f/overrides/event-backup/fsczx-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
2019-12-13,0.392000
2020-03-06,0.108000
2022-12-09,1.209000
2024-12-20,2.398000
2026-03-13,0.895000
2017-12-08,0.246000
2020-12-11,0.397000
2023-03-10,0.084000
2025-03-07,0.439000
2021-12-10,1.175000
2024-03-08,0.457000
2025-12-19,1.656000
2018-12-07,1.353000
2022-03-04,0.718000
2023-12-15,0.584000