f/overrides/event-backup/leoox-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
2017-08-21,0.184000
2022-08-18,0.529000
2025-08-15,0.063000
2020-08-20,0.040000
2015-12-21,0.856000
2016-12-22,0.107000
2017-12-21,0.786000
2018-08-21,0.023000
2018-12-21,0.170000
2019-08-21,0.088000
2020-12-22,0.511000
2021-08-19,0.155000
2021-12-22,0.202000
2022-12-22,0.402000
2024-08-16,0.258000
2023-12-21,0.114000
2024-12-20,0.169000