f/overrides/event-backup/bbh-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
2021-12-20,0.397000
2008-05-21,1.000000
2009-04-01,27.858667
2009-09-09,0.001333
2011-08-16,0.060333
2011-11-15,0.060333
2020-12-21,0.608000
2024-12-23,1.252000
2002-02-27,0.002667
2006-04-26,2.560000
2011-05-26,0.106667
2016-12-19,0.327000
2018-12-20,0.551000
2007-03-14,0.003667
2011-09-07,0.001667
2011-03-09,0.007333
2007-06-27,2.900000
2012-12-24,0.184000
2002-07-17,0.630000
2009-03-11,0.005333
2025-12-22,0.957000
2009-10-30,0.449667
2011-04-26,3.453333
2015-12-21,0.337000
2023-12-18,0.713000
2017-12-18,0.683000
2019-12-23,0.472000
2022-12-19,0.749000
2007-02-05,0.453333
2008-03-12,0.004333
2008-12-03,1.089000
2009-10-29,0.460000
2013-12-23,0.003000