f/overrides/event-backup/iev-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
2006-12-21,1.041500
2010-12-20,0.254000
2013-06-25,0.892000
2013-12-17,0.214000
2021-06-10,0.872000
2025-12-16,0.751000
2000-12-13,0.004500
2004-12-23,0.674000
2007-12-24,1.566500
2012-12-17,0.236000
2020-06-15,0.494000
2021-12-30,0.064000
2025-06-16,1.122000
2014-06-24,1.325000
2014-12-19,0.287000
2016-12-22,0.291000
2018-06-19,1.057000
2020-12-14,0.348000
2023-12-20,0.359000
2008-12-22,0.373000
2009-12-21,0.291000
2012-06-20,0.953000
2015-06-24,0.898000
2016-06-21,0.904000
2019-06-17,1.130000
2000-09-20,0.088000
2001-03-12,0.044000
2001-10-02,0.099500
2002-12-23,0.531000
2003-12-16,0.132500
2011-06-21,0.898000
2021-12-13,0.590000
2026-06-15,1.281000
2001-06-11,0.251500
2001-12-24,0.070500
2010-06-21,0.726000
2011-12-19,0.316000
2015-12-21,0.228000
2023-06-07,1.103000
2024-06-11,1.235000
2024-12-17,0.381000
2009-06-22,0.705000
2019-12-16,0.306000
2022-12-13,0.201000
2003-12-22,0.278000
2005-12-23,0.939500
2008-06-23,1.312000
2017-06-20,0.824000
2017-12-21,0.307000
2018-12-18,0.286000
2022-06-09,1.184000