f/overrides/event-backup/jenyx-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
2024-06-13,0.124000
2024-09-11,0.134000
2025-03-13,0.087000
2019-03-14,0.160000
2019-09-18,0.172000
2023-09-14,0.190000
2020-03-13,0.173000
2023-03-16,0.169000
2020-12-15,5.260000
2024-03-14,0.143000
2017-12-20,1.251000
2020-06-12,0.172000
2021-09-10,0.165000
2022-12-15,1.383000
2018-03-14,0.126000
2018-06-20,0.175000
2021-06-10,0.142000
2025-11-13,16.880000
2017-06-22,0.153000
2019-06-14,0.171000
2019-12-18,3.871000
2020-09-17,0.174000
2021-03-16,0.173000
2021-12-15,4.177000
2022-06-16,0.175000
2024-11-13,6.927000
2017-09-21,0.120000
2018-12-07,4.133000
2025-09-11,0.055000
2026-06-18,0.016000
2023-12-14,4.313000
2025-06-18,0.121000
2018-09-20,0.131000
2023-06-08,0.138000
2022-09-08,0.134000
2017-03-15,0.132000
2022-03-10,0.141000