f/overrides/event-backup/bdbkx-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
2014-12-12,1.246000
2024-07-18,0.048000
2013-12-13,0.337000
2017-12-15,0.416000
2015-12-11,0.255000
2018-07-19,0.010000
2020-12-10,0.092000
2022-07-14,0.059000
2024-12-12,0.657000
2014-07-17,0.164000
2015-07-16,0.158000
2018-12-14,0.519000
2019-12-12,0.419000
2021-07-15,0.080000
2021-12-09,1.593000
2022-12-13,0.003000
2023-12-14,0.316000
2016-07-21,0.074000
2016-12-15,0.528000