f/overrides/event-backup/mueax-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
2012-12-11,0.176000
2014-12-11,0.979000
2018-12-18,2.675000
2003-12-10,0.055000
2013-12-10,0.309000
2020-12-15,2.075000
2023-12-14,1.176000
2004-12-09,0.057000
2005-12-08,0.106000
2015-12-10,0.711000
2017-12-12,0.901000
2022-12-13,2.318000
2025-12-11,2.709000
2001-12-10,0.024000
2003-02-28,0.027000
2002-12-10,0.026000
2003-01-31,0.027000
2009-12-10,0.367000
2016-12-13,0.232000
1999-12-10,2.368000
2000-12-11,0.069000
2007-12-11,0.197000
2008-05-28,0.298000
2021-12-14,5.298000
1998-12-10,1.506000
2006-12-12,0.082000
2011-12-08,0.094000
1997-12-23,0.182000
2010-12-09,0.130000
2024-12-12,3.694000
2008-12-16,0.102000
2019-12-17,1.385000