f/overrides/event-backup/bacix-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
2017-12-11,0.320000
2023-07-20,0.222000
2025-12-11,0.238000
2024-12-10,0.196000
2006-12-07,0.399000
2009-12-10,0.102000
2018-12-06,0.311000
2021-07-15,0.112000
2021-12-07,0.140000
2022-12-08,0.188000
2024-07-18,0.154000
2026-07-22,0.151000
2007-12-06,0.541000
2012-12-12,0.003000
2020-07-16,0.110000
2020-12-07,0.137000
2023-12-07,0.222000
2022-07-14,0.140000
2008-12-11,1.622000
2010-12-09,0.121000
2013-12-05,0.107000
2014-12-17,0.242000
2015-12-15,0.235000
2016-12-13,0.278000
2019-12-05,0.303000
2025-07-17,0.164000