f/overrides/event-backup/cfipx-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
2003-07-25,0.013000
2010-04-30,0.033000
2019-12-05,1.178000
1998-06-24,0.009000
2001-12-20,0.015000
2009-06-10,0.027000
2008-12-29,0.155000
2009-12-29,0.104000
2013-12-26,0.086000
2021-12-03,1.876000
1992-12-24,0.023000
1996-12-19,0.011000
2005-12-28,0.150000
2006-06-23,0.003000
2006-11-30,2.294000
2007-12-13,0.368000
2007-12-27,0.024000
2012-12-27,0.115000
1996-06-20,0.010000
2003-12-29,0.033000
2005-08-19,0.004000
2020-12-04,0.134000
2022-12-15,0.830000
2004-12-16,0.085000
2010-12-29,0.104000
2024-12-17,0.850000
2025-12-16,1.809000
1991-12-26,0.030000
1994-12-22,0.008000
2004-07-28,0.019000
1997-12-19,0.025000
2015-12-09,0.136000
2017-12-06,0.134000
1999-06-23,0.130000
2011-12-28,0.150000
2007-06-22,0.386000
2014-12-10,0.133000
2016-12-07,0.216000
2018-12-06,1.122000
2023-12-15,0.200000
1995-12-20,0.048000
2000-12-20,0.869000
2006-12-27,0.023000