f/overrides/event-backup/jpin-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
2020-06-23,0.452000
2021-09-21,0.574000
2021-12-21,1.529000
2022-03-22,0.201000
2024-09-24,0.445000
2015-12-24,1.077000
2018-03-21,0.092000
2024-12-24,1.006000
2018-06-26,0.655000
2021-06-22,0.619000
2024-03-19,0.015000
2020-03-24,0.134000
2023-12-19,1.393000
2024-06-25,0.782000
2025-09-23,0.433000
2018-12-24,0.361000
2019-03-20,0.146000
2023-06-20,1.334000
2025-06-24,0.908000
2026-03-24,0.180000
2019-06-25,0.822000
2020-09-22,0.434000
2020-12-22,0.405000
2021-12-30,0.094000
2023-03-21,0.144000
2025-03-25,0.185000
2025-12-23,1.538000
2019-09-24,0.376000
2019-12-23,0.539000
2021-03-23,0.159000
2023-09-19,0.510000
2014-12-24,0.147000
2018-09-25,0.279000
2022-06-21,0.787000
2022-09-20,0.256000
2022-12-20,0.262000
2026-06-23,0.913000
2016-12-23,0.817000
2017-12-26,1.272000