f/overrides/event-backup/fmcdx-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
2006-12-08,1.703000
1998-12-18,0.460000
2002-01-04,0.060000
2012-12-14,0.161000
2013-12-13,0.006000
2015-12-18,0.511000
2020-12-29,0.883000
2004-01-09,0.045000
2005-12-09,2.628000
2006-01-06,0.785000
2007-12-14,3.341000
2009-12-11,0.058000
2016-01-15,0.059000
2021-12-28,5.708000
2023-12-26,0.236000
2024-12-26,1.287000
2001-01-05,0.170000
2005-01-07,0.450000
2007-01-05,0.370000
2018-12-26,6.262000
2022-12-27,3.358000
2000-01-07,0.200000
2004-12-10,0.720000
2011-12-16,0.097000
2012-12-27,0.018000
2025-12-26,3.653000
2016-12-27,0.195000
2019-12-27,1.480000
1996-12-20,0.010000
1999-12-17,1.200000
2000-12-15,1.890000
2008-01-11,0.130000
2010-04-30,0.009000
2017-12-26,1.755000