f/overrides/event-backup/gcasx-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
2015-11-24,1.722000
2018-11-28,2.214000
2005-12-20,2.057000
2009-09-28,0.021000
2011-11-28,0.754000
2012-11-28,1.002000
2016-11-28,1.988000
2017-11-28,3.120000
2019-11-19,10.044000
2020-11-20,9.560000
2023-10-17,3.627000
2024-10-29,2.877000
2004-12-20,1.150000
2007-11-28,1.545000
2014-11-25,0.919000
2021-11-26,6.393000
2022-11-28,3.605000
2025-10-29,1.795000
2006-12-20,2.450000
2008-11-26,1.432000
2012-12-27,0.098000
2013-11-26,1.419000