f/overrides/event-backup/brf-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
2015-12-21,0.399000
2018-12-20,0.511000
2018-12-27,0.068000
2023-12-18,0.882000
2013-12-23,0.530000
2013-12-27,0.018000
2017-12-18,1.063000
2020-12-21,0.353000
2021-12-20,0.488000
2011-12-23,5.132000
2012-12-24,0.616000
2024-12-23,0.448000
2025-12-22,0.889000
2009-12-23,0.451000
2010-12-23,3.575000
2014-12-22,0.892000
2016-12-19,0.676000
2019-12-23,0.697000
2022-12-19,0.557000