f/overrides/event-backup/mlpb-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
2025-07-14,0.420000
2016-01-11,0.496000
2017-04-10,0.439000
2018-01-12,0.393000
2022-07-13,0.296000
2024-04-11,0.358000
2024-07-15,0.393000
2025-04-11,0.411000
2025-01-13,0.390000
2016-07-12,0.447000
2017-01-11,0.431000
2018-07-13,0.396000
2019-04-11,0.387000
2021-04-12,0.269000
2022-04-11,0.267000
2023-04-12,0.327000
2020-04-09,0.396000
2023-01-12,0.310000
2023-07-13,0.370000
2025-10-10,0.426000
2022-01-11,0.265000
2016-10-11,0.441000
2017-07-12,0.395000
2017-10-12,0.415000
2018-10-11,0.404000
2019-07-12,0.388000
2020-10-09,0.314000
2021-07-13,0.264000
2018-04-12,0.411000
2019-01-11,0.391000
2021-10-12,0.264000
2023-10-12,0.356000
2016-04-08,0.492000
2020-07-13,0.302000
2026-07-14,0.444000
2019-10-10,0.387000
2022-10-12,0.297000
2026-04-13,0.436000
2020-01-10,0.403000
2021-01-12,0.278000
2024-01-12,0.363000
2024-10-11,0.384000
2026-01-13,0.436000