f/overrides/event-backup/devlx-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
2009-12-22,0.017000
2012-12-21,0.346000
1992-12-31,0.040000
2003-12-22,2.354000
2008-12-22,0.060000
2022-12-16,2.806000
2023-12-18,4.907000
2024-12-16,8.162000
1999-12-22,0.385000
2007-12-21,3.418000
2010-12-22,0.140000
1994-12-28,0.160000
1995-12-27,0.240000
2014-12-22,2.794000
2000-12-22,1.118000
2005-12-22,3.053000
1996-12-20,4.035000
2004-12-22,4.625000
2020-12-18,0.409000
2016-12-22,0.309000
2017-12-22,0.881000
2019-12-19,2.621000
2021-12-17,3.386000
1989-12-07,0.140000
1997-12-22,2.240000
2001-12-21,2.744000
2006-12-21,3.273000
2011-12-22,1.806000
2013-12-20,1.156000
2015-12-22,3.219000
2025-12-15,8.408000
1988-12-09,0.070000
1993-12-30,0.035000
2002-12-20,0.843000
2018-12-21,4.383000
1987-12-23,0.045000
1990-12-20,0.155000
1998-12-22,0.163000