f/overrides/event-backup/flvcx-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
2020-12-18,0.010000
2024-09-13,4.433000
2008-12-30,0.010000
2013-12-06,0.117000
2009-09-11,0.079000
2017-12-01,1.232000
2022-12-16,1.148000
2023-09-08,3.045000
2023-12-15,1.205000
2004-09-03,1.000000
2006-12-08,0.380000
2010-09-08,0.036000
2015-09-11,1.860000
2022-09-09,4.623000
2025-09-12,0.891000
2004-12-29,0.020000
2006-09-08,1.140000
2011-12-09,0.291000
2012-12-07,0.103000
2016-09-16,2.557000
2003-09-05,0.100000
2003-12-05,0.170000
2019-12-20,0.033000
2020-09-11,0.034000
2004-12-03,0.140000
2005-12-09,0.160000
2007-12-14,0.400000
2012-12-27,0.020000
2013-09-06,0.155000
2016-12-02,6.591000
2021-09-10,2.371000
2025-12-19,1.185000
2001-09-07,0.090000
2001-12-14,0.110000
2008-12-12,0.091000
2014-09-05,0.163000
2014-12-05,0.181000
2018-12-14,1.029000
2021-12-17,1.630000
2005-09-09,0.440000
2005-12-29,0.020000
2009-12-11,0.035000
2010-12-10,0.071000
2015-12-04,1.000000
2017-09-15,5.152000
2018-09-14,3.738000
2024-12-20,1.126000
2007-09-07,1.380000
2008-09-12,0.287000