f/overrides/event-backup/dissx-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
2021-12-22,3.595000
1997-12-24,0.174000
2008-12-29,1.260000
2018-03-20,0.014000
2020-03-24,0.015000
2011-12-28,0.674000
2014-03-18,0.020000
2023-12-21,2.449000
2025-12-23,3.418000
1999-12-17,0.633000
2002-10-31,0.045000
2006-03-30,0.008000
2006-12-27,1.065000
2012-12-27,0.934000
2013-12-27,1.253000
1998-12-24,0.549000
2004-12-23,0.635000
2007-03-29,0.008000
2010-12-29,0.548000
2001-12-18,0.131000
2011-03-30,0.001000
2012-03-27,0.005000
2016-03-22,0.014000
2017-12-27,2.321000
2019-12-26,2.381000
2003-12-15,0.096000
2005-12-29,0.354000
2008-03-28,0.014000
2009-03-30,0.007000
2024-12-23,3.885000
2019-03-19,0.008000
2009-12-29,0.128000
2015-03-24,0.011000
2016-12-28,1.942000
2017-03-21,0.010000
2007-12-27,2.091000
2013-03-19,0.010000
2014-12-29,2.296000
2015-12-29,2.868000
2000-12-13,1.490000
2002-06-28,0.049000
2002-12-11,0.073000
2007-06-29,0.002000
2020-12-24,2.229000
2022-12-22,3.407000
2005-03-31,0.003000
2018-12-26,3.324000