f/overrides/event-backup/lbisx-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
2011-12-09,0.184000
2013-12-11,1.116000
2015-12-09,1.220000
2019-02-28,0.034000
2020-12-04,0.556000
2023-12-13,0.374000
2019-04-30,0.037000
2019-12-05,2.197000
2011-12-28,0.150000
2012-12-12,0.885000
2014-12-10,1.780000
2016-12-07,1.324000
2018-12-06,1.961000
2019-03-29,0.038000
2021-07-12,0.840000
2021-12-03,2.557000
2022-12-13,2.486000
2025-12-11,2.741000
2019-01-31,0.038000
2017-12-06,1.742000
2024-12-12,2.275000