f/overrides/event-backup/fbsix-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
2016-12-15,2.595000
2018-12-17,5.122000
2019-01-31,0.030000
2019-12-16,2.812000
2020-12-15,1.302000
2019-02-28,0.028000
2022-12-20,0.446000
2014-12-15,7.973000
2015-12-15,6.252000
2017-12-15,3.338000
2019-03-29,0.025000
2021-12-15,5.106000
2022-12-15,1.075000
2024-12-20,2.582000
2019-04-30,0.031000
2023-12-20,0.905000
2025-12-22,1.748000