f/overrides/event-backup/ahl-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,ctime
2006-08-09,0.15,2017-08-22
2004-06-24,0.03,2017-08-22
2014-11-10,0.2,2017-08-22
2014-11-11,0.2,2017-08-22
2015-02-18,0.2,2017-08-22
2011-05-11,0.15,2017-08-22
2015-05-06,0.21,2017-08-22
2013-11-08,0.18,2017-08-22
2010-02-18,0.15,2017-08-22
2006-02-24,0.15,2017-08-22
2011-08-09,0.15,2017-08-22
2015-08-05,0.21,2017-08-22
2007-05-11,0.15,2017-08-22
2009-11-06,0.15,2017-08-22
2015-11-10,0.21,2017-08-22
2005-08-04,0.15,2017-08-22
2016-02-17,0.21,2017-08-22
2010-05-11,0.15,2017-08-22
2010-11-09,0.15,2017-08-22
2014-05-07,0.2,2017-08-22
2004-03-19,0.03,2017-08-22
2011-02-16,0.15,2017-08-22
2010-08-10,0.15,2017-08-22
2014-08-07,0.2,2017-08-22
2007-02-16,0.15,2017-08-22
2004-08-11,0.03,2017-08-22
2004-11-30,0.03,2017-08-22
2008-08-08,0.15,2017-08-22
2017-02-22,0.22,2017-08-22
2016-11-08,0.22,2017-08-22
2013-02-19,0.17,2017-08-22
2017-05-10,0.24,2017-08-22
2009-05-11,0.15,2017-08-22
2011-11-08,0.15,2017-08-22
2013-05-08,0.18,2017-08-22
2012-02-15,0.15,2017-08-22
2017-08-10,0.24,2017-08-22
2009-08-10,0.15,2017-08-22
2005-03-11,0.15,2017-08-22
2008-02-13,0.15,2017-08-22
2013-08-07,0.18,2017-08-22
2007-11-08,0.15,2017-08-22
2006-06-07,0.15,2017-08-22
2006-12-15,0.15,2017-08-22
2007-08-03,0.15,2017-08-22
2014-02-19,0.18,2017-08-22
2005-12-08,0.15,2017-08-22
2012-05-08,0.17,2017-08-22
2012-11-06,0.17,2017-08-22
2016-05-05,0.22,2017-08-22
2016-08-10,0.22,2017-08-22
2005-06-03,0.15,2017-08-22
2009-02-11,0.15,2017-08-22
2012-08-08,0.17,2017-08-22
2008-05-08,0.15,2017-08-22
2008-11-07,0.15,2017-08-22