f/overrides/event-backup/frsgx-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
1994-12-15,0.009000
2008-12-15,0.062000
2011-12-15,1.636000
1993-12-15,0.018000
1996-12-16,0.864000
2000-12-15,0.476000
2006-12-15,2.841000
2015-12-15,3.135000
2020-12-15,4.141000
1992-12-15,0.032000
1995-06-15,0.014000
1999-12-15,0.303000
2016-12-15,2.111000
1992-06-15,0.055000
2007-12-14,6.720000
2019-12-16,6.189000
1997-12-15,1.019000
1993-06-15,0.025000
2005-12-15,0.043000
2017-12-15,3.101000
2025-12-22,3.035000
1994-06-15,0.012000
1998-12-15,0.327000
2012-12-17,3.477000
2013-12-16,5.783000
2014-12-15,7.611000
2018-12-17,4.142000
2021-12-15,6.920000
2001-12-14,0.084000
2022-12-15,1.877000