f/overrides/event-backup/gaa-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
2017-12-28,0.230000
2018-09-27,0.171000
2015-09-28,0.229000
2018-06-28,0.185000
2018-12-27,0.308000
2020-03-27,0.148000
2022-06-24,0.148000
2022-09-23,0.338000
2022-12-23,0.407000
2025-12-23,0.410000
2015-12-29,0.166000
2017-09-27,0.160000
2019-09-27,0.239000
2020-09-25,0.199000
2021-03-26,0.069000
2023-03-27,0.328000
2023-06-23,0.326000
2023-09-22,0.126000
2017-03-29,0.071000
2026-06-23,0.199000
2025-03-25,0.433000
2019-06-28,0.165000
2020-12-24,0.183000
2021-06-25,0.184000
2021-12-23,0.645000
2023-12-22,0.259000
2025-06-24,0.245000
2016-12-28,0.371000
2018-03-29,0.081000
2024-06-24,0.227000
2024-12-23,0.039000
2025-09-23,0.291000
2015-06-26,0.113000
2020-06-26,0.268000
2022-03-28,0.735000
2024-03-22,0.335000
2026-03-25,0.318000
2019-12-27,0.403000
2016-06-28,0.084000
2016-09-27,0.140000
2024-09-23,0.509000
2014-12-29,0.140000
2017-06-28,0.186000
2019-03-29,0.109000
2021-09-24,0.413000
2015-03-27,0.068000