f/overrides/event-backup/jpus-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
2024-03-19,0.379000
2021-12-21,0.693000
2023-03-21,0.357000
2023-06-20,0.591000
2025-12-23,0.904000
2026-06-23,0.677000
2020-06-23,0.444000
2023-12-19,0.801000
2024-09-24,0.586000
2021-09-21,0.413000
2023-09-19,0.575000
2024-06-25,0.635000
2025-06-24,0.693000
2021-03-23,0.292000
2018-12-24,0.417000
2022-06-21,0.515000
2022-09-20,0.530000
2018-03-21,0.218000
2018-06-26,0.347000
2019-12-23,0.605000
2020-03-24,0.322000
2020-12-22,0.486000
2024-12-24,0.824000
2026-03-24,0.540000
2016-12-23,0.459000
2017-12-26,0.879000
2018-09-25,0.421000
2019-03-20,0.269000
2019-06-25,0.443000
2020-09-22,0.374000
2021-06-22,0.369000
2025-09-23,0.678000
2015-12-24,0.260000
2022-03-22,0.355000
2022-12-20,0.831000
2025-03-25,0.537000
2019-09-24,0.350000