f/overrides/event-backup/futy-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
2020-09-18,0.321000
2025-12-19,0.352000
2015-12-18,0.253000
2016-09-16,0.281000
2019-06-21,0.289000
2019-12-20,0.314000
2023-06-16,0.317000
2014-12-19,0.216000
2016-06-17,0.261000
2022-09-16,0.346000
2022-12-16,0.295000
2018-03-16,0.269000
2021-03-19,0.320000
2021-06-18,0.317000
2021-12-17,0.303000
2014-06-20,0.209000
2015-03-20,0.475000
2016-12-16,0.278000
2017-06-16,0.272000
2023-09-15,0.384000
2025-06-20,0.369000
2026-03-20,0.386000
2014-09-19,0.300000
2019-09-20,0.289000
2024-12-20,0.342000
2024-09-20,0.366000
2025-03-21,0.378000
2015-09-18,0.239000
2021-09-17,0.310000
2023-03-17,0.357000
2023-12-15,0.293000
2020-12-18,0.288000
2022-03-18,0.320000
2024-03-15,0.385000
2025-09-19,0.373000
2013-12-20,0.213000
2017-12-15,0.270000
2018-09-21,0.276000
2020-06-19,0.302000
2026-06-18,0.401000
2017-03-17,0.245000
2020-03-20,0.336000
2024-06-21,0.349000
2018-12-21,0.249000
2019-03-15,0.301000
2014-03-21,0.203000
2015-06-19,0.241000
2017-09-15,0.257000
2018-06-15,0.291000