f/overrides/event-backup/gceqx-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
2009-06-29,0.101000
2013-06-27,0.073000
2015-12-30,0.488000
2017-12-28,0.286000
2020-06-29,0.119000
2023-12-28,0.025000
2025-06-27,0.037000
1996-12-27,0.025000
1997-12-23,0.013000
2011-06-29,0.089000
2013-12-30,0.101000
2015-06-29,0.106000
2019-12-30,0.239000
2023-06-29,0.074000
1995-12-20,0.006000
2012-12-28,0.124000
2014-12-30,0.437000
2016-06-28,0.135000
2025-12-30,4.421000
2003-12-30,0.015000
2007-12-28,1.125000
2008-06-27,0.077000
2008-12-30,0.121000
2020-12-30,0.565000
2022-06-29,0.009000
1998-12-23,0.210000
2004-12-30,0.106000
2011-12-29,0.104000
2014-06-26,0.070000
2018-12-28,0.749000
1996-06-26,0.018000
1999-12-23,0.078000
2001-12-27,1.319000
2007-06-28,0.089000
2010-06-29,0.071000
2010-12-30,0.111000
2012-06-28,0.093000
2016-12-29,0.630000
1997-06-26,0.005000
2022-12-29,0.267000
2017-06-29,0.080000
2009-12-30,0.077000
2024-06-27,0.102000
2024-12-30,0.898000
2000-12-28,0.805000
2006-12-28,0.101000
2018-06-28,0.108000
2019-06-27,0.100000
2021-12-30,0.856000
2005-12-29,0.033000