f/overrides/event-backup/fmsfx-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
1993-12-10,0.020000
1994-09-02,0.050000
2014-12-22,0.003000
1993-09-03,0.050000
1995-12-15,0.030000
1997-12-12,0.030000
2003-12-05,0.150000
2020-10-09,0.087000
2020-12-04,0.012000
1995-09-08,0.070000
1996-09-06,0.110000
2002-12-06,0.080000
2021-10-08,0.037000
1998-12-11,0.150000
2004-12-03,0.060000
2015-12-18,0.006000