f/overrides/event-backup/iceux-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
2012-12-07,0.616000
2005-12-28,2.814000
2013-12-18,0.364000
1999-06-30,0.384000
2000-12-27,0.532000
2003-09-30,0.062000
2007-06-27,0.631000
2020-12-08,0.273000
1998-12-29,0.001000
2001-06-29,0.184000
2002-03-28,0.067000
2022-12-12,0.436000
2009-06-26,0.534000
2000-06-30,0.168000
2002-09-30,0.035000
2010-12-13,0.103000
2014-12-15,1.085000
2006-12-22,1.513000
2000-05-16,3.184000
2008-06-25,0.612000
2010-06-29,0.358000
2019-12-10,1.012000
2025-12-09,0.964000
1998-03-20,0.825000
2002-06-28,0.175000
2015-12-07,0.491000
2024-12-10,0.640000
1998-06-30,0.200000
1998-09-30,0.060000
2002-12-31,0.015000
2006-06-29,0.218000
2010-04-30,0.036000
2021-12-07,1.061000
2004-06-30,0.209000
2004-12-31,0.269000
2023-12-11,0.670000
2016-12-13,1.054000
2001-03-14,0.123000
2003-06-30,0.221000
2007-12-17,4.577000
2018-12-11,0.597000
2000-03-31,0.072000
2008-12-11,0.340000
2017-12-13,0.486000
1999-03-31,0.051000
2001-09-28,0.026000
2005-06-30,0.231000
2009-12-14,0.039000
1999-12-23,1.234000
2000-09-29,0.049000
2003-03-31,0.131000
2011-06-29,0.495000
2011-12-07,0.063000