f/overrides/event-backup/nure-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
2018-03-26,0.230000
2019-09-26,0.236000
2023-03-29,0.262000
2023-06-28,0.262000
2025-09-29,0.292000
2017-03-27,0.232000
2017-12-26,0.329000
2025-06-27,0.366000
2019-12-27,0.250000
2020-12-17,0.395000
2024-06-27,0.231000
2025-03-28,0.285000
2026-03-30,0.381000
2018-06-26,0.202000
2023-09-27,0.276000
2023-12-14,0.354000
2021-03-29,0.151000
2021-09-28,0.127000
2017-09-26,0.236000
2018-12-26,0.381000
2021-06-28,0.116000
2024-09-27,0.300000
2024-12-18,0.297000
2026-06-29,0.300000
2016-12-23,0.120000
2016-12-28,0.120000
2022-03-29,0.167000
2022-06-28,0.182000
2024-03-26,0.288000
2025-12-18,0.342000
2019-06-26,0.229000
2021-12-16,0.152000
2020-03-27,0.225000
2017-06-26,0.208000
2018-09-25,0.214000
2020-09-28,0.149000
2022-09-28,0.194000
2022-12-15,0.255000
2019-03-27,0.278000
2020-06-26,0.152000