f/overrides/event-backup/fdegx-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
1999-01-08,0.720000
2000-01-07,1.410000
2008-12-30,0.002000
2012-12-27,0.010000
1992-12-18,0.050000
1994-01-07,0.270000
1995-12-08,0.800000
1998-01-02,0.080000
2000-12-22,6.170000
2005-04-22,0.033000
1991-12-20,0.390000
1992-01-03,0.110000
2012-12-14,0.081000
2016-12-27,0.199000
2017-12-26,0.177000
2018-12-26,0.284000
2021-12-28,8.987000
1993-12-17,3.060000
1994-12-16,0.040000
1996-12-13,0.320000
2001-01-05,0.090000
2019-12-27,1.764000
2025-12-26,6.634000
2008-12-12,0.026000
1993-01-08,0.510000
1997-12-26,6.000000
1998-12-18,2.000000
1999-12-17,3.200000
2013-12-13,0.051000
2020-12-29,4.999000
2024-12-26,5.238000
1996-01-05,0.280000
2007-02-02,0.010000
2014-12-12,0.099000
2015-12-11,0.044000
2019-09-06,0.063000
2023-12-26,0.031000