f/overrides/event-backup/fmshx-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
2018-10-05,0.026000
2021-10-01,0.485000
2021-12-17,2.593000
2022-12-20,0.388000
2018-12-21,1.774000
2023-10-02,0.455000
2013-12-20,0.364000
2014-12-19,0.806000
2015-12-18,2.160000
2013-09-06,0.111000
2023-12-20,1.008000
2024-12-20,2.317000
2025-12-22,1.422000
2016-12-22,1.487000
2022-10-03,0.735000
2022-12-15,1.105000
2015-09-04,0.229000
2016-09-02,0.438000
2019-10-04,0.822000
2020-10-02,0.470000
2017-12-22,1.553000
2025-10-01,0.554000
2017-09-01,0.460000
2014-09-05,0.208000
2024-10-01,0.116000
2019-12-20,1.421000
2020-12-18,0.497000