f/overrides/event-backup/fncmx-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
2007-01-05,0.070000
2007-12-21,0.500000
2014-12-12,0.253000
2016-01-15,0.044000
2017-12-26,0.023000
2005-12-16,0.090000
2006-01-06,0.040000
2015-12-11,0.431000
2019-12-27,3.871000
2013-12-13,0.491000
2014-01-10,0.026000
2014-12-31,0.009000
2016-12-27,0.027000
2004-12-17,0.080000
2005-01-07,0.060000
2006-12-15,0.180000
2018-12-26,0.853000