f/overrides/event-backup/dtlgx-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
2004-12-29,0.029000
2007-12-26,6.913000
2014-12-22,6.289000
2017-12-15,3.562000
1997-12-30,0.580000
1998-12-28,0.017000
1999-12-03,0.437000
2001-12-28,0.076000
2018-12-14,5.652000
1996-12-27,2.754000
2016-08-16,0.184000
2022-12-13,5.263000
2025-12-11,10.710000
2012-12-14,1.078000
2021-12-13,10.055000
1994-12-30,0.097000
1998-12-03,1.951000
2012-12-28,0.071000
1992-12-31,0.070000
1993-12-31,0.231000
1995-12-21,0.115000
2002-12-30,0.043000
2010-12-29,0.015000
2020-12-11,9.347000
2013-12-16,3.457000
2019-12-13,3.911000
2024-12-12,5.736000
2000-11-28,0.511000
2008-12-23,0.404000
2015-12-15,4.227000
2016-12-15,3.994000
2016-12-29,0.013000
2023-12-27,0.031000