f/overrides/event-backup/nesgx-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
2014-11-25,1.700000
2017-11-10,1.402000
2022-11-10,0.644000
2021-11-10,5.818000
2006-11-14,4.182000
2015-11-10,0.314000
2018-11-09,2.762000
2019-11-08,1.482000
2005-11-14,1.789000
2011-11-29,0.635000
2020-11-11,3.531000
2010-11-16,0.433000
2016-11-09,1.017000
2004-11-12,0.048000
2007-11-14,2.754000
2008-11-13,0.997000
2009-11-12,0.012000