f/overrides/event-backup/fnmix-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
2012-02-10,0.045000
2013-02-15,0.122000
1994-02-04,0.200000
1997-12-26,0.870000
2003-12-26,0.050000
2008-02-15,0.040000
2009-12-18,0.020000
2011-12-16,0.119000
2018-02-09,0.044000
2021-02-12,0.040000
2004-02-06,0.140000
2005-02-04,0.300000
2010-12-17,0.130000
2013-12-20,0.214000
2014-12-19,0.251000
2017-12-01,0.074000
2006-02-03,0.060000
2006-12-22,0.360000
2012-12-21,0.301000
2016-12-02,0.138000
2004-12-23,0.190000
2005-12-23,0.260000
2007-12-28,0.040000
2020-12-01,0.011000