f/overrides/event-backup/mgiax-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
2008-12-16,2.067000
2015-12-15,1.058000
2019-12-12,1.766000
2020-12-10,2.743000
2002-02-04,0.096000
2005-12-15,2.039000
2014-12-16,1.080000
2021-12-09,4.022000
2022-12-08,5.179000
1996-12-23,0.117000
2006-12-18,2.660000
2016-12-15,0.565000
2000-12-18,1.093000
2010-04-30,0.062000
2007-12-13,2.521000
2009-12-17,0.206000
2010-12-16,0.277000
1997-12-23,0.711000
2004-12-16,0.613000
2023-12-19,4.411000
1998-12-17,0.337000
2013-12-27,0.047000
2013-12-12,0.646000
2017-12-14,1.071000
2024-12-17,4.552000
2025-12-16,3.612000
1995-12-28,0.025000
1999-12-17,0.920000
2012-12-13,0.461000
2018-12-13,1.659000
2003-12-17,0.059000
2011-12-15,0.347000