f/overrides/event-backup/fdklx-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
2018-05-11,0.029000
2021-05-14,0.038000
2020-12-30,0.044000
2016-12-28,0.013000
2019-12-30,0.654000
2020-05-08,0.028000
2021-12-30,0.023000
2015-12-29,0.003000
2016-05-13,0.018000
2017-12-28,0.012000
2019-05-10,0.025000
2022-05-13,0.010000
2025-05-09,0.004000
2014-12-29,0.002000
2017-05-12,0.046000