f/overrides/event-backup/fyld-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
2022-12-22,0.119000
2023-06-22,0.751000
2015-06-25,0.589000
2017-06-27,0.454000
2018-12-26,0.486000
2019-06-27,0.340000
2021-09-23,0.381000
2025-06-18,0.469000
2014-03-27,0.089000
2016-06-27,0.493000
2018-09-26,0.174000
2021-03-25,0.133000
2024-12-20,0.402000
2020-03-26,0.267000
2020-12-23,0.273000
2022-03-24,0.266000
2022-06-23,0.587000
2014-09-26,0.145000
2019-03-28,0.176000
2019-12-26,0.183000
2025-09-18,0.403000
2025-03-20,0.020000
2026-06-18,0.362000
2014-06-26,0.346000
2017-09-26,0.127000
2018-06-27,0.451000
2022-09-22,0.516000
2023-12-14,0.211000
2014-12-29,0.569000
2020-09-24,0.175000
2021-06-24,0.639000
2023-03-23,0.296000
2025-12-18,0.430000
2021-12-22,0.143000
2024-06-21,0.743000
2026-03-20,0.099000
2015-09-25,0.209000
2016-09-26,0.076000
2017-12-27,0.171000
2019-09-26,0.210000
2020-06-25,0.236000
2013-12-27,0.017000
2023-09-21,0.304000
2024-03-21,0.218000