f/overrides/event-backup/bdskx-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
2018-07-19,0.270000
2019-04-10,0.124000
2020-07-16,0.031000
2020-12-07,0.437000
2022-12-08,0.105000
2024-12-11,0.111000
2026-07-22,1.057000
2016-12-06,0.086000
2017-07-20,0.215000
2019-07-18,0.035000
2023-12-07,0.124000
2025-07-17,0.068000
2025-12-11,0.892000
2016-07-21,0.010000
2019-12-05,0.108000
2021-07-15,1.019000
2021-12-07,1.211000
2017-12-04,0.164000
2018-12-06,0.405000
2022-07-14,0.305000
2023-07-20,0.044000
2024-07-18,0.038000