f/overrides/event-backup/awh-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
2008-03-14,0.06,2017-08-22
2016-09-16,0.26,2017-08-22
2014-09-19,0.225,2017-08-22
2017-07-07,5.0,2017-08-22
2012-07-26,0.125,2017-08-22
2012-09-14,0.125,2017-08-22
2007-05-24,0.05,2017-08-22
2009-05-21,0.06,2017-08-22
2008-11-21,0.06,2017-08-22
2015-03-20,0.225,2017-08-22
2007-08-24,0.05,2017-08-22
2009-08-21,0.06,2017-08-22
2006-12-01,0.05,2017-08-22
2013-03-01,0.125,2017-08-22
2011-12-21,0.125,2017-08-22
2010-11-29,0.08333,2017-08-22
2011-09-29,0.125,2017-08-22
2013-06-21,0.16667,2017-08-22
2013-12-20,0.16667,2017-08-22
2015-06-19,0.26,2017-08-22
2015-12-18,0.26,2017-08-22
2007-03-16,0.05,2017-08-22
2009-03-13,0.06,2017-08-22
2012-12-14,0.125,2017-08-22
2013-09-20,0.16667,2017-08-22
2015-09-18,0.26,2017-08-22
2012-03-28,0.125,2017-08-22
2008-05-22,0.06,2017-08-22
2009-11-20,0.06667,2017-08-22
2010-05-21,0.06667,2017-08-22
2010-03-12,0.06667,2017-08-22
2010-11-10,0.06667,2017-08-22
2014-03-21,0.16667,2017-08-22
2016-03-18,0.26,2017-08-22
2011-07-25,0.125,2017-08-22
2008-08-22,0.06,2017-08-22
2010-08-20,0.06667,2017-08-22
2007-11-30,0.06,2017-08-22
2016-06-17,0.26,2017-08-22
2016-12-16,0.26,2017-08-22
2014-06-20,0.225,2017-08-22
2014-12-19,0.225,2017-08-22