f/overrides/event-backup/drcvx-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
1998-12-24,3.100000
2002-12-27,0.440000
2008-12-29,0.060000
2024-12-27,0.086000
1987-12-29,8.400000
1988-12-13,7.600000
1989-12-13,5.580000
2000-12-27,2.030000
2025-12-29,0.087000
1993-12-21,2.400000
1994-12-20,2.600000
1997-12-17,9.600000
2002-12-26,0.440000
2005-12-28,0.400000
2007-12-27,0.600000
1992-12-22,6.100000
1999-12-23,0.510000
2001-12-27,1.500000
2006-12-27,0.840000
2023-12-27,0.068000
1990-12-20,9.850000
1995-12-13,4.550000
1996-12-19,5.850000