f/overrides/event-backup/evclx-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
2021-10-21,0.092000
2023-12-28,0.204000
2024-07-25,0.195000
2017-12-29,0.519000
2018-12-28,0.647000
2022-12-29,0.128000
2023-07-20,0.180000
2026-07-23,0.169000
2016-12-12,0.103000
2019-11-21,0.172000
2019-12-26,0.222000
2020-11-23,0.192000
2021-12-29,1.249000
2025-07-24,0.182000
2025-12-30,0.153000
2022-07-21,0.099000
2024-12-27,0.182000