f/overrides/event-backup/almrx-dividend.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,Dividends
1997-06-24,6.434000
1998-07-06,4.245000
2000-12-15,0.213000
2005-12-20,1.880000
2007-12-18,3.545000
2012-12-18,0.038000
2018-12-18,1.984000
2006-12-19,1.385000
2010-12-21,0.035000
2019-12-18,2.565000
2020-12-16,5.333000
2021-12-15,19.853000
1999-06-28,0.763000
2000-06-27,0.302000
2004-12-17,0.251000