f/overrides/event-backup/muxyx-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
1996-12-13,0.266000
2013-12-27,1.268000
2017-12-20,3.334000
2018-12-19,1.863000
2021-12-16,1.899000
2000-09-25,0.269000
2012-12-27,2.265000
2015-12-29,2.069000
2016-12-28,1.385000
2024-12-13,4.094000
2010-12-29,2.369000
2014-12-29,1.736000
2019-12-17,2.485000
1997-12-11,1.990000
1999-09-24,0.276000
2007-09-26,0.114000
2007-12-27,1.244000
2008-12-29,0.066000
2020-12-16,1.372000
2022-12-14,1.426000
2023-12-13,1.152000
1998-12-14,0.237000
2000-12-14,0.008000
2008-09-26,1.931000
2009-12-29,0.657000
2011-12-28,2.474000