f/overrides/event-backup/flcsx-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
2007-12-07,0.440000
2009-12-30,0.005000
2014-06-06,0.985000
2020-12-18,0.777000
1997-06-06,0.510000
2004-06-04,0.040000
2008-06-06,0.035000
2013-06-07,0.632000
2022-12-16,0.340000
1997-12-05,0.620000
2014-12-05,0.720000
2016-06-10,0.440000
2025-06-13,1.381000
1996-12-06,0.210000
1998-06-05,2.250000
1999-06-04,0.270000
2011-12-02,0.131000
2012-06-08,0.029000
2010-06-11,0.015000
2015-06-05,0.545000
2019-06-07,0.748000
2003-12-05,0.050000
2019-12-20,1.074000
1996-06-07,0.020000
2005-06-03,0.040000
2020-06-05,0.603000
2024-12-20,0.982000
2026-06-12,3.276000
2018-12-14,1.860000
2025-12-29,0.103000
2000-12-08,0.010000
2005-12-02,0.060000
2010-12-03,0.090000
2012-12-27,0.005000
2017-12-01,0.765000
2008-12-05,0.110000
2017-06-09,0.401000
2024-06-14,1.338000
2006-12-01,0.080000
2010-04-30,0.032000
2015-12-04,0.743000
2016-12-02,0.619000
2021-06-04,0.766000
2001-12-07,0.040000
2006-06-02,0.030000
2007-06-01,0.050000
2011-06-10,0.043000
2004-12-03,0.100000
2021-12-17,1.218000
2023-06-09,0.255000
2023-12-15,1.022000
1999-12-03,0.200000
2000-06-02,0.790000
2002-12-06,0.040000
2012-12-07,0.171000
2022-06-10,0.815000
2025-11-18,2.732000
1995-12-08,0.030000
2003-06-06,0.020000
2009-06-12,0.040000
2013-12-06,0.542000
2018-06-08,1.850000
2009-12-04,0.030000