f/overrides/event-backup/jqua-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
2021-09-21,0.134000
2025-06-24,0.177000
2018-03-21,0.096000
2020-06-23,0.103000
2022-12-20,0.200000
2024-09-24,0.174000
2025-03-25,0.159000
2026-06-23,0.188000
2020-09-22,0.117000
2023-03-21,0.099000
2026-03-24,0.176000
2017-12-26,0.103000
2024-12-24,0.240000
2025-09-23,0.167000
2019-09-24,0.121000
2020-12-22,0.206000
2021-03-23,0.137000
2021-12-21,0.212000
2022-06-21,0.162000
2022-09-20,0.145000
2023-12-28,0.010000
2024-03-19,0.116000
2024-06-25,0.181000
2018-12-24,0.147000
2019-03-20,0.092000
2019-06-25,0.149000
2021-06-22,0.117000
2022-03-22,0.111000
2023-06-20,0.139000
2023-12-19,0.193000
2025-12-23,0.250000
2019-12-23,0.160000
2018-06-26,0.149000
2018-09-25,0.129000
2020-03-24,0.092000
2023-09-19,0.141000