f/overrides/event-backup/mxe-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
2006-12-27,3.033000
2018-12-18,0.001000
2015-12-28,0.560000
1999-12-21,0.121000
1991-12-20,0.970000
1997-12-23,3.560000
2010-12-23,0.023000
2024-12-23,0.298000
1996-12-24,1.110000
2023-12-27,0.301000
1992-12-24,1.530000
1994-12-23,0.420000
1998-12-22,0.930000
2012-12-19,0.190000
2019-12-18,0.120000
1995-12-27,0.080000
2007-12-26,7.412000
2008-12-23,6.775000
2025-12-16,0.234000
1990-12-21,0.580000
2003-12-01,0.015000
2005-12-20,4.570000
2014-12-26,0.006000
2017-12-18,0.048000
1993-12-27,2.090000
2000-11-20,0.620000
2004-12-01,0.060000
2013-12-26,2.126000