f/overrides/event-backup/eem-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
2003-12-22,0.077000
2010-12-21,0.359000
2011-06-22,0.461000
2025-06-16,0.452000
2023-12-20,0.748000
2025-12-16,0.763000
2026-06-15,0.351000
2014-06-25,0.341000
2017-06-20,0.192000
2021-12-13,0.707000
2023-06-07,0.310000
2012-12-27,0.014000
2013-12-18,0.366000
2015-12-21,0.501000
2016-06-22,0.266000
2003-12-31,0.013444
2008-12-23,0.340000
2010-06-23,0.262000
2012-06-21,0.468000
2020-06-15,0.230000
2022-06-09,0.362000
2013-06-27,0.493000
2014-12-17,0.535000
2015-06-25,0.301000
2019-12-16,0.929000
2007-12-24,0.649000
2009-12-22,0.323000
2009-12-29,0.012000
2010-12-29,0.025000
2022-12-13,0.584000
2020-12-14,0.519000
2005-12-23,0.329333
2011-12-20,0.347000
2016-12-21,0.396000
2018-06-19,0.290000
2024-12-17,0.727000
2008-06-25,0.517333
2009-06-23,0.247000
2017-12-19,0.697000
2018-12-18,0.584000
2004-12-23,0.268111
2021-12-30,0.026000
2024-06-11,0.290000
2006-12-20,0.524333
2012-12-18,0.262000
2019-06-17,0.311000
2021-06-10,0.241000