025-12-30,0.387000
2012-12-27,1.087000
2017-12-28,0.562000
2018-12-28,1.008000
2020-12-29,0.919000
2024-12-30,0.353000