f/overrides/event-backup/gtsax-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
1998-12-18,0.499000
2005-12-16,2.252000
2013-12-13,2.188000
2015-12-11,3.237000
2018-12-14,3.028000
1997-12-11,0.272000
2006-12-15,2.240000
2017-12-13,3.444000
2019-12-13,3.166000
2022-12-16,0.813000
2000-12-15,1.807000
2007-12-14,3.524000
2008-12-12,0.878000
2011-12-09,0.523000
2012-12-07,2.732000
2025-12-18,2.953000
1999-12-17,0.540000
2014-12-12,6.558000
2016-12-13,3.055000
2020-05-13,1.269000
2020-12-15,5.351000
2021-12-16,14.137000
2001-12-14,0.029000