f/overrides/event-backup/cfgrx-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
1996-06-28,0.054000
2018-12-26,0.224000
2020-12-04,1.743000
2018-12-07,2.856000
2022-12-22,0.082000
2023-12-21,0.120000
1997-03-21,0.040000
2002-06-28,0.094000
2008-12-29,0.053000
2009-12-28,0.109000
2016-12-30,0.244000
1999-12-03,3.945000
2004-12-28,0.035000
2015-12-28,0.208000
2025-12-04,9.391000
1997-12-19,0.027000
1998-12-18,0.012000
2023-12-07,1.829000
2024-12-05,5.318000
2002-10-31,0.090000
1998-12-11,5.469000
2007-12-26,0.040000
2013-12-06,4.486000
1998-06-24,0.009000
2021-12-27,0.073000
2022-12-08,2.286000
2014-12-05,7.855000
2016-12-02,1.389000
2024-12-19,0.057000
1996-12-31,0.036000
1997-06-23,0.057000
2006-12-26,0.035000
2007-12-04,0.290000
1998-09-24,0.008000
2000-12-01,7.273000
2020-12-28,0.153000
2019-12-27,0.198000
2021-12-03,10.122000
1996-09-30,0.055000
1997-09-23,0.055000
1998-03-31,0.018000
2014-12-26,0.249000
1997-12-05,2.239000
2011-12-23,0.115000
2012-12-07,1.039000
2012-12-26,0.189000
1996-12-02,1.919000
2017-12-08,1.636000
2019-12-06,2.016000
2017-12-22,0.232000
2025-12-18,0.056000
2005-12-27,0.119000
2010-12-27,0.123000
2013-12-27,0.189000
2015-12-04,2.940000