f/overrides/event-backup/hnlvx-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
2022-06-29,0.128000
2022-12-19,0.853000
2023-12-19,0.675000
2024-09-30,0.070000
2016-06-29,0.065000
2016-12-19,0.500000
2025-12-19,4.027000
2017-12-18,0.471000
2024-12-20,1.499000
2024-03-28,0.066000
2025-09-30,0.087000
2026-03-31,0.052000
2018-06-28,0.073000
2019-06-27,0.084000
2020-12-17,0.601000
2024-06-28,0.064000
2025-03-31,0.104000
2020-06-29,0.078000
2023-06-30,0.076000
2026-06-30,0.070000
2021-12-20,0.700000
2023-09-29,0.070000
2025-06-30,0.072000
2018-12-17,0.312000
2021-06-29,0.091000
2019-12-16,0.081000
2023-03-31,0.071000
2017-06-29,0.072000