f/overrides/event-backup/oakex-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
2021-12-16,0.318000
2025-12-11,1.150000
1998-11-23,0.205000
2004-12-09,0.648000
2006-12-14,3.998000
2009-12-17,0.164000
2013-12-19,0.553000
2015-12-17,0.717000
1996-12-11,0.436000
2000-11-17,0.825000
2001-11-15,0.303000
2023-12-14,0.357000
1999-11-19,0.704000
2018-12-13,1.112000
2020-12-10,0.316000
2007-12-13,5.843000
2011-12-15,0.018000
2019-12-12,0.034000
2002-11-21,0.364000
2005-12-15,4.244000
2008-12-18,1.061000
2014-12-18,1.155000
2022-12-15,0.315000
2024-12-12,1.139000
1997-11-18,1.393000
2012-12-13,0.210000
2003-11-20,0.117000
2010-12-16,0.078000
2016-11-28,0.451000
2017-12-14,0.645000