f/overrides/event-backup/carz-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
2023-09-22,0.120000
2024-12-13,0.289000
2012-09-21,0.025000
2015-09-23,0.039000
2019-12-13,0.302000
2020-09-24,0.043000
2022-09-23,0.115000
2013-12-18,0.065000
2017-06-22,0.452000
2017-09-21,0.166000
2025-12-12,1.077000
2017-12-21,0.267000
2023-06-27,0.348000
2014-03-25,0.022000
2014-06-24,0.395000
2015-03-25,0.042000
2015-06-24,0.323000
2016-06-22,0.397000
2021-09-23,0.085000
2022-12-23,0.236000
2012-12-21,0.067000
2017-03-23,0.003000
2018-12-18,0.244000
2019-03-21,0.055000
2020-06-25,0.106000
2011-12-21,0.024000
2012-06-21,0.136000
2020-12-24,0.178000
2021-12-23,1.057000
2022-03-25,0.066000
2024-06-27,0.266000
2013-06-21,0.223000
2016-12-21,0.260000
2018-09-14,0.110000
2019-09-25,0.263000
2021-06-24,0.207000
2024-09-26,0.057000
2025-06-26,0.297000
2011-06-21,0.047000
2014-09-23,0.012000
2018-06-21,0.540000
2023-03-24,0.106000
2023-12-22,0.223000
2022-06-24,0.227000
2025-09-25,0.289000
2014-12-23,0.203000
2015-12-23,0.189000
2016-03-23,0.067000
2016-09-21,0.128000
2019-06-14,0.470000