f/overrides/event-backup/dfscx-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
2001-12-17,1.714000
2019-12-17,0.432000
1986-11-21,1.305000
1995-11-27,0.082000
2004-12-20,0.358000
2023-12-13,0.379000
2018-12-18,0.862000
2021-12-15,2.704000
1995-12-27,0.755000
2000-12-18,1.991000
2003-12-22,0.175000
2015-12-16,1.019000
2013-12-12,0.902000
1987-12-31,1.303000
1989-12-12,0.622000
1991-12-10,0.096000
1996-12-27,1.158000
1992-12-15,0.674000
2005-12-19,0.842000
2007-12-19,1.157000
2017-12-15,1.015000
2006-12-18,1.133000
1990-12-11,0.724000
1993-12-15,0.582000
2016-12-15,0.939000
2002-12-16,0.138000
2012-12-13,0.764000
2014-12-16,1.115000
2022-12-14,0.933000
1988-12-13,0.912000
1993-11-16,0.040000
1997-12-22,1.890000
1999-12-20,0.890000