f/overrides/event-backup/fmilx-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
1998-01-02,0.070000
2001-01-05,0.530000
2003-12-19,0.010000
2016-12-27,2.245000
1995-12-15,1.350000
1996-12-13,0.510000
2000-12-22,9.080000
2002-06-28,0.058000
2006-12-15,10.300000
2010-01-08,0.010000
2018-12-26,5.697000
2020-12-29,3.146000
1994-01-07,0.040000
1997-12-26,2.850000
2000-01-07,1.030000
2004-01-30,0.069000
2007-01-05,0.490000
2008-01-11,0.080000
2012-01-06,0.065000
2017-12-26,3.475000
1993-12-10,0.260000
1995-01-06,0.050000
1996-01-05,0.090000
2002-10-31,0.071000
2022-10-07,0.077000
2022-12-27,1.582000
2023-12-26,1.849000
2009-12-18,0.105000
2011-12-16,0.904000
2013-01-11,0.030000
2015-12-11,4.013000
1997-01-03,0.040000
1998-12-18,1.870000
2006-03-03,0.830000
2007-12-21,3.900000
2016-01-15,0.152000
2014-12-12,3.036000
2024-12-26,2.161000
1994-12-09,0.240000
2008-12-19,0.110000
2012-12-14,3.005000
2013-12-13,2.000000
2014-09-05,0.022000
2019-12-27,1.650000
1999-12-17,6.300000
2002-07-31,0.063000
2010-12-17,0.150000
2014-01-10,0.303000
1999-01-08,0.070000
2019-10-04,0.124000
2021-12-28,3.456000
2025-12-26,3.440000