f/overrides/event-backup/gtddx-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
1999-12-15,0.040000
2006-12-15,0.060000
2023-12-13,0.505000
2019-12-13,0.573000
2000-12-14,0.048000
2003-12-12,0.021000
2010-12-10,0.261000
2013-12-13,0.376000
2015-12-11,0.242000
2010-04-16,0.008000
2017-12-13,0.266000
2020-12-15,2.169000
2021-12-14,1.706000
1998-12-16,0.123000
2001-12-14,0.087000
2005-12-16,0.114000
2008-12-12,0.742000
2022-12-14,0.365000
2007-12-14,1.611000
2009-12-11,0.333000
2010-04-30,0.021000
2018-12-14,0.462000
2014-12-12,0.891000
2016-12-13,0.249000
1995-12-20,0.722000
1996-12-19,0.478000
1997-12-08,0.597000
2011-12-09,0.829000
1994-12-22,0.350000
2012-12-07,0.242000
2024-12-12,0.379000
2025-12-11,7.388000