f/overrides/event-backup/bauux-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
2022-12-13,1.568000
2012-12-31,0.075000
2016-12-28,0.093000
2018-12-17,2.934000
2019-12-20,0.127000
2020-12-23,0.146000
2021-12-14,0.097000
2023-12-26,0.206000
2025-12-15,3.402000
2016-12-19,0.032000
2017-12-19,1.014000
2018-12-21,0.209000
2024-12-27,0.464000
2013-12-13,0.942000
2015-12-29,0.105000
2024-12-13,4.280000
2017-12-27,0.196000
2019-12-16,1.144000
2021-12-27,0.098000
2022-12-27,0.130000
2023-12-13,1.583000
2013-12-27,0.190000
2014-12-23,1.315000
2015-12-21,0.452000
2025-12-29,0.197000