f/overrides/event-backup/lagwx-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
1984-02-24,0.050000
1991-12-30,0.400000
1993-12-30,0.880000
1994-12-30,0.568000
1999-02-12,0.320000
2004-08-06,0.043000
2020-11-24,2.955000
1981-02-26,0.063000
1996-02-15,0.160000
1999-11-18,0.369000
2006-11-21,3.007000
2011-11-22,1.263000
1980-02-27,0.063000
1986-02-14,0.390000
1989-02-10,0.030000
1991-02-15,0.020000
1993-02-24,0.150000
2012-11-20,1.709000
1982-02-24,0.053000
1985-02-25,0.020000
2000-02-16,0.724000
2014-11-21,4.298000
2018-11-20,6.245000
2021-11-23,3.341000
2024-11-26,0.006000
1992-12-30,0.320000
1994-02-18,0.240000
1996-11-22,1.620000
1997-02-13,0.210000
1997-11-13,1.380000
1998-02-10,0.048000
2015-11-24,1.851000
2007-11-20,2.442000
2019-11-21,4.489000
1989-12-29,0.190000
2005-11-22,0.208000
1987-12-31,1.280000
1992-02-18,0.170000
1995-02-16,0.125000
1995-12-29,2.740000
2013-11-22,5.364000