f/overrides/event-backup/dwfix-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
2014-06-09,0.048000
2019-12-16,0.441000
2025-12-10,0.060000
2012-06-08,0.041000
2013-06-10,0.051000
2013-12-11,0.134000
2014-03-10,0.114000
2016-12-14,0.276000
2012-09-10,0.037000
2017-06-29,0.120000
2020-12-14,0.180000
2023-12-11,0.226000
2025-06-27,0.054000
2025-09-29,0.044000
2026-06-29,0.076000
2013-03-08,0.001000
2018-12-17,0.765000
2017-12-14,0.017000
2025-03-28,0.036000
2012-12-12,0.224000
2021-12-13,0.187000
2023-09-28,0.155000
2024-09-27,0.135000
2024-12-10,0.124000
2026-03-30,0.050000
2014-12-15,0.743000
2015-12-15,0.717000