f/overrides/event-backup/fsrbx-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
2009-12-11,0.050000
2014-12-22,0.396000
2005-04-15,0.670000
2016-12-16,0.245000
2021-04-09,0.013000
1987-12-11,0.060000
1988-12-12,0.670000
1989-06-13,0.090000
2004-04-08,0.150000
2014-04-11,0.815000
1996-04-12,0.610000
1996-12-06,1.060000
1997-04-11,0.170000
2002-04-12,0.040000
2025-04-11,0.501000
2003-12-05,0.880000
2010-04-19,0.046000
2013-12-20,0.687000
2015-12-18,0.781000
2004-12-03,3.880000
2005-12-09,3.180000
2006-04-13,0.730000
2017-12-15,0.904000
1993-04-08,0.200000
1994-12-16,1.050000
1998-04-09,0.630000
2001-12-07,0.380000
2019-12-20,1.106000
2007-04-13,1.000000
2022-12-16,0.922000
2023-04-14,0.698000
2025-12-26,2.571000
1991-12-13,0.680000
1994-04-15,0.220000
1995-12-08,0.970000
1999-12-03,5.550000
1998-12-04,2.310000
2015-04-10,0.661000
2024-04-12,0.158000
1993-12-17,3.870000
1999-04-09,2.250000
2013-04-12,0.038000
2019-04-05,0.566000
2020-04-08,1.491000
2022-04-08,0.579000
2003-04-11,0.060000
2007-12-14,1.520000
2017-04-07,0.006000
2018-04-06,2.636000
2021-12-17,0.988000
2026-04-10,0.792000
1997-12-05,1.340000
2000-12-08,0.490000
2011-12-09,0.074000
2012-12-21,0.224000
2023-12-21,0.643000
1990-12-07,0.150000
2006-12-08,5.370000
2008-12-12,0.420000
2009-04-17,0.160000
2001-04-12,0.110000
2012-04-13,0.016000
2000-04-14,2.590000
2018-12-14,4.631000
2020-12-18,0.429000
2024-12-26,1.241000
1989-12-08,0.670000
1992-06-12,0.110000
1992-12-11,0.810000
2002-12-06,0.300000
2008-04-11,0.140000