f/overrides/event-backup/fdevx-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
2015-12-23,0.188000
2016-09-02,0.003000
2017-09-01,0.007000
2017-12-22,0.286000
2019-02-15,0.061000
2021-10-01,0.025000
2021-12-17,1.596000
2015-09-04,0.029000
2025-10-01,0.020000
2024-12-20,0.403000
2019-12-20,1.074000
2020-12-18,0.593000
2022-10-03,0.395000
2023-12-20,0.686000
2024-10-01,0.159000
2014-09-05,0.359000
2020-10-02,0.098000
2022-12-20,0.435000
2025-12-22,0.765000
2018-12-21,0.326000
2016-12-22,0.255000
2019-03-15,0.064000
2019-04-15,0.062000
2019-10-04,0.004000
2022-12-15,0.109000
2014-12-23,3.696000