f/overrides/event-backup/ixus-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
2013-12-18,0.322000
2022-12-13,0.490000
2023-12-20,1.048000
2012-12-18,0.172000
2025-12-16,1.570000
2018-06-19,0.891000
2019-06-17,0.937000
2021-06-10,0.852000
2025-06-16,1.171000
2014-12-17,0.607000
2024-12-17,1.182000
2021-12-30,0.086000
2023-06-07,0.982000
2013-06-27,0.875000
2014-06-25,0.965000
2016-12-21,0.547000
2020-12-14,0.707000
2015-06-25,0.815000
2016-06-22,0.754000
2017-06-20,0.739000
2022-06-09,0.948000
2019-12-16,0.977000
2021-12-13,1.273000
2024-06-11,1.019000
2026-06-15,1.233000
2015-12-21,0.574000
2017-12-19,0.778000
2018-12-18,0.686000
2020-06-15,0.535000