f/overrides/event-backup/dfjsx-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
1992-12-15,0.493000
1994-12-28,0.584000
1995-12-27,0.359000
1996-12-27,1.157000
2018-12-18,1.354000
2022-12-14,0.834000
2023-12-13,0.388000
1991-12-10,0.476000
1993-12-15,0.452000
1987-10-30,0.036000
1987-12-31,4.211000
1988-12-13,1.700000
1990-12-11,1.720000
1993-11-16,0.210000
1994-11-28,0.214000
1995-11-27,0.050000
2019-12-17,0.384000
1989-12-12,1.293000
2021-12-15,0.731000