f/overrides/event-backup/gcblx-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
2001-12-27,0.052000
2013-12-30,0.031000
2018-12-28,0.568000
1995-06-23,0.043000
1995-12-20,0.085000
2002-12-30,0.108000
2023-12-28,0.959000
2000-06-29,0.070000
2005-12-29,0.012000
2007-06-28,0.109000
2020-12-30,1.147000
2022-12-29,0.577000
1999-06-29,0.109000
2001-06-28,0.112000
2009-12-30,0.090000
2010-12-30,0.077000
2018-06-28,0.026000
1993-06-25,0.030000
2009-06-29,0.105000
2005-06-29,0.031000
2014-06-26,0.061000
2021-12-30,1.492000
2025-12-30,1.635000
1992-06-23,0.015000
2003-12-30,0.080000
2012-06-28,0.043000
2013-06-27,0.036000
2020-06-29,0.056000
2023-06-29,0.049000
1994-06-24,0.043000
1994-12-21,0.053000
2014-12-30,1.192000
2019-06-27,0.053000
1992-12-29,0.034000
2000-12-28,3.513000
2010-06-29,0.088000
2017-12-28,0.335000
2026-06-29,0.199000
1997-12-23,1.439000
1999-12-23,0.004000
2002-06-27,0.067000
2004-06-29,0.039000
2008-06-27,0.112000
2017-06-29,0.005000
2011-12-29,0.059000
2025-06-27,0.085000
2006-12-28,0.097000
2008-12-30,0.168000
2012-12-28,0.090000
1998-12-23,0.869000
1998-12-29,0.003000
1997-06-26,0.041000
2019-12-30,0.520000
1993-12-21,0.030000
1996-06-26,0.013000
1996-12-27,1.655000
2004-12-30,0.026000
2007-12-28,0.162000
2024-12-30,2.319000
2003-06-27,0.059000
2006-06-29,0.017000
2011-06-29,0.059000
2015-12-30,0.681000
2016-12-29,0.504000
2024-06-27,0.072000