f/overrides/event-backup/dmcvx-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
2019-12-10,0.068000
2021-12-08,4.135000
2007-12-10,5.720000
2009-12-10,0.069000
2013-12-04,4.255000
2023-12-12,1.184000
1999-12-07,1.240000
2017-12-12,4.375000
2000-12-04,3.280000
2018-12-11,6.928000
2020-12-08,0.033000
2022-12-08,1.902000
2006-12-11,2.941000
1998-12-04,1.782000
2001-12-10,1.710000
2012-12-24,0.062000
2016-12-13,1.507000
2025-12-10,4.040000
1995-12-12,0.035000
2005-12-14,3.381000
2011-12-16,4.662000
2014-12-04,4.392000
2015-12-15,6.101000
2024-12-11,3.182000
1997-12-05,1.045000
1996-12-09,0.040000
2012-05-11,0.013000
2008-12-10,0.032000