f/overrides/event-backup/cabix-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
2008-09-18,0.107000
2008-12-23,0.118000
2024-12-12,2.566000
2013-06-14,0.079000
2016-12-15,0.908000
2025-12-11,1.497000
2006-09-21,0.100000
2008-06-19,0.090000
2010-12-22,0.102000
2012-12-20,1.285000
2011-06-16,0.081000
2020-12-10,0.604000
2005-09-22,0.084000
2007-12-19,1.489000
2009-03-19,0.056000
2009-09-17,0.080000
2018-12-13,0.140000
2006-06-22,0.092000
2011-12-22,0.108000
2012-09-13,0.072000
2015-12-17,0.035000
2010-03-18,0.052000
2010-06-17,0.088000
2011-09-16,0.082000
2022-12-08,1.352000
2017-12-14,0.574000
2021-12-09,1.859000
2006-03-23,0.082000
2006-12-21,0.609000
2012-03-16,0.058000
2014-12-18,1.903000
2009-12-23,0.120000
2010-09-16,0.073000
2011-03-17,0.064000
2012-06-15,0.070000
2005-12-22,1.044000
2007-06-21,0.106000
2007-09-19,0.112000
2009-06-18,0.081000
2013-12-20,0.258000
2019-12-12,0.279000
2007-03-22,0.099000
2008-03-19,0.084000
2023-12-07,0.269000