f/overrides/event-backup/jamrx-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
2000-12-15,2.777000
2014-12-17,6.161000
2016-12-19,2.165000
1997-12-29,1.900000
1995-12-29,0.305000
1999-12-10,1.165000
2013-12-17,0.129000
2015-12-17,3.838000
2017-04-26,1.473000
2017-12-19,2.261000
2019-12-17,4.928000
1994-12-30,0.105000
2024-12-06,4.334000
2023-12-07,1.896000
2018-12-18,4.347000
2020-12-17,1.839000
2022-12-20,0.114000
2025-12-05,10.719000
1996-12-27,2.281000
2021-12-20,8.854000
1998-12-28,1.541000