f/overrides/event-backup/dglax-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
2008-12-31,0.021000
2009-12-31,0.057000
2010-12-31,0.112000
2013-12-31,0.104000
2019-12-31,1.105000
2022-03-29,0.175000
2025-03-27,0.493000
2025-12-12,4.703000
2008-03-28,0.044000
2011-12-30,0.224000
2012-12-31,0.081000
2016-03-31,0.616000
2016-12-30,0.154000
2017-12-29,1.581000
2018-12-31,1.280000
2015-12-31,1.061000
2023-12-13,3.603000
2024-03-26,0.011000
2024-12-12,1.788000
2007-12-28,0.126000
2014-12-31,0.212000
2020-12-14,1.423000
2021-12-14,2.360000
2022-12-13,2.185000
2023-03-28,0.062000
2026-03-27,0.428000