f/overrides/event-backup/newfx-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
2024-12-19,2.821000
2001-12-19,0.545000
2018-12-21,1.297000
2005-12-27,0.728000
2006-12-26,3.147000
2023-12-14,1.842000
2003-12-18,0.585000
2014-12-26,3.123000
2021-12-16,5.930000
2022-12-15,0.589000
2000-12-14,0.370000
2004-12-17,0.546000
2009-12-22,0.568000
2011-12-27,0.757000
2017-12-21,1.268000
2019-12-20,2.575000
2008-12-23,0.506000
2020-12-17,0.085000
2025-12-18,5.322000
2002-12-19,0.252000
2007-12-12,4.968000
2010-12-27,0.776000
2012-12-26,0.713000
2015-12-23,0.300000
2016-12-22,0.475000
1999-12-15,0.200000
2013-12-26,1.180000