f/overrides/event-backup/ilcv-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
2024-06-11,0.366000
2005-06-21,0.217500
2011-06-23,0.209000
2012-12-19,0.254500
2016-12-21,0.352500
2017-06-27,0.298500
2020-03-25,0.444000
2023-06-07,0.305000
2009-06-23,0.192500
2010-06-23,0.186500
2015-09-25,0.321500
2020-12-14,0.404500
2008-06-24,0.293000
2018-12-17,0.392500
2022-12-13,0.403000
2025-09-16,0.404000
2005-03-28,0.179000
2011-09-26,0.219000
2019-03-20,0.353500
2024-09-25,0.463000
2008-12-24,0.238000
2022-09-26,0.467000
2006-12-21,0.286000
2007-12-27,0.366000
2011-03-25,0.169500
2016-09-26,0.313500
2018-03-22,0.328500
2007-03-26,0.296000
2011-12-22,0.257500
2014-06-24,0.261000
2009-03-25,0.238000
2014-09-24,0.269000
2019-06-17,0.339000
2022-06-09,0.270000
2023-03-23,0.365000
2026-06-15,0.391000
2016-03-23,0.318000
2006-06-23,0.245000
2006-09-27,0.203000
2007-09-26,0.339000
2009-12-24,0.205500
2010-09-24,0.193000
2012-06-19,0.223500
2013-09-24,0.319000
2017-09-26,0.314000
2017-12-19,0.335500
2020-06-15,0.400000
2021-03-25,0.356500
2021-09-24,0.390000
2008-03-25,0.292500
2010-12-23,0.218000
2013-06-26,0.165500
2014-03-25,0.231000
2016-06-21,0.315500
2018-06-26,0.347500
2023-12-20,0.482000
2004-12-27,0.221500
2009-09-23,0.189500
2014-12-24,0.290000
2015-03-25,0.282000
2019-12-16,0.447500
2025-03-18,0.383000
2010-03-25,0.161500
2013-03-25,0.214500
2013-12-23,0.311000
2021-12-13,0.404000
2025-06-16,0.401000
2026-03-17,0.357000
2005-12-23,0.226000
2006-03-27,0.223500
2012-03-26,0.215500
2015-06-24,0.303500
2019-09-24,0.441500
2023-09-26,0.448000
2024-12-17,0.434000
2005-09-26,0.217500
2021-06-10,0.251000
2024-03-21,0.353000
2004-09-27,0.208000
2007-06-29,0.305000
2012-09-25,0.240000
2015-12-24,0.325000
2018-09-26,0.344500
2022-03-24,0.328000
2008-09-25,0.291000
2017-03-24,0.278000
2020-09-23,0.413500
2025-12-16,0.484000