f/overrides/event-backup/fnorx-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
2004-12-10,0.220000
2006-12-08,0.800000
2010-12-03,0.285000
2017-12-08,2.170000
2003-12-12,0.150000
2024-12-13,3.482000
2025-12-12,5.735000
1996-12-13,0.050000
2011-12-02,0.609000
2016-12-09,0.770000
2018-12-07,4.599000
2021-12-30,0.136000
2023-12-08,0.004000
2005-12-09,2.840000
2009-12-04,0.340000
2019-12-06,2.191000
1999-12-10,0.510000
2001-12-14,0.060000
2002-12-13,0.120000
2008-12-05,1.060000
1997-12-12,1.250000
2010-04-30,0.022000
2007-12-07,4.010000
2020-12-04,2.171000
2021-12-03,9.437000
2015-12-04,0.617000
2012-12-07,0.630000
2013-12-06,2.626000
2023-12-27,0.026000
2000-12-15,0.250000