f/overrides/event-backup/fzanx-capitalGain.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,Capital Gains
2016-02-12,0.228000
2017-12-08,2.130000
2021-12-10,4.175000
2023-12-08,1.547000
2025-02-07,0.539000
2013-12-13,3.653000
2014-12-12,1.965000
2015-02-13,0.154000
2018-12-07,2.969000
2019-02-08,0.166000
2020-12-11,2.770000
2022-12-09,3.174000
2023-02-03,0.395000
2024-02-09,0.185000
2016-12-09,1.053000
2017-02-10,0.258000
2018-02-09,0.684000
2020-02-07,0.202000
2021-02-12,0.906000
2022-02-04,0.535000
2025-12-05,4.122000
2014-02-14,0.076000
2015-12-11,0.980000
2019-12-13,1.869000
2024-12-06,2.224000