f/overrides/event-backup/fzalx-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
2013-12-13,0.213000
2018-12-07,1.001000
2019-12-13,0.596000
2023-12-15,0.210000
2024-12-20,0.155000
2014-08-08,0.341000
2014-12-12,0.133000
2015-08-07,0.264000
2015-12-11,0.140000
2017-08-11,2.096000
2017-12-08,0.466000
2022-12-09,0.056000
2018-08-10,1.633000
2021-08-06,0.588000
2022-08-05,0.457000
2016-12-09,0.085000
2019-08-09,1.106000
2020-08-07,0.498000
2020-12-11,0.504000
2024-08-09,0.265000
2025-08-08,0.657000