f/overrides/event-backup/bniex-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
2008-12-18,0.706000
2018-12-19,0.154000
2021-12-20,1.057000
2001-12-17,1.868000
2003-02-21,0.041000
2007-12-19,1.358000
2011-12-16,0.137000
2012-12-17,0.240000
2025-12-17,0.232000
2002-05-22,0.061000
2002-11-22,0.047000
2004-12-22,0.107000
2005-12-21,0.469000
2024-12-17,0.138000
1998-06-16,0.058000
2001-06-20,0.042000
2010-12-17,0.264000
2014-12-17,0.108000
2019-12-19,0.128000
2003-01-23,0.047000
2013-12-17,0.190000
2017-12-19,0.119000
2022-12-19,1.135000
2023-12-18,0.061000
1997-12-11,0.100000
2006-12-21,0.633000
2009-12-18,0.464000
1998-12-03,0.035000
1999-06-16,0.070000
2002-04-23,0.059000
2020-12-18,0.124000
2000-12-12,0.769000
2002-12-23,0.320000
2003-12-23,0.218000
2015-12-16,0.092000
2016-12-20,0.168000