f/overrides/event-backup/epp-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
2012-12-18,1.106000
2013-06-27,0.942000
2013-12-18,0.883000
2018-06-19,0.868000
2009-12-22,0.802000
2010-06-23,0.565000
2010-12-21,0.986000
2013-12-27,0.082000
2015-06-25,0.952000
2015-12-21,0.927000
2007-12-20,2.429000
2017-12-19,1.228000
2019-06-17,0.842000
2020-06-15,0.543000
2020-12-14,0.547000
2023-06-07,0.815000
2023-12-20,0.966000
2026-06-15,0.824000
2014-06-25,0.771000
2017-06-20,0.756000
2016-06-22,0.661000
2022-06-09,1.160000
2022-12-13,0.709000
2025-06-16,0.859000
2003-12-22,0.167667
2008-06-25,0.143000
2018-12-18,1.167000
2021-06-10,0.621000
2024-12-17,0.967000
2025-12-16,1.046000
2002-12-23,0.294000
2008-12-23,0.487000
2012-06-21,0.876000
2014-12-17,1.132000
2003-12-16,0.073333
2004-12-23,1.004333
2005-12-23,1.232667
2006-12-20,1.732333
2009-06-23,0.627000
2011-06-22,0.743000
2011-12-20,0.973000
2016-12-21,0.906000
2019-12-16,0.956000
2021-12-13,1.269000
2021-12-30,0.295000
2024-06-11,0.701000