f/overrides/event-backup/cbsax-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
2024-12-11,3.472000
2018-12-06,5.412000
2019-12-12,2.138000
2021-12-10,6.039000
2013-12-05,3.075000
2014-12-04,4.988000
2015-12-03,4.376000
2010-04-26,0.041000
2012-12-07,0.766000
2016-12-07,1.520000
2017-12-06,3.506000
2020-12-10,4.557000
2005-12-15,0.310000
2006-12-11,1.463000
2008-12-08,0.490000
2025-12-10,3.323000
2007-12-10,3.858000
2011-12-06,0.826000