f/overrides/event-backup/iif-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
2000-12-20,1.603000
2001-06-27,0.871000
2004-06-28,0.020000
2011-06-28,1.178000
2015-12-16,0.041000
2016-06-28,0.449000
2004-12-21,0.072000
2022-12-15,3.983000
2024-12-13,2.697000
2017-12-21,4.320000
2023-12-14,3.136000
2025-12-19,1.985000
2010-12-21,2.473000
2003-12-22,0.179000
2005-12-23,0.209000
2008-06-26,8.619000
2008-12-17,1.776000
2003-06-26,0.019000
2007-06-27,4.904000
2007-12-19,11.903000
2017-06-28,0.727000
2018-06-28,2.271000
2020-12-17,0.004000
2021-12-16,1.001000
1994-12-23,0.167000
2001-12-20,0.193000
2005-06-28,0.076000
2006-12-20,4.948000
2016-12-21,0.694000
2018-12-20,3.825000
2019-12-19,0.028000