f/overrides/event-backup/fsoax-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
1996-12-20,0.370000
2001-01-05,0.110000
2002-01-04,0.070000
2004-12-17,0.150000
2005-12-16,7.062000
2010-12-10,0.040000
2000-12-22,1.190000
2006-01-06,0.300000
2019-12-27,1.805000
2011-12-16,0.120000
2013-12-13,0.233000
2015-12-18,0.407000
2016-12-27,8.072000
2024-12-26,5.641000
2010-04-30,0.010000
2010-08-12,0.006000
2012-12-14,0.068000
2001-12-21,0.160000
2007-01-05,0.580000
2008-12-12,0.116000
2012-12-27,0.008000
2014-12-22,0.313000
2020-12-29,0.285000
2007-12-14,4.532000
2018-12-26,4.329000
2005-01-07,0.105000
2006-12-15,3.690000
2022-12-27,0.926000
2025-12-26,4.437000
2017-12-26,3.278000
2021-12-28,3.677000
2023-12-26,1.292000