f/overrides/event-backup/jhdrx-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
2026-06-26,0.034000
2021-12-20,0.037000
2023-03-29,0.033000
2023-06-28,0.049000
2023-09-27,0.046000
2025-09-26,0.049000
2024-06-26,0.045000
2024-09-26,0.044000
2025-03-27,0.036000
2021-03-29,0.003000
2021-12-30,0.003000
2022-03-29,0.026000
2022-12-20,0.065000
2023-12-20,0.063000
2025-06-26,0.044000
2025-12-18,0.043000
2021-09-28,0.030000
2022-12-13,0.817000
2026-03-27,0.031000
2021-06-28,0.019000
2022-06-28,0.044000
2022-09-28,0.047000
2024-03-26,0.037000
2024-12-19,0.057000