f/overrides/event-backup/ccbbx-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
2001-11-14,0.116000
2005-12-08,0.047000
2008-12-23,0.035000
2021-12-22,0.061000
1998-11-12,0.204000
2004-12-20,0.017000
2009-12-22,0.027000
2020-12-23,0.383000
2022-12-19,0.005000
2023-12-20,0.014000
2003-12-19,0.249000
2010-12-22,0.011000
2002-12-11,0.054000
2015-12-23,0.015000