f/overrides/event-backup/jmuex-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
1999-12-17,2.548000
2006-08-30,0.123000
2008-12-18,0.053000
2023-12-13,0.232000
1996-08-16,0.872000
1997-12-23,1.343000
2005-12-15,0.159000
2013-12-12,0.970000
2014-12-12,1.268000
2015-12-11,0.697000
2016-12-14,0.535000
2020-12-11,1.107000
1996-12-26,0.408000
1998-12-17,4.034000
2001-12-21,0.020000
2007-12-17,1.560000
2011-12-15,0.057000
2018-12-12,1.790000
2019-12-12,1.463000
2021-12-13,2.226000
1997-08-14,1.370000
2000-12-19,0.711000
2006-12-15,1.268000
2012-12-13,0.237000
2017-12-13,1.259000
2022-12-13,0.675000